CN106191652B - A kind of smelting process reducing spring steel clip sundries - Google Patents

A kind of smelting process reducing spring steel clip sundries Download PDF

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CN106191652B
CN106191652B CN201610651306.2A CN201610651306A CN106191652B CN 106191652 B CN106191652 B CN 106191652B CN 201610651306 A CN201610651306 A CN 201610651306A CN 106191652 B CN106191652 B CN 106191652B
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slag
steel
argon
spring steel
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CN106191652A (en
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徐志东
任安超
张贤忠
邱俊
李媛
吴杰
桂江兵
张帆
夏艳花
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Wuhan Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a kind of smelting processes reducing spring steel clip sundries, include the following steps：1) highcasting speed technique is smelted, and 2) Argon processing, 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows：6) rolling spring steel；Especially, al-free deoxidation is used when highcasting speed technique is smelted, and low basicity slag technique is used when LF stoves refine.The present invention provides a kind of smelting processes reducing spring steel clip sundries, this method is on the basis of having studied the thermodynamics and kinetics of Inclusion Precipitation, deoxidation depth is controlled when passing through smelting, to reduce the content of oxide, low basicity slag technique is conducive to field trash plastification, the field trash of plastification is easy to polymerization and grows up, it is conducive to removal of floating when double refining soft blow, to realize the purpose of control spring steel non-metallic inclusion rank, be fully solved because field trash is exceeded and the problem of causing to change the original sentence to, greatly reduce production cost.

Description

A kind of smelting process reducing spring steel clip sundries
Technical field
The invention belongs to the production technical fields of spring steel, are particularly suitable for a kind of smelting side reducing spring steel clip sundries Method.
Background technology
Spring steel builds required critical material as Grand Equipments manufacture and key state project, is widely used in flying In the various equipment such as the means of transports such as machine, automobile, rail truck and engineering machinery, be the various spiral springs of manufacture, torsional spring, leaf spring and The material of the other shapes spring of its similar effect, uses under high stress state, therefore very high to steel requirement, non-in steel Metallic inclusion destroys the continuity of matrix, is to cause one of spring early fatigue, major cause of failure, improves fatigability One of spring steel research emphasis can be become.
Patent CN104056871B provides a kind of spring steel wire production technology for controlling field trash, de- by controlling The precipitation of oxygen condition, steel inclusion ensure that and generate the low melting point system with good deformability in spring steel 55SiCr steel The required molten steel component of field trash, it is characterized in that making steel inclusion denaturation at low melting point silicates by low alkalinity slag system Field trash, but the shortcomings that this technique is that easily cause Silicate inclusion object in steel exceeded.
Patent CN102162068B provides a kind of spring steel and its manufacture and heat treatment method, production technology are：Electricity Stove-LF-VD- continuous castings-rolling-heat treatment, its advantage is that the intensity of needs, shortcoming can be obtained by heat treatment process For：Basicity of slag control is refined in 2.5-3.0, high alkalinity refining slag system easily leads to B type impurities in steel and is not easy to remove, and influences spring The fatigue behaviour of steel, at the same easily at the mouth of a river dross and cause nozzle blocking influence casting.
Patent CN103510020A provides a kind of spring steel wire rod and its inclusion control method, passes through converter high-carbon Silicomangan carries out deoxidation after tapping and stove, and refining terminal oxygen content in steel control ensures that steel inclusion is wide in 20-40ppm It spends size and is not more than 10um, field trash length-width ratio is more than 3.The disadvantage is that the oxygen content with higher (20-40ppm) in steel, easily Spring nonmetallic inclusionsin steel is caused to increase.
Invention content
The technical problem to be solved by the present invention is to provide a kind of reduction bullet in view of the deficiency of the prior art The smelting process of spring steel clamp sundries, controls spring steel non-metallic inclusion rank, and solution causes to change the original sentence to because field trash is exceeded The problem of, greatly reduce production cost.
The present invention be solve the problems, such as it is set forth above used by technical solution be：
A kind of smelting process reducing spring steel clip sundries, includes the following steps：1) highcasting speed technique is smelted, and 2) it blows Argon processing, 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows：6) rolling spring steel；Especially, highcasting speed technique is smelted Shi Caiyong al-free deoxidations use low basicity slag technique when LF stoves refine.
By said program, in the step 1), using highcasting speed technique, terminal C controls prevent steel 0.10~0.15% Water peroxidating, steel oxygen in water α [O] are 200 × 10-6~350 × 10-6；Latter stage bottom blowing stirring is smelted, promotes steel, slag flat Weighing apparatus keeps the continuous Argon of tapping process, finishing slag basicity control targe：R≥2.5；Using slag trap slag-stopping tapping, tapping temperature control System is at 1650~1670 DEG C, the quantity of slag≤50mm under converter；Using alloying outside stove, deoxidation and alloying is carried out in tapping process, Ensure C, Mn, Si, Cr in GB standard lower limit, while by 70~80kg of ton steel addition active lime, 5~10kg of fluorite and gently It burns 4~5kg of magnesium ball and makes new slag.
Preferably, in the step 1), 16-18kg high purity ferrosilicons, 6-7kg metals is added with molten steel ton steel in tapping process The raw materials such as Mn, 10-12kg high C-Cr iron carry out deoxidation and alloying, ensure C, Mn, Si, Cr in GB standard lower limit.
Specifically, in the step 2), after Argon of arriving at a station, thermometric, sampling are lifted to LF after Argon again is added after alloy Stove.Wherein, molten steel component range is by mass percentage after adding alloy：C 0.56~0.64%, Si 1.60~ 2.00%, Mn 0.70~1.00%, P≤0.025%, S≤0.025%, Cu≤0.25%, Ni≤0.35%, Cr≤ 0.35%.
It is whole in the step 3) to keep Argon by said program, it is suitably added 1.5~2.5kg activity depending on slag condition ton steel Lime, 0.8~1.5kg fluorites adjust slag, and quantity of slag control is 1.2~1.5%, and refining basicity of slag control is 2.5~3.5；Steel When liquid temperature T >=1550 DEG C, the first sample is taken to carry out constituent analysis, by internal control and target component requirements be added alloy adjust it is chemical at Point, after mixing up ingredient, forbid big argon amount stirring to keep molten steel exposed, heating and argon blowing time are not less than 60min.
Preferably, in the step 3), chemical composition is adjusted by internal control and target component requirement, internal control composition is ranging from C0.58~0.62%, Si 1.70~1.90%, Mn 0.70~0.80%, P≤0.020%, S≤0.015%, Cu≤ 0.10%, Ni≤0.10%, Cr 0.15~0.25%；Target component be C 0.60%, Si 1.80%, Mn 0.75%, P≤ 0.020%, S≤0.015%, Cu≤0.10%, Ni≤0.10%, Cr 0.15~0.25%, main component are its range lower limit Addition alloy adjusted to middle limit, be not added with the corresponding alloy more than what is limited in its range.
Specifically, in the step 4), vacuum degree≤100Pa, the vacuum retention time is not less than 20min.
By said program, in the step 5), quartz is added according to slag condition, refining basicity of slag control 1.20~ 1.50, refining slag main component is by mass percentage：CaO 30~50%, SiO230~45%, Al2O3≤ 5%, MgO 8~12%, MgO+MnO+CaO 50~60%, FeO≤1.5%, K2O+Cr2O3+TiO2≤ 5%, whole Argon, argon flow amount 0.25-0.35MPa, soft blow time are not less than 40min.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the present invention provides a kind of smelting process reducing spring steel clip sundries, this method is to have studied Inclusion Precipitation Thermodynamics and kinetics on the basis of, deoxidation depth is controlled when passing through smelting, to reduce the content of oxide, low basicity slag work Skill is conducive to field trash plastification, and the field trash of plastification is easy to polymerization and grows up, and when double refining soft blow is conducive to removal of floating, to The purpose for realizing control spring steel non-metallic inclusion rank, be fully solved because field trash is exceeded and the problem of cause to change the original sentence to, Greatly reduce production cost.
2, in the present invention, the field trash of plastification is conducive to spring steel following process, to improve product performance, Indirectly increase economic benefit.
Description of the drawings
Fig. 1 is the composition distribution of spring steel slag system.
Fig. 2 is the pattern of typical spring steel clip sundries.
Fig. 3 is the power spectrum of typical spring steel clip sundries.
Specific implementation mode
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention is not It is limited only to the following examples.
Embodiment 1
A kind of smelting process reducing spring steel clip sundries, includes the following steps：1) it is smelted using highcasting speed technique, 2) Argon is handled, and 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows 6) rolling spring steel；
1) it is smelted using highcasting speed technique：Using highcasting speed technique, terminal C controls prevent molten steel mistake 0.12% It aoxidizes, dissolved oxygen α [O] is 287 × 10 in steel-6；Latter stage bottom blowing stirring is smelted, promotes steel, slag balance, keeps tapping process continuous Argon, finishing slag basicity control targe：R=3.0；Using slag trap slag-stopping tapping, tapping temperature control is at 1662 DEG C, converter slag Measure 39mm；Using alloying outside stove, 17.6kg high purity ferrosilicons, 6.5kg metals Mn, 11kg is added with molten steel ton steel in tapping process The raw materials such as high C-Cr iron carry out deoxidation and alloying, C, Mn, Si, Cr lower limit in a standard, while active lime is added by ton steel 75kg, fluorite 8.5kg and calcined magnesite ball 4.3kg make new slag；
2) Argon is handled：After Argon of arriving at a station 3min, thermometric, sampling are lifted to LF stoves after Argon 3min again is added after alloy； Wherein, C 0.561%, Si 1.63%, Mn 0.712%, P0.0079%, S0.05%, Cu in molten steel component are added after alloy 0.07%, Ni 0.05%, Cr 0.23%；
3) LF stoves refine：It is suitably added 1.8kg active limes depending on slag condition ton steel, 1.2kg fluorites adjust slag, quantity of slag control 1.27%, basicity of slag 2.85 is refined；When molten steel temperature T is 1568 DEG C, the first sample is taken to carry out constituent analysis, by internal control and target Component requirements adjust chemical composition, be C 0.593% in molten steel component, Si 1.78%, Mn 0.76%, P 0.008%, S0.006%, Cu 0.07%, Ni 0.08%, Cr 0.25%, main component are the addition alloy of its range lower limit to middle limit Adjust, after the corresponding alloy mixes up ingredient, big argon amount stirring forbidden to keep molten steel exposed more than being not added with of being limited in its range, heating plus Argon blowing time 68min；
4) it is vacuum-treated：Vacuum degree≤100Pa, vacuum retention time 27min；
5) LF soft blows：Quartz is added according to slag condition, refining basicity of slag control is 1.27, and refining slag is by mass percentage For：Main component is：CaO 45.187%, SiO235.598%, Al2O34.2%, MgO 9.13%, MgO+MnO+CaO 55%, FeO 0.65%, K2O+Cr2O3+TiO22.16%, whole Argon, argon flow amount 0.28MPa, soft blow time 47min；
6) rolling spring steel：Pair rolling at 8 specifications of Ф spring steel.
Spring steel wire rod A classes 0.5, B classes 0, C classes 0.5, D classes 0 obtained by the present embodiment；Wherein, typical inclusion size exists 3.92um。
Embodiment 2
A kind of smelting process reducing spring steel clip sundries, includes the following steps：1) it is smelted using highcasting speed technique, 2) Argon is handled, and 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows 6) rolling spring steel；
1) it is smelted using highcasting speed technique：Using highcasting speed technique, terminal C controls prevent molten steel mistake 0.10% It aoxidizes, dissolved oxygen α [O] is 347 × 10 in steel-6；Latter stage bottom blowing stirring is smelted, promotes steel, slag balance, keeps tapping process continuous Argon, finishing slag basicity control targe：R=2.8；Using slag trap slag-stopping tapping, tapping temperature control is at 1669 DEG C, converter slag Measure 48mm；Using alloying outside stove, 16.3kg high purity ferrosilicons, 6.6kg metal Mn is added with molten steel ton steel in tapping process, The raw materials such as 11.8kg high C-Cr iron carry out deoxidation and alloying, C, Mn, Si, Cr lower limit in a standard, while being added and living by ton steel Property lime 76kg, fluorite 9kg and calcined magnesite ball 4.8kg make new slag；
2) Argon is handled：After Argon of arriving at a station 3min, thermometric, sampling are lifted to LF stoves after Argon 3min again is added after alloy； Wherein, C 0.62%, Si 1.60%, Mn 0.77%, P 0.0125%, S 0.010%, Cu in molten steel component are added after alloy 0.09%, Ni 0.06%, Cr 0.13%；
3) LF stoves refine：It is suitably added 1.5kg active limes depending on slag condition ton steel, 1.0kg fluorites adjust slag, quantity of slag control 1.38%, basicity of slag 3.2 is refined；When T=1573 DEG C of molten steel temperature, the first sample is taken to carry out constituent analysis, by internal control and target Component requirements adjust chemical composition, be C 0.63% in molten steel component, Si 1.81%, Mn 0.78%, P 0.013%, S0.011%, Cu 0.10%, Ni 0.07%, Cr 0.15%, main component are the addition alloy of its range lower limit to middle limit It adjusts, after the corresponding alloy mixes up ingredient, big argon amount stirring is forbidden to keep molten steel exposed more than being not added with of being limited in its range, heating+ Argon blowing time 63min；
4) it is vacuum-treated：Vacuum degree≤100Pa, vacuum retention time 27min；
5) LF soft blows：Quartz is added according to slag condition, basicity of slag control is in 1.21, refining slag main component： CaO38%, SiO231.40%, Al2O33.844%, MgO 11.8%, MgO+MnO+CaO 50%, FeO 0.87%, K2O+ Cr2O3+TiO23.22%, whole Argon, argon flow amount 0.25MPa, soft blow time 52min；
6) rolling spring steel：Pair rolling at 8 specifications of Ф spring steel.
Spring steel wire rod A classes obtained by the present embodiment are less than 0, B classes 0, C classes 0.5, D classes 0；Typical inclusion size exists 2.45um。
Embodiment 3
A kind of smelting process reducing spring steel clip sundries, includes the following steps：1) it is smelted using highcasting speed technique, 2) Argon is handled, and 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows 6) rolling spring steel；
1) it is smelted using highcasting speed technique：Using highcasting speed technique, terminal C controls prevent molten steel mistake 0.15% It aoxidizes, dissolved oxygen α [O] is 209 × 10 in steel-6；Latter stage bottom blowing stirring is smelted, promotes steel, slag balance, keeps tapping process continuous Argon, finishing slag basicity control targe：R=3.2；Using slag trap slag-stopping tapping, tapping temperature control is at 1652 DEG C, converter slag Measure 47mm；Using alloying outside stove, 17.6kg high purity ferrosilicons, 7kg metals Mn, 11.6kg is added with molten steel ton steel in tapping process The raw materials such as high C-Cr iron carry out deoxidation and alloying, C, Mn, Si, Cr lower limit in a standard, while active lime is added by ton steel 72kg, fluorite 6kg and calcined magnesite ball 5kg make new slag.
2) Argon is handled：After Argon of arriving at a station 3min, thermometric, sampling are lifted to LF stoves after Argon 3min again is added after alloy； Wherein, molten steel component C 0.58%%, Si 1.83%, Mn 0.85%, P 0.009%, S 0.006%, Cu after alloy are added 0.03%, Ni 0.03%, Cr 0.18%；
3) LF stoves refine：It is suitably added 2.2kg active limes depending on slag condition ton steel, 1.3kg fluorites adjust slag, quantity of slag control 1.20%, refining basicity of slag is by 2.6 controls；When molten steel temperature T is 1558 DEG C, the first sample is taken to carry out constituent analysis, by internal control And target component require adjustment chemical composition, molten steel component be C 0.65%, Si 1.85%, Mn 0.87%, P 0.009%, S0.005%, Cu 0.05%, Ni 0.07%, Cr 0.21%, main component are the addition alloy of its range lower limit to middle limit It adjusts, after the corresponding alloy mixes up ingredient, big argon amount stirring is forbidden to keep molten steel exposed more than being not added with of being limited in its range, heating+ Argon blowing time 72min；
4) it is vacuum-treated：Vacuum degree≤100Pa, vacuum retention time 32min；
5) LF soft blows：Quartz is added according to slag condition, basicity of slag control is in 1.32, refining slag main component： CaO39.6%, SiO230%, Al2O34.2%, MgO 12%, MgO+MnO+CaO 53%, FeO 0.84%, K2O+Cr2O3+ TiO22.36%, whole Argon, argon flow amount 0.35MPa, soft blow time 51min；
6) rolling spring steel：Pair rolling at 8 specifications of Ф spring steel.
Spring steel wire rod A classes obtained by the present embodiment are less than 0, B classes 0, C classes 0, D classes 0.5；Typical inclusion size exists 4.6um。
Embodiment 4
A kind of smelting process reducing spring steel clip sundries, includes the following steps：1) it is smelted using highcasting speed technique, 2) Argon is handled, and 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows 6) rolling spring steel；
1) it is smelted using highcasting speed technique：Using highcasting speed technique, terminal C controls prevent molten steel mistake 0.14% It aoxidizes, dissolved oxygen α [O] is 228 × 10 in steel-6；Latter stage bottom blowing stirring is smelted, promotes steel, slag balance, keeps tapping process continuous Argon, finishing slag basicity control targe：R=2.7；Using slag trap slag-stopping tapping, tapping temperature control is at 1659 DEG C, converter slag Amount≤50mm；Using alloying outside stove, 16.3kg high purity ferrosilicons, 6.2kg metal Mn is added with molten steel ton steel in tapping process, The raw materials such as 11.2kg high C-Cr iron carry out deoxidation and alloying, C, Mn, Si, Cr lower limit in a standard, while being added and living by ton steel Property lime 80kg, fluorite 10kg and calcined magnesite ball 4.6kg make new slag.
2) Argon is handled：After Argon of arriving at a station 3min, thermometric, sampling are lifted to LF stoves after Argon 3min again is added after alloy； Wherein, add molten steel component C 0.57% after alloy, Si 1.73%, Mn 0.81%, P 0.005%, S 0.005%, Cu0.02%, Ni 0.05%, Cr 0.21%；
3) LF stoves refine：It is suitably added 1.8kg active limes depending on slag condition ton steel, 1.2kg fluorites adjust slag, quantity of slag control 1.48%, basicity of slag 3.2 is refined；When molten steel temperature T is 1563 DEG C, the first sample is taken to carry out constituent analysis, by internal control and target Component requirements adjust chemical composition, molten steel component be C 0.63%, Si 1.79%, Mn 0.83%, P 0.005%, S0.0045%, Cu 0.03%, Ni 0.07%, Cr 0.22%, main component are the addition alloy of its range lower limit to middle limit It adjusts, more than being not added with of being limited in its range after the corresponding alloy mixes up ingredient, heating+argon blowing time 79min；
4) it is vacuum-treated：Vacuum degree≤100Pa, vacuum retention time 35min；
5) LF soft blows：Quartz is added according to slag condition, basicity of slag control is in 1.49, refining slag main component： CaO49.3%, SiO233.04%, Al2O33.844%, MgO 9.2%, MgO+MnO+CaO 59%, FeO 1.2%, K2O+ Cr2O3+TiO24.62%, whole Argon, argon flow amount 0.25-0.35MPa, the soft blow time is not less than 40min；
6) rolling spring steel：Pair rolling at 8 specifications of Ф spring steel.
Spring steel wire rod A classes obtained by the present embodiment are less than 0, B classes 0, C classes 0, D classes 0；Typical inclusion size is in 2.13um.
Fig. 1 is refining slag control result after statistics production soft blow recently, and Fig. 2-3 is the typical inclusion size under the slag system Size and ingredient situation, low alkalinity refining slag make spring steel composition of inclusions level off to Al2O3-SiO2Low melting point in-CaO systems Plastification section, the field trash of plastification are easy to polymerization and grow up, and when double refining soft blow is conducive to removal of floating, to realize to bullet The control of spring steel nonmetal inclusion size so that the average-size smaller of field trash is more evenly distributed.The method of the invention smelting The spring steel of refining, after pair rolling is at 8 specifications of Ф, spring steel wire rod A classes are less than 1.0, B class 0-0.5, C class 0-0.5, D classes 0- 0.5；Typical inclusion size is in 2~5um.
The above is only a preferred embodiment of the present invention, it is noted that come for those of ordinary skill in the art It says, without departing from the concept of the premise of the invention, several modifications and variations can also be made, these belong to the present invention's Protection domain.

Claims (4)

1. a kind of smelting process reducing spring steel clip sundries, which is characterized in that include the following steps：1) highcasting speed technique carries out Smelt, 2) Argon processing, 3) refining of LF stoves, 4) be vacuum-treated, 5) LF soft blows：6) rolling spring steel；Wherein, highcasting speed technique into Al-free deoxidation is used when row is smelted, and low basicity slag technique is used when LF stoves refine；
In the step 1), using highcasting speed technique, 0.10~0.15%, steel oxygen in water α [O] is 200 for terminal C controls ~350 × 10-6；Latter stage bottom blowing stirring is smelted, the continuous Argon of tapping process, finishing slag basicity control targe are kept：R≥2.5；Using Slag trap slag-stopping tapping, tapping temperature are controlled at 1650~1670 DEG C, the quantity of slag≤50mm under converter；Using alloying outside stove, go out Deoxidation and alloying is carried out during steel, ensures the lower limit of C, Mn, Si, Cr in GB standard, while activity is added by ton steel 70~80kg of lime, 5~10kg of fluorite and 4~5kg of calcined magnesite ball make new slag；
In the step 2), after Argon of arriving at a station, thermometric, sampling are lifted to LF stoves after Argon again is added after alloy；
It is whole in the step 3) to keep Argon, it is suitably added 1.5~2.5kg active limes, 0.8~1.5kg depending on slag condition ton steel Fluorite adjusts slag, and quantity of slag control is 1.2~1.5%, and refining basicity of slag control is 2.5~3.5；Molten steel temperature T >=1550 DEG C When, take the first sample to carry out constituent analysis, alloy, which is added, by internal control and target component requirement adjusts chemical composition, after mixing up ingredient, Heating and argon blowing time are not less than 60min；Wherein, the molten steel component of internal control is by mass percentage：C 0.58~0.62%, Si 1.70~1.90%, Mn 0.70~0.80%, P≤0.020%, S≤0.015%, Cu≤0.10%, Ni≤0.10%, Cr 0.15~0.25%, main component is that the addition alloy of its internal control range lower limit is adjusted to middle limit, more than being limited not in its range Add the corresponding alloy.
2. a kind of smelting process reducing spring steel clip sundries according to claim 1, which is characterized in that described to tap 16-18kg high purity ferrosilicons are added with molten steel ton steel in journey, 6-7kg metals Mn, 10-12kg high C-Cr iron materials carry out deoxidation and conjunction Aurification ensures the lower limit of C, Mn, Si, Cr in GB standard.
3. a kind of smelting process reducing spring steel clip sundries according to claim 1, which is characterized in that the step 4) In, vacuum degree≤100Pa, the vacuum retention time is not less than 20min.
4. a kind of smelting process reducing spring steel clip sundries according to claim 1, which is characterized in that the step 5) In, quartz is added according to slag condition, refining basicity of slag control is 1.20~1.50, and refining slag main component is by mass percentage For：CaO 30~50%, SiO230~45%, Al2O3≤ 5%, MgO 8~12%, MgO+MnO+CaO 50~60%, FeO ≤ 1.5%, K2O+Cr2O3+TiO2≤ 5%, whole Argon, argon flow amount 0.25-0.35MPa, the soft blow time is not less than 40min.
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