CN109082592A - A kind of well corrosion-resistant spring steel gren rod of comprehensive performance and its production technology - Google Patents
A kind of well corrosion-resistant spring steel gren rod of comprehensive performance and its production technology Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 79
- 230000007797 corrosion Effects 0.000 title claims abstract description 78
- 229910000639 Spring steel Inorganic materials 0.000 title claims abstract description 67
- 238000005516 engineering process Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000005096 rolling process Methods 0.000 claims abstract description 72
- 238000007670 refining Methods 0.000 claims abstract description 53
- 238000003723 Smelting Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000009749 continuous casting Methods 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 169
- 239000010959 steel Substances 0.000 claims description 169
- 238000000034 method Methods 0.000 claims description 128
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 112
- 239000002893 slag Substances 0.000 claims description 89
- 230000008569 process Effects 0.000 claims description 73
- 229910052786 argon Inorganic materials 0.000 claims description 56
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 41
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 23
- 239000010703 silicon Substances 0.000 claims description 23
- 238000010079 rubber tapping Methods 0.000 claims description 22
- 238000002791 soaking Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 20
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000004615 ingredient Substances 0.000 claims description 13
- 239000004571 lime Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052882 wollastonite Inorganic materials 0.000 claims description 13
- 239000010456 wollastonite Substances 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 239000005864 Sulphur Substances 0.000 claims description 12
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 239000010436 fluorite Substances 0.000 claims description 12
- 238000011068 loading method Methods 0.000 claims description 12
- 238000001556 precipitation Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 229910000677 High-carbon steel Inorganic materials 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 11
- 230000007547 defect Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 11
- 230000014759 maintenance of location Effects 0.000 claims description 11
- 238000005272 metallurgy Methods 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 230000004580 weight loss Effects 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 14
- 239000000203 mixture Substances 0.000 abstract description 13
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 238000005204 segregation Methods 0.000 description 17
- 238000003763 carbonization Methods 0.000 description 9
- 230000009467 reduction Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 239000010813 municipal solid waste Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 241000254158 Lampyridae Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of well corrosion-resistant spring steel gren rod of comprehensive performance and its production technologies, the gren rod chemical component composition and its mass percentage are as follows: C:0.40~0.70%, Si:1.4~1.9%, Mn:0.5~0.8%, P≤0.025%, S:0.002~0.020%, Cr:0.80~1.50%, Ni:0.20~0.50%, Cu:0.20~0.50%, Nb:0.004~0.020%, Al:0.003~0.010%, remaining is Fe and inevitable impurity；The production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process.Spring is made through customer's heat treatment in the corrosion-resistant spring steel gren rod of the present invention, and corrosion resistance especially spot corrosion voltage improves 0.185V or more, has certain promotional value.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of well corrosion-resistant spring steel gren rod of comprehensive performance and
Its production technology.
Background technique
With closing on for " 2025 " made in China paces, China's machinery industry high speed development, high temperature spring, disc spring and wave
Shape spring dosage is more come bigger.These spring Service Environments are complicated, may be from the multiple images such as change impacts, high temperature, chemical attack
It rings.Segregation in spring steel and it is mingled with and is formed by potential difference and can cause electrochemical corrosion, because of spring steel metallographic at room temperature
Tissue is F+P, the sulphur phosphorus impurities in steel and cementite and impurity and field trash electronics in non-metallic inclusion, pearlite
Current potential is higher than iron, and micro cell reaction can occur in conductive humid air, and iron loses electronics, and impurity obtains electronics, electronics
Transfer phenomena occurs, and accelerates electrochemical reaction if environment temperature height, spring life is made to have a greatly reduced quality, and initial failure.By
It is very high in requirement of the spring to fatigue life and reliability, therefore to the quality requirements such as the field trash of spring steel wire and segregation
Also very strict.
Most domestic iron and steel enterprise mostly uses process flow: converter (electric furnace) tapping aluminium (a small amount of) deoxidation+LF+VD (RH) is de-
Gas+continuous casting+hot rolling, the i.e. strong deoxidation of aluminium, refined synthetic slag use CaO-Al2O3Base slag system, control clinker are high alkalinity suboxides
Property, in subsequent SiCa line of feeding to Al2O3Equal field trashes carry out denaturation treatment, and the large inclusions of formation float and are discharged, and remain
It is the spherical impurities of small and dispersed in steel.But since other technological factors are unreasonable (refining time, Argon system etc.),
Even if oxygen content is controlled, will also result in brittleness and indeformable field trash cannot sufficiently be denaturalized or float and be trapped in molten steel
In.Using silicon/manganese deoxidation be another smelting process but there is also deficiencies.
Using al-free deoxidation technique, such as patent of invention (authorization CN105907919A；Apply for day for announcing 2016.08.31) it is public
A kind of refinery practice using al-free deoxidation and low basicity slag is opened.Its process flow: electric furnace-LF-VD- continuous casting.But this is specially
Benefit use arc furnace steeling process, molten steel residual elements are higher, and the LF refining phase using double slag operation (early period high basicity slag,
Later period lowers basicity) easily cause the white slag time insufficient；VD vacuum refining misoperation easily causes molten steel slag；Its continuous casting uses
Small billet 150mm*150mm rolled wire, center segregation are not easy to control.
Using the method for low alkalinity slag system control non-metallic inclusion, such as Chinese invention patent (authorization publication number
CN040567871B, authorized announcement date 2016.03.09) disclose a kind of spring steel wire production work for controlling field trash
Skill, by steel inclusion denaturation in low alkalinity slag system at low melting point silicate inclusion, but this technique easily causes silicate to press from both sides
Sundries is exceeded, and the patent is not directed to the entire process flow from raw material molten iron to wire rod.
Using the method for high alkalinity slag system control non-metallic inclusion, such as patent of invention (Authorization Notice No.
CN102162068B1, authorized announcement date 2013.07.31) disclose a kind of spring steel and manufacture and heat treatment method, production
Technique: electric furnace-LF-VD- continuous casting-rolling-heat treatment.Basicity of slag control is refined in LF 2.5~3.0, passes through heat treatment process
The intensity of needs can be obtained, still, the high alkalinity refining slag system that basicity is 2.5~3.0 easily leads to B type impurity in steel and is not easy
Removal, influences the fatigue behaviour of spring steel.
Using the process route of BOF+LF+VD+CC, such as patent of invention, (application publication number: CN 106947921A, application are public
Cloth day: 2017.07.14) disclose a kind of high-speed railway spring corrosion-resistant spring steel and its production method.C:0.50~
0.60%, Si:1.4~2.2%, Mn:0.7~1.0%, P:0.015~0.030%, S≤0.015%, Cr:0.36~0.5%, Ni:
0.36~0.60%, Cu:0.26~0.50%, remaining is Fe and inevitable impurity.The invention is using conventional technique, a fire
Becoming a useful person and producing the long material of vertical bar improves the corrosion resistance of steel ontology by rationally adjusting element.
Technology existing for the corrosion-resistant spring steel wire of Rolling Production is smelted for aluminium and silicon manganese dioxidation and low alkalinity slag system to ask
Topic further increases itself corrosion resistance, develops one kind and belong to al-free deoxidation under the premise of ingredient design meets spring Steel Properties
Produce clean steel process, obtain wire rod inherent quality and the excellent full process stream journey of skin decarburization production technology have it is important
Economic benefit and social benefit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of well corrosion-resistant spring steel gren rods of comprehensive performance；Simultaneously
The present invention also provides a kind of production technologies of the well corrosion-resistant spring steel gren rod of comprehensive performance.The invention is directed to aluminium and silicon
Manganese deoxidation and low alkalinity slag system smelt the corrosion-resistant spring steel wire of Rolling Production, meet bullet in ingredient design
Under the premise of spring Steel Properties, in order to further increase itself corrosion resistance, provides one kind and belong to al-free deoxidation production clean steel work
Skill；Comprehensively consider the field trash size and property of gas content and generation, the big square base of continuous casting is become a useful person using breaking down cogging, rolling
Process route, improve disk circle center be segregated rank, bloom cogging and wire rod rolling are all made of unique heating method, pass through
Bloom reconditioning and the cold technology controlling and process of control obtain the production work of wire rod inherent quality and the excellent full process stream journey of skin decarburization
Skill.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of well corrosion-resistant bullet of comprehensive performance
Spring steel gren rod, the spring steel gren rod chemical component composition and its mass percentage are as follows: C:0.40~0.70%,
Si:1.4~1.9%, Mn:0.5~0.8%, P≤0.025%, S:0.002~0.020%, Cr:0.80~1.50%, Ni:0.20~
0.50%, Cu:0.20~0.50%, Nb:0.004~0.020%, Al:0.003~0.010%, remaining for Fe and inevitably it is miscellaneous
Matter.
Spring steel gren rod performance of the present invention, tensile strength >=1779 MPa, yield strength >=1591MPa are broken
Face shrinking percentage >=36%, rate elongation >=6.5% of having no progeny.
Spring steel gren rod spot corrosion voltage >=-0.501V of the present invention, corrosion weight loss≤0.552g.
The present invention also provides a kind of production technology of the well corrosion-resistant spring steel gren rod of comprehensive performance, the springs
Steel gren rod production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process；
The cogging breaking down process, by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is 4~
5h, bringing-up section temperature are 1120~1250 DEG C, and soaking section temperature is 1120~1260 DEG C；The wire rod rolling process, bringing-up section
Temperature is 900~1100 DEG C, and soaking section temperature is 1050~1100 DEG C, and being controlled during wire rod rolling into final rolling temperature is 870
~910 DEG C, control laying temperature is 810~830 DEG C.
Smelting procedure of the present invention, raw materials for metallurgy steel scrap (referring to GB4223 scrap iron and steel) account for the control of feed stock for blast furnace ratio and exist
15~20%, molten iron takes off by pretreatment sulphur to S:0.015~0.030% before smelting；It is smelted using combined blown converter, makes steel terminal C
>=0.08%, it is kept under strict control slag when tapping using the double gears of infrared slide plate+slag retaining cone, using 15~25kg/t steel ferrosilicon precipitation desoxydation, out
When steel 1/2,2.5~3.5kg/t steel lab-prepared refining slag is added along steel stream.
LF refining process of the present invention, using al-free deoxidation, active lime 4.0 is added in LF refining whole process argon bottom-blowing
~6.0kg/t steel, silicon carbide 0.5~1.5kg/t steel diffusive deoxidation are added 0~2.5kg/t of fluorite steel and (use depending on the thick dilute adjustment of slag
Amount), wollastonite 2.5~3.5kg/t steel slag making, finishing slag basicity: 1.5~2.0, Al2O3< 10.0%, carburant carburetting are kept white
Slag time >=20min, electric power feeding time >=30min.
RH application of vacuum process of the present invention, RH application of vacuum vacuum degree≤30Pa, the vacuum retention time 10~
15min, Argon guarantees that liquid steel level is not exposed when vacuum processing, and the soft blow time >=15min closes argon flow valve later,
Sufficient standing is until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient uses the speciality ferrosilicon of 0.5~1.0kg/t steel.
Continuous casting working procedure of the present invention, using 280mm × 380mm square base, crystallizer uses electromagnetic agitation+end slighter compress
Technology, electromagnetic agitation electricity stir electric current 320A, 5HZ, and end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking
Detection controls 15~30 DEG C of the degree of superheat, target superheat degree: T=20 DEG C △, controls 0.60~0.70m/min of pulling rate, target pull rate:
0.65m/min。
Reconditioning process of the present invention carries out reconditioning, unilateral reconditioning quality to 150mm × 150mm bloom using sharpening machine
For 1.0~2.0mm, decarburized layer and surface defect are removed, and to the bloom corner chamfering after reconditioning, 35~55 ° of chamfered edge angle,
Chamfered edge surface width >=5mm.
150mm × 150mm square billet is entered furnace by wire rod rolling process of the present invention, walks steel loading, heating time control using sky
System remaining oxygen≤1.5% in 1.0~1.5h, furnace, control roller table speed use inlet velocity 24m/s, are incremented by step by step later, increase
Width 1.8m/s.
Design of Chemical Composition thinking of the present invention is as follows:
C content control is in C:0.40~0.70%, by reducing carbon content, while meeting spring strength, improves steel itself
Corrosion resistance, to a certain extent improve spring workpiece later period corrosion rate in use adverse effect.The preferred C of the present invention contains
Measure range 0.51~0.60%.
The control of Si content is that spring steel raising bullet subtracts power one of the chief elements in Si:1.4~1.9%, Si.To spring remnants
Deformation qualification plays a major role.The too high precipitation for promoting graphitic carbon in steel of content.The too low raising bullet of content subtracts power and solid solution is strong
Change effect is unobvious.The corrosion resistance that can improve steel is used cooperatively with certain element Cus, P, Cr.The preferred silicon of the present invention 1.45~
1.65%。
0.5~0.8%, the certain harden ability of holding steel exists the control of Mn content it is contemplated that steel grade Cr additional amount improves
Steel rolling is affected to tissue when cooling, and the excessively high easy generation normal segregation of Mn, and Mn element is to the corrosion proof report of raising
Road is fewer, preferred Mn:0.5~0.6% of the present invention.
The control of Cr content is the element that can improve harden ability in 0.80~1.50%, Cr, while Cr can be formed in steel surface
Fine and close oxidation film, improves the passivation ability of steel.Better effect is added in Cr and Cu simultaneously, but the excessively high bullet that can reduce steel of Cr subtracts
Drag.Preferred Cr:0.90~1.0% of the present invention.
In 0.004~0.02%, Nb element, it exists mostly in the form of carbon, nitride the control of Nb content in steel, small
Carbon, nitride can refine crystal grain with pinning crystal boundary.Nb can improve the elevated temperature strength of steel and improve the resistance to corrosion of crystal boundary.This
Preferred Nb content control is invented 0.01~0.02%.
The control of Cu content is to improve the most effective alloying element of steel corrosion resistance in 0.20~0.50%, Cu, moreover it is possible to which reduce sulphur has
Evil effect.In addition Cu and other alloying elements increase rust in the enrichment of rusty scale inner surface (in the interior rusty scale i.e. close to matrix)
The compactness and protectiveness of layer, to improve atmospheric corrosion resistance.But Cu too high levels can cause to occur in grain boundaries
Enrichment and segregation, cause hot-short.Preferred Cu:0.20~0.30% of Cu content of the present invention.
Al content control is 0.003~0.010%, although Al can refine the intensity that crystal grain improves steel, in this programme from
The source consideration that silicon deoxidation control oxide as far as possible is mingled with, Al content of the present invention preferably 0.003~0.008%.
P content is controlled≤0.030%, and phosphorus can accelerate the uniform dissolution and Fe of steel2+Oxidation rate, facilitate steel and exist
Surface forms uniform FeOOH rusty scale, and fine and close oxide layer can be formed with elements such as Cr, Cu.But phosphorus increases the cold short of steel
Property, content cannot be too high, preferred P:0.010~0.025% of this programme.
The control of Ni content shares the corrosion resistance that steel can be improved in 0.20~0.50%, Cu-P-Ni-Cr series elements, can
To reduce the cost of steel, its economy, preferred Ni:0.20~0.30% of Ni content of the present invention are considered.
Process design thinking of the present invention:
Process for making: by molten iron pretreatment by desulfurization to target position 0.015~0.030%, for beating for low alkalinity refining slag desulfurization
Good basis, using ferrosilicon deoxidation, using active lime, silicon carbide diffusive deoxidation is added fluorite is added, wollastonite is made in refining slag system
Slag keeps refining finishing slag moderate alkalinity range (R=1.5~2.0), Al can be controlled from source2O3The generation of field trash.Using
Dedicated carburant and speciality ferrosilicon control nitrogen in steel and Ti content, control the Ds type impurity of molten steel.
Continuous casting process: whole argon gas protects atmosphere, prevents molten steel in the secondary oxidation of continuous casting process, using bale slag-blanking
Detection and mould flux come prevent molten steel be secondarily contaminated with the good effect that is mingled with of heat preservation absorption, using big square base
Crystallizer stirring+slighter compress, and the rolling mill practice of two igneous materials is carried out, wire rod Central Carbon Segregation is effectively controlled, it is final to obtain
Spring steel wire of good performance.Rolling mill practice:
Cogging process uses long-time at elevated temperature, and nickeliferous steel oxidation skin feature not easily to fall off carries out surface to bloom and repairs
After mill, steel loading mode, the heating time of strict control wire rod rolling and rolling rhythm are walked by using sky；Utilize heating furnace thermoelectricity
The residual oxygen instrument of even summation effectively controls in-furnace temperature and heating atmosphere, ensure that the control of spring steel decarburized layer deepness.The operation of rolling
In, by optimizing the control of mill speed and rolling temperature, guarantee the tissue and performance of finished product.
The beneficial effects of adopting the technical scheme are that the 1, present invention is used by molten iron pretreatment desulfurizing
Fluorite, wollastonite slag making is added from source using active lime, silicon carbide diffusive deoxidation is added in ferrosilicon deoxidation, refining slag system
Control the generation of B field trash.2, the present invention uses speciality ferrosilicon, titanium source in steel is controlled, so that the Ds class for controlling molten steel is mingled with
Object.3, the argon gas of continuous casting whole process of the present invention protects atmosphere, prevents molten steel in the secondary oxidation of continuous casting process, is examined using bale slag-blanking
Survey and covering slag come prevent molten steel be secondarily contaminated with the good effect that is mingled with of heat preservation absorption, using big square billet crystallizer
Stirring+slighter compress, and the rolling mill practice of two igneous materials is carried out, wire rod Central Carbon Segregation is effectively controlled, is obtained of good performance
Spring steel wire.4, in the operation of rolling of the present invention, by optimizing the control of mill speed and rolling temperature, guarantee the tissue of finished product
And performance.5, spring is made in the well corrosion-resistant spring steel gren rod of comprehensive performance of the present invention after customer is heat-treated, anti-corrosion
Property especially spot corrosion voltage improve 0.185V or more, have certain promotional value.
Specific embodiment
Present invention will be explained in further detail combined with specific embodiments below.
Embodiment 1
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 16%, and molten iron takes off by pretreatment sulphur to S:0.298% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.10%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
17.3kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.81kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 4.9kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 0.5kg/t steel, wollastonite 3.2kg/t steel slag making, finishing slag basicity: 1.87, Al is added in silicon 0.8kg/t steel diffusive deoxidation2O3:
8.5%, carburant carburetting keeps white slag time 22min, electric power feeding time 32min；
(3) RH application of vacuum process: vacuum degree 25Pa during RH application of vacuum, vacuum retention time 12min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 17min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 0.6kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
23 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4.6h, bringing-up section temperature are 1125 DEG C, and soaking section temperature is 1135 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.2mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 370, chamfered edge surface width 6mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.2h, adds
Hot arc temperature is 920 DEG C, and soaking section temperature is 1070 DEG C, and remaining oxygen 1.2% in furnace controls during wire rod rolling into finish rolling temperature
Degree is 880 DEG C, and control laying temperature is 815 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 2
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 17%, and molten iron takes off by pretreatment sulphur to S:0.026% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.09%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
18.1kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.75kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 5.1kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 0.4kg/t steel, wollastonite 3.5kg/t steel slag making, finishing slag basicity: 1.73, Al is added in silicon 0.9kg/t steel diffusive deoxidation2O3:
9.3 %, carburant carburetting keep white slag time 27min, electric power feeding time 35min；
(3) RH application of vacuum process: vacuum degree 27Pa during RH application of vacuum, vacuum retention time 14min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 18min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 0.8kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
30 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4.5h, bringing-up section temperature are 1130 DEG C, and soaking section temperature is 1140 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.4mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 400, chamfered edge surface width 7mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.3h, adds
Hot arc temperature is 950 DEG C, and soaking section temperature is 1055 DEG C, and remaining oxygen 1.1% in furnace controls during wire rod rolling into finish rolling temperature
Degree is 875 DEG C, and control laying temperature is 820 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 3
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 18%, and molten iron takes off by pretreatment sulphur to S:0.0256% before smelting；
It is smelted using combined blown converter, makes steel terminal C:0.13%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
18.0kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.91kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 5.1kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 0.4kg/t steel, wollastonite 3.5kg/t steel slag making is added, finishing slag basicity in silicon 0.75kg/t steel diffusive deoxidation: 1.68,
Al2O3: 7.8%, carburant carburetting keeps white slag time 30min, electric power feeding time 34min；
(3) RH application of vacuum process: vacuum degree 22Pa during RH application of vacuum, vacuum retention time 13min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 20min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 0.7kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
20 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4.3h, bringing-up section temperature are 1140 DEG C, and soaking section temperature is 1135 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.6mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 450, chamfered edge surface width 8mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.3h, adds
Hot arc temperature is 980 DEG C, and soaking section temperature is 1070 DEG C, remaining oxygen 1.0% in furnace, is controlled during high-speed wire rolling into essence
Rolling temperature is 890 DEG C, and control laying temperature is 820 DEG C, using inlet velocity 24m/s, is incremented by step by step later, amplification 1.8m/s.
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 4
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 19%, and molten iron takes off by pretreatment sulphur to S:0.0277% before smelting；
It is smelted using combined blown converter, makes steel terminal C:0.08%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
25kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.95kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 4.9kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 0.5kg/t steel, wollastonite 3.0kg/t steel slag making, finishing slag basicity: 1.74, Al is added in silicon 0.8kg/t steel diffusive deoxidation2O3:
8.6%, carburant carburetting keeps white slag time 25min, electric power feeding time 40min；
(3) RH application of vacuum process: vacuum degree 24Pa during RH application of vacuum, vacuum retention time 11min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 18min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 1.0kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
28 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4.1h, bringing-up section temperature are 1145 DEG C, and soaking section temperature is 1150 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.8mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 450, chamfered edge surface width 8mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.4h, adds
Hot arc temperature is 1020 DEG C, and soaking section temperature is 1090 DEG C, remaining oxygen 0.9% in furnace, is controlled during high-speed wire rolling into essence
Rolling temperature is 890 DEG C, and control laying temperature is 825 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 5
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 18%, and molten iron takes off by pretreatment sulphur to S:0.0283% before smelting；
It is smelted using combined blown converter, makes steel terminal C:0.10%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
25kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.95kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 4.9kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 0.5kg/t steel, wollastonite 3.2kg/t steel slag making is added, finishing slag basicity in silicon 0.80kg/t steel diffusive deoxidation: 1.65,
Al2O3: 9.1%, carburant carburetting keeps white slag time 33min, electric power feeding time 35min；
(3) RH application of vacuum process: vacuum degree 28Pa during RH application of vacuum, vacuum retention time 13min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 17min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 1.0kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
21 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4.5h, bringing-up section temperature are 1130 DEG C, and soaking section temperature is 1140 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.5mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 450, chamfered edge surface width 6mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.4h, adds
Hot arc temperature is 1060 DEG C, and soaking section temperature is 1080 DEG C, remaining oxygen 1.0% in furnace, is controlled during high-speed wire rolling into essence
Rolling temperature is 900 DEG C, and control laying temperature is 825 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 6
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 15%, and molten iron takes off by pretreatment sulphur to S:0.015% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.08%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
15kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.6kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 6.0kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 1.0kg/t steel, wollastonite 3.5kg/t steel slag making, finishing slag basicity: 1.5, Al is added in silicon 1.0kg/t steel diffusive deoxidation2O3:
9.5%, carburant carburetting keeps white slag time 20min, electric power feeding time 30min；
(3) RH application of vacuum process: vacuum degree 30Pa during RH application of vacuum, vacuum retention time 15min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 15min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 1.0kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
24 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4h, bringing-up section temperature are 1120 DEG C, and soaking section temperature is 1120 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.0mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 350, chamfered edge surface width 5mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time control is in 1h, heating
Duan Wendu is 900 DEG C, and soaking section temperature is 1050 DEG C, remaining oxygen 1.5% in furnace, is controlled during high-speed wire rolling into finish rolling
Temperature is 870 DEG C, and control laying temperature is 810 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 7
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 20%, and molten iron takes off by pretreatment sulphur to S:0.030% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.12%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
23kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.9kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 6.0kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 2.0kg/t steel, wollastonite 3.5kg/t steel slag making, finishing slag basicity: 2.0, Al is added in silicon 0.9kg/t steel diffusive deoxidation2O3:
8%, carburant carburetting keeps white slag time 22min, electric power feeding time 33min；
(3) RH application of vacuum process: vacuum degree 25Pa during RH application of vacuum, vacuum retention time 12min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 18min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 1.0kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
20 DEG C of temperature, control pulling rate 0.65m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
5h, bringing-up section temperature are 1250 DEG C, and soaking section temperature is 1260 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 2.0mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 550, chamfered edge surface width 8mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.5h, adds
Hot arc temperature is 1100 DEG C, and soaking section temperature is 1100 DEG C, remaining oxygen 1.2% in furnace, is controlled during high-speed wire rolling into essence
Rolling temperature is 910 DEG C, and control laying temperature is 830 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 8
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 15%, and molten iron takes off by pretreatment sulphur to S:0.015% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.08%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
25kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 3.5kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 4.6kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Firefly 0kg/t steel, wollastonite 3.1kg/t steel slag making, finishing slag basicity: 1.5, Al is added in silicon 1.5kg/t steel diffusive deoxidation2O3: 9%, increase
Carbon agent carburetting keeps white slag time 20min, electric power feeding time 30min；
(3) RH application of vacuum process: vacuum degree 30Pa during RH application of vacuum, vacuum retention time 10min, when vacuum processing
Argon, the control of argon gas amount carry out flow adjusting according to liquid fluctuating situation, guarantee that liquid steel level is not exposed, soft blow time 15min,
Argon flow valve is closed later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient is used
The speciality ferrosilicon of 0.9kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection, system overheat
27 DEG C of degree controls pulling rate 0.70m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
4h, bringing-up section temperature are 1120 DEG C, and soaking section temperature is 1120 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 1.0mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 350, chamfered edge surface width 5mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time control is in 1h, heating
Duan Wendu is 900 DEG C, and soaking section temperature is 1050 DEG C, remaining oxygen 1.5% in furnace, is controlled during high-speed wire rolling into finish rolling
Temperature is 870 DEG C, and control laying temperature is 810 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
Embodiment 9
The well corrosion-resistant spring steel gren rod chemical component composition of the present embodiment comprehensive performance and mass percentage are shown in Table 1,
Its production technology includes smelting, LF refining, RH application of vacuum, continuous casting, cogging breaking down, reconditioning, wire rod rolling process, concrete technology
It is described that steps are as follows:
(1) smelting procedure: the control of raw materials for metallurgy scrap ratio is 20%, and molten iron takes off by pretreatment sulphur to S:0.030% before smelting；It adopts
It is smelted with combined blown converter, makes steel terminal C:0.12%, kept under strict control slag when tapping, used using the double gears of infrared slide plate+slag retaining cone
25kg/t steel ferrosilicon precipitation desoxydation, tapping 1/2 when, along steel stream be added 2.5kg/t steel lab-prepared refining slag；
(2) LF refining process: using al-free deoxidation, and active lime 4.0kg/t steel, carbonization is added in LF refining whole process argon bottom-blowing
Fluorite 2.5kg/t steel, wollastonite 2.5kg/t steel slag making, finishing slag basicity: 2.0, Al is added in silicon 0.5kg/t steel diffusive deoxidation2O3:
8%, carburant carburetting keeps white slag time 25min, electric power feeding time 36min；
(3) RH application of vacuum process: vacuum degree 25Pa during RH application of vacuum, vacuum retention time 13min, when vacuum processing
Argon is selected, the control of argon gas amount carries out flow adjusting according to liquid fluctuating situation, guarantees that liquid steel level is not exposed, the soft blow time
17min closes argon flow valve later, starts sufficient standing until big packet is opened and poured；During RH application of vacuum, fine tuning silicon at
Divide the speciality ferrosilicon using 0.5kg/t steel；
(4) continuous casting working procedure: using 280mm × 380mm square base, and crystallizer uses electromagnetic agitation+end soft reduction technique, and electromagnetism stirs
It mixes electricity and stirs electric current 320A, 5HZ, end slighter compress uses high-carbon steel mode；Whole argon gas protection, bale slag-blanking detection controlled
15 DEG C of temperature, control pulling rate 0.60m/min；
(5) cogging breaking down process: by 280mm × 380mm square base split rolling method at 150mm × 150mm square billet, heating time is
5h, bringing-up section temperature are 1250 DEG C, and soaking section temperature is 1260 DEG C；
(6) reconditioning process: reconditioning is carried out to 150mm × 150mm bloom using sharpening machine, unilateral reconditioning quality is 2.0mm, removal
Decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 550, chamfered edge surface width 10mm；
(7) wire rod rolling process: entering furnace for 150mm × 150mm square billet, walks steel loading using sky, heating time controls in 1.5h, adds
Hot arc temperature is 1100 DEG C, and soaking section temperature is 1100 DEG C, remaining oxygen 1.0% in furnace, is controlled during high-speed wire rolling into essence
Rolling temperature is 910 DEG C, and control laying temperature is 830 DEG C, and roller table speed uses inlet velocity 24m/s, is incremented by step by step later, amplification
1.8m/s。
The degree of purity index of the well corrosion-resistant spring steel gren rod of the present embodiment comprehensive performance is shown in Table 2, and center segregation refers to
Mark is shown in Table 3, and mechanical performance index is shown in Table 4, and corrosion resistance is shown in Table 5, and performance is shown in Table 6 after spring is made.
The steel chemical composition comparison (%) compared with of the well corrosion-resistant spring steel hot rolling disk of 1 embodiment 1-9 comprehensive performance of table
Ingredient surplus is Fe and inevitable impurity in table 1.
The well corrosion-resistant spring steel gren rod degree of purity index of 2 embodiment 1-9 comprehensive performance of table
The well corrosion-resistant spring steel gren rod center segregation index of 3 embodiment 1-9 comprehensive performance of table
The well corrosion-resistant spring steel gren rod steel mechanical property index compared with of 4 embodiment 1-9 comprehensive performance of table
The well corrosion-resistant spring steel gren rod steel corrosion resistance compared with of 5 embodiment 1-9 comprehensive performance of table compares
The well corrosion-resistant spring steel gren rod of 6 embodiment 1-9 comprehensive performance of table and compare the ratio that performance after spring is made in steel sample
Compared with
Above-described embodiment and result of implementation show that the corrosion-resistant spring steel gren rod comprehensive performance of the method for the present invention production is good
It is good, spring is after heat treatment made, corrosion resistance especially spot corrosion voltage improves 0.185V or more.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (10)
1. a kind of well corrosion-resistant spring steel gren rod of comprehensive performance, which is characterized in that the spring steel gren rod chemistry
At being grouped as and its mass percentage are as follows: C:0.40~0.70%, Si:1.4~1.9%, Mn:0.5~0.8%, P≤0.025%,
S:0.002~0.020%, Cr:0.80~1.50%, Ni:0.20~0.50%, Cu:0.20~0.50%, Nb:0.004~
0.020%, Al:0.003~0.010%, remaining is Fe and inevitable impurity.
2. a kind of well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 1, which is characterized in that described
Spring steel gren rod performance, tensile strength >=1779 MPa, yield strength >=1591MPa, the contraction percentage of area >=36% are had no progeny
Rate elongation >=6.5%.
3. a kind of well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 1, which is characterized in that described
Spring steel gren rod spot corrosion voltage >=-0.501V, corrosion weight loss≤0.552g.
4. the production based on a kind of well corrosion-resistant spring steel gren rod of comprehensive performance described in claim 1-3 any one
Technique, which is characterized in that the spring steel gren rod production technology includes smelting, LF refining, RH application of vacuum, continuous casting, opens
Base breaking down, reconditioning, wire rod rolling process；The cogging breaking down process, by 280mm × 380mm square base split rolling method at 150mm ×
150mm square billet, heating time are 4~5h, and bringing-up section temperature is 1120~1250 DEG C, and soaking section temperature is 1120~1260 DEG C；
The wire rod rolling process, bringing-up section temperature are 900~1100 DEG C, and soaking section temperature is 1050~1100 DEG C, wire rod rolling
Being controlled in journey into final rolling temperature is 870~910 DEG C, and control laying temperature is 810~830 DEG C.
5. a kind of production technology of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4, special
Sign is that the smelting procedure, raw materials for metallurgy steel scrap accounts for the control of feed stock for blast furnace ratio 15~20%, and molten iron is by pre- before smelting
Processing sulphur takes off to S:0.015~0.030%；It is smelted using combined blown converter, makes steel terminal C >=0.08%, infrared cunning is used when tapping
The double gears of plate+slag retaining cone are kept under strict control slag, using 15~25kg/t steel ferrosilicon precipitation desoxydation, when tapping 1/2,2.5 are added along steel stream~
3.5kg/t steel lab-prepared refining slag.
6. a kind of production technology of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4, special
Sign is that the LF refining process, using al-free deoxidation, 4.0~6.0kg/ of active lime is added in LF refining whole process argon bottom-blowing
0~2.5kg/t of fluorite steel is added in t steel, silicon carbide 0.5~1.5kg/t steel diffusive deoxidation, wollastonite 2.5~3.5kg/t steel is made
Slag, finishing slag basicity: 1.5~2.0, Al2O3< 10.0%, carburant carburetting, holding white slag time >=20min, electric power feeding time >=
30min。
7. a kind of production of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4-6 any one
Technique, which is characterized in that the RH application of vacuum process, RH application of vacuum vacuum degree≤30Pa, the vacuum retention time 10~
15min, Argon guarantees that liquid steel level is not exposed when vacuum processing, and the soft blow time >=15min closes argon flow valve later,
Sufficient standing is until big packet is opened and poured；During RH application of vacuum, fine tuning silicon ingredient uses the speciality ferrosilicon of 0.5~1.0kg/t steel.
8. a kind of production of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4-6 any one
Technique, which is characterized in that the continuous casting working procedure, using 280mm × 380mm square base, crystallizer is gently pressed using electromagnetic agitation+end
Lower technology, electromagnetic agitation electricity stir electric current 320A, 5HZ, and end slighter compress uses high-carbon steel mode；Whole argon gas protection, greatly under packet
Slag detection, controls 15~30 DEG C of the degree of superheat, target superheat degree: T=20 DEG C △, and control 0.60~0.70m/min of pulling rate, target are drawn
Speed: 0.65m/min.
9. a kind of production of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4-6 any one
Technique, which is characterized in that the reconditioning process carries out reconditioning, unilateral reconditioning to 150mm × 150mm bloom using sharpening machine
Amount is 1.0~2.0mm, removes decarburized layer and surface defect, and to the bloom corner chamfering after reconditioning, chamfered edge angle 35~
55 °, chamfered edge surface width >=5mm.
10. a kind of life of the well corrosion-resistant spring steel gren rod of comprehensive performance according to claim 4-6 any one
Production. art, which is characterized in that 150mm × 150mm square billet is entered furnace by the wire rod rolling process, steel loading is walked using sky, when heating
Between control in 1.0~1.5h, furnace remaining oxygen≤1.5%, control roller table speed use inlet velocity 24m/s, pass step by step later
Increase, amplification 1.8m/s.
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