CN109023073A - A kind of tensile strength is 3000MPa grades of cord gren rods and production method - Google Patents
A kind of tensile strength is 3000MPa grades of cord gren rods and production method Download PDFInfo
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/04—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
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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Abstract
A kind of tensile strength is 3000MPa grades of cord gren rods, component and wt% are as follows: C:0.65~0.70%, Si:0.36~0.40%, Mn:0.10~0.14%, P≤0.01%, S≤0.01%, Cr:0.10~0.25%, B:0.0005~0.0015%.Production method: converter smelting；RH application of vacuum；It is casting continuously to form small billet；Slow cooling is carried out to slab；Slab is heated；Carry out high-speed rolling；Spinning；It is air-cooled and stand-by.The content that the present invention passes through reduction carbon, improve the content and matched technique of silicon, under the premise of guaranteeing that its tensile strength is greater than 4000MPa, also gauge or diameter of wire is made to reach 3.0 ~ 3.5mm, make timeliness when more preferable wire rod fractography homogenization performance, the miniaturization of γ crystal grain, inhibition wire drawing and inhibits the fracture of cementite；And the intensity and the hot candied limit of wire rod are improved, make to twist stock fracture of wire number no more than 2 time/ton steel, moreover it is possible to the secondary operation of user is omitted and simplify, to reduce production cost and improve production efficiency.
Description
Technical field
The present invention relates to a kind of wire rod and production methods, belong to superhigh intensity tyre cord thread material and production method, especially relate to
And a kind of tensile strength is 3000MPa grades of cord gren rods and its production method.
Background technique
Along with flourishing for auto industry, framework material of the cord steel as tire, domestic annual requirement is more than 200
Ten thousand tons and in increasing trend year by year.
Cord steel is the superfine product in wire fabrication, is known as " jewel on imperial crown ".It is required: final diameter is tiny (can
Up to 0.15mm), ton steel drawing length is more than 3000 kilometers, and production difficulty is larger for the producer；And exist: Yong Hushen
Processing flow is long and complicated, i.e., need to drawing Jing Guo tens passages and heat treatment procedure, and steel wire compression ratio will be more than simultaneously
99%, ton steel twist stock wire broken rate at 4 times and within, such as any subtle defect of cord steel, may in deep-processing process
Fracture of wire is caused, mechanics, the twisting property of steel wire can not also be able to satisfy the deficiency of user's requirement.
With energy conservation and environmental protection require it is increasingly harsh, cord steel deep processing require wire rod iron scale removal by original
The pickling come is changed to mechanical descaling, and the heat treatment of wire rod will be become more environmentally friendly water-bath process from lead bath, and has and become twice
Once.These are all that great changes will take place for production technology.
According to the understanding to tyre industry, data are shown, if cord steel one strength grade of every raising, can make tire
Steel using amount can loss of weight 10%, and then the rolling resistance of tire can be reduced, and reduce automobile fuel consumption, therefore the high strengthening gesture of cord steel
It can not keep off.
However the 3000MPa of production grade cord steel in the prior art, since carbon content is up in the ingredient of its steel
0.70wt% or more, therefore so that the Uniform Control of steel is had difficulties, and not only high production cost, wire rod quality stability
It is difficult to ensure.
The current deep processing process of cord steel are as follows: wire rod is by peeling off, after rough, middle drawing, using heat treatment again Ovshinsky
After body, rewetting pulls into the superfine small cord (such as: 0.175mm) of diameter, and finally carrying out twirl stock again, (steel wire strand is woven in one
Rise) at final finished.
No matter cord steel specification is Ф 5.5mm in the market currently, 70C, 80C, 90C, that is to say, that if the wire rod provided
Diameter is constant, then deep processing process is just difficult to simplify.Only for production efficiency, energy-saving it is difficult to realize.Therefore, exploitation is straight
Diameter is less than the cord of Ф 5.5mm, then becomes key.
Through retrieving:
Chinese Patent Application No. is the document of CN201210173758.6, is related to a kind of boracic cord steel and its preparation side
Method, joined micro boron in ingredient: NT grades: C:0.69%-0.76%, Si:0.15%-0.30%, Mn:0.40%-
0.60%, P :≤0.025%, S≤0.025%, Cr :≤0.10%, Ni :≤0.10%, Cu :≤0.10%, B:0.0005%-
0.0035%, As :≤0.030%, Al :≤0.0050%, N :≤0.0080%, Yu Tie and trace impurity；HT grades: C:
0.79%-0.86%, Si:0.15%-0.30%, Mn:0.40%-0.60%, P :≤0.025%, S :≤0.025%, Cr :≤
0.10%, Ni :≤0.10%, Cu :≤0.10%, B:0.0005%-0.0035%, As≤0.030%, Al :≤0.0050%,
N :≤0.0080%, Yu Tie and trace impurity.The invention is other than adding boron, and the essential elements such as C, Si, Mn are normal in steel
Ingredient is advised, the problem of high-carbon steel production and application is equally faced, with the raising of intensity, carbon content is continuously improved in steel, is caused
Steel uniformity controlling is difficult, limits high-intensitive, superhigh intensity cord steel production and application.
Chinese Patent Application No. is the document of CN201510817739.6, discloses a kind of cord steel containing chromium, is NT grades
(2000MPa grades) and HT grades of (3000MPa grades) cord steels are to improve harden ability, joined Cr.NT grades of chemical components: C:
0.69-0.76%, Si:0.15-0.30%, Mn:0.15-0.60%, Cr:0.30-0.60%, P≤0.025%, S≤
0.025%, Ni≤0.10%, Cu≤0.10%, As≤0.030%, Al≤0.0050%, N≤0.0080%, O≤
0.0030%；HT grades of chemical components: C:0.79-0.86%, Si:0.15-0.30%, Mn:0.15-0.60%, Cr:0.30-
0.60%, P≤0.025%, S≤0.025%, Ni≤0.10%, Cu≤0.10%, As≤0.030%, Al≤0.0050%, N
≤ 0.0080%, O≤0.0030%.The content of microelement Cr, improves steel in invention cord steel addition control steel
Harden ability improves the stability of structure of steel, as boracic patent, is only finely tuned to individual element ingredient, in steel
C, the essential elements such as Si, Mn are conventional ingredient, therefore face same problem.
Chinese Patent Application No. is the document of CN201510532359.8, discloses a kind of high-end cord steel of boracic and its life
Production method, belonging to tensile strength is 4000MPa grades.Its chemical component is by weight are as follows: and C:0.89~0.96%, Si:0.14~
0.30%, Mn:0.3~0.6%, P≤0.025%, S≤0.025%, Cu≤0.08%, Ni≤0.08%, Cr:0.10~
0.50%, Als:0.001~0.008%, Mo≤0.08%, B:0.0008~0.0035%, remaining is Fe and impurity element.Its
Since C content is up to 0.89~0.96%, making the carbon content of cord steel produced is more than that eutectoid steel is horizontal, thus will cause casting
Base segregation, and then deteriorate the uniformity of wire rod.
Chinese Patent Application No. is the document of CN201310663361.X, discloses a kind of cord steel disk that diameter is 5mm
Production technology, i.e., its by 6 passage of roughing, in roll that 6 passages, 4 passage of pre- finish rolling, 10 passage of finish rolling, to subtract 4 passage of sizing accumulative
The controlled rolling of 30 passages meets the requirements finished surface quality and dimensional accuracy.But since wire rod diameter is in 5.0mm, so
Its production technology is long, and rolling process is more, and production cost can be increase accordingly.
During casting blank solidification, with the reduction of temperature, due to solute element in the dissolubility difference of liquid phase and solid phase and
The choosing of process of setting point crystallization leads to the inhomogeneities that solute element distribution is generated in process of setting, and different elements are uneven
Property (also known as, be segregated) degree is different, wherein carbon segregation is more serious and due in high-carbon steel carbon content it is higher, carbon
The influence being segregated to steel is higher, and with the increase of carbon content, will increase the degree of segregation of Si, Mn in steel.In conclusion
The smelting and steel rolling of eutectoid steel and hypereutectoid steel, face the technical problem for being difficult to overcome, and product quality is caused to fluctuate and use
The quality at family is complained.And it is of the invention, effectively prevent high-carbon steel and produce the metallurgical technology problem that faces, improve product quality and
User adaptation has significant technological innovation.
Summary of the invention
The invention reside in the shortcomings of the prior art is overcome, provide it is a kind of can guarantee cord steel tensile strength be greater than
Under the premise of 4000MPa, keep wire rod fractography homogenization performance good, γ crystal grain realizes miniaturization, inhibit the fracture of cementite,
Make to twist stock fracture of wire number no more than 2 time/ton steel, and 3000MPa grade cord gren rod and the production of rough process can be omitted
Method.
Realize the measure of above-mentioned purpose:
A kind of tensile strength is 3000MPa grades of cord gren rods, component and weight percent content are as follows: C:0.65
~0.70%, Si:0.36~0.40%, Mn:0.10~0.14%, P≤0.01%, S≤0.01%, Cr:0.10~0.25%,
B:0.0005~0.0015%, remaining is Fe and inevitable impurity.
A kind of method that tensile strength is 3000MPa grades of cord gren rods is produced, step:
1) converter smelting is carried out, P < 0.015% in the molten iron into before converter, S < 0.01% are controlled；And control tapping
C in Shi Gangshui is not less than 0.1%, and deoxidation alloying is routinely carried out in tapping process；
2) RH application of vacuum is carried out, the processing time is not less than 10 cycle periods；
3) be casting continuously to form small billet: tundish uses electromagnetic induction heating, and controls molten steel overheat no more than 15 DEG C；Small side
Base cross dimensions is no more than 160mm × 160mm, and drawing speed is stablized in 0.55~0.75m/min；Using solidification end Dynamic Light
Soft reduction process, slab overall reduction is in 14~19mm；
4) slow cooling is carried out to slab, slow cooling time is no less than 48 hours；
5) slab is heated, controls its soaking temperature at 1115~1145 DEG C, soaking time is in 100~140min；
6) high-speed rolling is carried out, roughing adds up reduction ratio and is not less than 40%；
7) it spins, control laying temperature is not less than 925 DEG C；Diameter is in 3.0mm~3.5mm after spinning；
8) progress is air-cooled, is cooled to room temperature in the case where cooling velocity is 10~15 DEG C/s；For use.
The effect and mechanism of each element and main technique in the present invention:
C: carbon is most important component in steel, the most significant on the intensity of wire rod and plasticity influence, with carbon content
Increase, wire rod intensity is continuously improved, but plasticity drastically reduces, while carbon content is higher, and production control difficulty is bigger, product matter
It is poorer to measure stability.In the present invention, if carbon content be higher than 0.70wt%, production difficulty and cost compared with prior art, nothing
Significant advantage；If being lower than 0.65wt%, final steel wire product strength is difficult to meet the requirement of 3000MPa.It therefore, is reduction smelting
Production difficulty is refined, carbon content significantly reduces compared with same level cord steel in the present invention.Carbon content of the present invention be 0.65~
0.70wt%.
Si: silicon is intensified element important in steel, can significantly improve the elastic limit of steel wire after drawing, and can effectively reduce
Strength reduction caused by heat treatment, meanwhile, element silicon can also slow down the broken of drawing process cementite, promote steel wire resultant force
Learn performance.Therefore, to make up intensity notch caused by carbon content reduction, steel wire properties after drawing are promoted, silicone content of the present invention is aobvious
It writes and is higher than same level tradition cord steel.If silicone content of the present invention is higher than 0.40wt%, steel wire brittleness tendency increases, and leads to steel wire
Drawing fracture of wire increases, comprehensive if intensity of steel wire is unable to satisfy the requirement of 3000MPa rank if silicone content is lower than 0.36wt%
Various aspects factor, silicone content are set to 0.36~0.40wt%.
Mn: manganese is valuable alloying element, MnS is generated in conjunction with sulphur, and then mitigate the harm of sulphur, and can refine pearly-lustre
Body improves intensity of steel wire, but excessively high manganese will increase the superheated susceptivity of steel, and crystal grain when heat treatment is made to be easy to grow up.This hair
Bright to use dephosphorization, desiliconization and desophorization for hot metal, sulfur content control is lower, to reduce cost, does not need excessively high manganese, the control of Mn content 0.10~
0.14wt%.If being lower than 0.10wt%, wire rod and intensity of steel wire are insufficient；It is thick that crystal grain is easy to appear if being higher than 0.14wt%
Greatly, mechanical property deficiency is also resulted in.
P, S: p and s belong to harmful element in this steel grade, and phosphorus is easy to produce cold short, and Sulfur capacity is also easy to produce hot-short, and then deteriorates
Steel wire drawing and heat treatment process condition, it is therefore desirable to reduce its content as far as possible.From a cost perspective, P of the present invention≤
0.01wt%, S≤0.01wt% are most appropriate.
Cr: chromium can refine pearlite lamella, improve finished product intensity of steel wire, but excessively high chromium (more than 0.25wt%), can mention
High wire rod harden ability causes course of hot rolling the abnormal structures such as martensite occur, meanwhile, excessively tiny lamella can reduce wire rod
Toughness, and then deteriorate the most key index-twisting property of steel wire；In addition, be lower than 0.10wt% chromium content, to steel strength and
It is unobvious to refine lamella effect, therefore Cr:0.10~0.25wt% of the present invention.
B: the boron of (being greater than 0.0005wt%) micro in high-carbon steel can inhibit P in the enrichment of crystal boundary, and improve field trash
Form, and then the cold-forming property of wire rod can be improved, but excessive boron (more than 0.0015%) can weaken the deterioration of crystal boundary binding force
Wire rod mechanical property.Therefore B:0.0005~0.0015wt% of the present invention.
The present invention why by drawing speed stability contorting in 0.55~0.75m/min, be because corresponding section is no more than
The slab of 160mm × 160mm, when pulling rate stablizes some fixed value between 0.55~0.75m/min, most beneficial for segregation
Control and the middle floating removal for sandwiching sundries.
The time why present invention carries out slow cooling to slab is no less than 48 hours, is because steel of the present invention belongs to alloy
Steel grade, carrying out slow cooling helps to reduce blank internal stress, and then reduces the cracking of lifting or heating process.
Why the present invention controls soaking temperature at 1115~1145 DEG C, and soaking time is because of curtain in 100~140min
Line steel requires wire rod decarburization strictly, by determining in furnace temperature and time inside furnace, to can be effectively controlled the decarburization situation of wire rod.
Why the present invention controls laying temperature not less than 925 DEG C, is because laying temperature is the pass of the cold process of wire rod control
One of key technological parameter, the control by laying temperature are to obtain the necessary condition preferably organized, laying temperature in the present invention
It needs both obtain excellent metallographic structure, moreover it is possible to obtain when laying temperature is not less than 925 DEG C with air-cooled speeds match
Optimal iron scale state, convenient for the mechanical descaling of user.
The present invention why control air-cooled speed be 10~15 DEG C/s, be because when cooling velocity be lower than 10 DEG C/s when, disk
To occur a large amount of pro-eutectoid ferrites in item, or even be distributed along crystal boundary, severe weakness intergranular binding force, is abnormal structure；When
When cooling velocity is greater than 15 DEG C/s, coarse martensite will occurs in steel, wire rod drawing process is caused fracture of wire occur.
The present invention improves the content of silicon, then be equipped with matched technique by the content of reduction carbon, is guaranteeing its tensile strength
Under the premise of greater than 3000MPa, gauge or diameter of wire is also made to reach 3.0~3.5mm, and then the cooling effect after wire rolling can be improved
Fruit makes more preferable wire rod fractography homogenization performance, the miniaturization of γ crystal grain, timeliness and inhibition when wire drawing is inhibited to seep
The fracture of carbon body；And can further improve the intensity and the hot candied limit of wire rod, make to twist stock fracture of wire number no more than 2 time/ton steel, also
The secondary operation of user can be omitted and simplify, to reduce production cost and improve production efficiency.In environmental protection, user uses
Thin footpath wire rod reduces the energy-consuming of wire drawing and omits heat treatment.
Specific embodiment
The present invention is described in detail below:
Table 1 is the chemical component list of various embodiments of the present invention and comparative example；
Table 2 is the smelting process technological parameter list of various embodiments of the present invention and comparative example；
Table 3 is the Technological Parameters of Rolling Process list of various embodiments of the present invention and comparative example；
Table 4 is the deep processing process comparison list of various embodiments of the present invention and comparative example；
Table 5 is the test result list of various embodiments of the present invention and comparative example
Various embodiments of the present invention follow the steps below production:
1) converter smelting is carried out, P < 0.015% in the molten iron into before converter, S < 0.01% are controlled；And control tapping
C in Shi Gangshui is not less than 0.1%, and deoxidation alloying is routinely carried out in tapping process；
2) RH application of vacuum is carried out, the processing time is not less than 10 cycle periods；
3) be casting continuously to form small billet: tundish uses electromagnetic induction heating, and controls molten steel overheat no more than 15 DEG C；Small side
Base cross dimensions is no more than 160mm × 160mm, and drawing speed is stablized in 0.55~0.75m/min；Using solidification end Dynamic Light
Soft reduction process, slab overall reduction is in 14~19mm；
4) slow cooling is carried out to slab, slow cooling time is no less than 48 hours；
5) slab is heated, controls its soaking temperature at 1115~1145 DEG C, soaking time is in 100~140min；
6) high-speed rolling is carried out, roughing adds up reduction ratio and is not less than 40%；
7) it spins, control laying temperature is not less than 925 DEG C；Diameter is in 3.0mm~3.5mm after spinning；
8) progress is air-cooled, is cooled to room temperature in the case where cooling velocity is 10~15 DEG C/s；For use.
The chemical component list (wt%) of 1 various embodiments of the present invention of table and comparative example
The smelting process technological parameter list of 2 various embodiments of the present invention of table and comparative example
The Technological Parameters of Rolling Process list of 3 various embodiments of the present invention of table and comparative example
The deep processing process of 4 various embodiments of the present invention of table and comparative example compares list
The test result list of 5 various embodiments of the present invention of table and comparative example
From table 4 and table 5 it is found that product of the present invention quality is stablized, user's specification requirement is fully met, and has been started completely new
Component system and ultra-fine diameter specification cord steel, simplify user's deep processing process, reduce the energy consumption of drawing process, and can be steady
It is fixed to meet the requirement for twisting 2 time/ton steel of stock wire broken rate <.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (2)
1. a kind of tensile strength is 3000MPa grades of cord gren rods, component and weight percent content are as follows: C:0.65~
0.70 %, Si:0.36~0.40 %, Mn:0.10~0.14 %, P≤0.01 %, S≤0.01 %, Cr:0.10~0.25 %, B:
0.0005~0.0015 %, remaining is Fe and inevitable impurity.
2. a kind of tensile strength is the method for 3000MPa grades of cord gren rods as described in claim 1 for production, walk
It is rapid:
1) converter smelting is carried out, 0.015 % of P < in the molten iron into before converter, 0.01 % of S < are controlled；And steel when controlling tapping
C in water is not less than 0.1 %, and deoxidation alloying is routinely carried out in tapping process；
2) RH application of vacuum is carried out, the processing time is not less than 10 cycle periods；
3) be casting continuously to form small billet: tundish uses electromagnetic induction heating, and controls molten steel overheat no more than 15 DEG C；Small billet is disconnected
Face size is no more than 160mm × 160mm, and drawing speed is stablized in 0.55~0.75m/min；Using solidification end dynamic soft-reduction
Technique, slab overall reduction is in 14~19mm；
4) slow cooling is carried out to slab, slow cooling time is no less than 48 hours；
5) slab is heated, controls its soaking temperature at 1115~1145 DEG C, soaking time is in 100~140min；
6) high-speed rolling is carried out, roughing adds up reduction ratio and is not less than 40%；
7) it spins, control laying temperature is not less than 925 DEG C；Diameter is in 3.0mm~3.5mm after spinning；
8) progress is air-cooled, is cooled to room temperature in the case where cooling velocity is 10~15 DEG C/s；For use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811029596.2A CN109023073B (en) | 2018-09-05 | 2018-09-05 | Hot-rolled wire rod for cord thread with tensile strength of 3000MPa and production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811029596.2A CN109023073B (en) | 2018-09-05 | 2018-09-05 | Hot-rolled wire rod for cord thread with tensile strength of 3000MPa and production method |
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| CN109023073B CN109023073B (en) | 2020-05-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182164A (en) * | 2021-10-26 | 2022-03-15 | 南京钢铁股份有限公司 | Steel for steel cord with tensile strength of more than or equal to 4000MPa and production method |
| CN116904863A (en) * | 2023-09-07 | 2023-10-20 | 江苏省沙钢钢铁研究院有限公司 | High-cleanliness high-carbon steel and low-carbon-emission production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016183408A (en) * | 2015-03-26 | 2016-10-20 | 新日鐵住金株式会社 | Hot rolled wire rod and production method therefor |
| CN107354380A (en) * | 2017-08-30 | 2017-11-17 | 武汉钢铁有限公司 | A kind of tensile strength >=2300MPa bridge cables steel and production method |
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2018
- 2018-09-05 CN CN201811029596.2A patent/CN109023073B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016183408A (en) * | 2015-03-26 | 2016-10-20 | 新日鐵住金株式会社 | Hot rolled wire rod and production method therefor |
| CN107354380A (en) * | 2017-08-30 | 2017-11-17 | 武汉钢铁有限公司 | A kind of tensile strength >=2300MPa bridge cables steel and production method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182164A (en) * | 2021-10-26 | 2022-03-15 | 南京钢铁股份有限公司 | Steel for steel cord with tensile strength of more than or equal to 4000MPa and production method |
| CN116904863A (en) * | 2023-09-07 | 2023-10-20 | 江苏省沙钢钢铁研究院有限公司 | High-cleanliness high-carbon steel and low-carbon-emission production method thereof |
| CN116904863B (en) * | 2023-09-07 | 2023-12-08 | 江苏省沙钢钢铁研究院有限公司 | High-cleanliness high-carbon steel and low-carbon-emission production method thereof |
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