CN110747386A - Easy-to-pull cord steel wire rod and production method thereof - Google Patents
Easy-to-pull cord steel wire rod and production method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 230000007547 defect Effects 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- 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
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 18
- 230000023556 desulfurization Effects 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 18
- 238000007670 refining Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 10
- 230000010485 coping Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 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 4
- 238000003825 pressing Methods 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
Classifications
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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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- 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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
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- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses an easy-to-draw cord steel wire rod and a production method thereof, wherein the rough drawing speed of the cord steel wire rod is 8-10m/s, the middle drawing speed is 18-22m/s, the wet drawing speed is 18-20m/s, and the filament breakage rate is less than or equal to 1 time/100 t. The quality of molten iron and scrap steel entering a furnace is strictly controlled, and reasonable molten steel superheat degree, continuous casting cooling strength, heavy pressing amount, grinding process and high-speed wire rolling cooling system are set, so that the wire rod reticular cementite is less than or equal to 1.0 grade, the sorbite rate is greater than or equal to 95 percent, the pro-eutectoid ferrite is less than 0.5 percent, the strength fluctuation range is less than or equal to 15MPa, the surface defect depth is less than or equal to 0.05mm, and the defect ratio is less than or equal to 0.8 percent.
Description
Technical Field
The application belongs to the technical field of cord steel production, and particularly relates to an easily pulled cord steel wire rod and a production method thereof.
Background
The high-speed drawing ensures lower wire breakage rate, can obviously improve the production efficiency and reduce the processing cost, thereby being the technical development trend in the wire processing field.
High speed drawing places higher demands on the quality level of the wire rod. For example, high-speed drawing has very high requirements on continuity and uniformity of the structure of the wire rod, and stress is not uniform at a certain position of the wire rod in the high-speed drawing process, so that stress concentration is easily generated at a weak link, and then a radial shrinkage broken wire is generated; the minute defects do not affect the stress conduction at a low strain rate, but the minute defects obstruct the stress transmission when drawing at a high speed to generate stress concentration at the defects to cause the breakage of the wire. Therefore, the higher the drawing speed, the higher the requirement for the structural uniformity of the wire rod. Cleanliness, center segregation and surface defects are the main factors that contribute to tissue continuity and uniformity.
The cord steel is a representative product of ultra-clean steel and a symbolic product of the quality level of wire rods of steel enterprises, is known as 'best quality in wire rods' and 'bright pearl on crown of wire rods', and is mainly used for manufacturing tire meridian lines. The cord steel produced by the prior art cannot well meet the requirement of high-speed drawing.
Disclosure of Invention
The easy-to-draw cord steel wire rod and the production method provided by the invention have the advantages that the cleanliness of the wire rod is effectively improved, the center segregation degree of the wire rod is reduced, and the surface quality of the wire rod is improved. On the premise of ensuring that the broken wire is not obviously deteriorated, the drawing speed of the cord steel is obviously improved.
An easy-to-draw steel wire rod for cord thread features that its netted cementite is less than or equal to 1.0 grade, its sorbite percentage is greater than or equal to 95%, the proeutectoid ferrite is less than 0.5% and its strength fluctuation range is less than or equal to 15 MPa. The surface defect depth of the wire rod is less than or equal to 0.05mm, the defect ratio (defect length/wire rod length) is less than or equal to 0.8%, the rough drawing speed of the wire rod is 8-10m/s, the middle drawing speed is 18-22m/s, the wet drawing speed is 18-20m/s, and the broken wire rate is less than or equal to 1 time/100 t.
The production method of the easy-to-draw cord steel wire rod comprises molten iron KR desulfurization, converter steelmaking, LF refining, bloom continuous casting, cogging, coping and rolling.
Before molten iron desulphurization, the molten iron requirement is as follows: the temperature is more than or equal to 1350 ℃, S is less than or equal to 0.045%, and Ti is less than or equal to 0.08%; after desulfurization, the molten iron requires: the temperature is more than or equal to 1300 ℃, the S is less than or equal to 0.005 percent, and the Ti is less than or equal to 0.09 percent.
Smelting in a converter, wherein the molten iron ratio is more than or equal to 90%; the steel scrap requirements are as follows: less than or equal to 0.020 percent of S, less than or equal to 0.01 percent of Ti and less than or equal to 0.030 percent of Al; the alkalinity of the converter final slag is 3.5-4.5, the tapping temperature is 1640-.
The alkalinity of LF refining slag is 1.0-1.04, the brown slag time is 25-35min, the soft stirring time is 20-30min, and the molten steel is strictly forbidden to be exposed.
The superheat degree of molten steel is ensured to be 18-28 ℃ during continuous casting; the height of the liquid level of the steel is 80-85%; the pulling speed is 0.60-0.64 m/min; the specific water amount of the secondary cooling is 0.23-0.24L/Kg; the reduction under heavy reduction is more than or equal to 7.5% (reduction as reduction size/casting height).
The casting blank is mechanically and fully ground for at least two times, wherein the first time is ground by a 16-mesh grinding wheel, and the second time is ground by a 24-mesh grinding wheel; high-speed wire rolling, wherein the spinning temperature is 890-920 ℃, and a three-section stelmor cooling system is adopted: and cooling by adopting 100% of air flow between the spinning temperature and 600 ℃, cooling by adopting 30-50% of air flow between 600 ℃ and 500 ℃, and closing the fan and the heat-insulating cover below 500 ℃.
Has the advantages that:
based on conventional production equipment, the purpose of the invention can be realized only by reasonably designing production parameters without additional investment;
the cord steel wire rod produced by the production method provided by the invention has excellent drawing performance, and the drawing speed is improved while the wire breakage rate is ensured to be at a lower level.
Detailed Description
The invention is further illustrated by the following examples: the invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the specific material ratios, process conditions and results thereof described in the examples are illustrative only and should not be taken as limiting the invention as detailed in the claims.
Example 1
The embodiment provides an easy-to-draw cord steel LX72A wire rod, wherein LX72A wire rod reticular cementite is 0 grade, the sorbite percentage is 98 percent, the pro-eutectoid ferrite is 0.1 percent, and the strength fluctuation range is 12 MPa; the surface defect depth of the wire rod is 0.02mm, and the defect ratio is 0.1%. A production method of an easy-to-pull cord steel LX72A wire rod. The method comprises KR desulfurization of molten iron, steelmaking in a converter, LF refining, continuous casting of a bloom, cogging, coping and rolling. The method comprises the following specific steps:
molten iron KR desulfurization process:
molten iron before desulfurization: the temperature is 1360 ℃, the S content is 0.04 percent, and the Ti content is 0.08 percent; molten iron after desulfurization: the temperature is 1310 ℃, the S content is 0.004 percent, and the Ti content is 0.09 percent.
A converter smelting process:
the molten iron ratio is 90 percent; the content of S in the scrap steel is 0.020%, the content of Ti in the scrap steel is 0.008% and the content of Al in the scrap steel is 0.025%; the alkalinity of the converter final slag is 3.5, the tapping temperature is 1645 ℃, the end point carbon content is 0.10 percent, and alloy material and slag material are added when 1/3 steel is tapped.
An LF refining procedure:
the alkalinity of LF refining slag is 1.03, the brown slag time is 30min, the soft stirring time is 25min, and the molten steel is strictly prohibited from being exposed.
And a bloom continuous casting process:
adopting a long water gap, argon sealing, a tundish covering agent and an immersion water gap for protective casting; the superheat degree of the molten steel is 23 ℃; the electromagnetic stirring current of the crystallizer is 750A, and the frequency is 1.5 Hz; the height of the liquid level of the steel is 82 percent; the pulling speed is 0.60 m/min; the secondary cooling water ratio is 0.23L/Kg; the reduction by weight was 7.5% (reduction ═ reduction size/strand height).
The coping process comprises the following steps:
and the casting blank is mechanically and fully ground twice, wherein the first time adopts a 16-mesh grinding wheel for grinding, and the second time adopts a 24-mesh grinding wheel for grinding.
High-speed wire rolling procedure:
the finish rolling inlet temperature is 1000 ℃, the spinning temperature is 900 ℃, and a three-stage stelmor cooling system is adopted: cooling with 100% air flow between the spinning temperature and 600 ℃, cooling with 50% air flow between 600 ℃ and 500 ℃, and closing the fan and the heat-preservation cover below 500 ℃.
Example 2
The embodiment provides an easy-to-draw cord steel LX82A wire rod, wherein the mesh cementite of the wire rod is 0.5 grade, the sorbitizing rate is 99 percent, the pro-eutectoid ferrite is 0.1 percent, and the strength fluctuation range is 13 MPa; the surface defect depth of the wire rod is 0.03mm, and the defect ratio is 0.3%.
A production method of an easy-to-pull cord steel LX82A wire rod. The method comprises KR desulfurization of molten iron, steelmaking in a converter, LF refining, continuous casting of a bloom, cogging, coping and rolling. The method comprises the following specific steps:
molten iron KR desulfurization process:
molten iron before desulfurization: the temperature is 1365 ℃, the S content is 0.035%, and the Ti content is 0.06%; molten iron after desulfurization: the temperature was 1311 ℃, the S content was 0.003%, and the Ti content was 0.07%.
A converter smelting process:
the molten iron ratio is 91%; 0.015 percent of S content, 0.01 percent of Ti content and 0.020 percent of Al content in the scrap steel; the alkalinity of the converter final slag is 3.8, the tapping temperature is 1648 ℃, the end point carbon content is 0.11 percent, and alloy material and slag material are added when 1/3 steel is tapped.
An LF refining procedure:
the alkalinity of LF refining slag is 1.05, the brown slag time is 32min, the soft stirring time is 28min, and the molten steel is strictly prohibited from being exposed.
And a bloom continuous casting process:
adopting a long water gap, argon sealing, a tundish covering agent and an immersion water gap for protective casting; the superheat degree of the molten steel is 25 ℃; the electromagnetic stirring current of the crystallizer is 750A, and the frequency is 1.5 Hz; the height of the liquid level of the steel is 81 percent; the pulling speed is 0.64 m/min; the secondary cooling specific water amount is 0.24L/Kg; the reduction by weight was 7.8% (reduction ═ reduction size/strand height).
The coping process comprises the following steps:
and the casting blank is mechanically and fully ground twice, wherein the first time adopts a 16-mesh grinding wheel for grinding, and the second time adopts a 24-mesh grinding wheel for grinding.
High-speed wire rolling procedure:
the inlet temperature of finish rolling is 1010 ℃, the spinning temperature is 910 ℃, and a three-stage stelmor cooling system is adopted: cooling with 100% air flow between the spinning temperature and 600 ℃, cooling with 40% air flow between 600 ℃ and 500 ℃, and closing the fan and the heat-preservation cover below 500 ℃.
Example 3
The embodiment provides an easy-to-draw cord steel LX86A wire rod, wherein the mesh cementite of the wire rod is 1.0 grade, the sorbitizing rate is 99 percent, the pro-eutectoid ferrite is 0.1 percent, and the strength fluctuation range is 15 MPa; the surface defect depth of the wire rod is 0.02mm, and the defect ratio is 0.4%. The rough drawing speed is 8m/s, the middle drawing speed is 18m/s, the wet drawing speed is 18m/s, and the yarn breakage rate is 1 time/100 t.
A production method of an easy-to-pull cord steel LX86A wire rod. The method comprises KR desulfurization of molten iron, steelmaking in a converter, LF refining, continuous casting of a bloom, cogging, coping and rolling. The method comprises the following specific steps:
molten iron KR desulfurization process:
molten iron before desulfurization: the temperature is 1360 ℃, the S content is 0.04 percent, and the Ti content is 0.07 percent; molten iron after desulfurization: the temperature is 1308 ℃, the S content is 0.004 percent, and the Ti content is 0.06 percent.
A converter smelting process:
the molten iron ratio is 93 percent; the content of S in the scrap steel is 0.020%, the content of Ti is 0.008% and the content of Al is 0.028%; the alkalinity of the converter final slag is 4.0, the tapping temperature is 1642 ℃, the end point carbon content is 0.10 percent, and alloy material and slag material are added when 1/3 steel is tapped.
An LF refining procedure:
the alkalinity of LF refining slag is 1.03, the brown slag time is 31min, the soft stirring time is 21min, and the molten steel is strictly prohibited from being exposed.
And a bloom continuous casting process:
adopting a long water gap, argon sealing, a tundish covering agent and an immersion water gap for protective casting; the superheat degree of the molten steel is 25 ℃; the electromagnetic stirring current of the crystallizer is 750A, and the frequency is 1.5 Hz; the height of the liquid level of the steel is 81 percent; the pulling speed is 0.60 m/min; the secondary cooling water ratio is 0.23L/Kg; the reduction by weight was 7.5% (reduction ═ reduction size/strand height).
The coping process comprises the following steps:
and the casting blank is mechanically and fully ground twice, wherein the first time adopts a 16-mesh grinding wheel for grinding, and the second time adopts a 24-mesh grinding wheel for grinding.
High-speed wire rolling procedure:
the inlet temperature of finish rolling is 1000 ℃, the spinning temperature is 920 ℃, and a three-stage stelmor cooling system is adopted: cooling with 100% air flow between the spinning temperature and 600 ℃, cooling with 30% air flow between 600 ℃ and 500 ℃, and closing the fan and the heat-preservation cover below 500 ℃.
LX86A wire rod net cementite is 1.0 grade, the sorbite rate is 99 percent, the proeutectoid ferrite is 0.1 percent, and the intensity fluctuation range is 15 MPa; the surface defect depth of the wire rod is 0.02mm, and the defect ratio is 0.4%.
To better illustrate the easy-pull performance of the steel wire rod for the cord in the embodiment of the present invention, LX72A, LX82A and LX86A materials were purchased in the market as comparative examples and pulled under the same production conditions, and the results are shown in table 1 below. As can be seen from Table 1, the cord steel wire rod produced by the production method provided by the invention has excellent drawing performance, the drawing speed is obviously improved, and meanwhile, the wire breakage rate can be ensured to be at a lower level.
TABLE 1
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (6)
1. An easy-to-draw cord steel wire rod has a rough drawing speed of 8-10m/s, a medium drawing speed of 18-22m/s, a wet drawing speed of 18-20m/s and a wire breakage rate of less than or equal to 1 time/100 t.
2. An easy-to-draw cord steel wire rod according to claim 1, wherein the mesh cementite of the wire rod is less than or equal to 1.0 grade, the sorbitizing rate is greater than or equal to 95 percent, the pro-eutectoid ferrite is less than 0.5 percent, and the strength fluctuation range is less than or equal to 15 MPa.
3. An easy-to-draw cord steel wire rod according to claim 1, wherein the surface defect depth of the wire rod is less than or equal to 0.05mm, and the defect ratio (defect length/wire rod length) is less than or equal to 0.8%.
4. A method of producing a pull-off cord steel wire rod of any one of claims 1 to 3 comprising: KR desulfurization of molten iron, smelting in a converter, LF refining, continuous casting of a bloom, cogging, coping and high-speed wire rolling;
molten iron KR desulfurization process:
before desulfurization, molten iron requires: the temperature is more than or equal to 1350 ℃, S is less than or equal to 0.045%, and Ti is less than or equal to 0.08%; after desulfurization, the molten iron requires: the temperature is more than or equal to 1300 ℃, the S is less than or equal to 0.005 percent, and the Ti is less than or equal to 0.09 percent;
a converter smelting process:
the molten iron ratio is more than or equal to 90 percent; the alkalinity of the converter final slag is 3.5-4.5, the tapping temperature is 1640-1660 ℃, and the end point carbon content is 0.08-0.30%;
an LF refining procedure:
the alkalinity of LF refining slag is 1.0-1.04, the brown slag time is 25-35min, and the soft stirring time is 20-30 min;
and a bloom continuous casting process:
the superheat degree of the molten steel is 18-28 ℃; the height of the liquid level of the steel is 80-85%; the pulling speed is 0.60-0.64 m/min; the specific water amount of the secondary cooling is 0.23-0.24L/Kg; the reduction under the heavy pressure is more than or equal to 7.5 percent;
the coping process comprises the following steps:
the casting blank is mechanically polished for at least two times;
high-speed wire rolling procedure:
the spinning temperature is 890-920 ℃, and a three-stage stelmor cooling system is adopted: cooling with 100% air flow between spinning temperature and 600 deg.C, cooling with 30-50% air flow between 600 deg.C and 500 deg.C, and closing the blower and the heat-insulating cover below 500 deg.C.
5. The method for producing an easily drawn cord steel wire rod according to claim 4, wherein: the steel scrap requirements are as follows: less than or equal to 0.020 percent of S, less than or equal to 0.01 percent of Ti and less than or equal to 0.030 percent of Al.
6. The method for producing an easily drawn cord steel wire rod according to claim 4, wherein: the casting blank is mechanically ground completely, a 16-mesh grinding wheel is used for grinding for the first time, and a 24-mesh grinding wheel is used for grinding for the second time.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501498A (en) * | 2020-10-20 | 2021-03-16 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for 2300MPa prestressed steel strand and production method thereof |
| CN112620385A (en) * | 2020-11-25 | 2021-04-09 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade more than 90, cord steel and production method thereof |
| CN113770652A (en) * | 2021-09-13 | 2021-12-10 | 泰州市新龙翔金属制品有限公司 | Processing technology of energy-saving disc steel |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213448A (en) * | 1989-02-15 | 1990-08-24 | Kawasaki Steel Corp | High-carbon steel wire rod combining adhesive strength of secondary scale after hot rolling with mechanical descaling property before wiredrawing |
| CN102352469A (en) * | 2011-11-03 | 2012-02-15 | 江苏省沙钢钢铁研究院有限公司 | Ultrahigh-strength vanadium-titanium composite microalloyed high-carbon steel wire rod and preparation method thereof |
| CN102409228A (en) * | 2010-09-20 | 2012-04-11 | 鞍钢股份有限公司 | High-strength high-carbon steel wire rod and production method thereof |
| CN102534094A (en) * | 2012-01-01 | 2012-07-04 | 首钢总公司 | Method for producing tire cord steel wire by converter billet continuous casting process |
| CN103817148A (en) * | 2013-12-19 | 2014-05-28 | 江苏省沙钢钢铁研究院有限公司 | Control method for reducing wire rod net-shaped cementite for cord thread |
| CN107442596A (en) * | 2017-07-11 | 2017-12-08 | 李文军 | A kind of improved steel cord production method |
-
2019
- 2019-10-29 CN CN201911034550.4A patent/CN110747386B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213448A (en) * | 1989-02-15 | 1990-08-24 | Kawasaki Steel Corp | High-carbon steel wire rod combining adhesive strength of secondary scale after hot rolling with mechanical descaling property before wiredrawing |
| CN102409228A (en) * | 2010-09-20 | 2012-04-11 | 鞍钢股份有限公司 | High-strength high-carbon steel wire rod and production method thereof |
| CN102352469A (en) * | 2011-11-03 | 2012-02-15 | 江苏省沙钢钢铁研究院有限公司 | Ultrahigh-strength vanadium-titanium composite microalloyed high-carbon steel wire rod and preparation method thereof |
| CN102534094A (en) * | 2012-01-01 | 2012-07-04 | 首钢总公司 | Method for producing tire cord steel wire by converter billet continuous casting process |
| CN103817148A (en) * | 2013-12-19 | 2014-05-28 | 江苏省沙钢钢铁研究院有限公司 | Control method for reducing wire rod net-shaped cementite for cord thread |
| CN107442596A (en) * | 2017-07-11 | 2017-12-08 | 李文军 | A kind of improved steel cord production method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501498A (en) * | 2020-10-20 | 2021-03-16 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for 2300MPa prestressed steel strand and production method thereof |
| CN112620385A (en) * | 2020-11-25 | 2021-04-09 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade more than 90, cord steel and production method thereof |
| CN112620385B (en) * | 2020-11-25 | 2022-07-22 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade of more than 90, cord steel and production method thereof |
| CN113770652A (en) * | 2021-09-13 | 2021-12-10 | 泰州市新龙翔金属制品有限公司 | Processing technology of energy-saving disc steel |
| CN113770652B (en) * | 2021-09-13 | 2024-04-02 | 泰州市新龙翔金属制品有限公司 | Energy-saving disc round steel processing technology |
| 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 |
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