CN112359277A - Control method for segregation and net carbon of 86-level high-strength cord steel wire rod - Google Patents
Control method for segregation and net carbon of 86-level high-strength cord steel wire rod Download PDFInfo
- Publication number
- CN112359277A CN112359277A CN202011105232.5A CN202011105232A CN112359277A CN 112359277 A CN112359277 A CN 112359277A CN 202011105232 A CN202011105232 A CN 202011105232A CN 112359277 A CN112359277 A CN 112359277A
- Authority
- CN
- China
- Prior art keywords
- percent
- wire rod
- cooling
- controlled
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 89
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000005204 segregation Methods 0.000 title claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 238000005266 casting Methods 0.000 claims abstract description 58
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000007670 refining Methods 0.000 claims abstract description 22
- 238000009749 continuous casting Methods 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 229910001567 cementite Inorganic materials 0.000 claims abstract description 7
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 238000004381 surface treatment Methods 0.000 claims abstract description 7
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 6
- 230000023556 desulfurization Effects 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 63
- 239000002893 slag Substances 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 25
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 15
- 238000010079 rubber tapping Methods 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 238000009987 spinning Methods 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910000720 Silicomanganese Inorganic materials 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000033764 rhythmic process Effects 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 230000003009 desulfurizing effect Effects 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 230000005499 meniscus Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 6
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910001562 pearlite Inorganic materials 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a control method for 86-level high-strength cord steel wire rod segregation and net carbon, which comprises the steps of KR molten iron pre-desulfurization, BOF converter smelting, LF furnace refining, continuous casting CC, casting blank surface treatment, casting blank heating, rolling control and cooling control which are sequentially carried outIn the working procedure, the 86-level high-strength cord steel wire rod comprises the following components in percentage by weight: 0.85 to 0.90 percent of C, 0.15 to 0.35 percent of Si, 0.40 to 0.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of Cr, less than or equal to 0.005 percent of Al, and the balance of Fe. The invention improves the segregation and net carbon of the wire rod by combining the continuous casting of small square billets and the rolling of wire rods, realizes the great reduction of the period and the cost, and the prepared steel wire rod
The sorbite rate of the wire rod is more than or equal to 90 percent, the center segregation of the wire rod is slight, and the center of the wire rod is free of net cementite, so that the drawing use requirement of a user is met.
Description
Technical Field
The invention belongs to the technical field of cord steel production, and particularly relates to a method for controlling segregation of a 86-level high-strength cord steel wire rod and net carbon.
Background
In recent years, the automobile industry and the machine manufacturing industry in China are rapidly developed, the demand for the cord steel is more and more large, and the requirement on the product quality is higher and more. With the development of automobiles towards the direction of light weight and environmental protection, the strength and the fatigue resistance of the cord wire steel wire are improved, and in the tire with the same total strength, the using amount of the cord wire steel wire can be reduced, so that the weight of the tire is reduced, the rolling resistance of the tire is reduced, the energy consumption is saved, and the production cost of the tire is reduced. At present, the high-strength cord steel 86 grade belongs to a product with high profit and high added value, and has large market capacity and good prospect.
The cord steel has strict requirements on chemical components, inclusions, mechanical properties, metallographic structure and the like due to the requirements on working conditions and safety performance. High Al content2O3The hard invariable clamp impurities and the wire rod core segregation (net carbon) cause the deep customersTwo major problems of tensile or crimp failure. The 86-grade cord has high C content (for example, the 86-grade cord steel wire with the mark of LX86A comprises 0.85-0.90% of C, 0.15-0.35% of Si, 0.40-0.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S and less than or equal to 0.10% of Cr), and has heavy continuous casting segregation, so that a wire rod is easy to form a net cementite, a matrix tissue is cut, and the cup-cone-shaped filament breakage is caused in the cord drawing process, thereby causing low production efficiency and poor cord quality.
Most domestic steel enterprises of 86-grade cord wires adopt a process of bloom (throwing under light pressure), high-temperature diffusion, cogging and finishing and two-fire forming, and stelmor air cooling is combined to control net carbon and decarburization quality of wire rods. Under the environment of global economy, the automobile industry is increasingly competitive, how to reduce the production and manufacturing cost and obtain higher profit margin is the pursuit target of the whole supply chain enterprise. For example, chinese patent document (application No. 201910798924.3) discloses a method for producing a square billet of high-strength cord steel, in which a two-fire forming process is adopted, i.e., a large square billet is rolled into a small square billet, and after cooling, the small square billet is heated again and rolled into 5.5 wire rods, but the process has the disadvantages of long process route and high cost.
Disclosure of Invention
The invention adopts the process of 'KR → BOF → LF → CC → surface treatment → heating → controlled rolling → controlled cooling' to replace the traditional process of 'KR → BOF → LF → CC → surface sampling → heating → cogging → scalping → heating → controlled rolling → controlled cooling'. Through the reasonable design of the steel-making process and the steel rolling process, under the conditions that the steel is formed without secondary fire, the skinning treatment is not needed, and the technical support of continuous casting machinery is not provided, the control method for the segregation and the net carbon of the 86-level high-strength cord steel wire rod is provided, the segregation and the net carbon of the 86-level high-strength cord steel wire rod are improved, and the drawing broken wires of customers caused by the problem are reduced.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for controlling segregation and net carbon of a 86-level high-strength cord steel wire rod comprises a KR molten iron pre-desulfurization process, a BOF converter smelting process, an LF furnace refining process, a continuous casting CC process, a casting blank surface treatment process, a casting blank heating process, a controlled rolling process and a controlled cooling process which are sequentially carried out, wherein the 86-level high-strength cord steel wire rod comprises the following components in percentage by weight: 0.85 to 0.90 percent of C, 0.15 to 0.35 percent of Si, 0.40 to 0.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of Cr, less than or equal to 0.005 percent of Al, and the balance of Fe and inevitable impurity elements.
KR molten iron pre-desulfurization process: the S element belongs to an easily segregated harmful element, and is used for pre-treating molten iron in order to reduce the enrichment of the S element in a casting blank solidification center and the segregation of the casting blank. Therefore, in the KR procedure, 3-6 kg/ton of desulfurizing agents such as lime and the like are added into the hot metal tank, strong mechanical stirring is applied to remove the S content in the hot metal, and then the S-removed slag is removed, so that the S content in the hot metal fed into the converter is ensured to be less than or equal to 0.003%.
BOF converter smelting process: p also belongs to easily segregated harmful elements, the content of P in the finished product is controlled to be less than or equal to 0.010 percent, the content of S in the finished product is controlled to be less than or equal to 0.008 percent, and the content of P and S in the finished product is controlled to be less than or equal to 0.016 percent, and the specific control method comprises the following steps: in order to ensure that the finished product P, S and other harmful elements are at a lower level, the BOF smelting uses the special clean scrap steel for the cord thread (the components mainly comprise Fe, C, Si and Mn and other inevitable trace elements, and the total amount accounts for 10-30% of the total metal loading). In addition, the BOF smelting of the converter adopts a double-slag process, namely when the silicomanganese oxidation period of the converter blowing is finished for about 5 +/-1 min, a gun is lifted, the P-removed slag is poured out, the P return in the later stage of the converter blowing is prevented, the gun is put down again and the slag is formed, and the P content of the discharged steel is ensured to be less than or equal to 0.010 percent. In the BOF converter smelting process, the converter tapping adopts a double-shift tapping process, namely, slag blocking of a slag blocking cone is matched with slag blocking of a sliding plate in the tapping process, and a slag tapping detection technology is arranged to control the slag tapping amount to be less than or equal to 50kg in the tapping process, so that harmful elements such as P, S, Ti in the refining process are prevented from diffusing from slag to molten steel. The content of P, S steel grades is reduced through a double-gear tapping process, and then the casting blank segregation is reduced.
And (3) refining in an LF furnace: silicon carbide is adopted for deoxidation in the refining process, and CaO-SiO is adopted as refining slag2The binary slag system controls the alkalinity of the final refining slag to be 0.7-1.0. The stirring of the argon gas is avoided in the later period of refining (the bottom blowing argon gas is controlled to just blow off the slag surface),preventing slag from being rolled. And adjusting the components and the temperature of the molten steel to ensure that the temperature of the ladle is 35-45 ℃ higher than the liquidus temperature of the molten steel. And (5) finishing refining, wherein the soft argon blowing time is more than or equal to 15 min.
And (3) continuous casting CC process: preparing small square billet by adopting 10-machine 10-flow arc continuous casting machine, and ensuring secondary cooling strength, wherein the section of the casting billet is less than or equal to 160 x 160mm2. The arc radius of the casting machine is 10m, and the electromagnetic stirring at the tail end is 7.2m away from the meniscus. The length of the tail end electromagnetic stirring equipment is 700mm, and the inner diameter of the tail end electromagnetic stirring equipment
The key points of controlling the segregation of the casting blank in continuous casting are as follows: the average value of the carbon segregation in the center of the casting blank is less than or equal to 1.07 by the low superheat degree, strong crystallizer electromagnetic stirring and tail end electromagnetic stirring, proper pulling speed, secondary cooling and strong cooling and hot soft reduction technology. Specifically, the method comprises the following steps: in order to improve the isometric crystal proportion of a casting blank, low-superheat-degree casting is adopted for continuous casting, and the superheat degree of molten steel is controlled to be 10-25 ℃; the strong electromagnetic stirring intensity can promote the temperature of the molten steel to be uniform, break the growth of columnar crystals, promote nucleation, improve the proportion of equiaxial crystals and avoid bridging of the columnar crystals at the solidified tail end, so that the electromagnetic stirring current of the crystallizer is 250-350A, and the frequency is 2-4 Hz; the electromagnetic stirring current at the tail end is 300-400A, and the frequency is 5-10 Hz; in order to ensure that the pulling speed is properly matched with the electromagnetic stirring position at the tail end to achieve the optimal terminal stirring effect, the pulling speed is controlled to be 1.60-1.75 m/min, and the target is 1.70 m/min; in order to inhibit element separation crystallization in the casting blank solidification process, secondary cooling full water is adopted for strong cooling, and the secondary cooling specific water quantity is controlled to be 1.6-1.8L/kg. In addition, the casting blank is subjected to intensive water spray cooling at the electromagnetic stirring position at the tail end, so that the casting casing is contracted, the effect of 'hot soft reduction' is achieved, and the casting blank segregation is improved.
Further preferably, according to the temperature change of the casting blank in the secondary cooling process, the cooling water flow changes of different secondary cooling sections are set as follows: the length of the foot roller section (about 0.3m) is 9.0-11.0 m3A second cooling 1 stage (about 2.0m in length) of 11.0-13.0 m3A second cooling 2 stage (about 2.3m long) of 8.0-10.0 m32.5-4.5 m/h, secondary cooling 3 section (about 1.4m long)3H is used as the reference value. In addition, because the air cooling and temperature returning of the casting blank at the electromagnetic stirring position at the tail end, 1 section of full water cooling area (secondary cooling 4 section) is added in the subsequent air cooling section, the water flow is controlled to be 1.5-3.5 m3The temperature of the casting blank before the casting blank is fed into the straightening machine can be effectively reduced, and the probability of cracks of the hot-fed casting blank is reduced; and provides a 'hot soft reduction' effect to reduce the center segregation and center porosity of the casting blank; meanwhile, the structure of the iron scale is improved, and the yield of the metal material is improved.
Casting blank surface treatment process: and (3) cooling the obtained casting blank to below 100 ℃ in a windward dump manner, removing iron oxide scales on the surface of the casting blank by using a shot blasting machine, and then coating a layer of high-temperature decarburization-resistant coating on the surface of the casting blank. In order to ensure the anti-decarbonization effect and prevent the surface of the wire rod from being carburized, the coating is proportioned (the mass ratio of powder to liquid is 3:2), the thickness of the coating is controlled to be 0.2-1.0 mm, and the steel billet heating process is carried out after the coating is dried.
A casting blank heating procedure: the casting blank coated with the high-temperature decarburization-resistant coating is heated by adopting a high-temperature diffusion process and moves forward in a heating furnace at a constant speed, the preheating section time of the heating furnace is controlled to be 30-55 min, the heating first-section temperature is 950-. Through the casting blank heating process, the intercrystalline diffusion of elements such as C, P, S, Mn and the like is promoted, the micro segregation of the elements is reduced, and the welding of the central shrinkage cavity of the casting blank is facilitated.
In order to control the decarburization of the rolled material, the rolled material is heated in a heating furnace in a reducing atmosphere, and the air-fuel ratio is controlled to be 0.4-0.5. The tapping rhythm is carried out according to 117 minus 190 s/branch, and the total time for heating the steel billet is 190 minus 300 min.
And (3) controlling a rolling process: according to the high-temperature spinning process, the spinning temperature is controlled to be 960-.
A controlled cooling process: the wire rod is spread on a stelmor roller way after passing through a spinning machine, the air cooling speed is controlled to be 30-35 ℃/s when the air cooling speed is 0-8 s and is controlled to be 15-30 ℃/s when the air cooling speed is 9-17s by adjusting the air cooling intensity of a fan, and the phase change process is approximately constant temperature change. Further, the steel rolling fan is a centrifugal fan, and the air quantity is 200000m3And h, starting 8 fans during production. 1 st to 3 rd typhoon wind volume control along wire rod advancing directionThe air quantity of the 4 th to 6 th fans is 80 percent, so that the temperature of the wire rod rapidly passes through a secondary cementite precipitation temperature range, and then the wire rod is subjected to phase change at the 7 th fan and the 8 th fan. The air volume of the 7 th fan and the 8 th fan is adjusted to be 70%, the phase change process is controlled to be approximately constant temperature change (the phase change temperature rise is less than 30 ℃), and the full change of the wire rod structure is ensured.
Compared with the prior art, the invention has the following technical advantages:
prepared by the method of the invention
The sorbite rate of the wire rod is more than or equal to 90 percent, the center segregation of the wire rod is slight, and the center of the wire rod is free of net cementite, so that the drawing use requirement of a user is met.
The segregation and net carbon of the wire rod are improved by continuously casting the small square billet and rolling the wire rod, so that the period and the cost are greatly reduced.
The method has the advantages of simple flow, no netlike cementite, high sorbite rate and shallow decarburized layer, can realize energy conservation and consumption reduction, is green and environment-friendly, improves the competitiveness of enterprises, and creates better profit margin.
Drawings
FIG. 1 is a metallographic structure photograph of a wire rod obtained in example 1 of the present invention;
fig. 2 is a schematic diagram of a secondary cooling apparatus of a casting machine according to an embodiment of the present invention, wherein scale units are shown in the diagram: mm;
FIG. 3 is a schematic top view of a heating furnace according to an embodiment of the present invention, wherein the scale units are as follows: mm.
Detailed Description
The invention is described in more detail below with reference to the following examples:
examples 1 to 4:
the method for controlling segregation and net carbon of the 86-level high-strength cord steel wire rod comprises the following steps: KR molten iron pre-desulfurization process → BOF converter smelting process → LF furnace refining process → continuous casting CC process → casting blank surface treatment process → casting blank heating process → controlled rolling process → controlled cooling process.
Controlling the components of the smelted finished product: 0.85 to 0.90 percent of C, 0.15 to 0.35 percent of Si, 0.40 to 0.60 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of Cr, less than or equal to 0.005 percent of Al, and the balance of Fe and inevitable impurity elements.
Molten iron is pretreated by KR molten iron, the content of S is less than or equal to 0.003 percent, and special clean scrap steel for the cord thread is used (the components mainly comprise Fe, C, Si and Mn and other inevitable trace elements, and the total amount accounts for 10 to 30 percent of the total metal loading). In addition, the BOF smelting of the converter adopts a double-slag process, namely when the silicomanganese oxidation period of the converter blowing is finished for 4-5 min, a gun is lifted, the P-removing slag is poured out, the gun is put down again, the slag is formed, and the P content of the tapped steel is less than or equal to 0.008%. The converter tapping adopts a double-gear tapping process and is provided with a slag discharge detection technology, and the slag discharge is controlled to be less than or equal to 50 kg. Examples 1-4 the weight percentages of the main chemical components of the steel blanks are shown in table 1:
TABLE 1 contents of main components/% of steel billets
| Examples | C | Si | Mn | P | S | P+S | Cr | Al |
| 1 | 0.88 | 0.21 | 0.50 | 0.006 | 0.004 | 0.010 | 0.02 | 0.0009 |
| 2 | 0.89 | 0.20 | 0.51 | 0.006 | 0.005 | 0.011 | 0.03 | 0.0010 |
| 3 | 0.88 | 0.21 | 0.49 | 0.005 | 0.004 | 0.009 | 0.04 | 0.0007 |
| 4 | 0.87 | 0.22 | 0.51 | 0.007 | 0.005 | 0.012 | 0.03 | 0.0008 |
And (3) refining in an LF furnace: silicon carbide is adopted for deoxidation in the refining process, and CaO-SiO is adopted as refining slag2Binary slag system, examples 1-4 refining final slag basicity 0.7-1.0. And (3) avoiding stirring by using large argon gas in the later refining stage (controlling bottom blowing argon gas to just blow away the slag surface), and preventing slag from being rolled. The composition and temperature of molten steel were adjusted so that the ladle temperature in examples 1-4 was 38 deg.C, 41 deg.C, and 36 deg.C higher than the liquidus temperature of molten steel, respectively. And (5) finishing refining, wherein the soft argon blowing time is more than or equal to 15 min. And (3) continuous casting CC process: 160 x 160mm is prepared by adopting 10 machine 10-flow arc continuous casting machine2And (5) small square billets. Continuous casting adopts low superheat degree casting, and the superheat degree of molten steel is controlled to be 10-25 ℃; electromagnetic stirring current of the crystallizer is 250-350A, and frequency is 2-4 Hz; the electromagnetic stirring current at the tail end is 300-400A, and the frequency is 5-10 Hz; the pulling speed is controlled according to the target 1.70 m/min; and (3) carrying out secondary cooling full-water forced cooling, wherein the secondary cooling specific water amount is controlled to be 1.6-1.8L/kg. In addition, the casting blank is intensively cooled by water spray at the electromagnetic stirring position at the tail end, and the water flow is controlled to be 3.0m3And h, enabling the casting shell to shrink, playing a role in 'hot soft reduction', and improving the segregation of the casting blank. Casting blank section 160mm2The main continuous casting process parameters are shown in a table 2: TABLE 2 Main continuous casting Process parameters
| Examples | Pulling speed | Degree of superheat | Electromagnetic stirring of crystallizer | End electromagnetic stirring | Specific water of secondary cooling |
| 1 | 1.70m/min | 22℃ | 300A/3Hz | 380A/8Hz | 1.71L/kg |
| 2 | 1.71m/min | 20℃ | 300A/3Hz | 380A/8Hz | 1.69L/kg |
| 3 | 1.69m/min | 24℃ | 300A/3Hz | 380A/8Hz | 1.72L/kg |
| 4 | 1.70m/min | 18℃ | 300A/3Hz | 380A/8Hz | 1.71L/kg |
The average value of the cast blank carbon segregation (obtained by sampling by a five-point sample drilling method) is controlled to be less than or equal to 1.07 by the process.
The casting blank is cooled to below 100 ℃ by wind shielding and piling, a layer of high-temperature decarburization-proof coating is coated on the surface after removing the surface iron oxide sheet by a shot blasting machine (in the embodiment, the ZK-003 type billet high-temperature decarburization-proof coating produced by Beijing Zhongke industrial environmental engineering Co., Ltd.) is selected, and the casting blank is sent to a steel rolling mill for heating after the coating is dried. The casting blank coated with the high-temperature decarburization-proof coating is heated by a high-temperature diffusion process and moves forward in a heating furnace at a constant speed, the preheating section time of the heating furnace (shown in figure 3) is controlled to be 30-55 min, the first-section heating temperature is 950-. The heating furnace is heated by reducing atmosphere, the air-fuel ratio is controlled to be 0.4-0.5, the steel tapping rhythm is 190 s/branch according to 117-.
According to the high-temperature spinning process, the spinning temperature is controlled to be 960-.
The wire rod is spread on a stelmor roller way after passing through a spinning machine, the air cooling speed is controlled to be 30-35 ℃/s when the air cooling speed is 0-8 s and is controlled to be 15-30 ℃/s when the air cooling speed is 9-17s by adjusting the air cooling intensity of a fan, and the phase change process is approximately constant temperature change. The specific implementation method comprises the following steps: the steel rolling fan is a centrifugal fan, and the air quantity is 200000m3And h, starting 8 fans during production, controlling the air volume of the 1 st to 3 rd fans and the air volume of the 4 th to 6 th fans along the advancing direction of the wire rod to be 90 percent, controlling the wire rod to rapidly pass through a secondary cementite precipitation temperature range, controlling the air volume of the 7 th and 8 th fans to be 70 percent, controlling the temperature rise of phase change to be within 30 ℃, ensuring isothermal phase change and ensuring that the structure of the wire rod is fully changed.
The wire rod produced by the process is qualified in segregation, net carbon and decarburization, and the details are shown in a table 3:
TABLE 3
| Examples | Metallographic structure | Sorbitizing rate/%) | Center segregation/order | Net carbon/grade | Depth of decarburized layer/. mu.m |
| 1 | Pearlite | 90 | 0.5 | 0.0 | 28 |
| 2 | Pearlite | 91 | 0.5 | 0.0 | 15 |
| 3 | Pearlite | 92 | 0.0 | 0.0 | 10 |
| 4 | Pearlite | 91 | 0.5 | 0.0 | 30 |
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Claims (6)
1. A method for controlling segregation and net carbon of a 86-level high-strength cord steel wire rod is characterized by comprising the following steps of: the steel wire rod comprises a KR molten iron pre-desulfurization process, a BOF converter smelting process, an LF furnace refining process, a continuous casting CC process, a casting blank surface treatment process, a casting blank heating process, a controlled rolling process and a controlled cooling process which are sequentially carried out, wherein the 86-level high-strength cord steel wire rod comprises the following components in percentage by weight: 0.85 to 0.90 percent of C, 0.15 to 0.35 percent of Si, 0.40 to 0.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of Cr, less than or equal to 0.005 percent of Al, and the balance of Fe and inevitable impurity elements;
in the BOF converter smelting process, the P mass content in the finished product is controlled to be less than or equal to 0.010 percent, the S mass content is controlled to be less than or equal to 0.008 percent, and the total mass content of P and S is controlled to be less than or equal to 0.016 percent;
in the refining procedure of the LF furnace, silicon carbide is adopted for deoxidation in the refining process, and CaO-SiO is adopted as refining slag2A binary slag system, wherein the alkalinity of the refined final slag is controlled to be 0.7-1.0; controlling bottom-blown argon to just blow away the slag surface in the later stage of refining, adjusting the components and the temperature of the molten steel, ensuring that the temperature of the ladle is 35-45 ℃ higher than the liquidus temperature of the molten steel, and finishing refining, wherein the soft argon blowing time is more than or equal to 15 min;
and (3) continuous casting CC process: the preparation section is less than or equal to 160 x 160mm2The continuous casting of the casting blank adopts low superheat degree casting, the superheat degree of molten steel is controlled to be 10-25 ℃, the electromagnetic stirring current of a crystallizer is 250-350A, the frequency is 2-4 Hz, the electromagnetic stirring current of the tail end is 300-400A, and the frequency is 5-10 Hz; the pulling speed is controlled to be 1.60-1.75 m/min; carrying out secondary cooling full-water forced cooling, controlling the secondary cooling specific water amount to be 1.6-1.8L/kg, and carrying out intensive water spray cooling on a casting blank at the electromagnetic stirring position at the tail end of the casting blank so as to shrink the casting shell;
casting blank surface treatment process: cooling the obtained casting blank to be below 100 ℃ by wind shielding, removing iron oxide scales on the surface of the casting blank by using a shot blasting machine, then coating a layer of high-temperature decarburization-resistant coating on the surface of the casting blank, wherein the mass ratio of powder to liquid in the coating is 3:2, the thickness of the coating is controlled to be 0.2-1.0 mm, and entering a billet heating process after the coating is dried;
a casting blank heating procedure: heating the casting blank coated with the high-temperature decarburization-proof coating by adopting a high-temperature diffusion process and advancing at a constant speed in a heating furnace, controlling the preheating section time of the heating furnace to be 30-55 min, the heating first-section temperature to be 950-; heating in the heating furnace in a reducing atmosphere, and controlling the air-fuel ratio to be 0.4-0.5. The tapping rhythm is carried out according to 117 minus 190 s/branch, and the total time for heating the steel billet is 190 minus 300 min.
And (3) controlling a rolling process: controlling the spinning temperature of 960-;
a controlled cooling process: the wire rod is spread on a stelmor roller way after passing through a spinning machine, the air cooling speed is controlled to be 30-35 ℃/s when the air cooling intensity of a fan is adjusted, the air cooling speed is controlled to be 0-8 s, the air cooling speed is controlled to be 15-30 ℃/s when the air cooling is adjusted to be 9-17s, and the phase change temperature rise in the phase change process is less than 30 ℃.
2. The method for controlling segregation and net carbon of 86-level high strength cord steel wire rod according to claim 1, wherein: in the KR molten iron pre-desulfurization process, 3-6 kg of desulfurizing agents such as lime and the like are added into a molten iron tank per ton of steel, strong mechanical stirring is applied, the S content in the molten iron is removed, then the S-removed slag is removed, and the S content in the molten iron entering a converter is ensured to be less than or equal to 0.003%.
3. The method for controlling segregation and net carbon of 86-level high strength cord steel wire rod according to claim 1, wherein: the content control method of P and S in the BOF converter smelting process comprises the following steps: the clean scrap steel special for the cord thread is used for BOF smelting, and the total amount accounts for 10-30% of the total metal loading amount of the BOF converter; when the silicomanganese oxidation period of about 5 +/-1 min of converter blowing is finished, lifting the gun, pouring out the P-removed slag, putting the gun again and slagging to ensure that the P content of the steel is less than or equal to 0.010 percent; in the tapping process, slag blocking of the slag blocking cone is matched with slag blocking of the sliding plate, and meanwhile, a slag discharge detection technology is matched, so that the slag discharge amount in the tapping process is controlled to be less than or equal to 50 kg.
4. The method for controlling segregation and net carbon of 86-level high strength cord steel wire rod according to claim 1, wherein: in the continuous casting CC process, a 10-machine 10-flow arc continuous casting machine is adopted to prepare a casting blank, the arc radius of the casting machine is 10m, and the tail end electromagnetic stirring distance is 7.2m from a meniscus. The length of the tail end electromagnetic stirring equipment is 700mm, and the inner diameter of the tail end electromagnetic stirring equipment
5. The method for controlling segregation and net carbon of 86-level high strength cord steel wire rod according to claim 1, wherein: the secondary cooling full water forced cooling method in the continuous casting CC procedure comprises the following steps: the cooling water flow changes of different second cooling sections are set as follows: the foot roller section is 9.0-11.0 m311.0-13.0 m in the second cooling 1 section3A second cooling 2 stage of 8.0 to 10.0m32.5-4.5 m in a second cooling 3 section3The air cooling section is added with 1 section of full water cooling area with the length of 1.5m and the water flow is controlled to be 1.5-3.5 m3/h。
6. The method for controlling segregation and net carbon of 86-level high strength cord steel wire rod according to claim 1, wherein: in the controlled cooling process, the fan is a centrifugal fan, and the air volume is 200000m3H, starting 8 fans during productionThe air volume of the 1 st to 3 rd fans along the advancing direction of the wire rod is controlled to be 90 percent, the air volume of the 4 th to 6 th fans is 80 percent, the temperature of the wire rod rapidly passes through a secondary cementite precipitation temperature interval, then the wire rod is subjected to phase change at the 7 th and 8 th fans, and the air volume of the 7 th and 8 th fans is adjusted to be 70 percent.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105232.5A CN112359277B (en) | 2020-10-15 | 2020-10-15 | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod |
| PCT/CN2021/109957 WO2022078018A1 (en) | 2020-10-15 | 2021-08-02 | Control method for segregation and net carbide of 86-grade high-strength cord steel wire rod |
| JP2023513991A JP7479567B2 (en) | 2020-10-15 | 2021-08-02 | Method for controlling segregation and network carbide in 86-grade high-strength cord steel wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105232.5A CN112359277B (en) | 2020-10-15 | 2020-10-15 | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112359277A true CN112359277A (en) | 2021-02-12 |
| CN112359277B CN112359277B (en) | 2021-12-17 |
Family
ID=74507429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011105232.5A Active CN112359277B (en) | 2020-10-15 | 2020-10-15 | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7479567B2 (en) |
| CN (1) | CN112359277B (en) |
| WO (1) | WO2022078018A1 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112760552A (en) * | 2020-12-23 | 2021-05-07 | 安阳钢铁股份有限公司 | Production method of steel for tire bead steel wire |
| CN113308638A (en) * | 2021-05-27 | 2021-08-27 | 江苏永钢集团有限公司 | Cord steel disc and abnormal structure improvement method thereof |
| CN113718171A (en) * | 2021-07-19 | 2021-11-30 | 武汉钢铁有限公司 | 70-grade high-performance cord steel and rolling process thereof |
| CN113714281A (en) * | 2021-08-28 | 2021-11-30 | 金鼎重工有限公司 | Method for producing phi 22mm large-size hot-rolled wire rod |
| CN113751683A (en) * | 2021-09-08 | 2021-12-07 | 天津市新天钢钢铁集团有限公司 | Method for improving internal quality of SWRH82B billet |
| CN113789465A (en) * | 2021-08-11 | 2021-12-14 | 武汉钢铁有限公司 | 92-grade cord steel with coarse wire breaking rate lower than 5 times per kiloton and production method thereof |
| CN113789466A (en) * | 2021-08-11 | 2021-12-14 | 武汉钢铁有限公司 | 82-grade cord steel with coarse wire breaking rate lower than 3 times per kiloton and production method thereof |
| CN113862564A (en) * | 2021-09-16 | 2021-12-31 | 湖南华菱湘潭钢铁有限公司 | Production method of deep-drawing high-carbon steel wire rod |
| CN113913681A (en) * | 2021-08-26 | 2022-01-11 | 武汉钢铁有限公司 | High-strength low-wire-breakage-rate cord steel, rolling method and application thereof |
| WO2022078018A1 (en) * | 2020-10-15 | 2022-04-21 | 中天钢铁集团有限公司 | Control method for segregation and net carbide of 86-grade high-strength cord steel wire rod |
| CN114395723A (en) * | 2021-11-25 | 2022-04-26 | 河南济源钢铁(集团)有限公司 | Chromium-free SWRH82B high-carbon steel wire rod and production method thereof |
| CN114990446A (en) * | 2022-06-21 | 2022-09-02 | 湖南华菱湘潭钢铁有限公司 | Production method of weather-resistant high-strength high-carbon steel |
| CN115976415A (en) * | 2022-12-30 | 2023-04-18 | 江苏永钢集团有限公司 | Ultra-high strength 85-grade cord steel wire rod and production method thereof |
| WO2023165008A1 (en) * | 2022-03-27 | 2023-09-07 | 中天钢铁集团有限公司 | Low-carbon and energy-saving production method for 2,060-mpa-grade-or-higher wire rod for bridge cable |
| CN116891977A (en) * | 2023-09-04 | 2023-10-17 | 江苏永钢集团有限公司 | Wire rod for extra-high-strength diamond wire bus and production method thereof |
| CN117925988A (en) * | 2024-03-22 | 2024-04-26 | 星泓智造装备有限公司 | High-performance wind power tower flange and heat treatment shape control and control method thereof |
| CN118563068A (en) * | 2024-08-05 | 2024-08-30 | 江苏永钢集团有限公司 | Extra-high-strength 90-grade cord steel wire rod and production method thereof |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774794B (en) * | 2022-05-07 | 2023-03-28 | 张家港荣盛特钢有限公司 | Cord steel and method for modifying inclusion of cord steel |
| CN115007821B (en) * | 2022-05-07 | 2024-07-12 | 建龙北满特殊钢有限责任公司 | Bloom GCr15SiMn bearing steel and smelting method thereof |
| CN114990437B (en) * | 2022-05-25 | 2023-07-04 | 张家港荣盛特钢有限公司 | Cold heading steel wire rod and production method thereof |
| CN115161558B (en) * | 2022-07-12 | 2024-04-16 | 鞍钢股份有限公司 | Wire rod for ultra-high strength steel wire cord, steel wire, cord and manufacturing method |
| CN115161559B (en) * | 2022-07-12 | 2024-04-16 | 鞍钢股份有限公司 | Torsion fracture resistant ultra-high strength steel wire, wire rod for steel wire and manufacturing process |
| CN115491588A (en) * | 2022-07-26 | 2022-12-20 | 邢台钢铁有限责任公司 | Production method of high-speed wire for low-strain aging electronic lead |
| CN115637310A (en) * | 2022-11-09 | 2023-01-24 | 芜湖新兴铸管有限责任公司 | Process improvement method for improving quality of axle steel product |
| CN115927962A (en) * | 2022-12-05 | 2023-04-07 | 宝武杰富意特殊钢有限公司 | Steel for mandrel bar and method for producing same |
| CN116875874B (en) * | 2023-07-10 | 2023-12-26 | 辛集市澳森特钢集团有限公司 | Production method of 8.8-grade steel for fastener easy to heat treat |
| CN116875912B (en) * | 2023-09-07 | 2024-03-19 | 张家港荣盛特钢有限公司 | High-purity high-carbon steel wire rod and production method thereof |
| CN117127122B (en) * | 2023-10-27 | 2024-01-23 | 张家港荣盛特钢有限公司 | Fatigue-resistant spring steel wire, wire rod and production method of wire rod |
| CN117840395B (en) * | 2024-03-07 | 2024-05-03 | 江苏省沙钢钢铁研究院有限公司 | Casting blank quality control method of low-temperature steel and plate production method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
| CN101775461A (en) * | 2010-01-19 | 2010-07-14 | 南京钢铁股份有限公司 | Method for improving central carbon segregation of tire cord steel |
| CN105127386A (en) * | 2015-08-19 | 2015-12-09 | 河北钢铁股份有限公司 | Continuous casting method for controlling center carbon segregation of small high-carbon hard-wire steel square billet |
| US20170037491A1 (en) * | 2014-04-24 | 2017-02-09 | Nippon Steel & Sumitomo Metal Corporation | Wire rod for high strength steel cord |
| US20170175221A1 (en) * | 2014-02-11 | 2017-06-22 | Institute Of Research Of Iron And Steel, Jiangsu Province/Sha-Steel, Co. Ltd | High-carbon steel wire rod and preparation method therefor |
| CN107186192A (en) * | 2017-04-26 | 2017-09-22 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting method for improving segregation of billet cord steel |
| CN109047697A (en) * | 2018-09-25 | 2018-12-21 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of tyre cord steel |
| CN110629132A (en) * | 2019-09-26 | 2019-12-31 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for ultra-high strength steel cord and method for producing same |
| CN111687209A (en) * | 2020-05-13 | 2020-09-22 | 中天钢铁集团有限公司 | Rolling process of medium-carbon high-sulfur alloy steel wire rod |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844739B2 (en) * | 1977-09-06 | 1983-10-05 | 三菱製鋼株式会社 | Steel that withstands aluminum attack |
| JP4646850B2 (en) | 2006-04-28 | 2011-03-09 | 株式会社神戸製鋼所 | High carbon steel wire rod with excellent resistance to breakage of copper |
| EP3144404A4 (en) | 2014-04-24 | 2018-01-17 | Nippon Steel & Sumitomo Metal Corporation | Filament for high strength steel cord |
| CN104789880B (en) | 2015-03-03 | 2017-03-22 | 张家港联峰钢铁研究所有限公司 | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof |
| CN111254363A (en) | 2020-03-31 | 2020-06-09 | 湖南华菱湘潭钢铁有限公司 | Production method of cord wire rod steel |
| CN112359277B (en) * | 2020-10-15 | 2021-12-17 | 中天钢铁集团有限公司 | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod |
-
2020
- 2020-10-15 CN CN202011105232.5A patent/CN112359277B/en active Active
-
2021
- 2021-08-02 WO PCT/CN2021/109957 patent/WO2022078018A1/en active Application Filing
- 2021-08-02 JP JP2023513991A patent/JP7479567B2/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
| CN101775461A (en) * | 2010-01-19 | 2010-07-14 | 南京钢铁股份有限公司 | Method for improving central carbon segregation of tire cord steel |
| US20170175221A1 (en) * | 2014-02-11 | 2017-06-22 | Institute Of Research Of Iron And Steel, Jiangsu Province/Sha-Steel, Co. Ltd | High-carbon steel wire rod and preparation method therefor |
| US20170037491A1 (en) * | 2014-04-24 | 2017-02-09 | Nippon Steel & Sumitomo Metal Corporation | Wire rod for high strength steel cord |
| CN105127386A (en) * | 2015-08-19 | 2015-12-09 | 河北钢铁股份有限公司 | Continuous casting method for controlling center carbon segregation of small high-carbon hard-wire steel square billet |
| CN107186192A (en) * | 2017-04-26 | 2017-09-22 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting method for improving segregation of billet cord steel |
| CN109047697A (en) * | 2018-09-25 | 2018-12-21 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of tyre cord steel |
| CN110629132A (en) * | 2019-09-26 | 2019-12-31 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for ultra-high strength steel cord and method for producing same |
| CN111687209A (en) * | 2020-05-13 | 2020-09-22 | 中天钢铁集团有限公司 | Rolling process of medium-carbon high-sulfur alloy steel wire rod |
Non-Patent Citations (3)
| Title |
|---|
| 卢伟永: "帘线钢关键质量指标及检测方法浅析", 《冶金与材料》 * |
| 廖舒纶 等: "改善帘线钢网状碳化物级别的试验研究", 《第九届中国钢铁年会论文集》 * |
| 王新江: "工艺参数对帘线钢组织性能影响探讨", 《纪念《金属制品》创刊40周年暨2012年金属制品行业技术信息交流会论文集》 * |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022078018A1 (en) * | 2020-10-15 | 2022-04-21 | 中天钢铁集团有限公司 | Control method for segregation and net carbide of 86-grade high-strength cord steel wire rod |
| CN112760552B (en) * | 2020-12-23 | 2022-03-11 | 安阳钢铁股份有限公司 | Production method of steel for tire bead steel wire |
| CN112760552A (en) * | 2020-12-23 | 2021-05-07 | 安阳钢铁股份有限公司 | Production method of steel for tire bead steel wire |
| CN113308638A (en) * | 2021-05-27 | 2021-08-27 | 江苏永钢集团有限公司 | Cord steel disc and abnormal structure improvement method thereof |
| CN113718171A (en) * | 2021-07-19 | 2021-11-30 | 武汉钢铁有限公司 | 70-grade high-performance cord steel and rolling process thereof |
| CN113789465B (en) * | 2021-08-11 | 2022-05-03 | 武汉钢铁有限公司 | 92-grade cord steel with coarse wire breaking rate lower than 5 times per kiloton and production method thereof |
| CN113789466B (en) * | 2021-08-11 | 2022-05-03 | 武汉钢铁有限公司 | 82-grade cord steel with coarse wire breaking rate lower than 3 times per kiloton and production method thereof |
| CN113789465A (en) * | 2021-08-11 | 2021-12-14 | 武汉钢铁有限公司 | 92-grade cord steel with coarse wire breaking rate lower than 5 times per kiloton and production method thereof |
| CN113789466A (en) * | 2021-08-11 | 2021-12-14 | 武汉钢铁有限公司 | 82-grade cord steel with coarse wire breaking rate lower than 3 times per kiloton and production method thereof |
| CN113913681B (en) * | 2021-08-26 | 2022-03-25 | 武汉钢铁有限公司 | High-strength low-wire-breakage-rate cord steel, rolling method and application thereof |
| CN113913681A (en) * | 2021-08-26 | 2022-01-11 | 武汉钢铁有限公司 | High-strength low-wire-breakage-rate cord steel, rolling method and application thereof |
| CN113714281A (en) * | 2021-08-28 | 2021-11-30 | 金鼎重工有限公司 | Method for producing phi 22mm large-size hot-rolled wire rod |
| CN113751683A (en) * | 2021-09-08 | 2021-12-07 | 天津市新天钢钢铁集团有限公司 | Method for improving internal quality of SWRH82B billet |
| CN113862564A (en) * | 2021-09-16 | 2021-12-31 | 湖南华菱湘潭钢铁有限公司 | Production method of deep-drawing high-carbon steel wire rod |
| CN114395723A (en) * | 2021-11-25 | 2022-04-26 | 河南济源钢铁(集团)有限公司 | Chromium-free SWRH82B high-carbon steel wire rod and production method thereof |
| WO2023165008A1 (en) * | 2022-03-27 | 2023-09-07 | 中天钢铁集团有限公司 | Low-carbon and energy-saving production method for 2,060-mpa-grade-or-higher wire rod for bridge cable |
| CN114990446A (en) * | 2022-06-21 | 2022-09-02 | 湖南华菱湘潭钢铁有限公司 | Production method of weather-resistant high-strength high-carbon steel |
| CN115976415A (en) * | 2022-12-30 | 2023-04-18 | 江苏永钢集团有限公司 | Ultra-high strength 85-grade cord steel wire rod and production method thereof |
| CN116891977A (en) * | 2023-09-04 | 2023-10-17 | 江苏永钢集团有限公司 | Wire rod for extra-high-strength diamond wire bus and production method thereof |
| CN116891977B (en) * | 2023-09-04 | 2023-11-21 | 江苏永钢集团有限公司 | Wire rod for extra-high-strength diamond wire bus and production method thereof |
| CN117925988A (en) * | 2024-03-22 | 2024-04-26 | 星泓智造装备有限公司 | High-performance wind power tower flange and heat treatment shape control and control method thereof |
| CN117925988B (en) * | 2024-03-22 | 2024-06-04 | 星泓智造装备有限公司 | High-performance wind power tower flange and heat treatment shape control and control method thereof |
| CN118563068A (en) * | 2024-08-05 | 2024-08-30 | 江苏永钢集团有限公司 | Extra-high-strength 90-grade cord steel wire rod and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112359277B (en) | 2021-12-17 |
| JP7479567B2 (en) | 2024-05-08 |
| JP2023539662A (en) | 2023-09-15 |
| WO2022078018A1 (en) | 2022-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112359277B (en) | Control method for segregation and net carbon of 86-level high-strength cord steel wire rod | |
| EP4019658B1 (en) | Wire rod for ultrahigh-strength steel cord and manufacturing method therefor | |
| CN113088818B (en) | Ultra-high strength steel cord, wire rod for ultra-high strength steel cord and production method thereof | |
| CN103160729B (en) | Medium-carbon microalloyed steel for engineering machinery caterpillar chain piece and production process thereof | |
| CN110157988B (en) | Steel alloy material for high-purity homogeneous rare earth cold roll and preparation method thereof | |
| CN112342452B (en) | Manufacturing method of high-strength wire rod for tire bead steel wire | |
| CN114318154B (en) | High-cleanliness welding wire steel L-S3 and preparation method thereof | |
| CN114318149A (en) | Grade 102 steel cord, grade 102 cord steel wire rod and production method thereof | |
| CN102925806B (en) | Y55 mark free-cutting steel plate and manufacture method thereof | |
| CN112792122A (en) | Production method of direct cold-drawing spring steel wire with low cost and excellent comprehensive performance | |
| CN115055654B (en) | High-carbon steel wire rod and production method thereof | |
| CN106011381A (en) | Molten steel out-of-furnace dephosphorization production technology | |
| CN102560252A (en) | Steel for medium-carbon Cr alloying connecting rod and manufacturing method of steel | |
| CN114182157A (en) | Preparation method of hot-rolled steel strip for elastic check ring | |
| CN111254359A (en) | Corrosion-resistant rare earth bearing steel and preparation method thereof | |
| CN106011671B (en) | A kind of production method of H13 continuous casting square billets | |
| CN115261564A (en) | Non-aluminum deoxidation raw material pure iron for amorphous soft magnetic thin strip and preparation method thereof | |
| CN114657313A (en) | Production method of high-chromium high-strength mining steel strand wire rod | |
| CN102899563B (en) | A kind of production method of ultra-high strength steel plate | |
| CN113862552A (en) | Steel wire rod for welding and preparation method thereof | |
| CN114657471B (en) | Production method of low-carbon energy-saving wire rod for bridge cable rope with pressure of not less than 2060MPa | |
| CN112391573B (en) | Smelting method of titanium microalloyed No. 45 steel extra-thick plate | |
| CN114737138B (en) | High-mirror-surface high-toughness oversized-section ZW863 die steel | |
| CN110777302B (en) | Method for producing 2GPa hot forming steel by FTSC thin slab production line | |
| CN116000254A (en) | Method for preparing D2 steel bar and wire by arc continuous casting and rolling process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231226 Address after: 213000 No. 1 Zhongwu Avenue, Changzhou City, Jiangsu Province Patentee after: Zenith Steel Group Co.,Ltd. Patentee after: Changzhou Zhongtian Special Steel Co.,Ltd. Patentee after: Zhongtian Iron and Steel Group (Huai'an) New Materials Co.,Ltd. Address before: 213000 No. 1 Zhongwu Avenue, Changzhou City, Jiangsu Province Patentee before: Zenith Steel Group Co.,Ltd. Patentee before: Changzhou Zhongtian Special Steel Co.,Ltd. |
|
| TR01 | Transfer of patent right |