CN114130849B - 一种高表面质量殷钢丝材的生产方法 - Google Patents

一种高表面质量殷钢丝材的生产方法 Download PDF

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CN114130849B
CN114130849B CN202111307222.4A CN202111307222A CN114130849B CN 114130849 B CN114130849 B CN 114130849B CN 202111307222 A CN202111307222 A CN 202111307222A CN 114130849 B CN114130849 B CN 114130849B
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gangsi
yan
equal
wire
abrasive belt
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CN114130849A (zh
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孙中华
吴迎飞
杨长龙
孙明成
张坤
孟广济
陈文�
纪彦光
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Hebei Xingtai Cable Co ltd
HBIS Co Ltd
Liaoning Dongke Electric Power Co Ltd
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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Hebei Xingtai Cable Co ltd
HBIS Co Ltd
Liaoning Dongke Electric Power Co Ltd
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/047Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/008Machines comprising two or more tools or having several working posts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B24B21/025Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces for travelling elongated stock, e.g. wire
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/033Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10Handling in a vacuum
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16Remelting metals
    • C22B9/18Electroslag remelting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

一种高表面质量殷钢丝材的生产方法,包括真空熔炼、电渣重熔、锻造成坯、轧制、冷拔、时效热处理工序;轧制工序,包括高温初轧、高温补温、吐丝水冷步骤;所述高温补温步骤补温至1100~1200℃,补温时间0.5~2h;冷拔工序,在拉拔至倒数第二道次前或者拉拔至D>d+0.8mm时进行剥皮和双砂带打磨处理,之后继续拉拔;其中D为拉拔过程中丝材的mm直径,d为成品丝材的mm直径;时效热处理工序,采用保护气氛进行退火处理。本发明适用于生产直径3.0~6.5mm殷钢丝材,所生产的丝材表面光亮,无氧化皮、划痕,无拉拔粉残留,且力学性能良好,丝材抗拉强度≥1100MPa,250mm标距断后延伸率≥5%。

Description

一种高表面质量殷钢丝材的生产方法
技术领域
本发明属于冶金技术领域,具体涉及一种高表面质量殷钢丝材的生产方法。
背景技术
因瓦合金,又称殷钢,因具有极低的线膨胀系数,近年来被广泛应用于倍容量导线(铝包殷钢芯超耐热铝合金绞线)的芯材。目前输电导线用殷钢丝材的加工,均为冷拔加工工艺,为了降低拉拔力、改善丝材表面质量,拉拔过程中需使用皮膜剂和拉拔润滑粉,拉拔后丝材表面残留的皮膜剂、拉拔粉等,均会影响下一步的包铝工艺,需要通过酸洗、剥皮或者打磨等工艺去除,导致生产周期延长、生产成本增加,同时也会对环境造成一定的污染。
在专利《一种高强度因瓦合金及其合金线材的生产方法》(专利号ZL200510029930.0)中,使用了冶炼、锻造、轧制、冷拔、热处理、二次冷拔的工艺,全过程无氧化皮去除工艺,且最后一道工序为冷拔,丝材表面会残留皮膜剂、拉拔粉以及拉拔形成的氧化层等,在进行下一步包铝加工时需要进行酸洗或者剥皮、打磨处理。
在专利《一种高强度低膨胀系数合金线材及其制造方法》(专利号ZL201110201300.2)中,使用了冶炼、锻造、轧制、冷拔、酸洗+剥皮、热处理、二次冷拔的工艺,虽然在第一次冷拔后进行了酸洗+剥皮工艺,去除了丝材的表面氧化皮和残留物,但经过二次冷拔工艺后,仍会在表面残留皮膜剂、拉拔粉,在进行下一步包铝加工时需要进行酸洗或者打磨处理。
在专利申请《一种架空导线用合金材料及其生产方法》(申请号201911275204.5)、《一种架空导线用铝包镍钼合金钢线及其生产方法》(申请号201910552315 .X)、《一种架空导线用合金钢、合金钢生产方法及架空导线》(申请号201810343144 .5)以及《架空导线用合金钢芯线及其生产方法》(申请号 201911190132.4)中,均采取真空冶炼、电渣精炼、锻造、轧制、固溶处理、冷拔、热处理、二次冷拔的工艺,此工艺下殷钢的冶金质量有所提升,但在冷拔加工过程中亦未采取剥皮处理等表面控制工艺,同时最后一道工序为冷拔,仍会在表面残留皮膜剂、拉拔粉,在进行下一步包铝加工时需要进行酸洗或者打磨处理。
发明内容
为解决上述技术问题,本发明提供一种高表面质量殷钢丝材的生产方法。本发明采取的技术方案是:
一种高表面质量殷钢丝材生产方法包括真空熔炼、电渣重熔、锻造成坯、轧制、冷拔、时效热处理工序;
所述轧制工序,包括高温初轧、高温补温、吐丝水冷步骤;所述高温补温步骤补温至1100~1200℃,补温时间0.5~2h;
所述冷拔工序,在拉拔至倒数第二道次前或者拉拔至D>d+0.8mm时进行剥皮和双砂带打磨处理,之后继续拉拔;其中D为拉拔过程中丝材的mm直径,d为成品丝材的mm直径;
所述时效热处理工序,采用保护气氛进行退火处理,退火温度500~750℃。
所述轧制工序,高温初轧前控制坯料的加热温度为1150~1250℃,保温时间2~4h;吐丝温度950~1050℃,吐丝后立即水冷。
所述冷拔工序,最后一道次拉拔无减面率要求,其他道次减面率应满足:当D>6.50mm时,单道次减面率为25~30%;当4.00≤D≤6.50mm时,单道次减面率为20~25%;当D<4.00mm时,单道次减面率为12~20%。
所述冷拔工序,剥皮过程总去除尺寸≤0.3mm;双砂带打磨过程打磨去除总量h与砂带机前、后砂带的规格满足:当h<0.15mm时,前、后砂带均为400目;当0.15≤h≤0.20mm时,前、后砂带分别为320目、400目;当h>0.20mm时,前、后砂带分别为180目、320目。
所述冷拔工序,采用单罐拉拔,拉拔过程使用在线式皮膜机包覆皮膜剂。
所述时效热处理工序,保护气氛为氢气和氮气,二者的流量比值为氢气:氮气≥4:1。
上述方法适用于生产直径3.0~6.5mm的殷钢丝材。
上述方法所生产的殷钢丝材抗拉强度≥1100MPa,250mm标距断后延伸率≥5%。
采用上述技术方案的有益效果在于:
(1)使用真空冶炼+电渣精炼工艺,保障殷钢的冶金质量,避免丝材拉拔过程中,因组织成分原因出现断丝、表面应力裂纹等缺陷。
(2)采用高温初轧+高温补温+吐丝水冷的轧制工艺,使殷钢在轧制过程中始终处于固溶处理温度范围内,且通过吐丝水冷形成固溶处理后的水冷效果,从而在轧制过程中完成盘条固溶处理。本工艺既缩短了整体生产流程,降低了生产成本、缩短了加工周期;同时又可避免盘条在后续二次加热形成厚重氧化皮,提高了整体成材率。
(3)冷拔工序采用的剥皮+双砂带打磨方法,可去除化学稳定性强、难以用酸洗方法去除的殷钢氧化皮;且放在拉拔中间道次进行剥皮,既可使剥皮厚度降到最低,同时后续的拉拔也可矫正剥皮后的丝材椭圆度偏差。同时,剥皮+双砂带打磨处理后,一般再经过两道次即可完成最终拉拔工艺,可减少丝材表面的残留物数量。减面率的配制,可以保障丝材良好的力学性能,且减少表面应力裂纹的产生。
(4)采用冷拔+时效退火工艺,区别于常规的冷拔+热处理+二次冷拔工艺,丝材最后的工艺为退火工艺,使用氢氮还原气氛,可对丝材表面起到光亮退火的作用,进一步降低表面的残留,得到高表面质量的殷钢丝材。
本发明适用于生产直径3.0~6.5mm殷钢丝材,所生产的丝材表面光亮,无氧化皮、划痕,无拉拔粉残留,丝材力学性能良好,丝材抗拉强度≥1100MPa,250mm标距断后延伸率≥5%。
附图说明
图1为实施例1生产的殷钢丝材与其他工艺生产的殷钢丝材对比图;
图2为实施例2生产的殷钢丝材与其他工艺生产的殷钢丝材对比图;
图3为实施例3生产的殷钢丝材与其他工艺生产的殷钢丝材对比图;
图4为实施例1生产的殷钢丝材的表面形貌图;
图5为其他工艺生产的殷钢丝材的表面形貌图。
具体实施方式
本发明高表面质量殷钢丝材的生产方法适用于生产直径3.0~6.5mm的殷钢丝材,包括真空熔炼、电渣重熔、锻造成坯、轧制、冷拔、时效热处理工序,具体工艺步骤如下所述:
(1)轧制工序:包括高温初轧、高温补温、吐丝水冷步骤。高温初轧前控制坯料的加热温度为1150~1250℃,保温时间2~4h;高温补温步骤补温至1100~1200℃,补温时间0.5~2h;吐丝温度950~1050℃,吐丝后立即水冷。
(2)冷拔工序:采用单罐拉拔,拉拔过程使用在线式皮膜机包覆皮膜剂。在拉拔至倒数第二道次前或者拉拔至D>d+0.8mm时进行剥皮和双砂带打磨处理,之后继续拉拔;其中D为拉拔过程中丝材的mm直径,d为成品丝材的mm直径;
拉拔过程的道次减面率,最后一道次拉拔无减面率要求,其他道次减面率按如下控制:当D>6.50mm时,单道次减面率为25~30%;当4.00≤D≤6.50mm时,单道次减面率为20~25%;当D<4.00mm时,单道次减面率为12~20%;
剥皮过程总去除量≤0.3mm;双砂带打磨过程打磨去除总量h与砂带机前、后砂带的规格满足:当h<0.15mm时,前、后砂带均为400目;当0.15≤h≤0.20mm时,前、后砂带分别为320目、400目;当h>0.20mm时,前、后砂带分别为180目、320目。
(3)时效热处理工序:采用保护气氛进行退火处理,退火温度500~750℃,保护气氛为流量比值≥4:1的氢气、氮气混合气。
上述方法所生产的殷钢丝材抗拉强度≥1100MPa,250mm标距断后延伸率≥5%。
本发明实施例1-6轧制工序控制参数见表1,冷拔工序各道次拉拔配模及减面率见表2、3,冷拔、时效热处理工序控制参数见表4;所生产的殷钢丝材的力学性能见表5。
表1. 轧制工序控制参数
表2. 冷拔工序各道次拉拔配模及减面率(一)
表3. 冷拔工序各道次拉拔配模及减面率(二)
表4. 冷拔、时效热处理工序控制参数
表5. 殷钢丝材的力学性能
由图1-3可知,本发明所生产的殷钢丝材表面光亮,无划痕、无氧化皮;由图4、5对比可知,本发明所生产的殷钢丝材表面无拉拔粉残留。

Claims (8)

1.一种高表面质量殷钢丝材的生产方法,其特征在于,包括真空熔炼、电渣重熔、锻造成坯、轧制、冷拔、时效热处理工序;
所述轧制工序,包括高温初轧、高温补温、吐丝水冷步骤;所述高温补温步骤补温至1100~1200℃,补温时间0.5~2h;
所述冷拔工序,在拉拔至倒数第二道次前或者拉拔至D>d+0.8mm时进行剥皮和双砂带打磨处理,之后继续拉拔;其中D为拉拔过程中丝材的mm直径,d为成品丝材的mm直径;最后一道次拉拔无减面率要求,其他道次减面率应满足:
当D>6.50mm时,单道次减面率为25~30%;
当4.00≤D≤6.50mm时,单道次减面率为20~25%;
当D<4.00mm时,单道次减面率为12~20%;
所述时效热处理工序,采用保护气氛进行退火处理,退火温度500~750℃;
所述殷钢丝材抗拉强度≥1100MPa,250mm标距断后延伸率≥5%。
2.根据权利要求1所述的高表面质量殷钢丝材的生产方法,其特征在于,所述轧制工序,高温初轧前控制坯料的加热温度为1150~1250℃,保温时间2~4h。
3.根据权利要求2所述的高表面质量殷钢丝材的生产方法,其特征在于,所述轧制工序,吐丝温度950~1050℃,吐丝后立即水冷。
4.根据权利要求3所述的高表面质量殷钢丝材的生产方法,其特征在于,所述冷拔工序,剥皮过程总去除尺寸≤0.3mm。
5.根据权利要求4所述的高表面质量殷钢丝材的生产方法,其特征在于,所述冷拔工序,双砂带打磨过程打磨去除总量h与砂带机前、后砂带的规格满足:当h<0.15mm时,前、后砂带均为400目;
当0.15≤h≤0.20mm时,前、后砂带分别为320目、400目;
当h>0.20mm时,前、后砂带分别为180目、320目。
6.根据权利要求5所述的高表面质量殷钢丝材的生产方法,其特征在于,所述冷拔工序,采用单罐拉拔,拉拔过程使用在线式皮膜机包覆皮膜剂。
7.根据权利要求6所述的高表面质量殷钢丝材的生产方法,其特征在于,所述时效热处理工序,保护气氛为氢气和氮气,二者的流量比值为氢气:氮气≥4:1。
8.根据权利要求1-7任一项所述的高表面质量殷钢丝材的生产方法,其特征在于,其适用于生产直径3.0~6.5mm的殷钢丝材。
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