CN114959416A - Method for controlling low-carbon wire drawing material to scar - Google Patents
Method for controlling low-carbon wire drawing material to scar Download PDFInfo
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- CN114959416A CN114959416A CN202210567634.XA CN202210567634A CN114959416A CN 114959416 A CN114959416 A CN 114959416A CN 202210567634 A CN202210567634 A CN 202210567634A CN 114959416 A CN114959416 A CN 114959416A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 10
- 238000005491 wire drawing Methods 0.000 title claims abstract description 9
- 231100000241 scar Toxicity 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 239000002893 slag Substances 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 206010039509 Scab Diseases 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009749 continuous casting Methods 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 238000005266 casting Methods 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 238000007670 refining Methods 0.000 claims abstract description 11
- 238000005275 alloying Methods 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 9
- 239000011572 manganese Substances 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 239000005997 Calcium carbide Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 8
- 230000003749 cleanliness Effects 0.000 abstract description 7
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 238000009847 ladle furnace Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- 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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
Abstract
The invention discloses a method for controlling low-carbon wire drawing material scab, which relates to the technical field of steel making, and comprises the steps of adding high-quality scrap steel, controlling the end-point oxygen concentration and the end-point carbon content, carrying out post-treatment on top slag after deoxidation alloying, controlling the on-station time of refining, controlling the on-station oxygen concentration of refining after converter alloying, controlling the oxygen concentration of refining out-station, controlling the chemical components of the low-carbon wire drawing material, adopting the whole-process protection casting operation and the rough rolling temperature in the continuous casting process, and adding an iron oxide scale removing device before rough rolling to carry out iron scale removing treatment on a casting blank; through controlling the raw materials entering the furnace, the components at the end point, the oxygen at the end point and the carbon at the end point, the cleanliness of molten steel can be improved, the internal and external quality of a casting blank can be improved, qualified raw materials are provided for rolling, the scab quantity is controlled, and through controlling the rolling procedure, an iron oxide scale removing device is additionally arranged before rough rolling to remove iron scale from the casting blank, so that the scab quantity can be reduced.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a method for controlling low-carbon wire drawing materials to scab.
Background
In the existing production process of low-carbon wire drawing materials, a heating agent is added in a converter smelting process to improve heat, the addition amount of scrap steel is generally more than 25% in a low iron consumption mode, harmful elements are difficult to accurately control due to large component difference of the heating agent, molten steel cleanliness is directly influenced, the addition amount of scrap steel is large, the harmful elements in the molten steel are difficult to control, the molten steel cleanliness is influenced, and further, in the continuous casting high-speed production process, the floating time of impurities in a tundish is short, the molten steel cleanliness is poor, and the risk of scabbing is increased. Therefore, the invention provides a method for controlling the scab of the low-carbon drawn wire, which aims to overcome the defects in the prior art.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for controlling scab of a low-carbon wire rod, which can improve molten steel cleanliness by controlling a raw material entering a furnace, a terminal component, a terminal oxygen, and a terminal carbon, thereby improving the quality of the inside and outside of a casting blank, providing a qualified raw material for rolling, controlling the amount of the scab, and reducing the amount of the scab by controlling a rolling program and adding an iron oxide scale removing device to the casting blank before rough rolling.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for controlling low-carbon drawing wire scabbing comprises the following steps:
the method comprises the following steps: improving the purity of molten steel, adding high-quality scrap steel under a low iron consumption mode, controlling the end point oxygen concentration to be below 600PPm, and controlling the end point carbon content to be above 0.035%;
step two: reasonably controlling tapping time according to the size of the converter, and carrying out post-treatment on top slag after deoxidation alloying;
step three: controlling the refining time to be more than 15min, and performing soft blowing treatment after molten steel purification treatment;
step four: controlling the concentration of refined inlet oxygen to be less than 120PPm after alloying of the converter and controlling the concentration of refined outlet oxygen to be 8-40 PPm;
step five: the chemical components of the low-carbon wire drawing material are controlled as follows: the carbon content is less than or equal to 0.12 percent, the silicon content is less than or equal to 0.20 percent, the manganese content is less than or equal to 0.55 percent, the phosphorus content is less than or equal to 0.035 percent, and the sulfur content is less than or equal to 0.040 percent;
step six: the continuous casting process adopts the whole-course protection casting operation, and the continuous casting blank is cut in a hydraulic shear mode or a flame cutting mode;
step seven: and controlling the rough rolling temperature to be 950-1000 ℃, and adding an iron oxide scale removing device to remove iron oxide scales from the casting blank before rough rolling.
The further improvement lies in that: when the high-quality steel scrap is added in the first step, the high-quality steel scrap needs to be pretreated, and the method specifically comprises the following steps: and removing impurities from the high-quality steel scrap to remove surface impurities, and drying the high-quality steel scrap after impurity removal to ensure that the content rate of the high-quality steel scrap is lower than 1%.
The further improvement lies in that: the post-treatment process of the top slag in the second step comprises the following steps: adding calcium carbide or raw dolomite powder to pre-deoxidize and thicken the top slag, and controlling the slag viscosity of the top slag to be 0.02-0.10 Pa.s.
The further improvement lies in that: and when soft blowing is carried out in the third step, the soft blowing time is controlled to be more than 5min, and refining operation needs to be carried out synchronously with slag deoxidation and molten steel deoxidation.
The further improvement lies in that: and in the fourth step, when the oxygen concentration of the refining station is not 8-40 PPm, the molten steel needs to be transferred into an LF furnace for secondary deoxidation treatment.
The further improvement lies in that: in the fifth step, the internal control amount of the carbon content is 0.04-0.06%, the internal control amount of the silicon content is 0.02-0.06%, the internal control amount of the manganese content is 0.15-0.30%, the internal control amount of the phosphorus content is less than or equal to 0.020%, and the internal control amount of the sulfur content is less than or equal to 0.020%.
The further improvement lies in that: when the continuous casting process in the sixth step adopts the whole-course protection casting operation, the liquid level of the crystallizer needs to be ensured to be stable, a reasonable tundish slag structure needs to be ensured, slag discharging treatment needs to be carried out in time when the tundish slag amount is large, and the building height of the continuous casting slag stopping wall needs to meet the slag discharging requirement of the tundish, so that slag discharging is facilitated; when the flame cutting mode is adopted for cutting the continuous casting billet, the cutting slag needs to be cleaned in time in the cutting process, and the cleaned cutting is sent to the steel rolling.
The further improvement lies in that: in the six-step continuous casting process, the superheat degree of the molten steel of the tundish needs to be controlled to be 20-30 ℃, when the superheat degree fluctuates, the withdrawal speed needs to be adjusted in a micro-scale mode strictly according to the process requirements, and the adjustment amount is not more than 0.1m/min each time.
The further improvement lies in that: in the seven rough rolling process, the discharging roller table needs to be controlled not to have accumulated slag and burrs
The invention has the beneficial effects that: according to the method, the cleanliness of the molten steel can be improved by controlling the raw materials entering the furnace, the end point components, the end point oxygen and the end point carbon, so that the internal and external quality of the casting blank can be improved, qualified raw materials are provided for rolling, the scab quantity is controlled, and the iron scale removing device is additionally arranged before rough rolling by controlling the rolling program to remove the iron scale of the casting blank, so that the scab quantity can be reduced.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
According to the illustration in FIG. 1, the embodiment proposes a method for controlling scab of a low-carbon drawn wire material, which comprises the following steps:
the method comprises the following steps: the method has the advantages that the purity of the molten steel is improved, high-quality scrap steel is added under a low iron loss mode, and the high-quality scrap steel needs to be pretreated when being added, and the method specifically comprises the following steps: removing impurities from high-quality scrap steel, removing surface impurities, drying the high-quality scrap steel after impurity removal, ensuring that the content rate of the high-quality scrap steel is lower than 1%, mainly smelting by a carbon drawing method, ensuring the first-falling hit rate, adopting high-drawing complementary blowing under abnormal conditions, controlling the end-point oxygen concentration to be below 600PPm, and controlling the end-point carbon content to be above 0.035%;
step two: the tapping time is reasonably controlled according to the size of the converter, and after-treatment is carried out on top slag after deoxidation alloying, the process is as follows: adding calcium carbide or raw dolomite powder to pre-deoxidize and thicken the top slag, and controlling the slag viscosity of the top slag to be 0.06 Pa.s;
step three: controlling the refining on-site time to be more than 15min, performing soft blowing treatment after molten steel purification treatment, controlling the soft blowing time to be more than 5min, and performing refining operation synchronously with slag deoxidation and molten steel deoxidation;
step four: controlling the concentration of refined incoming oxygen to be less than 120PPm and the concentration of refined outgoing oxygen to be 8-40 PPm after alloying in the converter, and transferring the molten steel into an LF (ladle furnace) for secondary deoxidation treatment when the concentration of the refined outgoing oxygen is not 8-40 PPm;
step five: the chemical components of the low-carbon wire drawing material are controlled as follows: the carbon content is less than or equal to 0.12 percent, the silicon content is less than or equal to 0.20 percent, the manganese content is less than or equal to 0.55 percent, the phosphorus content is less than or equal to 0.035 percent, the sulfur content is less than or equal to 0.040 percent, the internal control quantity of the carbon content is 0.04-0.06 percent, the internal control quantity of the silicon content is 0.02-0.06 percent, the internal control quantity of the manganese content is 0.15-0.30 percent, the internal control quantity of the phosphorus content is less than or equal to 0.020 percent, the internal control quantity of the sulfur content is less than or equal to 0.020 percent, and the concrete formula is shown in the following table 1:
TABLE 1
| C，％ | Si，％ | Mn，％ | P，％ | S，％ | |
| Standard of merit | ≤0.12 | ≤0.20 | ≤0.55 | ≤0.035 | ≤0.040 |
| Internal control | 0.04-0.06 | 0.02-0.06 | 0.15-0.30 | ≤0.020 | ≤0.020 |
Step six: the continuous casting process adopts the whole-process protection casting operation, the liquid level of the crystallizer needs to be ensured to be stable, a reasonable tundish slag structure needs to be ensured, slag discharging treatment needs to be carried out in time when the tundish slag quantity is large, the building height of a continuous casting slag wall needs to meet the slag discharging requirement of the tundish, so that the slag discharging is facilitated, the superheat degree of molten steel of the tundish needs to be controlled to be 25 ℃ in the continuous casting process, when the superheat degree fluctuates, the blank drawing speed needs to be adjusted in a micro-scale manner strictly according to the process requirement, and the adjustment quantity is no more than 0.1m/min each time; the method comprises the following steps that a continuous casting blank is cut in a hydraulic shear mode or a flame cutting mode, when the continuous casting blank is cut in the flame cutting mode, cutting slag needs to be cleaned in time in the cutting process, and the cleaned cutting bundle is sent to steel rolling;
step seven: the rough rolling temperature is controlled to be 980 ℃, an iron scale removing device is additionally arranged before rough rolling to remove iron scales from the casting blank, and the discharge roller table needs to be controlled to have no accumulated slag and burrs.
According to the method, the cleanliness of the molten steel can be improved by controlling the raw materials entering the furnace, the end point components, the end point oxygen and the end point carbon, so that the internal and external quality of the casting blank can be improved, qualified raw materials are provided for rolling, the scab quantity is controlled, and the iron scale removing device is additionally arranged before rough rolling by controlling the rolling program to remove the iron scale of the casting blank, so that the scab quantity can be reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A method for controlling low-carbon drawing wire scabbing is characterized by comprising the following steps:
the method comprises the following steps: improving the purity of molten steel, adding high-quality scrap steel under a low iron consumption mode, controlling the end point oxygen concentration to be below 600PPm, and controlling the end point carbon content to be above 0.035%;
step two: reasonably controlling tapping time according to the size of the converter, and carrying out post-treatment on top slag after deoxidation alloying;
step three: controlling the refining time to be more than 15min, and performing soft blowing treatment after molten steel purification treatment;
step four: controlling the concentration of refined inlet oxygen to be less than 120PPm after alloying of the converter and controlling the concentration of refined outlet oxygen to be 8-40 PPm;
step five: the chemical components of the low-carbon wire drawing material are controlled as follows: the carbon content is less than or equal to 0.12 percent, the silicon content is less than or equal to 0.20 percent, the manganese content is less than or equal to 0.55 percent, the phosphorus content is less than or equal to 0.035 percent, and the sulfur content is less than or equal to 0.040 percent;
step six: the continuous casting process adopts the whole-course protection casting operation, and the continuous casting blank is cut in a hydraulic shear mode or a flame cutting mode;
step seven: and controlling the rough rolling temperature to be 950-1000 ℃, and adding an iron oxide scale removing device to remove iron oxide scales from the casting blank before rough rolling.
2. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: when the high-quality steel scrap is added in the first step, the high-quality steel scrap needs to be pretreated, and the method specifically comprises the following steps: and removing impurities from the high-quality scrap steel, removing surface impurities, and drying the high-quality scrap steel after impurity removal, so that the content rate of the high-quality scrap steel is lower than 1%.
3. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: the post-treatment process of the top slag in the second step comprises the following steps: adding calcium carbide or raw dolomite powder to pre-deoxidize and thicken the top slag, and controlling the slag viscosity of the top slag to be 0.02-0.10 Pa.s.
4. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: and when soft blowing is carried out in the third step, the soft blowing time is controlled to be more than 5min, and refining operation needs to be carried out synchronously with slag deoxidation and molten steel deoxidation.
5. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: and in the fourth step, when the oxygen concentration of the refining station is not 8-40 PPm, the molten steel needs to be transferred into an LF furnace for secondary deoxidation treatment.
6. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: in the fifth step, the internal control amount of the carbon content is 0.04-0.06%, the internal control amount of the silicon content is 0.02-0.06%, the internal control amount of the manganese content is 0.15-0.30%, the internal control amount of the phosphorus content is less than or equal to 0.020%, and the internal control amount of the sulfur content is less than or equal to 0.020%.
7. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: when the continuous casting process in the sixth step adopts the whole-course protection casting operation, the liquid level of the crystallizer needs to be ensured to be stable, a reasonable tundish slag structure needs to be ensured, slag discharging treatment needs to be carried out in time when the tundish slag amount is large, and the building height of the continuous casting slag stopping wall needs to meet the slag discharging requirement of the tundish, so that slag discharging is facilitated; when the flame cutting mode is adopted for cutting the continuous casting billet, the cutting slag needs to be cleaned in time in the cutting process, and the cleaned cutting is sent to the steel rolling.
8. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: in the six-step continuous casting process, the superheat degree of the molten steel of the tundish needs to be controlled to be 20-30 ℃, when the superheat degree fluctuates, the withdrawal speed needs to be adjusted in a micro-scale mode strictly according to the process requirements, and the adjustment amount is not more than 0.1m/min each time.
9. The method for controlling the scab of the low-carbon drawn wire according to claim 1, wherein: and in the seven-step rough rolling process, the discharging roller table needs to be controlled to have no accumulated slag and burrs.
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| CN101245432A (en) * | 2007-07-06 | 2008-08-20 | 天津钢铁有限公司 | Technique for producing wire rod for low carbon drawn wire |
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| CN111424204A (en) * | 2018-01-31 | 2020-07-17 | 日照钢铁控股集团有限公司 | Production process of calcium-treatment-free low-carbon silicon-containing killed clean steel |
| WO2022083217A1 (en) * | 2020-10-19 | 2022-04-28 | 中天钢铁集团有限公司 | Method for producing free-cutting steel hot-rolled wire rod for oa shaft |
-
2022
- 2022-05-24 CN CN202210567634.XA patent/CN114959416A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101245432A (en) * | 2007-07-06 | 2008-08-20 | 天津钢铁有限公司 | Technique for producing wire rod for low carbon drawn wire |
| US20130056167A1 (en) * | 2010-06-23 | 2013-03-07 | Feng Zhang | Method for controlling extremely low ti in extra low carbon alsi-killed steel |
| CN102041444A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Low-carbon low-silicon high-quality carbon structural steel and production method thereof |
| CN105603145A (en) * | 2016-01-07 | 2016-05-25 | 唐山钢铁集团有限责任公司 | Method for rectangular continuous casting production of low-carbon low-silicon steel |
| CN111424204A (en) * | 2018-01-31 | 2020-07-17 | 日照钢铁控股集团有限公司 | Production process of calcium-treatment-free low-carbon silicon-containing killed clean steel |
| WO2022083217A1 (en) * | 2020-10-19 | 2022-04-28 | 中天钢铁集团有限公司 | Method for producing free-cutting steel hot-rolled wire rod for oa shaft |
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Application publication date: 20220830 |