CN103938071A - Wire for stranded galvanized steel wire and production method of wire - Google Patents
Wire for stranded galvanized steel wire and production method of wire Download PDFInfo
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- CN103938071A CN103938071A CN201410182919.7A CN201410182919A CN103938071A CN 103938071 A CN103938071 A CN 103938071A CN 201410182919 A CN201410182919 A CN 201410182919A CN 103938071 A CN103938071 A CN 103938071A
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Abstract
The invention discloses a wire for a stranded galvanized steel wire. The wire comprises the following components in percentage by weight: 0.80%-0.90% of C, 0.60%-0.90% of Mn, 0.15%-0.35% of Si, less than or equal to 0.40% of Cr, less than or equal to 0.025% of P, less than or equal to 0.015% of S, less than or equal to 0.0070% of N and the balance of Fe and inevitable impurities. The invention also discloses a production method of the wire for the stranded galvanized steel wire. According to the production method, the tapping carbon content is less than or equal to 0.10%; the superheating temperature of continuous casting tundish molten steel is 25-35 DEG C, the pulling rate is 1.10-1.50 m/min, and the total reduction of electromagnetic stirring is 10-15 mm; the steel billet tapping temperature of a high-speed wire heating furnace is 1050-1110 DEG C; the speed of an inlet roller way of a Stelmor fan is 0.70-0.91 m/s. The wire disclosed by the invention has the advantages of high steel purity degree, uniformity in component and good drawing performance and can be widely suitable for a UHV (Ultra High Voltage) transmission line.
Description
Technical field
The present invention relates to steel products and produce, particularly relate to a kind of Stranded Galvanized Steel Wire wire rod and production method thereof.
Background technology
Along with applying of China's extra-high voltage and large leap overhead line, as the framework material of transmitting line, 1 × 7 and 1 × 19 structure Stranded Galvanized Steel Wire of tradition intensity (1% elongation stress is lower than 1200MPa) has been difficult to meet the requirement of feeder cable, upgrading galvanized steel wire, steel strand strength grade (1% elongation stress is greater than 1410MPa) adopt 1 × 37 structure Stranded Galvanized Steel Wire to become trend from now on simultaneously.
Due to current domestic extra-high voltage and the large every annual requirement of High Strength Steel twisted wire lower (approximately 10,000 tons) of crossing over, do not meet and manufacture the special wire rod raw material supply requiring, also there is no the production standard of wire rod, metal product plant can only be chosen material and produce from high-carbon steel wire rod SWRH82B.
Look into and publish in document, have about the report of producing prestress wire by high carbon steel, but these steel strand that adopt prior art to produce, cannot meet the requirement of wire fabrication industry to product innovation, the purity of wire rod steel is not high, composition and tissue distribution inequality, poker characteristic is poor.
Simultaneously, both at home and abroad manufacturer utilizes existing carbon steel wire rod with high in the time of production department's point specification extra-high voltage Stranded Galvanized Steel Wire, due to the fluctuation (with the poor > 60MPa of circle) of wire rod poker characteristic, cause 1% elongation stress of galvanized steel wire finished product and the ratio of tensile strength not to reach more than 0.80, and torsion, winding performance can not meet the requirement of high-strength galvanized steel wire, steel strand completely, cannot volume shipment, need to develop new production method for the special wire rod of Stranded Galvanized Steel Wire.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of Stranded Galvanized Steel Wire wire rod and production method thereof are provided, can meet the technical requirements of wire fabrication industry to product innovation, there is high purity, composition and homogeneous microstructure and the good feature of poker characteristic of wire rod steel.
A kind of Stranded Galvanized Steel Wire wire rod provided by the invention, in described wire rod, the weight percent of each component is: C:0.80～0.90%, Mn:0.60～0.90%, Si:0.15～0.35%, Cr≤0.40%, P≤0.025%, S≤0.015%, N≤0.0070%, all the other are Fe and inevitable impurity.Because the purity of steel mainly comprises the non-metallic inclusions such as H, O, N gas and P, S in steel, so reduce P, S, N content by control P, S, N, just can improve the purity of steel, in addition, P, S owing to causing the principal element of continuously cast bloom center segregation, so reduce P, S content, just can reduce the component segregation of steel billet.
In technique scheme, in described wire rod, the weight percent of each component is: C:0.83%, Mn:0.75%, Si:0.25%, Cr:0.32%, P:0.018%, S:0.008%, N:0.0056%, all the other are Fe and inevitable impurity.
The production method of wire rod for a kind of Stranded Galvanized Steel Wire provided by the invention, comprise the following steps: blast-melted → desulfurizing iron → converter smelting → Argon → LF (Ladle Refining Furnace, ladle refining furnace) refining → VD (Vacuum Degassing, vacuum outgas) degassed → continuous casting steel machine → strand cleaning → square billet heating → high speed wire rolling → stelmor control is cold → collection volume → P/F (proceed/free, transport drives, moves about) line → bundling, wherein, carbon content≤0.10% of tapping in converter smelting step; In continuous casting steel machine step, in continuous casting, wrapping molten steel overheat is 25～35 DEG C, and pulling rate is 1.10～1.50m/min, and crystallizer adopts induction stirring, and continuous casting adopts and gently depresses, and total reduction is 10～15mm; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1050～1110 DEG C, and rolling specs is φ 5.5～12.5mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.70～0.91m/s.
In technique scheme, the carbon content of tapping in converter smelting step is 0.070%; In continuous casting steel machine step, in continuous casting, wrapping molten steel overheat is 28 DEG C, and pulling rate is 1.30m/min, and stirring parameter comprises the operating frequency of stir current and the 3.0Hz of 330A, and continuous casting total reduction is 11.5mm; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1080 DEG C, and rolling specs is φ 6.5mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.83m/s.
Adopt the refinery practices such as LF refining, VD be degassed can adjust and the even chemical composition in steel, reduce and be mingled with and gas content; By improving steel billet tapping temperature, high line process furnace can make steel billet chemical composition more even, the roller table speed that improves stelmor blower fan can ensure the improvement of poker characteristic, ensures during phase transformation fully to change and reduce the fan delivery of wire rod phase transformation middle and later periods, avoids the martensitic generation in center.
In technique scheme, described Argon step adopts bottom argon blowing technology.Adopt BOTTOM ARGON BLOWING can further adjust and the even chemical composition in steel, reduce and be mingled with and gas content to greatest extent.
In technique scheme, in described continuous casting steel machine step, Cross Section of CC Billet is of a size of 200 × 200mm
2.
Wire rod and production method thereof for Stranded Galvanized Steel Wire of the present invention, have following beneficial effect:
(1) wire rod mechanical stretch tensile strength reaches 1240～1330MPa, relative reduction in area is 40～54%, poker characteristic significantly improves, tensile strength is with the poor 60MPa that is not more than of circle, 1% elongation stress and the tensile strength ratio of 2.18mm galvanized steel wire of processing has reached 0.87, and the performance index such as torsion, winding, elongation are completely qualified;
(2) wire rod sorbite percentage is not less than 85%, and center carbide network, center martensite are not more than 1.0 grades;
(3) autstenitic grain size >=7 grade, all kinds of non-metallic inclusion individual events all≤1.5 grades.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but this embodiment should not be construed as limitation of the present invention.
Embodiment 1:
The present embodiment Stranded Galvanized Steel Wire with the weight percent of each component in wire rod is: C:0.83%, Mn:0.73%, Si:0.28%, Cr:0.32%, P:0.015%, S:0.012%, N:0.0065%, all the other are Fe and inevitable impurity.
The production method of wire rod for the present embodiment Stranded Galvanized Steel Wire, comprises the following steps: blast-melted → desulfurizing iron → converter smelting → Argon → LF refining → VD is degassed → control of continuous casting steel machine → strand cleaning → square billet heating → high speed wire rolling → stelmor is cold → collect volume → P/F line transport → bundling.Wherein, 1680 DEG C of tapping temperatures in converter smelting step, tapping carbon content 0.063%, adopts the refinery practices such as the degassed and soft blow of BOTTOM ARGON BLOWING, LF refining, VD can adjust and the even chemical composition in steel, reduces and is mingled with and gas content; In continuous casting steel machine step, in continuous casting, wrap 27 DEG C of molten steel overheats, pulling rate is 1.30m/min, crystallizer adopts induction stirring, and (stir current is 330A, frequency is 3.0Hz), continuous casting adopts four rollers gently to depress, every roller draught is respectively 2.0mm, 3.5mm, 3.0mm and 3.0mm, and Cross Section of CC Billet is of a size of 200 × 200mm
2; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1080 DEG C, and rolling specs is φ 6.5mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.70m/s.
Stranded Galvanized Steel Wire of the present invention reaches 1170～1220MPa by the tensile strength of wire rod, relative reduction in area is 40～43%, sorbite percentage is 90%, center carbide network is 0.5 grade, 0 grade of center martensite, 8 grades of autstenitic grain sizes, A, B, C, D inclusion are respectively 1.0 grades, 1.5 grades, 0 grade, 1.0 grades.
Embodiment 2:
The present embodiment Stranded Galvanized Steel Wire with the weight percent of each component in wire rod is: C:0.83%, Mn:0.74%, Si:0.26%, Cr:0.28%, P:0.020%, S:0.008%, N:0.0056%, all the other are Fe and inevitable impurity.
The production method of wire rod for the present embodiment Stranded Galvanized Steel Wire, comprises the following steps: blast-melted → desulfurizing iron → converter smelting → Argon → LF refining → VD is degassed → control of continuous casting steel machine → strand cleaning → square billet heating → high speed wire rolling → stelmor is cold → collect volume → P/F line transport → bundling.Wherein, 1661 DEG C of tapping temperatures in converter smelting step, tapping carbon content 0.070%, adopts the refinery practices such as the degassed and soft blow of BOTTOM ARGON BLOWING, LF refining, VD can adjust and the even chemical composition in steel, reduces and is mingled with and gas content; In continuous casting steel machine step, in continuous casting, wrap 26 DEG C of molten steel overheats, pulling rate is 1.30m/min, crystallizer adopts induction stirring, and (stir current is 330A, frequency is 3.0Hz), continuous casting adopts four rollers gently to depress, every roller draught is respectively 2.5mm, 2.0mm, 3.0mm and 3.0mm, and Cross Section of CC Billet is of a size of 200 × 200mm
2; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1110 DEG C, and rolling specs is φ 8.0mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.83m/s.
Stranded Galvanized Steel Wire of the present invention reaches 1160～1180MPa by the tensile strength of wire rod, relative reduction in area is 41～42%, sorbite percentage 90%, 0.5 grade of center carbide network, 0 grade of center martensite, 8 grades of autstenitic grain sizes, A, B, C, D inclusion are respectively 0 grade, 1.0 grades, 0 grade, 1.0 grades.
Embodiment 3:
The present embodiment Stranded Galvanized Steel Wire with the weight percent of each component in wire rod is: C:0.87%, Mn:0.75%, Si:0.25%, Cr:0.16%, P:0.018%, S:0.006%, N:0.0046%, all the other are Fe and inevitable impurity.
The production method of wire rod for the present embodiment Stranded Galvanized Steel Wire, comprises the following steps: blast-melted → desulfurizing iron → converter smelting → Argon → LF refining → VD is degassed → control of continuous casting steel machine → strand cleaning → square billet heating → high speed wire rolling → stelmor is cold → collect volume → P/F line transport → bundling.Wherein, 1680 DEG C of tapping temperatures in converter smelting step, tapping carbon content 0.087%, adopts the refinery practices such as the degassed and soft blow of BOTTOM ARGON BLOWING, LF refining, VD can adjust and the even chemical composition in steel, reduces and is mingled with and gas content; In continuous casting steel machine step, in continuous casting, wrap 28 DEG C of molten steel overheats, pulling rate is 1.20m/min, crystallizer adopts induction stirring, and (stir current is 330A, frequency is 3.0Hz), continuous casting adopts four rollers gently to depress, every roller draught is respectively 3.0mm, 3.5mm, 3.5mm and 3.5mm, and Cross Section of CC Billet is of a size of 200 × 200mm
2; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1050 DEG C, and rolling specs is φ 9.0mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.91m/s.
Stranded Galvanized Steel Wire of the present invention with the tensile strength of wire rod reach 1240～1330MPa, relative reduction in area is 52～54%, sorbite percentage 95%, 1.0 grades of center carbide networks, 0 grade of center martensite, 8 grades of autstenitic grain sizes, A, B, C, D inclusion are respectively 1.0 grades, 0 grade, 0 grade, 0.5 grade.
As can be seen from the above-described embodiment, the Stranded Galvanized Steel Wire wire rod that adopts the present invention to produce has high purity, composition and homogeneous microstructure and the good feature of poker characteristic of wire rod steel, can meet the technical requirements of wire fabrication industry to product innovation completely.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
The content not being described in detail in this specification sheets belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. a Stranded Galvanized Steel Wire wire rod, it is characterized in that: in described wire rod, the weight percent of each component is: C:0.80～0.90%, Mn:0.60～0.90%, Si:0.15～0.35%, Cr≤0.40%, P≤0.025%, S≤0.015%, N≤0.0070%, all the other are Fe and inevitable impurity.
2. Stranded Galvanized Steel Wire wire rod according to claim 1, it is characterized in that: in described wire rod, the weight percent of each component is: C:0.83%, Mn:0.75%, Si:0.25%, Cr:0.32%, P:0.018%, S:0.008%, N:0.0056%, all the other are Fe and inevitable impurity.
3. the production method of Stranded Galvanized Steel Wire use wire rod described in a claim 1, it is characterized in that: comprise the following steps: blast-melted → desulfurizing iron → converter smelting → Argon → LF refining → VD is degassed → and the control of continuous casting steel machine → strand cleaning → square billet heating → high speed wire rolling → stelmor is cold → collection volume → P/F line transport → bundling, wherein, carbon content≤0.10% of tapping in converter smelting step; In continuous casting steel machine step, in continuous casting, wrapping molten steel overheat is 25～35 DEG C, and pulling rate is 1.10～1.50m/min, and crystallizer adopts induction stirring, and continuous casting adopts and gently depresses, and total reduction is 10～15mm; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1050～1110 DEG C, and rolling specs is φ 5.5～12.5mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.70～0.91m/s.
4. the production method of wire rod for Stranded Galvanized Steel Wire according to claim 3, is characterized in that: the carbon content of tapping in converter smelting step is 0.070%; In continuous casting steel machine step, in continuous casting, wrapping molten steel overheat is 28 DEG C, and pulling rate is 1.30m/min, and stirring parameter comprises the operating frequency of stir current and the 3.0Hz of 330A, and continuous casting total reduction is 11.5mm; In high speed wire rolling step, the steel billet tapping temperature of high line process furnace is 1080 DEG C, and rolling specs is φ 6.5mm; In the cold step of stelmor control, the roller table speed of stelmor fans entrance is 0.83m/s.
5. the production method with wire rod according to Stranded Galvanized Steel Wire described in claim 3 or 4, is characterized in that: described Argon step adopts bottom argon blowing technology.
6. the production method with wire rod according to Stranded Galvanized Steel Wire described in claim 3 or 4, is characterized in that: in described continuous casting steel machine step, Cross Section of CC Billet is of a size of 200 × 200mm
2.
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| CN201410182919.7A CN103938071A (en) | 2014-04-30 | 2014-04-30 | Wire for stranded galvanized steel wire and production method of wire |
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| CN201410182919.7A CN103938071A (en) | 2014-04-30 | 2014-04-30 | Wire for stranded galvanized steel wire and production method of wire |
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Cited By (9)
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| CN104451434A (en) * | 2014-11-07 | 2015-03-25 | 江苏天舜金属材料集团有限公司 | Strongly corrosion-resistant stranded galvanized steel wire and manufacturing method thereof |
| CN104745790A (en) * | 2015-04-10 | 2015-07-01 | 武钢集团昆明钢铁股份有限公司 | Method for softening and rolling cold forging steel |
| CN104946977A (en) * | 2015-05-28 | 2015-09-30 | 武汉钢铁(集团)公司 | Low temperature-resistant high strength anchor bar steel and production method thereof |
| CN105002417A (en) * | 2015-06-30 | 2015-10-28 | 武汉钢铁(集团)公司 | Wire rod for high-carbon steel cut wire shot and production method thereof |
| CN107511406A (en) * | 2017-08-03 | 2017-12-26 | 慈溪市龙山汽配有限公司 | A kind of drawing process of wiper arm |
| CN108252133A (en) * | 2017-12-08 | 2018-07-06 | 天津冶金集团中兴盛达钢业有限公司 | Super large-scale low relaxed prestress steel strand and its manufacturing method |
| CN109338770A (en) * | 2018-12-11 | 2019-02-15 | 天津冶金集团中兴盛达钢业有限公司 | A kind of long-span electric transmission line super extra-high strong galvanized strand wires and its twisting method |
| CN110438411A (en) * | 2019-08-31 | 2019-11-12 | 武汉钢铁有限公司 | A kind of flattening steel wire wire rod and its production method for exempting recrystallization annealing process |
| CN113802059A (en) * | 2021-08-17 | 2021-12-17 | 首钢集团有限公司 | Steel for large-span high-strength cable core and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451434A (en) * | 2014-11-07 | 2015-03-25 | 江苏天舜金属材料集团有限公司 | Strongly corrosion-resistant stranded galvanized steel wire and manufacturing method thereof |
| CN104745790A (en) * | 2015-04-10 | 2015-07-01 | 武钢集团昆明钢铁股份有限公司 | Method for softening and rolling cold forging steel |
| CN104745790B (en) * | 2015-04-10 | 2017-01-25 | 武钢集团昆明钢铁股份有限公司 | Method for softening and rolling cold forging steel |
| CN104946977A (en) * | 2015-05-28 | 2015-09-30 | 武汉钢铁(集团)公司 | Low temperature-resistant high strength anchor bar steel and production method thereof |
| CN105002417A (en) * | 2015-06-30 | 2015-10-28 | 武汉钢铁(集团)公司 | Wire rod for high-carbon steel cut wire shot and production method thereof |
| CN107511406A (en) * | 2017-08-03 | 2017-12-26 | 慈溪市龙山汽配有限公司 | A kind of drawing process of wiper arm |
| CN108252133A (en) * | 2017-12-08 | 2018-07-06 | 天津冶金集团中兴盛达钢业有限公司 | Super large-scale low relaxed prestress steel strand and its manufacturing method |
| CN109338770A (en) * | 2018-12-11 | 2019-02-15 | 天津冶金集团中兴盛达钢业有限公司 | A kind of long-span electric transmission line super extra-high strong galvanized strand wires and its twisting method |
| CN109338770B (en) * | 2018-12-11 | 2021-12-07 | 天津市新天钢中兴盛达有限公司 | Super-extra-high-strength galvanized steel strand for long-span transmission line |
| CN110438411A (en) * | 2019-08-31 | 2019-11-12 | 武汉钢铁有限公司 | A kind of flattening steel wire wire rod and its production method for exempting recrystallization annealing process |
| CN113802059A (en) * | 2021-08-17 | 2021-12-17 | 首钢集团有限公司 | Steel for large-span high-strength cable core and preparation method thereof |
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Application publication date: 20140723 |