CN103834848B - A kind of boracic compressor wire and steel strand steel and smelting technology thereof - Google Patents
A kind of boracic compressor wire and steel strand steel and smelting technology thereof Download PDFInfo
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Abstract
The invention belongs to technical field of smelting, relate in particular to the smelting technology of a kind of boracic compressor wire and steel strand steel.Adopt raw material molten iron, steel scrap and the pig iron; In converter steelmaking process, add slag charge, and carry out and highly draw operation of re-blowing, terminal C controls more than 0.4%, and terminal P controls less than 0.015%; Deoxidation material silicon carbide, lime and alloy is added successively with steel stream during converter tapping; Refining process adopts silicon carbide to carry out top of the slag deoxidation, target refining finishing slag basicity 1.7; After refining departures, Ladle Bottom soft blow argon; During continuous casting, crystallizer uses west to protect special high carbon steel covering slag; Crystallizer uses induction stirring, and adopt low overheat casting, two cold employings are cold by force, use end induction stirring.The boracic compressor wire smelted by the present invention and steel strand steel, can ensure that chemical composition is qualified, and mother metal effectively can reduce the breaks because casting billet surface hereditary defect, inclusion and carbon segregation cause when drawing and twisting.
Description
Technical field
The invention belongs to technical field of smelting, relate in particular to a kind of prestressing steel and preparation method thereof.
Background technology
High strength low relaxed prestress concrete structure steel wire and steel strand are high-effect steel, be widely used in the engineering fields such as Highrise buildings, Longspan Bridge, petrochemical complex and railway, there is high strength, high tenacity, low relaxation, the performance such as corrosion-resistant, belong to the rigid line product of high-tech content, high added value.
The usage quantity of 1860 grades of prestressed concrete structure steel wires and steel strand is maximum in the market, and the main raw material producing this series products is that the gren rod of Φ 11 ~ 13mm becomes compressor wire and steel strand through drawing, twisting.Because user no longer carries out lead bath process to wire rod before manufacture, and use high speed and automatic equipment to carry out continuous drawing, and require the finished product obtaining excellent mechanical performances, thus wire rod should have the metallographic structure that high precision size, stable chemical composition, pure steel, good mechanical property and sorbitic rate reach more than 80 ~ 85%.
Therefore quite harsh to the production requirement of compressor wire and steel strand steel, the smelting process for production in steel-making has the main points of the following aspects: (1) strictly controls chemical composition, makes composition narrow fluctuation range, carries out microalloy treatment simultaneously.Chemical Composition Control is one of important factor affecting mother metal mechanical property, because wire rod specification is comparatively large, can add a small amount of Cr and B element carries out microalloy treatment in production practice, improve wire rod hardening capacity on the one hand, on the other hand crystal grain thinning.But after adding B element, easily cause slab surface crack.(2) ensure Cleanliness of Molten Steel, reduce large inclusions and obnoxious flavour content.In mother metal, larger brittle inclusion can cause wire rod drawing fracture, therefore, by suitable furnace outer refining process and slag compound composition, floats and while absorption, improve inclusion plastic deformation ability at promotion endogenous inclusion; Casting process protective casting, reduces the suction of obnoxious flavour, notes crystallizer technological operation, avoids slag to cause larger external inclusion.(3) strand Central Carbon Segregation is controlled.Research shows, the serious carbon segregation in strand center can cause wire rod heart portion to occur cementite network or martensite friable tissues, and wire rod is easy fracture in drawing and twisting process.
The important indicator weighing compressor wire and steel strand steel quality has two aspects, and one is that every mechanical property of final finished meets the requirements.This more easily meets at present, controls chemical composition and rolling cooling system well just can realize.Two is reduce or avoid the fracture of mother metal in drawing and twisting process.Mother metal fracture in process of production can directly affect production efficiency, production cost and final product quality, for steel-making aspect, control steel inclusion, cc billet surface quality, Central Carbon Segregation are the three large key factors affecting mother metal fracture, are also that each produces the difficult problem of producing house and running at present.
Summary of the invention
Technical problem to be solved by this invention is: the present invention is directed to boracic compressor wire and steel strand steel provides a kind of smelting technology, ensures that chemical composition is qualified, and as much as possible reduces steel inclusion, improve steel purity; Ensure cc billet surface quality, reduce wire rod surface imperfection; Reduce strand Central Carbon Segregation as far as possible, the cementite network avoiding stocking center to cause because of carbon segregation and martensite, finally reach boracic compressor wire and steel strand steel wire rod while meeting mechanical property, reduce the object even stopped wire rod and occur rupturing in drawing, twisting process.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the invention provides a kind of boracic compressor wire and steel strand smelting steel technique, comprise production stages such as adding raw material, converter smelting, refining and continuous casting, concrete operations are as follows:
(1) raw material molten iron, steel scrap and the pig iron is added in converter,
Molten iron require: Si:0.20 ~ 0.80%(constituent content is massfraction, lower with), P≤0.12%, S≤0.035%, temperature T >=1280 DEG C,
Steel scrap accounts for the proportion 10% ~ 15% of raw material total amount, and the proportion that the pig iron accounts for raw material total amount is 3% ~ 10%, and the total Intake Quantity of raw material is stabilized in 130 ~ 140t/ stove;
(2) in converter steelmaking process, add slag charge 8 ~ 10t/ stove, and carry out and highly draw operation of re-blowing, converter tapping terminal C controls more than 0.4%, terminal P controls less than 0.015%, tapping temperature is at 1620 DEG C ~ 1660 DEG C, and smelting cycle is 28-32 minutes, and height draws re-blows in operation, after-blow number of times is not more than 1 time, tap 1/4 time add silicon carbide, alloy and lime successively with steel stream, tapping time controling 4 ~ 5 minutes, alloy amount as far as possible once fills up, refining add that alloy amount should be less than alloy total amount 10%, further, slag is forbidden in tapping process
Above-mentioned slag charge is lime, rhombspar or magnesium ball,
Silicon carbide, alloy and lime is added successively with steel stream during above-mentioned tapping 1/4, alloy and lime, alloy is silicomanganese, high carbon ferromanganese and high carbon ferro-chrome, and add-on is: silicon carbide 200 ~ 260kg/ stove, silicomanganese 8.5 ~ 9.0kg/t, high carbon ferromanganese 1.2 ~ 1.7kg/t, high carbon ferro-chrome 4.8 ~ 5.2kg/t and lime 600 ~ 800kg/ stove
As preferably: during tapping, ladle does not use Aluminum steel to have enough to meet the need used ladle, prevents from increasing aluminium in ladle, ladle first time more than light maintenance state in addition must not be used in the steel grade in the present invention;
(3) refining process adopts silicon carbide to carry out top of the slag deoxidation, can add a small amount of calcium carbide if needed and carry out deoxidation, prohibit the use containing aluminium class deoxidation material.Refining adds lime and appropriate fluorite depending on slag condition in batches, refining slag target basicity 1.5-2.0, the omnidistance Bottom Argon Stirring of refining, pressure 0.8 ~ 1.0MPa, flow 200 ~ 250/min, to go out before refining position 6 minutes, adds ferro-boron 18-22kg/ stove, after refining departures, carry out the operation of Ladle Bottom soft blow argon
As preferably: Silicon carbide addition is 240kg/ stove, it is 1.7 that refining slag target basicity controls, refining time >=35 minute, white slag time >=20 minutes, refining departures after, Ladle Bottom soft blow argon >=15 minute, argon pressure suitably (0.8 ~ 1.0MPa), avoid molten steel to occur turning over greatly, during soft blow, do not feed silicon-calcium wire
Refining finishing slag is mainly CaO and SiO
2binary slag system, makes the composition of the composition of inclusion and finishing slag basically identical, and concrete refining finishing slag compound composition is shown in Table 1;
Table 1SWRH82B-B refining finishing slag composition %
| CaO | SiO2 | Al2O3 | MgO | MnO | FeO | R |
| 50.1～58.6 | 27.1～34.0 | 3.3～6.4 | 2.6～5.6 | 0.1～0.8 | 0.3～1.3 | 1.5～2.0 |
(4) continuous casting whole process notes molding casting, and ladle is to the protection of tundish long nozzle argon envelope, and tundish upper nozzle is in-built, and middle bag uses alkaline covering agent and carbonization rice husk bilayer to cover, and crystallizer adopts non-sinusoidal oscillation, and uses low melting point and low viscous covering slag,
Crystallizer adopts non-sinusoidal oscillation, frequency 100 ± 40Hz, deviation proportion 15%, amplitude ± 3mm; Crystallizer uses west to protect special LMP, low viscosity (fusing point 1020-1040 DEG C, viscosity is less than 0.3 (Pa.s/1300 DEG C)) high carbon steel covering slag, submerged nozzle depth of penetration 100 ~ 120mm, and the mouth of a river is changed 6 ~ 7 hours duration of service;
(5) even water heat and carry out low overheat casting, superheating temperature controls 20 ~ 30 DEG C, and pulling rate is 1.70 ~ 1.80m/min, the strong cold pattern of two cold employings, and crystallizer adopts induction stirring, and uses end induction stirring,
Connect and water heat superheating temperature control 20 ~ 30 DEG C, pulling rate 1.75 ± 0.05m/min, cast that casting process realizes substantially " permanent pulling rate ", prevents slag entrapment in mold,
Crystallizer adopts induction stirring, stir current scope 210 ~ 230A, range of frequency 3 ~ 5HZ, adopts continuously stirring pattern; Use end induction stirring, end is stirred and is installed casting stream position 7.0 ~ 7.5m, and stir current scope 330 ~ 350A, range of frequency 6 ~ 8HZ, adopt continuously stirring pattern,
The strong cold pattern of two cold employings, specific water 0.8-1.0L/kg, sufficient roller section be full water cooling but, two cold other 3 sections be aerosol cooling, and ensure that straightening section temperature is greater than 960 DEG C.
Beneficial effect of the present invention is:
The boracic compressor wire smelted by the present invention and steel strand steel, can ensure that chemical composition is qualified, and mother metal effectively can reduce the breaks because casting billet surface hereditary defect, inclusion and carbon segregation cause when drawing and twisting, mainly contain following three critical control point: (1) promotes that in molten steel, large inclusions floats and improves inclusion modification ability.Smelt in whole process and adopt silicon, manganese deoxidation, do not use the material deoxidation containing aluminium, do not add calcic class reductor as far as possible, as calcium carbide; After refining departures, the soft blow time is no less than 15min, and do not feed the agent of the inclusion modification such as silicon-calcium wire, calcium line during soft blow, refining finishing slag basicity controls about 1.70.(2) good cc billet surface quality, flawless, secondary solidify the defects such as the slag runner of formation.(3) rational continuous casting process, the strict strand Central Carbon Segregation index that controls is less than 1.20.
Accompanying drawing explanation
Accompanying drawing 1: embodiment part, carry out carbon segregation detect time get a position.
Embodiment
Embodiment 1(heat (batch) number 813100030)
(1) add raw material molten iron, steel scrap and the pig iron in converter, wherein, molten iron requires: Si:0.5%, P:0.1%, S:0.020, temperature T=1300 DEG C, and the proportion that steel scrap accounts for raw material total amount is 10%; The proportion that the pig iron accounts for raw material total amount is 5%; The total Intake Quantity of raw material is stabilized in 140t/ stove;
(2) in converter steelmaking process, add slag charge rhombspar 10t/ stove, and carry out and highly draw operation of re-blowing, after-blow number of times is 1 time;
Tapping, converter tapping terminal C controls 0.4%, terminal P controls 0.015%, Tapping Temperature of Bof controls at 1660 DEG C, tap 1/4 time with steel stream add successively (based on the amount of raw material) silicon carbide 240kg/ stove, silicomanganese 8.8kg/t, high carbon ferromanganese 1.5kg/t, high carbon ferro-chrome 5.0kg/t and 600kg/ hearthstone ash, the tapping time is 5 minutes, and, forbid slag in tapping process;
(3) refining process adopts silicon carbide to carry out top of the slag deoxidation, and add-on is 240kg/ stove, target refining finishing slag basicity 1.7, the omnidistance Bottom Argon Stirring of refining, pressure 0.8MPa, flow 200/min, to go out before refining position 6 minutes, add ferro-boron 20kg/ stove, after refining departures, carry out the operation of Ladle Bottom soft blow argon
Refining time 45 minutes, 25 minutes white slag time, after refining departures, Ladle Bottom soft blow argon 20 minutes, argon pressure suitably (0.8MPa), is avoided molten steel to occur turning over greatly, is not fed silicon-calcium wire or calcium line during soft blow;
(4) during continuous casting, use full guard cast from ladle to tundish, ladle is to the protection of middle water containing opening argon envelope, and the in-built or integral water gap of tundish upper nozzle, uses alkaline covering agent and the double-deck covering of carbonization rice husk,
Crystallizer uses west to protect special high carbon steel covering slag, (fusing point 1020 DEG C, viscosity is less than 0.3 (Pa.s/1300 DEG C)), submerged nozzle depth of penetration 100mm, and the mouth of a river is changed 6 hours duration of service,
Crystallizer adopts non-sinusoidal oscillation, frequency 80Hz, deviation proportion 15%, amplitude ± 3mm;
(5) connect and water heat superheating temperature and control 20 DEG C, pulling rate 1.70m/min, the strong cold pattern of two cold employings, specific water 0.9L/kg, sufficient roller section be full water cooling but, two cold other 3 sections cool for aerosol; Crystallizer adopts induction stirring, mixing parametric 220A/4HZ, continuously stirring pattern; Adopt end induction stirring, end is stirred and is installed casting stream position 7.3m, mixing parametric 350A/8HZ, continuously stirring pattern.
Embodiment 2(heat (batch) number 813100031)
(1) add raw material molten iron, steel scrap and the pig iron in converter, wherein, molten iron requires: Si:0.7%, P:0.11%, S:0.030, all the other operations are identical with embodiment 1.
Embodiment 3(heat (batch) number 813100032)
(1) add raw material molten iron, steel scrap and the pig iron in converter, wherein, molten iron requires: Si:0.8%, P:0.12%, S:0.025, all the other operations are identical with embodiment 1.
Embodiment 4(heat (batch) number 813100033)
In step (2), in converter steelmaking process, the slag charge added is lime 8t/ stove, and all the other operations are identical with embodiment 1.
Embodiment 5(heat (batch) number 813100034)
In step (1), molten iron temperature is 1280 DEG C, and all the other operations are identical with embodiment 1.
Embodiment 6(heat (batch) number 813100035)
In step (2), in converter steelmaking process, the slag charge added is magnesium ball 9t/ stove, and all the other operations are identical with embodiment 1.
Embodiment 7(heat (batch) number 813100036)
In step (2), Tapping Temperature of Bof is 1620 DEG C, and all the other operations are identical with embodiment 1.
Embodiment 8(heat (batch) number 813100037)
In step (2), tapping time controling 4 minutes, all the other operations are identical with embodiment 1.
Embodiment 9(heat (batch) number 813100038)
In step (2), tapping time controling 4.5 minutes, all the other operations are identical with embodiment 1.
Embodiment 10(heat (batch) number 813100039)
In step (3), refining time 35 minutes, 20 minutes white slag time, all the other operations are identical with embodiment 1.
Embodiment 11(heat (batch) number 813100040)
In step (3), refining time 50 minutes, 20 minutes white slag time, all the other operations are identical with embodiment 1.
Embodiment 12(heat (batch) number 813100041)
In step (3), refining time 60 minutes, 30 minutes white slag time, all the other operations are identical with embodiment 1.
Embodiment 13(heat (batch) number 813100042)
In step (1), molten iron requires: Si:0.45%, P:0.08%, S:0.025; In step (3), refining time 50 minutes, 30 minutes white slag time, all the other operations are identical with embodiment 1.
Embodiment 14(heat (batch) number 813100043)
In step (2), Tapping Temperature of Bof is 1650 DEG C; In step (3), refining time 35 minutes, 35 minutes white slag time, all the other operations are identical with embodiment 1.
Embodiment 15(heat (batch) number 813100044)
In step (2), Tapping Temperature of Bof is 1630 DEG C; In step (2), tapping time controling 4 minutes; In step (3), refining time 40 minutes, 25 minutes white slag time, all the other operations are identical with embodiment 1.
The chemical composition of the SWRH82B-B obtained by embodiment 1-15, gas content are respectively in shown in table 2 and table 3:
Table 2SWRH82B-B chemical composition
| Heat (batch) number | C | Si | Mn | P | S | Cr | Ni | Cu | Al | As | B |
| 813100030 | 0.82 | 0.23 | 0.76 | 0.015 | 0.009 | 0.22 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0021 |
| 813100031 | 0.81 | 0.26 | 0.75 | 0.016 | 0.015 | 0.25 | 0.01 | 0.01 | 0.002 | 0.003 | 0.0018 |
| 813100032 | 0.83 | 0.24 | 0.73 | 0.014 | 0.012 | 0.29 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0020 |
| 813100033 | 0.84 | 0.27 | 0.76 | 0.014 | 0.014 | 0.30 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0020 |
| 813100034 | 0.83 | 0.27 | 0.76 | 0.015 | 0.014 | 0.31 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0021 |
| 813100035 | 0.80 | 0.22 | 0.71 | 0.012 | 0.011 | 0.29 | 0.01 | 0.01 | 0.002 | 0.004 | 0.0022 |
| 813100036 | 0.81 | 0.26 | 0.75 | 0.012 | 0.008 | 0.32 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0024 |
| 813100037 | 0.80 | 0.24 | 0.75 | 0.011 | 0.009 | 0.30 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0021 |
| 813100038 | 0.82 | 0.26 | 0.76 | 0.013 | 0.011 | 0.33 | 0.01 | 0.01 | 0.002 | 0.003 | 0.0024 |
| 813100039 | 0.81 | 0.24 | 0.74 | 0.014 | 0.014 | 0.32 | 0.01 | 0.01 | 0.005 | 0.002 | 0.0020 |
| 813100040 | 0.81 | 0.26 | 0.74 | 0.012 | 0.009 | 0.30 | 0.01 | 0.01 | 0.005 | 0.002 | 0.0024 |
| 813100041 | 0.84 | 0.27 | 0.73 | 0.012 | 0.010 | 0.32 | 0.01 | 0.01 | 0.004 | 0.002 | 0.0022 |
| 813100042 | 0.80 | 0.24 | 0.73 | 0.016 | 0.007 | 0.33 | 0.01 | 0.01 | 0.004 | 0.003 | 0.0021 |
| 813100043 | 0.80 | 0.25 | 0.75 | 0.015 | 0.010 | 0.32 | 0.00 | 0.01 | 0.001 | 0.003 | 0.0019 |
| 813100044 | 0.81 | 0.24 | 0.74 | 0.013 | 0.010 | 0.32 | 0.01 | 0.01 | 0.003 | 0.003 | 0.0021 |
Table 3SWRH82B-B gas content
Carbon segregation index is shown in Table 4, and carbon segregation adopts Φ 5mm drill bit to get a drilling cuttings, gets a position as shown in Figure 1, then uses carbon sulphur instrument to carry out carbon content analysis.
Table 4SWRH82B-B strand Central Carbon Segregation index
| Strand number | Superheating temperature | Pulling rate | Central Carbon Segregation index |
| 813100030-2 | 28 | 1.81 | 1.13 |
| 813100031-4 | 29 | 1.71 | 1.19 |
| 813100032-5 | 28 | 1.74 | 1.16 |
| 813100033-7 | 25 | 1.76 | 1.10 |
| 813100034-9 | 25 | 1.79 | 1.08 |
Claims (4)
1. a boracic compressor wire and steel strand smelting steel technique, is characterized in that: this technique comprises converter smelting, refining and continuous casting, and concrete operations are as follows:
(1) in converter, add raw material molten iron, steel scrap and the pig iron, the proportion that steel scrap accounts for raw material total amount is 10% ~ 15%, and the total Intake Quantity of raw material is stabilized in 130 ~ 140t/ stove;
(2) in converter steelmaking process, add slag charge, and carry out and highly draw operation of re-blowing, converter tapping terminal C controls more than 0.4%, and terminal P controls less than 0.015%, and tapping temperature scope control is at 1620 ~ 1660 DEG C; Add silicon carbide, alloy and lime successively with steel stream during converter tapping, alloy is silicomanganese, high carbon ferromanganese and high carbon ferro-chrome, and, forbid slag in tapping process,
Converter tapping terminal C controls 0.4% ~ 0.70%; Silicon carbide 200 ~ 260kg/ stove, silicomanganese 8.5 ~ 9.0kg/t, high carbon ferromanganese 1.2 ~ 1.7kg/t, high carbon ferro-chrome 4.8 ~ 5.2kg/t and lime 600 ~ 800kg/ stove is added during tapping;
(3) refining process adopts silicon carbide to carry out top of the slag deoxidation, target refining finishing slag basicity 1.5 ~ 2.0, and the omnidistance Bottom Argon Stirring of refining, before going out refining position, adds ferro-boron, after refining departures, carries out the operation of Ladle Bottom soft blow argon;
(4) continuous casting whole process notes molding casting, and ladle is to the protection of tundish long nozzle argon envelope, and tundish upper nozzle is in-built; middle bag uses alkaline covering agent and carbonization rice husk bilayer to cover; crystallizer adopts non-sinusoidal oscillation, and uses low melting point and low viscous covering slag
Crystallizer adopts non-sinusoidal oscillation, frequency 100 ± 40Hz, deviation proportion 15%, amplitude ± 3mm; Crystallizer protecting residue uses west to protect special high carbon steel covering slag, and fusing point is 1020 DEG C-1040 DEG C, and viscosity is less than 0.3Pa.s; Submerged nozzle depth of penetration 100 ~ 120mm, the mouth of a river is changed 6 ~ 7 hours duration of service;
(5) even water heat and carry out low overheat casting, superheating temperature controls 20 ~ 30 DEG C, and pulling rate is 1.70 ~ 1.80m/min, the strong cold pattern of two cold employings, and crystallizer adopts induction stirring, and uses end induction stirring,
Crystallizer adopts induction stirring, stir current scope 210 ~ 230A, range of frequency 3 ~ 5HZ, adopts continuously stirring pattern; Use end induction stirring, end is stirred and is installed casting stream position 7.0 ~ 7.5m, and stir current scope 330 ~ 350A, range of frequency 6 ~ 8HZ, adopt continuously stirring pattern,
The strong cold pattern of two cold employings, specific water is 0.8 ~ 1.0L/kg, sufficient roller section be full water cooling but, two cold be aerosol cooling, and ensure that straightening section temperature is greater than 960 DEG C.
2. boracic compressor wire as claimed in claim 1 and steel strand smelting steel technique, is characterized in that: in step (3), and it is 1.7 that target refining finishing slag basicity controls, and refining to go out before position 6 minutes, adds ferro-boron 18 ~ 22kg/ stove; After refining departures, Ladle Bottom soft blow argon is greater than 15 minutes, but does not feed silicon-calcium wire or calcium line.
3. boracic compressor wire as claimed in claim 1 and steel strand smelting steel technique, is characterized in that: in step (1), and described molten iron requires Si content to be 0.20 ~ 0.80%, P content≤0.12%, S content≤0.035%.
4. boracic compressor wire as claimed in claim 1 and steel strand smelting steel technique, it is characterized in that: in step (2), described slag charge is lime, rhombspar or magnesium ball.
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| CN107746906A (en) * | 2017-10-20 | 2018-03-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of technique for carrying out pneumatic steelmaking deoxidation alloying using high-manganese pig iron |
| CN109207837A (en) * | 2018-09-25 | 2019-01-15 | 山西通才工贸有限公司 | A method of producing SWRH82B wire rod |
| CN111230061B (en) * | 2020-03-06 | 2021-10-22 | 芜湖新兴铸管有限责任公司 | Method for reducing carbon segregation of medium carbon steel round billet |
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| CN114107837A (en) * | 2021-10-30 | 2022-03-01 | 天津荣程联合金属制品有限公司 | High-strength steel strand and production method thereof |
| CN115433809B (en) * | 2022-08-29 | 2024-01-30 | 包头钢铁（集团）有限责任公司 | Steel smelting production method for high-strength prestressed steel strand with excellent drawing performance |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436657A (en) * | 2013-08-28 | 2013-12-11 | 中天钢铁集团有限公司 | Welding wire steel smelting process capable of preventing welding spatter |
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| JP3539866B2 (en) * | 1998-03-31 | 2004-07-07 | 住友電工スチールワイヤー株式会社 | Steel wire excellent in fatigue property and manufacturing method thereof |
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