CN107012401A - A kind of low-carbon ferrite soft-magnetic stainless steel and its production method - Google Patents
A kind of low-carbon ferrite soft-magnetic stainless steel and its production method Download PDFInfo
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- CN107012401A CN107012401A CN201710225304.1A CN201710225304A CN107012401A CN 107012401 A CN107012401 A CN 107012401A CN 201710225304 A CN201710225304 A CN 201710225304A CN 107012401 A CN107012401 A CN 107012401A
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 51
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 46
- 239000010935 stainless steel Substances 0.000 title claims abstract description 42
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000010959 steel Substances 0.000 claims abstract description 86
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 229910052742 iron Inorganic materials 0.000 claims abstract description 49
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 238000009749 continuous casting Methods 0.000 claims abstract description 34
- 238000003723 Smelting Methods 0.000 claims abstract description 24
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 16
- 238000007670 refining Methods 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 69
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 35
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 26
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 20
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 14
- 238000005275 alloying Methods 0.000 claims description 13
- 229910052786 argon Inorganic materials 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 13
- 238000010583 slow cooling Methods 0.000 claims description 13
- 239000011651 chromium Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005261 decarburization Methods 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 7
- 238000009966 trimming Methods 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 229910000640 Fe alloy Inorganic materials 0.000 claims 1
- 238000013019 agitation Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000000470 constituent Substances 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 11
- 238000000137 annealing Methods 0.000 description 11
- 238000005554 pickling Methods 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 235000012721 chromium Nutrition 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910001325 element alloy Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 150000003464 sulfur compounds Chemical class 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
- C22C38/18—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of low-carbon ferrite soft-magnetic stainless steel and its production method, the steel grade chemical composition and weight/mass percentage composition are：C≤0.03%, Si：2.5 3.5%, Mn≤0.5%, P ＜ 0.03%, S ＜ 0.03%, Cr：13.5 15.0%, Ni≤0.6%, Mo：0.2 0.7%, V≤0.15%, Ti≤0.1%, N ＜ 0.020%, surplus is Fe and inevitable impurity element.Production method of the present invention includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting.Product has good corrosion resisting property, greatly expands the use category of soft magnetic products, reduces frequently pollution of the processing to environment.C content is further reduced in ferritic stainless steel, Si constituent contents are improved, improves material weldability and soft magnet performance, for making the electromagnetic valve components in vehicle ABS control and household electrical appliance.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to a kind of low-carbon ferrite soft-magnetic stainless steel and its producer
Method.
Background technology
Conventional magnetic material pure iron or silicon steel need to carry out top layer plating after component is processed into improve its corrosion resistance
Processing, this had both added cost or pollution can be produced to environment, therefore using the good corrosion resistance of stainless steel, carried out soft magnetism stainless
The research of steel seems very necessary.
The special 00Cr13Si2MoAl soft-magnetic chromiums stainless alloy material volume of number of patent application CN200910116915.8-welding
Preparation technology, the technique adds the elements such as a certain amount of Si, Al, not leaded, sulfur compound and alumina type it is nonmetallic
Inclusion content requirement is below 1 grade, and production process is three smelters of " intermediate frequency furnace-AOD furnace refining-electroslag remelting "
Skill, is made after 200-300kg steel ingot and pulls into strip through forging aligning, properties of product meet client and used；Number of patent application
CN200410025650.8-magnetic valve stainless steel core iron and preparation method thereof, the technique is added a certain amount of in ferritic steel
Si elements improve electromagnetically, and strand, section bar needed for forged, hot rolling (or cold rolling) is obtained, type are produced using conventional casting methods
Material is last with higher than 800 DEG C annealing temperatures, with good anti-corrosion, soft magnet performance.But there is presently no on a kind of Low Carbon Iron
The research of ferritic soft-magnetic stainless steel and its production method.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of low-carbon ferrite soft-magnetic stainless steel, present invention also offers one
Plant the production method of low-carbon ferrite soft-magnetic stainless steel.C in main optimization ferritic stainless steel finished product composition of the invention, reduction steel
Content, makes product be used available for welding；Improve steel in Si contents make it have it is good electromagnetically.
In order to solve the above technical problems, the present invention provides a kind of low-carbon ferrite soft-magnetic stainless steel, the steel grade chemistry into
Divide and weight/mass percentage composition is：C≤0.03%, Si：2.5-3.5%, Mn≤0.5%, P ＜ 0.03%, S ＜ 0.03%, Cr：13.5-
15.0%, Ni≤0.6%, Mo：0.2-0.7%, V≤0.15%, Ti≤0.1%, N ＜ 0.020%, surplus are Fe and inevitably miscellaneous
Prime element.
Present invention also offers a kind of production method of low-carbon ferrite soft-magnetic stainless steel, the production method includes molten iron
Dephosphorization, AOD furnace are smelted, LF stoves are refined, continuous casting working procedure.
Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron process of the present invention, dephosphorization molten iron：C≥
3.0%, Si≤0.02%, P≤0.03%, 1250 DEG C of molten iron temperature ＞.
AOD furnace smelting procedure of the present invention, dephosphorization molten iron is calculated by 40-50 tons of charge weights, and tap is based on 57-60 tons
Calculate, top gun oxygen pressure scope is 6-17bar, it is 55-57.9m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, Ar Pressure
Power scope is 3-19bar.
In AOD furnace smelting procedure of the present invention, smelting process, it is separately added into ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying,
Wherein ferrochrome addition is 281-300kg/ tons of steel (chromium absorptivity is 96.5%), and ferrosilicon addition is that (silicon is comprehensive for 55-70kg/ tons of steel
Absorptivity is closed for 85%), molybdenum-iron addition is 3.5-5kg/ tons of steel (molybdenum absorptivity is 99%), and nickel plate addition is 2-2.5kg/ tons
Steel (nickel absorptivity be 99%), slag basicity R scopes are 1.7-2.0, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out
Chromium oxide is reduced and element silicon alloying.
LF stoves refining procedure of the present invention, AOD molten steel is blended into LF stoves, adds a certain amount of low-carbon ferrochromium, ferrochrome, nickel
Plate and ferro-molybdenum carry out trimming, and basicity R scopes are 2.3-2.6, and before upper machine casting, the argon bottom-blowing time answers >=12min,
Steel inclusion is set fully to float, upper machine cast temperature is 1605-1625 DEG C.
Continuous casting working procedure of the present invention, steel grade liquidus temperature is 1485 DEG C, and first stove tundish temperature control range is 1520-
1535 DEG C, casting speed control 1.05-1.15m/min, non-first stove tundish temperature control range is 1515-1530 DEG C, casting speed control
1.05-1.15m/min。
Continuous casting working procedure of the present invention, crystallizer water 1500-1600L/min, M-EMS Current 360-
370A, 4.0 ± 0.5Hz of M-EMS frequency.
Continuous casting working procedure of the present invention, weak intensity is cooled down during two cold stages used, and the two cold areas of stage one are controlled per streamflow
In 180~200L/min, 2nd area are controlled per streamflow in 150~180L/min, and 3rd area are controlled in 100~120L/ per streamflow
min。
Retarded cooling process is after continuous casting working procedure of the present invention, steel billet straightening, is annealed using van-type heating furnace, opens and adds
The maximum heating ability of hot stove, rises to 500 ± 10 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after 60 ± 5min of insulation,
Stop insulation, by door opened 5-10cm, when temperature is down to 400 ± 10 DEG C by door opened to 15-20cm, when temperature is down to
Fire door is all turned at 250 ± 10 DEG C, when temperature is down to below 100 ± 10 DEG C, heating furnace chassis is outputed and is air-cooled to room
Temperature, terminates slow cooling.
The mentality of designing of the present invention is as follows：Dephosphorization molten iron containing compared with low phosphorus content, is respectively blown the stage by AOD refining furnaces
The reasonable set of ratio of gas mixture, carries out decarburization and cr yield and heating treatment to greatest extent, while adding to enter compared with stable element
Row molten steel alloying, reduction period adds a certain amount of ferrosilicon and carries out Cr in slag2O3Reduction, further improves yield of alloy, LF stove smeltings
Refining process is finely tuned and temperature control by alloying element, is that follow-up casting steel billet is ready, because of the steel grade in casting process
Containing compared with high Si content, reducing the toughness and plasticity of steel billet, therefore two cold stages need to be using weak cold operation, to mitigate steel billet planted agent
Power, while steel billet carries out slow cooling processing by being needed after straightening section.
Welding position Cr can be reduced by reducing C, N element content in steelx(C、N)yRatio, improves welding region corrosion resistance, protects
Demonstrate,prove the good welding performance of product；Steel grade Si constituent contents are improved, carbon can be made to be easy to graphitization, separately with Precipitation carbide
On the one hand, carbon, oxygen, nitrogen magnetic aging phenomenon caused by precipitation in ferrite are reduced, improves product magnetic property.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, present invention generally provides a kind of low-carbon soft magnetism is stainless
The production method of steel, product has good corrosion resisting property, and being not required to electroplating processes can use in rugged environment, greatly expands
The use category of soft magnetic products is filled, frequently pollution of the processing to environment is reduced.2nd, further reduction C contains in ferritic stainless steel
Amount, improves Si constituent contents, improves material weldability and soft magnet performance, and product is used to make vehicle ABS control and household electrical appliance
In electromagnetic valve components.
Brief description of the drawings
Continuous casting steel billet macrostructure figure in Fig. 1 embodiments 1；
Low-carbon ferrite soft-magnetic stainless steel metallographic structure figure in Fig. 2 embodiments 1.
Embodiment
Embodiment 1
Low-carbon ferrite soft-magnetic stainless steel chemical composition and production method are as follows:
Low-carbon ferrite soft-magnetic stainless steel chemical composition and weight/mass percentage composition：C：0.02%, Si：2.7%, Mn：0.35%, P：
0.018%, S：0.01%, Cr：13.9%, Ni：0.2%, Mo：0.25%, V：0.08%, Ti：0.10%, N：0.019%, surplus be Fe and
Inevitable impurity element.
Low-carbon ferrite soft-magnetic stainless steel production method includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting, rolled
System, annealing, pickling process, are comprised the following steps that：
1) dephosphorization of molten iron process：Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron processing, dephosphorization molten iron：C：
3.2%, Si：0.015%, P：0.015%, 1260 DEG C of molten iron temperature.
2) AOD furnace smelting procedure：
Dephosphorization molten iron is blended into AOD furnace, dephosphorization molten iron is calculated by 43 tons of charge weights, tap is by 57.1 tons of calculating, top gun oxygen
Atmospheric pressure scope is 15bar, and it is 57.1m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, argon pressure scope are 17bar.
In AOD furnace smelting process, it is separately added into the alloys such as ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition
For kg/ tons of steel of 285kg, ferrosilicon addition is 58kg/ tons of steel, about 3.9kg/ tons of steel of molybdenum-iron addition, and nickel plate addition is
2.1kg/ tons of steel, slag basicity R scopes are 1.8, during carry out decarburization and cr yield, reduction period add ferrosilicon carry out chromium oxide reduction and
Element silicon alloying.
3) LF stoves refining procedure：
AOD molten steel is blended into LF stoves, the alloys such as a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron is added and carries out trimming,
Argon bottom-blowing time 13min before upper machine casting, steel inclusion is set fully to float, basicity R is 2.35, upper machine cast temperature is
1615℃。
4) continuous casting working procedure：
Steel grade liquidus temperature is 1485 DEG C, and tundish temperature control range is 1522-1528 DEG C, casting speed control 1.1m/min.Knot
Brilliant device water 1585L/min, M-EMS Current 370A, M-EMS frequency 4.2Hz.Two cold stages used
Middle weak intensity cooling, the two cold areas of stage one are controlled per streamflow in 195L/min, and 2nd area are controlled in 168L/min, three per streamflow
Area is controlled in 105L/min per streamflow.
Slow cooling is needed after steel billet straightening, retarded cooling process is to be annealed using van-type heating furnace, open heating furnace maximum heating
Ability, rises to 490 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after insulation 55min, stops insulation, will be door opened
Fire door, is all turned on to 15cm by door opened when temperature is down to 390 DEG C, works as temperature by 5cm when temperature is down to 240 DEG C
When being down to less than 90 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, terminate slow cooling.
5) continuous casting billet obtains low-carbon ferrite soft-magnetic stainless steel through rolling, annealing, pickling process processing.
Embodiment 2
Low-carbon ferrite soft-magnetic stainless steel chemical composition and production method are as follows:
Low-carbon ferrite soft-magnetic stainless steel chemical composition and weight/mass percentage composition：C：0.02%, Si：2.85%, Mn：0.27%, P：
0.016%, S：0.01%, Cr：14.00%, Ni：0.24%, Mo：0.24%, V：0.15%, Ti：0.04%, N：0.015%, surplus is Fe
With inevitable impurity element.
Low-carbon ferrite soft-magnetic stainless steel production method includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting, rolled
System, annealing, pickling process, are comprised the following steps that：
1) dephosphorization of molten iron process：Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron processing, dephosphorization molten iron：C：
3.1%, Si：0.018%, P：0.015%, 1265 DEG C of molten iron temperature.
2) AOD furnace smelting procedure：
Dephosphorization molten iron is blended into AOD furnace, dephosphorization molten iron is calculated by 47 tons of charge weights, tap is by 59.5 tons of calculating, top gun oxygen
Atmospheric pressure scope is 11bar, and it is 56.3m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, argon pressure scope are 12bar.
In AOD furnace smelting process, it is separately added into the alloys such as ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition
For 287kg/ tons of steel, about 60kg/ tons of steel of ferrosilicon addition, molybdenum-iron addition is 3.8kg/ tons of steel, and nickel plate addition is 2.2kg/
Ton steel, slag basicity R scopes are 1.82, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out chromium oxide reduction and silicon member
Element alloy.
3) LF stoves refining procedure：
AOD molten steel is blended into LF stoves, the alloys such as a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron is added and carries out trimming,
Argon bottom-blowing time 14min before upper machine casting, steel inclusion is set fully to float, basicity R is 2.45, upper machine cast temperature is
1610℃。
4) continuous casting working procedure：
Steel grade liquidus temperature is 1485 DEG C, and first stove tundish temperature control range is 1520-1529 DEG C, casting speed control 1.15m/
min.Crystallizer water 1570L/min, M-EMS Current 360A, M-EMS frequency 3.8Hz.Two cold ranks
Weak intensity is cooled down in Duan Caiyong, and the two cold areas of stage one are controlled per streamflow in 185L/min, and 2nd area are controlled in 165L/ per streamflow
Min, 3rd area are controlled in 115L/min per streamflow.
Slow cooling is needed after steel billet straightening, retarded cooling process is to be annealed using van-type heating furnace, open heating furnace maximum heating
Ability, rises to 510 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after insulation 65min, stops insulation, will be door opened
Fire door, is all turned on to 20cm by door opened when temperature is down to 410 DEG C, works as temperature by 10cm when temperature is down to 260 DEG C
When being down to less than 110 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, terminate slow cooling.
5) continuous casting billet obtains low-carbon ferrite soft-magnetic stainless steel through rolling, annealing, pickling process processing.
Embodiment 3
Low-carbon ferrite soft-magnetic stainless steel chemical composition and production method are as follows:
Low-carbon ferrite soft-magnetic stainless steel chemical composition and weight/mass percentage composition：C：0.030%, Si：2.50%, Mn：0.50%, P：
0.014%, S：0.01%, Cr：13.50%, Ni：0.23%, Mo：0.24%, V：0.08%, Ti：0.06%, N：0.17%, surplus is Fe
With inevitable impurity element
Low-carbon ferrite soft-magnetic stainless steel production method includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting, rolls, moves back
Fire, pickling process, are comprised the following steps that：
1) dephosphorization of molten iron process：Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron processing, dephosphorization molten iron：C：
3.3%, Si：0.017%, P：0.012%, 1255 DEG C of molten iron temperature.
2) AOD furnace smelting procedure：
Dephosphorization molten iron is blended into AOD furnace, dephosphorization molten iron is calculated by 46 tons of charge weights, tap is by 59 tons of calculating, top gun oxygen
Pressure limit is 8bar, and it is 55.9m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, argon pressure scope are 9ba.
In AOD furnace smelting process, it is separately added into the alloys such as ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition
For 290kg/ tons of steel, ferrosilicon addition is 61kg/ tons of steel, and molybdenum-iron addition is 3.8kg/ tons of steel, and nickel plate addition is 2.2kg/
Ton steel, slag basicity R scopes are 1.87, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out chromium oxide reduction and silicon member
Element alloy.
3) LF stoves refining procedure：
AOD molten steel is blended into LF stoves, the alloys such as a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron is added and carries out trimming,
Argon bottom-blowing time 13min before upper machine casting, steel inclusion is set fully to float, basicity R is 2.55, upper machine cast temperature is
1619℃。
4) continuous casting working procedure：
Steel grade liquidus temperature is 1485 DEG C, and first stove tundish temperature control range is 1526-1535 DEG C, casting speed control 1.05m/
min.Crystallizer water 1550L/min, M-EMS Current 365A, M-EMS frequency 4.0Hz.Two cold ranks
Weak intensity is cooled down in Duan Caiyong, and the two cold areas of stage one are controlled per streamflow in 190L/min, and 2nd area are controlled in 160L/ per streamflow
Min, 3rd area are controlled in 110L/min per streamflow.
Slow cooling is needed after steel billet straightening, retarded cooling process is to be annealed using van-type heating furnace, open heating furnace maximum heating
Ability, rises to 500 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after insulation 1h, stops insulation, will be door opened
Fire door, is all turned on to 15cm by door opened when temperature is down to 400 DEG C, works as temperature by 5cm when temperature is down to 250 DEG C
When being down to less than 100 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, terminate slow cooling.
5) continuous casting billet obtains low-carbon ferrite soft-magnetic stainless steel through rolling, annealing, pickling process processing.
Embodiment 4
Low-carbon ferrite soft-magnetic stainless steel chemical composition and production method are as follows:
Low-carbon ferrite soft-magnetic stainless steel chemical composition and weight/mass percentage composition：C：0.025%, Si：2.75%, Mn：0.32%, P：
0.021%, S：0.015%, Cr：13.5%, Ni：0.6%, Mo：0.20%, V：0.15%, Ti：0.1%, N：0.019%, surplus be Fe and
Inevitable impurity element.
Low-carbon ferrite soft-magnetic stainless steel production method includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting, rolled
System, annealing, pickling process, are comprised the following steps that：
1) dephosphorization of molten iron process：Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron processing, dephosphorization molten iron：C：
3.25%, Si：0.016%, P：0.011%, molten iron temperature：1253℃.
2) AOD furnace smelting procedure：
Dephosphorization molten iron is blended into AOD furnace, dephosphorization molten iron is calculated by 45 tons of charge weights, tap is by 57 tons of calculating, top gun oxygen
Pressure limit is 6bar, and it is 55m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, argon pressure scope are 3bar.
In AOD furnace smelting process, it is separately added into the alloys such as ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition
For 281kg/ tons of steel, ferrosilicon addition is 55kg/ tons of steel, and molybdenum-iron addition is 3.5kg/ tons of steel, and nickel plate addition is 2.0kg/
Ton steel, slag basicity R is 1.7, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out chromium oxide reduction and element silicon alloy
Change.
3) LF stoves refining procedure：
AOD molten steel is blended into LF stoves, the alloys such as a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron is added and carries out trimming,
Argon bottom-blowing time 15min before upper machine casting, steel inclusion is set fully to float, basicity R is 2.3, upper machine cast temperature is
1605℃。
4) continuous casting working procedure：
Steel grade liquidus temperature is 1485 DEG C, and tundish temperature control is 1515-1524 DEG C, casting speed control 1.05m/min.Crystallizer
Water 1500L/min, M-EMS Current 367A, M-EMS frequency 4.5Hz.It is weak in two cold stages uses
Intensity is cooled down, and the two cold areas of stage one are controlled per streamflow in 180L/min, and 2nd area are controlled in 150L/min per streamflow, and 3rd area are every
Streamflow is controlled in 100L/min.
Slow cooling is needed after steel billet straightening, retarded cooling process is to be annealed using van-type heating furnace, open heating furnace maximum heating
Ability, rises to 495 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after insulation 58min, stops insulation, will be door opened
Fire door, is all turned on to 18cm by door opened when temperature is down to 395 DEG C, works as temperature by 7cm when temperature is down to 245 DEG C
When being down to less than 95 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, terminate slow cooling.
5) continuous casting billet obtains low-carbon ferrite soft-magnetic stainless steel through rolling, annealing, pickling process processing.
Embodiment 5
Low-carbon ferrite soft-magnetic stainless steel chemical composition and production method are as follows:
Low-carbon ferrite soft-magnetic stainless steel chemical composition and weight/mass percentage composition：C：0.015%, Si：3.50%, Mn：0.37%, P：
0.019%, S：0.023%, Cr：15.0%, Ni：0.42%, Mo：0.70%, V：0.11%, Ti：0.07%, N：0.012%, surplus is Fe
With inevitable impurity element.
Low-carbon ferrite soft-magnetic stainless steel production method includes dephosphorization of molten iron, AOD furnace smelting, the refining of LF stoves, continuous casting, rolled
System, annealing, pickling process, are comprised the following steps that：
1) dephosphorization of molten iron process：Main chemical compositions and weight/mass percentage composition are in dephosphorization of molten iron processing, dephosphorization molten iron：C：
3.0%, Si：0.02%, P：0.016%, molten iron temperature：1261℃.
2) AOD furnace smelting procedure：
Dephosphorization molten iron is blended into AOD furnace, dephosphorization molten iron is calculated by 47 tons of charge weights, tap is by 60 tons of calculating, top gun oxygen
Pressure limit is 17bar, and it is 57.9m to carry top gun blowing oxygen quantity before rifle3/ ton steel, side rifle oxygen, argon pressure scope are 19bar.
In AOD furnace smelting process, it is separately added into the alloys such as ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition
For 300kg/ tons of steel, ferrosilicon addition is 70kg/ tons of steel, and molybdenum-iron addition is 5.0kg/ tons of steel, and nickel plate addition is 2.5kg/
Ton steel, slag basicity R is 2.0, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out chromium oxide reduction and element silicon alloy
Change.
3) LF stoves refining procedure：
AOD molten steel is blended into LF stoves, the alloys such as a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron is added and carries out trimming,
Argon bottom-blowing 12min before upper machine casting, makes steel inclusion fully float, and basicity R is 2.6, and upper machine cast temperature is 1625 DEG C.
4) continuous casting working procedure：
Steel grade liquidus temperature is 1485 DEG C, and tundish temperature control is 1521-1530 DEG C, casting speed control 1.15m/min.Crystallizer
Water 1600L/min, M-EMS Current 368A, M-EMS frequency 3.5Hz.It is weak in two cold stages uses
Intensity is cooled down, and the two cold areas of stage one are controlled per streamflow in 200L/min, and 2nd area are controlled in 180L/min per streamflow, and 3rd area are every
Streamflow is controlled in 120L/min.
Slow cooling is needed after steel billet straightening, retarded cooling process is to be annealed using van-type heating furnace, open heating furnace maximum heating
Ability, rises to 505 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after insulation 62min, stops insulation, will be door opened
Fire door, is all turned on to 15cm by door opened when temperature is down to 405 DEG C, works as temperature by 9cm when temperature is down to 255 DEG C
When being down to less than 105 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, terminate slow cooling.
5) continuous casting billet obtains low-carbon ferrite soft-magnetic stainless steel through rolling, annealing, pickling process processing.
Steel billet carries out magnetic performance testing in various embodiments of the present invention, and assay is shown in Table 1.
Brief description of the drawings：
As seen in Figure 1, inside steel billet equiax crystal accounting is larger, and there is certain thickness chill in outside, is follow-up roll line
The superperformance of material is laid a good foundation.
Fig. 2 is low-carbon ferrite soft-magnetic stainless steel wire rod metallographic structure figure, and internal grain size is more uniform, and intra-die is bright
It is aobvious to find out there is more carbonitride, analyze and combined to form for micro alloying element with carbon nitrogen in steel, can be prevented in annealing process
The undue of crystal grain is grown up, it is ensured that the superperformance of material, remaining embodiment accompanying drawing is identical, is omitted.
Steel billet magnetic performance testing result in each embodiment of table 1
Above example is only used to illustrative and not limiting technical scheme, although entering with reference to above-described embodiment to the present invention
Go detailed description, it will be understood by those within the art that：Still the present invention can be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask among scope.
Claims (10)
1. a kind of low-carbon ferrite soft-magnetic stainless steel, it is characterised in that the steel grade chemical composition and weight/mass percentage composition are：C
≤ 0.03%, Si：2.5-3.5%, Mn≤0.5%, P ＜ 0.03%, S ＜ 0.03%, Cr：13.5-15.0%, Ni≤0.6%, Mo：0.2-
0.7%, V≤0.15%, Ti≤0.1%, N ＜ 0.020%, surplus are Fe and inevitable impurity element.
2. based on a kind of production method of low-carbon ferrite soft-magnetic stainless steel described in claim 1, the production method includes
Dephosphorization of molten iron, AOD furnace are smelted, LF stoves are refined, continuous casting working procedure.
3. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 1, it is characterised in that the iron
Main chemical compositions and weight/mass percentage composition are in water dephosphorization process, dephosphorization molten iron：C >=3.0%, Si≤0.02%, P≤0.03%,
1250 DEG C of molten iron temperature ＞.
4. the production method of a kind of low-carbon ferrite soft-magnetic stainless steel according to claim 1, it is characterised in that described
AOD furnace smelting procedure, top gun oxygen pressure scope is 6-17bar, carries top gun blowing oxygen quantity about 55-57.9m before rifle3/ ton steel, side rifle
Oxygen, argon pressure scope are 3-19bar.
5. the production method of a kind of low-carbon ferrite soft-magnetic stainless steel according to claim 1, it is characterised in that described
In AOD furnace smelting procedure, smelting process, it is separately added into ferrochrome, ferrosilicon, molybdenum-iron and carries out alloying, wherein ferrochrome addition is
281-300kg/ tons of steel, ferrosilicon addition is 55-70kg/ tons of steel, and molybdenum-iron addition is 3.5-5kg/ tons of steel, and nickel plate addition is
2-2.5kg/ tons of steel, slag basicity R scopes are 1.7-2.0, during carry out decarburization and cr yield, reduction period adds ferrosilicon to carry out chromium oxide
Reduction and element silicon alloying.
6. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 2-5 any one, its feature
It is that AOD molten steel is blended into LF stoves by the LF stoves refining procedure, adds a certain amount of low-carbon ferrochromium, ferrochrome, nickel plate and molybdenum-iron
Alloy carries out trimming, and basicity R scopes are 2.3-2.6, and before upper machine casting, the argon bottom-blowing time answers >=12min, makes to press from both sides in steel
Debris fully floats, and upper machine cast temperature is 1605-1625 DEG C.
7. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 2-5 any one, its feature
It is, the continuous casting working procedure, steel grade liquidus temperature is 1485 DEG C, first stove tundish temperature control range is 1520-1535 DEG C, is drawn
Speed control 1.05-1.15m/min, non-first stove tundish temperature control range is 1515-1530 DEG C, casting speed control 1.05-1.15m/
min。
8. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 2-5 any one, its feature
It is, the continuous casting working procedure, crystallizer water is 1500-1600L/min, and M-EMS Current is 360-370A, knot
Brilliant device electromagnetic agitation frequency is 4.0 ± 0.5Hz.
9. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 2-5 any one, its feature
It is, the continuous casting working procedure, weak intensity is cooled down during two cold stages used, the two cold areas of stage one control per streamflow 180~
200L/min, 2nd area are controlled per streamflow in 150~180L/min, and 3rd area are controlled in 100~120L/min per streamflow.
10. a kind of production method of low-carbon ferrite soft-magnetic stainless steel according to claim 2-5 any one, its feature
It is, the continuous casting working procedure, retarded cooling process is after steel billet straightening, is annealed using van-type heating furnace, opens heating furnace maximum
Heating ability, rises to 500 ± 10 DEG C by in-furnace temperature, continuous casting billet is put into heating furnace, after 60 ± 5min of insulation, stops protecting
Temperature, by door opened 5-10cm, when temperature is down to 400 ± 10 DEG C by door opened to 15-20cm, 250 are down to when temperature ±
Fire door is all turned at 10 DEG C, when temperature is down to below 100 ± 10 DEG C, heating furnace chassis is outputed and is air-cooled to room temperature, is tied
Beam slow cooling.
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| CN110592494A (en) * | 2019-09-24 | 2019-12-20 | 王平 | Nickel-containing ferrite stainless steel smelted from laterite-nickel ore and preparation method thereof |
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| CN113355484A (en) * | 2021-06-08 | 2021-09-07 | 山西太钢不锈钢股份有限公司 | Ultra-low oxygen medium chromium ferrite stainless steel and smelting method thereof |
| CN113462984A (en) * | 2021-07-16 | 2021-10-01 | 浙江青山钢铁有限公司 | High-corrosion-resistance super-free-cutting soft magnet ferrite stainless steel wire rod and preparation method thereof |
| CN114393181A (en) * | 2022-01-29 | 2022-04-26 | 燕山大学 | Ultrahigh-strength plastic-tough high manganese steel, assembled frog thereof and preparation method |
| CN114606440A (en) * | 2022-02-28 | 2022-06-10 | 浙江青山钢铁有限公司 | High-performance soft magnetic stainless steel and preparation method thereof |
| CN114959179A (en) * | 2022-06-07 | 2022-08-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of stainless steel plate blank for welding strip |
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| CN115287544B (en) * | 2022-08-24 | 2023-10-31 | 浙江青山钢铁有限公司 | Soft magnetic stainless steel wire rod with excellent welding performance and manufacturing method thereof |
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