CN108754334A - 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars and its manufacturing method - Google Patents
500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars and its manufacturing method Download PDFInfo
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- CN108754334A CN108754334A CN201810823715.5A CN201810823715A CN108754334A CN 108754334 A CN108754334 A CN 108754334A CN 201810823715 A CN201810823715 A CN 201810823715A CN 108754334 A CN108754334 A CN 108754334A
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- 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
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- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
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- 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
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- 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
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- 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
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- 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
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- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- 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
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- 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
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- 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
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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and its manufacturing methods, wherein 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars, by weight percentage chemical composition content be：C：0.15~0.20%, Si：0.20~0.60%, Mn：0.95~2.0%, Cu：0.10~12.0%, P：0.06~1.50%, Cr：0.20~2.50%, Ni：0.0~2.0%, V：0.0~2.8%, RE：0.0~2.0%, surplus is Fe and inevitable impurity.The reinforcing bar has the following advantages that：The good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly to a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and 500MPa
The manufacturing method of grade antidetonation atmospheric corrosion resistance reinforcing bar.
Background technology
In industry and rural stmosphere, common reinforcing bar is easy to be corroded, and loose rusty scale can be formed after corrosion,
Also some micro-cracks are will produce, the protective effect of rebar matrix is gradually weakened, cannot be played a protective role.Cause corrosion factor
Very much, the mechanism of corrosion is also not quite similar, and is generally divided into three kinds of electrochemical corrosion, chemical attack and stress corrosion forms.
Weather resisting steel is usually that the alloying elements such as a certain amount of Cu, P or Ni, Mo, Nb, Ti, Cr are added in steel, is made
At a kind of good low-alloy steel of atmospheric corrosion resistance.The mechanism of weather resisting steel is mainly steel feelings existing for moisture film
Under condition, the process that the oxygen in air is electrochemically reacted by rusty scale, rusty scale is by loose outer rusty scale and fine and close interior rust
Layer is formed, and the alloying element in steel is mainly acted on by the influence of interior rusty scale.Generally in the corruption of weather resisting steel
It loses in product, it is observed that rusty scale in Cu, P, Cr densification.
The corrosion resistance of reinforcing bar has become the project that industrialized country is mainly studied, the various corrosion-resistant steel bars of high life,
The use scope of weather-proof reinforcing bar expands increasingly, in order to solve the etching problem of reinforcing bar, urgent need develop some costs it is relatively low,
Atmospheric corrosion resistance reinforcing bar easy to spread.
Invention content
In view of this, the present invention provides a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and the 500MPa grades of resistance to air of antidetonation
The manufacturing method of corrosion reinforcing bar.
The present invention provides a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, by weight percentage chemical composition content
For：C：0.15~0.20%, Si：0.20~0.60%, Mn：0.95~2.0%, Cu：0.10~12.0%, P：0.06~
1.50%, Cr：0.20~2.50%, Ni：0.0~2.0%, V：0.0~2.8%, RE：0.0~2.0%, surplus is for Fe and not
Evitable impurity.
The present invention also provides a kind of manufacturing methods of above-mentioned reinforcing bar, including：Desulfurizing iron：Using KR method desulfurization, desulfurizing agent
Be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；Combined blown converter is smelted：Using single-slag practice, finishing slag basicity is pressed
3.0 controls, converter use low catch carbon technique, converter terminal control targe C to be not more than 0.06%, and tapping temperature control is not less than
1630℃；LF refining：Using ferromanganese, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying, final deoxidizing, which uses, aluminium deoxidation；Even
Casting：Molten steel is cast under a shielding gas, and casting speed control is cooled down in 2.3~2.5m/min, Continuous Casting Secondary Cooling using weak cold, and
Continuous casting billet is obtained with permanent pulling rate, slab heating temperature is controlled at 1100~1200 DEG C, and 1050~1150 DEG C of steel billet tapping temperature is opened
950~1050 DEG C of temperature, 900~950 DEG C of finishing temperature are rolled, every time deflection of steel billet is 11~20%, total deformation 11
~35%.
Further, in the LF refining, denaturant is added to molten steel.
Further, in the casting process, rolling cooling procedure cannot wear water.
Compared with the existing technology, the 500MPa grade antidetonation atmospheric corrosion resistance reinforcing bars tool prepared according to the method provided by the invention
It has the following advantages：The good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows that 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar metallographic structure according to an embodiment of the invention is shone
Piece.
Specific implementation mode
The invention discloses a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and its manufacturing method, those skilled in the art
Present disclosure can be used for reference, technological parameter realization is suitably modified.In particular, it should be pointed out that all similar substitutions and modifications pair
It is it will be apparent that they are considered as being included in the present invention for those skilled in the art.The method of the present invention and application are
Be described through passing through preferred embodiment, related personnel obviously can not depart from the content of present invention, in spirit and scope to this
Methods and applications described in text are modified or suitably change and combine, to realize and apply the technology of the present invention.
The present invention provides a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, by weight percentage chemical composition content
For：C：0.15~0.20%, Si：0.20~0.60%, Mn：0.95~2.0%, Cu：0.10~12.0%, P：0.06~
1.50%, Cr：0.20~2.50%, Ni：0.0~2.0%, V：0.0~2.8%, RE：0.0~2.0%, surplus is for Fe and not
Evitable impurity.
The yield strength R of the reinforcing bar after rollingp0.2>=500MPa, tensile strength Rm>=700MPa, elongation percentage A >=16%, by force
It bends and compares Rm 0/ReL 0>=1.25, mark in the wrong compares ReL 0/ReL≤1.30.Since the most effective alloying element for the oxidation resistance for improving steel is
Chromium, silicon and aluminium, but silicon in steel, aluminium mass fraction it is more when steel become fragile, therefore in anti-chlorine ion corrosion reinforcing bar, Cr is added
Element enables steel to form one layer of complete, fine and close and stable protective oxide layer on the surface of steel, to improve the antioxygen of steel
Change ability.The intensity of solid solution and cold work hardening degree in steel, which can be improved, in silicon makes the toughness of steel and plasticity reduce, and can be significantly
Ground improves elastic limit, yield limit and the yield tensile ratio of steel, and when the steel containing silicon heats in oxidizing atmosphere, surface will also be formed
One layer of SiO2Film plays the role of corrosion resistant to improve the inoxidizability of steel at high temperature.Nickel the intensity of steel can be improved and
Do not significantly reduce its toughness, reduce the brittle transition temperature of steel, you can the low-temperature flexibility for improving steel, improve steel processability and can
Weldering property, improves the resistance to corrosion of steel, can not only be acidproof, and the corrosion of energy alkali resistant and air.Vanadium has very heat-flash epistasis, can show
Writing ground improves the welding performance of common low carbon low-alloy steel.
Correspondingly, the present invention also provides a kind of manufacturing methods of above-mentioned reinforcing bar, including：Desulfurizing iron：Using KR method desulfurization,
Desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；Combined blown converter is smelted：Using single-slag practice, finishing slag
Basicity is by 3.0 controls, and converter uses low catch carbon technique, converter terminal control targe C to be not more than 0.06%, and tapping temperature controls not
Less than 1630 DEG C；LF refining：Using ferromanganese, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying, final deoxidizing, which uses, has aluminium de-
Oxygen；Continuous casting：Molten steel is cast under a shielding gas, and for casting speed control in 2.3~2.5m/min, Continuous Casting Secondary Cooling is cold using weak cold
But, and with permanent pulling rate obtain continuous casting billet, slab heating temperature control at 1100~1200 DEG C, steel billet tapping temperature 1050~
1150 DEG C, 950~1050 DEG C of start rolling temperature, 900~950 DEG C of finishing temperature, every time deflection of steel billet is 11~20%, total to become
Shape amount is 11~35%.
Further, in the LF refining, denaturant is added to molten steel.
Further, in the casting process, rolling cooling procedure cannot wear water.
Desulfurizing iron use KR method desulfurization, desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent.
Converter is smelted using combined blown converter, and using single-slag practice, finishing slag basicity is by 3.0 controls, for the lower tapping phosphorus of guarantee, suitably
Tapping temperature and metastable tapping carbon, converter use low catch carbon technique, converter terminal control targe C to be not more than 0.06%,
Tapping temperature control is not less than 1630 DEG C.Refining is using ferromanganese, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying, final deoxidizing
Using there is aluminium deoxidation.Influence of the nonmetallic inclusionsin steel to the corrosion resistance of steel is bigger, and molten steel need to be added in LF refining
Some denaturants, rare earth alloy is added in the production of this atmospheric corrosion resistance reinforcing bar makes non-metallic inclusion denaturation nodularization, disappears
Their adverse effects to rigidity matter are removed or reduced, to purify steel, total inclusion content is reduced, field trash is made to be connect with steel matrix
Corrosion between contacting surface is reduced.Non-metallic inclusion quantity is more, and particle is larger to will produce baneful influence to steel, so must incite somebody to action
Big (MnS) denaturation that is mingled with of corrosion rate in steel is mingled with for corrosion rate is small, to reduce film micro area electricity inside steel matrix
Chemical attack.Continuous casting steel is cast under a shielding gas, and casting speed control is in 2.3~2.5m/min, due to the addition of alloy, continuous casting
Two cold water distributions are cooled down using weak cold, prevent strand from face crack, internal flaw occur, while ensureing that permanent pulling rate obtains continuous casting as possible
Base.
Slab heating temperature control is at 1100~1200 DEG C, 1050~1150 DEG C of steel billet tapping temperature, and start rolling temperature 950~
1050 DEG C, 900~950 DEG C of finishing temperature, every time deflection of steel billet is 11~20%, and total deformation is 11~35%.To protect
The good mechanical property of product is demonstrate,proved, rolling cooling procedure must not wear water, mainly since alloying element content is more, greatly increase
The quenching degree of steel is added, has such as carried out Water cooling in preparation process, be easy to get quenching structure, reduce plastic property of reinforcement rebar and welding
Performance.
Compared with the existing technology, the 500MPa grade antidetonation atmospheric corrosion resistance reinforcing bars tool prepared according to the method provided by the invention
It has the following advantages：The good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
With reference to embodiment, the present invention is further explained：
Embodiment 1
The chemical composition of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars is as shown in table 1 in this example.The main system of the reinforcing bar
It is for technique：Desulfurizing iron-converter-LF refining-continuous casting-rolling.Desulfurizing iron：Blast furnace slag is removed before desulfurization, to improve
Desulfuration efficiency；It is molten iron to take iron ore melting, and molten iron uses KR method desulfurization, i.e., uses rotating speed for 90r/min's the molten iron
Paddle stirring is stirred, after stirring 2min, desulfurizing agent, desulfurizing agent 9 is added：The pulverized limestone and fluorite of 1 mass ratio mixing, stirring are anti-
10min is answered, 5min is stood.Desulfurizing iron removes desulfurization slag after standing, and stably desulphurizing effect prevents desulfurization slag from entering converter and causes
Sulphur is returned in converter, ensures that sulfur content control is below 0.01% in steel.Converter：Using top and bottom complex blowing carry out decarburization, dephosphorization, 1650 DEG C
It is lower smelt to carbon content in molten steel less than 0.05%, phosphorus content is less than 0.01% tapping, used in tapping process protective gas with
The pressure of 0.5MPa stirs molten steel, and tapping carries out to ferrosilicon, silicomangan deoxidation are added when 1/4, carbon dust and slag material is added, goes out
A large amount of slags are prevented when steel, meanwhile, the protective gas pressure is gradually reduced with tap.Refining：Using LF external refinings,
Oxygen content is 0.002% in deoxidation to molten steel at 1575 DEG C, be added ferromanganese, nickel plate and ferrochrome, vanadium alloying element, refining terminates
Ca-Fe alloy line is fed afterwards, while ensureing that the soft blow time is not less than 10min.Continuous casting：Ensure that permanent pulling rate carries out drawing steel, pulling rate control as possible
For system in 2.3m/min, casting blank section is 150mm × 150mm, and strand length is 11.5m.Rolling：Specific rolling mill practice such as 2 institute of table
Show, continuous casting billet is heated to 1200 DEG C, 1200 DEG C or so of thermometric of coming out of the stove is rolled, rolling temperature 1050 after high-pressure water descaling
± 20 DEG C, through roughing, in roll after, control 950 ± 20 DEG C of finishing temperature, reinforcing bar cannot be carried out in the operation of rolling to wear water, then
Upper cold bed, into finishing, bundling process.
After offline to reinforcing bar examine mechanical property, metallographic structure figure as shown in Figure 1, mechanical property the results are shown in Table 3, inspection
Survey method reference《GB1499.2-2007 concrete reinforcement steel second parts：Hot rolled ribbed bars》It carries out.With reference to national standard《GB/
The anti-corrosion reinforcing bar of T33953-2017 armored concrete》Middle bending and reverse bending test method regulation are tested, forward direction bending
After 180 ° of bar bending, rebar surface is observed, does not find apparent macroscopic crackle.Back-flexing is that reinforcing bar forward direction is curved
Bent 90 °, 30min then is kept the temperature in 100 ± 20 DEG C of heating furnace, carries out reverse bending test after natural cooling, then to anti-
To 20 ° of bending, rebar surface is observed after the test, to find apparent macroscopic crackle.
Corrosion resisting property is tested：Week leaching corrosion test reference week, leaching corrosion test was with reference to YB/T4368-2014《Bar bender sparetime university
Corrosion tests in compression ring border》It carries out.Sample be 18mm × 50mm cylinder, testing liquid be initial concentration be (0.34 ±
0.009) sodium chloride solution of mol/L (mass fraction is 2.0% ± 0.05%).Specifically experimental condition is：Temperature：45℃±2
℃；Humidity：70% ± 10%RH；Test period：168h；Each cycle period；60min±2min；Wherein infiltrating time：
12min±2min；Specimen surface maximum temperature after baking：70 DEG C ± 10 DEG C, the results are shown in Table 4 for corrosion resistance test.
The chemical composition of 1 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
The rolling mill practice of 2 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
| Process program | Tapping temperature/DEG C | Start rolling temperature/DEG C | Enter final rolling temperature/DEG C | Finishing temperature/DEG C |
| Before technique | 1200±20 | 1050±20 | 1050±20 | 950±20 |
The mechanical property result of 3 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
| Number | Rp0.2/MPa | Rm/MPa | A% | Z% | Rm 0/ReL 0 | ReL 0/ReL |
| 1-1 | 549 | 759 | 25.0 | 69 | 1.38 | 1.10 |
| 1-2 | 540 | 751 | 24.5 | 64 | 1.39 | 1.08 |
| 1-3 | 545 | 759 | 24.0 | 66 | 1.39 | 1.09 |
| 1-4 | 541 | 750 | 25.0 | 65 | 1.39 | 1.08 |
4 corrosion resistance test result of table
| Number | Corrosion rate (g/m2·h) | Relatively corrosive rate |
| HRB400 | 4.927 | 1.00 |
| Compare sample 1 | 2.994 | 0.61 |
As shown in the above, the 500MPa grade antidetonation atmospheric corrosion resistance reinforcing bars that prepared by method provided by the invention have such as
Lower advantage：The good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, which is characterized in that chemical composition content is by weight percentage：
C：0.15~0.20%, Si：0.20~0.60%, Mn：0.95~2.0%, Cu：0.10~12.0%, P：0.06~1.50%,
Cr：0.20~2.50%, Ni：0.0~2.0%, V：0.0~2.8%, RE：0.0~2.0%, surplus is for Fe and inevitably
Impurity element.
2. the manufacturing method of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar described in claim 1, which is characterized in that including：
Desulfurizing iron：Using KR method desulfurization, desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；
Combined blown converter is smelted：Using single-slag practice, finishing slag basicity uses low catch carbon technique, converter terminal control by 3.0 controls, converter
Target C processed is not more than 0.06%, and tapping temperature control is not less than 1630 DEG C；
LF refining：Using ferromanganese, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying, final deoxidizing, which uses, aluminium deoxidation；
Continuous casting：Molten steel is cast under a shielding gas, and for casting speed control in 2.3~2.5m/min, Continuous Casting Secondary Cooling is cold using weak cold
But, and with permanent pulling rate obtain continuous casting billet, slab heating temperature control at 1100~1200 DEG C, steel billet tapping temperature 1050~
1150 DEG C, 950~1050 DEG C of start rolling temperature, 900~950 DEG C of finishing temperature, every time deflection of steel billet is 11~20%, total to become
Shape amount is 11~35%.
3. the manufacturing method of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar according to claim 2, which is characterized in that described
In LF refining, denaturant is added to molten steel.
4. the manufacturing method of 500MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar according to claim 2, which is characterized in that described
In casting process, rolling cooling procedure cannot wear water.
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Cited By (8)
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|---|---|---|---|---|
| CN110453136A (en) * | 2019-09-11 | 2019-11-15 | 莱芜泰铼经贸有限公司 | A kind of hot rolling antirust reinforcing bar and its production method |
| CN110695084A (en) * | 2019-10-22 | 2020-01-17 | 中冶南方武汉钢铁设计研究院有限公司 | Production method of non-heating high-strength steel |
| CN112662948A (en) * | 2020-12-09 | 2021-04-16 | 本钢板材股份有限公司 | RE-Cr-Cu composite corrosion-resistant steel and preparation method thereof |
| CN114672724A (en) * | 2022-02-21 | 2022-06-28 | 长沙东鑫环保材料有限责任公司 | A kind of rare earth and nitrogen microalloyed molybdenum-containing HRB500E coiled steel bar and production method thereof |
| CN115323267A (en) * | 2022-07-19 | 2022-11-11 | 包头钢铁（集团）有限责任公司 | Weather-resistant hot-rolled H-shaped steel for steel structure and production method thereof |
| CN115976411A (en) * | 2022-12-21 | 2023-04-18 | 陕钢集团产业创新研究院有限公司 | Anti-seismic steel bar and preparation method thereof |
| CN116083820A (en) * | 2023-01-13 | 2023-05-09 | 桂林理工大学 | A method for preparing low-cost, high-strength, high-corrosion-resistant antimony-containing steel bars from high-phosphorus copper-containing iron ore |
| CN118480741A (en) * | 2024-05-31 | 2024-08-13 | 成都冶金实验厂有限公司 | 500 MPa-level refractory steel bar and production method thereof |
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| CN115323267B (en) * | 2022-07-19 | 2023-08-08 | 包头钢铁（集团）有限责任公司 | Weather-resistant hot-rolled H-shaped steel for steel structure and production method thereof |
| CN115976411A (en) * | 2022-12-21 | 2023-04-18 | 陕钢集团产业创新研究院有限公司 | Anti-seismic steel bar and preparation method thereof |
| CN116083820A (en) * | 2023-01-13 | 2023-05-09 | 桂林理工大学 | A method for preparing low-cost, high-strength, high-corrosion-resistant antimony-containing steel bars from high-phosphorus copper-containing iron ore |
| CN118480741A (en) * | 2024-05-31 | 2024-08-13 | 成都冶金实验厂有限公司 | 500 MPa-level refractory steel bar and production method thereof |
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