CN103397156A - Wire manufacturing method - Google Patents
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- CN103397156A CN103397156A CN2013103162893A CN201310316289A CN103397156A CN 103397156 A CN103397156 A CN 103397156A CN 2013103162893 A CN2013103162893 A CN 2013103162893A CN 201310316289 A CN201310316289 A CN 201310316289A CN 103397156 A CN103397156 A CN 103397156A
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a wire manufacturing method, which comprises the procedures of electric furnace smelting, external refining, continuous casting of billets, high wire controlled rolling and controlled cooling sequentially. The method is characterized in that (1) the loading quantity of molten iron in an electric furnace is more than or equal to 60 weight percent, and the balance is wire or plate cut waste steel; (2) sulfur is removed; (3) the tapping temperature is 1,605 to 1,635 DEG C, ferrosilicon is used for deoxidization during tapping, and alloying is implemented in the tapping process; (4) refining is adopted; (5) superheat of 10 to 30 DEG C is adopted in continuous casting, the casting speed is 2.0 to 2.5 meters per minute, the water distribution quantities of the first three sections of a secondary cooling zone are 60-80 L/min, 100-120 L/min and 40-60 L/min respectively, and the section size of each ingot is 140mm*140mm to 160mm*160mm; and (6) cooling is controlled on a Stelmor wire after rolling.
Description
Technical field
The present invention be more particularly directed to a kind of wire rod and manufacture method thereof, belong to ferrous metallurgy and steel rolling field.
Background technology
Rubber skeleton class wire rod is the highest kind of specification of quality in the high-carbon wire fabrication, and its complete processing is numerous and diverse.Take the steel cord as example, traditional production technique is as follows: Φ 5.5mm wire rod → first is drawn to Φ 3.0～3.5mm → 980～1050 ℃ austenitizing → 570～590 ℃ of sorbitizing → seconds and is drawn to Φ 0.8～1.6mm → 980～1050 ℃ austenitizing → ℃ diffusion annealing →Di tri-roads, 570～590 ℃ of sorbitizing → plating → 480 and is drawn to Φ 0.15～0.38mm → plying, draft can reach 99.9%, and elongation can reach more than 1300 times.While with the vertical pulling material, producing the steel cord, Φ 5.5mm wire rod direct drawing, to Φ 0.9～2.0mm, then through a thermal treatment, is eliminated work hardening, recovers the plasticity of wire rod, then carries out the 2nd passes of drawing to Φ 0.15～0.38mm, just can pool capital.During having omitted, the vertical pulling material draws thermal treatment, letter economizes operation, has reduced the consumption of manpower, machinery, equipment etc., has saved production cost, energy-conserving and environment-protective more are an important development trend of the rubber skeleton class materials processing technologies such as steel cord, steel bead wire, rubber tube wire.
Because vertical pulling material single pass drawing deformation amount is larger than common wire, higher to the wire rod requirement, take 72 rank vertical pulling materials as example, wire rod intensity should not surpass 960Mpa, and reduction of area should not be lower than 30%.If intensity greater than 960MPa, adds the work hardening that causes after drawing, the intensity of wire rod and hardness are increased, increase mould loss and production cost.Plasticity and the homogeneity of structure of reduction of area reflection wire rod, plasticity is too poor, easily causes the drawing fracture of wire.The mechanical property such as intensity and reduction of area is by organization decided.In actual production process, process for cooling determines tissue and the performance of product.Strong cold technique is adopted in the production of tradition carbon steel wire rod with high, and the tensile strength of common 72 rank wire products, up to 1050～1100MPa, can't adopt vertical pulling explained hereafter high carbon steel filament; And unrelieved stress is larger, before production, needs the timeliness of the growing phase; In addition, the strong cold center segregation place that easily causes forms martensite, causes the drawing fracture of wire.
Summary of the invention
The object of the invention is to for not enough a kind of high carbon steel filament vertical pulling wire rod and the manufacture method thereof of proposing of the prior art, adopt this vertical pulling wire-rod roll processing rubber skeleton class material, in can omitting, draw thermal treatment, play save energy, reduce the effect of polluting, reducing use cost.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of high carbon steel filament is with the manufacture method of vertical pulling wire rod, comprises that electrosmelting, external refining, continuous small-billet casting, the high line traffic control of carrying out successively roll and stelmor line traffic control cooling working procedure, in these operations:
(1) electric furnace molten iron Intake Quantity >=60wt%, all the other cut steel scrap for wire rod or sheet material;
(2) molten iron adopts the desulfurization of magnesium powder, Ti≤0.05wt% after desulfurization, and S≤0.003wt%, temperature is higher than 1300 ℃, and the rate of skimming of desulfurized molten iron bag is greater than 95wt%;
(3) tapping temperature is 1605～1635 ℃, during tapping, uses the ferrosilicon deoxidation, and tapping process carries out alloying;
(4) refining time >=35 minute, synthetic slag is adopted in refining, controls basicity 0.90～1.10, hold-time >=25 minute in this basicity scope; Soft churning time >=18 minute, pressure occurs that with the top of the slag fine motion is as the criterion;
(5) continuous casting adopts 10～30 ℃ of superheating temperature, and casting speed is 2.0～2.5m/min, and two cold-zone first three section water distribution quantities are respectively 60～80L/min, 100～120L/min, 40～60L/min, and casting blank cross-section size is 140mm * 140mm～160mm * 160mm;
(6) after rolling, on stelmo line, control cooling, 820～860 ℃ of laying temperatures, roller table speed 1.0～1.4m/s, and open number one, No. second, No. seven blower fan fully, fan delivery, greater than 15.7 ten thousand m3/h, makes speed of cooling be controlled at 10～21 ℃/s.
Further, in stelmor line traffic control cooling working procedure, speed of cooling before phase transformation>17 ℃/s, during phase transformation, temperature is controlled at 600～680 ℃, and coil overlapped points and other position temperature difference≤50 ℃.
Below illustrate:
In electrosmelting, external refining and continuous small-billet casting operation:
(1) electric furnace molten iron Intake Quantity >=60wt%, all the other are the high-quality steel scrap.The molten iron ratio of packing into is high, selects the high-quality steel scrap, from source, has controlled impurity element S, P, Cu, Ni equal size; Simultaneously, molten iron content is high, and steel scrap content is few, can reduce electrode and use, and reduces the finished product nitrogen content.
(2) molten iron adopts the desulfurization of magnesium powder, Ti≤0.05wt% after desulfurization, and S≤0.003wt%, temperature is higher than 1300 ℃, and the rate of skimming of desulfurized molten iron bag is greater than 95wt%.Desulfurizing iron, guaranteed that final finished S content is lower than 0.01wt%; After desulfurization, skim, prevent that effectively in slag, S gets back in steel, guarantee sweetening effectiveness.
(3) electrosmelting, 1605～1635 ℃ of tapping temperatures, the lower slag of avoiding tapping, use the ferrosilicon deoxidation during tapping, and tapping process carries out alloying, and the alloy addition sequence is ferrosilicon → low carbon ferromanganese → special-purpose synthetic slag → lime → low nitrogen carburelant.Use the ferrosilicon deoxidation can effectively reduce Al2O3 content, prevented that the indeformable inclusion of magnesium-aluminium spinel class from producing; Reinforced diffusive deoxidation and the alloy homogenizing of being beneficial to of tapping process.
(4) refining time >=35 minute, synthetic slag is adopted in refining, controls basicity 0.90～1.10, hold-time >=25 minute in this basicity scope; Soft churning time >=18 minute, pressure occurs that with the top of the slag fine motion is as the criterion, and does not allow the molten steel face exposed.Synthetic slag is that CaO and SiO2 arrange in pairs or groups according to the certain mass ratio, adds synthetic slag and can stablize control basicity; In 0.9～1.1 scope basicity, kept 25 minutes, guarantee that inclusion content in melting steel fully floats and fully plastification; Long soft churning time, guarantee that Large Inclusions fully floats in slag, improves the cleanliness factor of molten steel.
(5) continuous casting adopts 10～30 ℃ of superheating temperature, and casting speed is 2.0～2.5m/min, and the crystallizer water distribution quantity is 1800L/min, and two cold-zone first three section water distribution quantities are respectively 60～80L/min, 100～120L/min, 40～60L/min; Casting blank section is 140mm * 140mm～160mm * 160mm; For carbon content, be the high carbon steel of 0.69～0.73wt%, while adopting continuous small-billet casting, low overheat helps to reduce center segregation, and slow pulling rate is mixed weak cold, can reduce strand column crystal content, helps to alleviate center segregation.
High line traffic control roll and stelmor line traffic control cooling working procedure in:
(6) start rolling temperature is 950～1020 ℃, and laying temperature is 820～860 ℃;
(7) after rolling, on stelmo line, control coolingly, stelmor control cold line has 12 sections, comprises entrance and outlet section, and middle the 1st section to the 10th section; Wherein is furnished with blower fan for the 1st section to 6 sections, 2 every section; Length at entry is 3.5m, all the other every section 9 meters;
(8) stelmor control cold line upper inlet speed is 1.0m/s, and eight sections raceway speed of first paragraph to the are 1.1～1.4m/s, three sections speedups of first paragraph to the, and speed ratio is the 0～20%, four section to the 8th section deceleration, speed ratio is-3～-15%;
(9) open 3 Fans, all the other blower fans cut out, the 1st section to the 4th section has eight Fans altogether, and fan delivery is followed successively by: 100%, 100%, 0%, 0%, 0%, 0%, 100%, 0%, and wherein 100% expression air force is 150000～160000m3/h; 0% expression blower fan is not opened, and air quantity is 0;
(10) according to above parameter setting, guarantee that the front speed of cooling of phase transformation is greater than 17 ℃/s, cold soon before phase transformation, suppress cementite network and separate out along austenite grain boundary; The phase transition process blower fan cuts out, and guarantees that phase transformation carries out at 600～680 ℃, prevents that the too low tissue lamellar spacing that causes of transformation temperature is meticulous or generate bainite, and this all can make work hardening rate strengthen, and is unfavorable for the drawing of aximal deformation value; The roller table speed in phase transformation stage is 1.1～1.4m/s, raceway speed faster, by the wire rod spacing draw larger, reduced the temperature difference at overlapped points place and middle place, the temperature difference is controlled at 50 ℃ of left and right, makes horizontal cooling more even.
According to the high carbon steel filament vertical pulling material that manufacture method of the present invention is produced, in microstructure, the about 80v/v% of sorbite percentage, do not contain ferrite network and cementite network, and the tensile strength of original wire rod is between 900～960Mpa, and reduction of area is between 35～44%.The undulating quantity of wire rod performance is less, and strength fluctuation is less than 30Mpa, and the reduction of area undulating quantity is about 4%, and the structure property of wire rod is more even.In addition, Control and Inclusion Removal is all right, does not have the above indeformable inclusion of 20 μ m and the above TiN of 2 μ m to be mingled with.
Embodiment
Below in conjunction with some preferred embodiments, technical scheme of the present invention is further described.
Embodiment 1 this high carbon steel filament comprises steel-making continuous casting and steel rolling process with the manufacture method of vertical pulling wire rod, the product original disc bar size Φ 5.5mm that obtains, production process is specially: and electrosmelting → external refining → continuous casting 140 square billets → high line traffic control rolls → and the stelmor line traffic control is cold, key control parameter is: (1) 82 ton of molten iron+32 ton high-quality steel scrap, 1350 ℃ of molten iron temperatures, molten iron is after the desulfurization of spray magnesium powder, and S content is 0.0020wt%, and sweetening process is skimmed 5 times; (2) tapping temperature is 1630 ℃, during tapping, uses the ferrosilicon deoxidation, then adds successively the special-purpose synthetic slag of 310kg ferrosilicon → 550kg low carbon ferromanganese → 1000kg → 200kg lime → low nitrogen carburelant; (3) refining time is 45 minutes, refining slag basicity R=1.05, soft churning time 20 minutes; (4) the continuous casting superheating temperature is 23 ℃, and 140mm * 140mm square billet casting speed is 2.30m/min, and two cold-zone first three section water distribution quantities are respectively 60L/min, 100L/min, 50L/min; (5) start rolling temperature is 1000 ℃, 830 ℃ of laying temperatures, and first, second, third and fourth section raceway speed is respectively 1.10m/s, 1.20m/s, 1.30m/s, 1.40m/s, First to the eight Fans air quantity are respectively: 100%, 100%, 0%, 0%, 0%, 0%, 100%, 0%.Wire rod comprehensive test result is as shown in table 1, uses this wire rod, from Φ 5.5mm direct drawing to 1.8mm, then passes through a time thermal treatment, then pulls to Φ 0.22mm, has omitted the intermediate heat treatment operation.
Embodiment 2 these high carbon steel filaments comprise steel-making continuous casting and steel rolling process with the manufacture method of vertical pulling wire rod, the product original disc bar that obtains is of a size of Φ 5.5mm, its production process is specially: and electrosmelting → external refining → continuous casting 140 square billets → high line traffic control rolls → and the stelmor line traffic control is cold, key control parameter is: (1) 81 ton of molten iron+30 ton Wide and Thick Slab steel scrap, 1380 ℃ of molten iron temperatures, molten iron is after the desulfurization of spray magnesium powder, and S content is 0.0028wt%, and sweetening process is skimmed 5 times; (2) tapping temperature is 1625 ℃, during tapping, uses the ferrosilicon deoxidation, then adds successively the special-purpose synthetic slag of 300kg ferrosilicon → 540kg low carbon ferromanganese → 1000kg → 200kg lime → low nitrogen carburelant; (3) refining time is 43 minutes, refining slag basicity R=0.98, soft churning time 21 minutes; (4) the continuous casting superheating temperature is 20 ℃, and 140mm * 140mm square billet casting speed is 2.40 meters/min, and two cold-zone first three section water distribution quantities are respectively 50L/min, 110L/min, 55L/min; (5) start rolling temperature is 1010 ℃, 840 ℃ of laying temperatures, first, second, third and fourth section raceway speed is respectively 1.1m/s, 1.21m/s, 1.33m/s, 1.26m/s, and straight the 8th Fans air quantity of First is respectively: 100%, 100%, 0%, 0%, 0%, 0%, 100%, 0%.Wire rod comprehensive test result is as shown in table 1, uses this wire rod, from Φ 5.5mm direct drawing to Φ 1.83mm, then passes through a time thermal treatment, then pulls to 0.30mm, has omitted the intermediate heat treatment operation.
Embodiment 3 these high carbon steel filaments comprise steel-making continuous casting and steel rolling process with the manufacture method of vertical pulling wire rod.The product original disc coil diameter that obtains is 5.5mm, its production process is specially: and electrosmelting → external refining → continuous casting 140 square billets → high line traffic control rolls → and the stelmor line traffic control is cold, key control parameter is: (1) 83 ton of molten iron+30 ton Wide and Thick Slab steel scrap, 1356 ℃ of molten iron temperatures, molten iron is after the desulfurization of spray magnesium powder, S content is 0.0023wt%, and sweetening process is skimmed 5 times; (2) tapping temperature is 1620 ℃, during tapping, uses the ferrosilicon deoxidation, then adds successively the special-purpose synthetic slag of 305kg ferrosilicon → 550kg low carbon ferromanganese → 1000kg → 200kg lime → low nitrogen carburelant; (3) refining time is 38 minutes, refining slag basicity R=1.10, soft churning time 24 minutes; (4) the continuous casting superheating temperature is 23 ℃, and 160mm * 160mm square billet casting speed is 2.45 meters/min, and two cold-zone first three section water distribution quantities are respectively 60L/min, 120L/min, 55L/min; (5) start rolling temperature is 990 ℃, 820 ℃ of laying temperatures, first, second, third and fourth section raceway speed is respectively 1.15m/s, 1.32m/s, 1.32m/s, 1.27m/s, and straight the 8th Fans air quantity of First is respectively: 100%, 100%, 0%, 0%, 0%, 0%, 100%, 0%.Wire rod comprehensive test result is as shown in table 1, uses this wire rod, from Φ 5.5mm direct drawing to Φ 1.78mm, then passes through a time thermal treatment, then pulls to Φ 0.32mm, has omitted the intermediate heat treatment operation.
Table 1 has been listed the detection analysis report of Φ 5.5 gren rod mechanical properties, inclusion in embodiment 1-3.Wherein the inclusion detection is the sample of getting this stone or metal plate for standing a stove on as a precaution against fire bar different positions, has 12 vertical sections altogether, and area of detection is 462mm2, has added up indeformable inclusion and TiN and has been mingled with overall dimension.The definition long-width ratio less than 3 inclusion be indeformable being mingled with.Provided the statistic data of gren rod center, 1/4 place, edge's sorbitic rate, sorbitic rate is all more than 80%.Also measure simultaneously Mechanical Fluctuation, and measure tensile strength and the reduction of area value of different positions, in a large amount of take off data, get the undulating quantity that minimum and maximum value difference value is mechanical property.The undulating quantity of the maximum of tensile strength and reduction of area is respectively 35Mpa, 3.9%.Undulating quantity is less, shows that mechanical property is more even.
Inclusion and mechanical performance data table in table 1 embodiment 1-3 wire rod
Claims (8)
1. method for manufacturing wire, comprise that electrosmelting, external refining, continuous small-billet casting, the high line traffic control of carrying out successively roll and control cooling working procedure, it is characterized in that: (1) electric furnace molten iron Intake Quantity >=60wt%, and all the other cut steel scrap for wire rod or sheet material; (2) desulfurization; (3) tapping temperature is 1605～1635 ℃, during tapping, uses the ferrosilicon deoxidation, and tapping process carries out alloying; (4) refining; (5) continuous casting adopts 10～30 ℃ of superheating temperature, and casting speed is 2.0～2.5m/min, and two cold-zone first three section water distribution quantities are respectively 60～80L/min, 100～120L/min, 40～60L/min, and casting blank cross-section size is 140mm * 140mm～160mm * 160mm; (6) after rolling, on stelmo line, control cooling.
2. method according to claim 1, is characterized in that, in the control cooling working procedure, and speed of cooling before phase transformation>17 ℃/s, during phase transformation, temperature is controlled at 600～680 ℃, and coil overlapped points and other position temperature difference≤50 ℃.
3. method according to claim 1, wherein, adopt the magnesium powder to carry out desulfurization to molten iron.
4. method according to claim 3, wherein, Ti≤0.05wt% after desulfurization, S≤0.003wt%, temperature is higher than 1300 ℃, and the rate of skimming of desulfurized molten iron bag is greater than 95wt%.
5. method according to claim 1, wherein, the time of described refining is not less than 35 minutes, and synthetic slag is adopted in refining, controls basicity 0.90～1.10, and the hold-time is not less than 25 minutes in this basicity scope.
6. method according to claim 1, wherein, the soft churning time of described refining is not less than 18 minutes, and pressure occurs that with the top of the slag fine motion is as the criterion.
7. method according to claim 1, wherein, 820～860 ℃ of described cooling laying temperatures, roller table speed 1.0～1.4m/s, speed of cooling is controlled at 10～21 ℃/s.
8. wire rod that adopts method as claimed in claim 1 to prepare, it is characterized in that, the original wire rod carbon content of described wire rod is 0.69-0.73wt%, diameter is 5.5mm, tensile strength is 900～960Mpa, reduction of area is 35～44%, and indeformable inclusion size is less than 15 μ m, and the diameter of original wire rod after direct drawing of this vertical pulling wire rod is at 0.9～2.0mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959556A (en) * | 2015-06-17 | 2015-10-07 | 柳州金特新型耐磨材料股份有限公司 | Continuous steel casting production method |
| CN105132610A (en) * | 2015-08-26 | 2015-12-09 | 武汉钢铁(集团)公司 | Production method capable of controlling titanium inclusions of thin-size high-end tire cord steel |
| CN106191650A (en) * | 2016-08-04 | 2016-12-07 | 邢台钢铁有限责任公司 | High abrasion Surface hardened layer type gren rod and production method thereof |
| 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 |
| CN114054500A (en) * | 2021-11-11 | 2022-02-18 | 南通开发区升阳金属制品有限公司 | Preparation method of high-carbon steel high-strength filament |
| CN114054500B (en) * | 2021-11-11 | 2024-04-23 | 南通开发区升阳金属制品有限公司 | Preparation method of high-carbon steel high-strength filament |
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| CN101462155A (en) * | 2007-12-21 | 2009-06-24 | 首钢总公司 | Method for producing ultra-low carbon wire by small square billet continuous casting |
| CN102492814A (en) * | 2011-12-15 | 2012-06-13 | 江苏省沙钢钢铁研究院有限公司 | Straight pull wire for high-carbon steel fine wires and manufacturing method for straight pull wire |
| 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 |
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| CN101462155A (en) * | 2007-12-21 | 2009-06-24 | 首钢总公司 | Method for producing ultra-low carbon wire by small square billet continuous casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959556A (en) * | 2015-06-17 | 2015-10-07 | 柳州金特新型耐磨材料股份有限公司 | Continuous steel casting production method |
| CN105132610A (en) * | 2015-08-26 | 2015-12-09 | 武汉钢铁(集团)公司 | Production method capable of controlling titanium inclusions of thin-size high-end tire cord steel |
| CN106191650A (en) * | 2016-08-04 | 2016-12-07 | 邢台钢铁有限责任公司 | High abrasion Surface hardened layer type gren rod and production method thereof |
| 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 |
| CN114054500A (en) * | 2021-11-11 | 2022-02-18 | 南通开发区升阳金属制品有限公司 | Preparation method of high-carbon steel high-strength filament |
| CN114054500B (en) * | 2021-11-11 | 2024-04-23 | 南通开发区升阳金属制品有限公司 | Preparation method of high-carbon steel high-strength filament |
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Application publication date: 20131120 |