CN116287950A - 一种高性价比低合金高强焊丝钢盘条及其生产方法 - Google Patents
一种高性价比低合金高强焊丝钢盘条及其生产方法 Download PDFInfo
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- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 15
- 229910052796 boron Inorganic materials 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 40
- 239000002893 slag Substances 0.000 claims description 35
- 238000010079 rubber tapping Methods 0.000 claims description 22
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- 239000000463 material Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 8
- 239000010436 fluorite Substances 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 238000009628 steelmaking Methods 0.000 claims description 8
- 239000005997 Calcium carbide Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 7
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 claims description 6
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- 238000009749 continuous casting Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 claims description 6
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- 238000002791 soaking Methods 0.000 claims description 6
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 4
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims description 4
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- 239000011575 calcium Substances 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims description 4
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- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims description 3
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- 239000003245 coal Substances 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
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- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 1
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Abstract
本发明提供了一种高性价比低合金高强焊丝钢盘条及其生产方法,化学成分以重量百分比计为:C:0.05‑0.10%,Si:0.50‑0.90%,Mn:1.40‑1.80%,P≤0.015%,S≤0.015%,Cr:0.30‑0.60%,V:0.03‑0.08%,Cu≤0.15%,Ni≤0.10%,Ti:0.08‑0.15%,B:0.002‑0.006%,其余为Fe及不可避免的杂质,本发明使用CrVB成分体系,采用低温轧制和冷却工艺,使其具有适合拉拔的组织F+B,避免了马氏体异常组织的出现,使得盘条的强度降低,面缩和延伸大大提高,本方法采用合理的成分体系及工艺技术,改善了盘条通条性和组织均匀性,实现了用户免退火拉拔加工需求。使用CrVB成分体系,替代Ni/Mo贵重合金,降低成本,相比同级别GB/T 8110‑2008 ER69‑G,成本降低约2200元/吨钢,成本优势明显。
Description
技术领域
本发明属于焊丝钢盘条领域,尤其涉及一种高性价比低合金高强焊丝钢盘条及其生产方法。
背景技术
焊丝钢属于缓冷钢,在焊丝钢的生产过程中极易产生异常组织,如上贝氏体或马氏体。上贝氏体的形态呈羽毛状,是贝氏体转变温度偏高区域的转变产物,上贝氏体的形成温度较高,其中的铁素体条和碳化物粗大,它的塑变抗力低。上贝氏体中的渗碳体呈不连续的短杆状分布在铁素体条之间,铁素体和渗碳体分布有明显的方向性,同时还存在含碳量低,过饱和度小,位错密度低的缺陷,使得铁素体条冲击韧性差,易于引起焊丝钢拉拔脆断。马氏体是碳溶于α-Fe的过饱和的固溶体,是奥氏体通过无扩散型相变转变成的亚稳定相,其比容大于奥氏体、珠光体等组织,尽管具有高的强度和硬度,但是马氏体的脆性很高,容易导致焊丝钢拉拔脆断。
随着高端制造业、工程机械、煤矿机械及桥梁等行业的快速发展,高强焊丝钢市场需求量也在逐年增加, 70kg级高强焊丝钢主要应用于煤矿机械Q690钢配套实心焊丝,该系列钢种通过加入不同含量的Ni、Mo、Cr、Ti等合金元素以提高焊缝熔敷金属的强韧性能,但是贵重合金含量较高,成本高。
发明内容
针对上述技术问题,本发明提供一种高性价比低合金高强焊丝钢盘条及其生产方法,采用CrVB成分体系,其化学成分以重量百分比计为:C:0.05-0.10%,Si:0.50-0.90%,Mn:1.40-1.80%,P≤0.015%,S≤0.015%,Cr:0.30-0.60%,V: 0.03-0.08%,Cu≤0.15%,Ni≤0.10%,Ti:0.08-0.15%,B:0.002-0.006%,其余为Fe及不可避免的杂质,本发明使用CrVB成分体系,采用低温轧制和冷却工艺,生产得到的钢盘条具有适合拉拔的组织F+B,通过减少马氏体异常组织的出现,使得盘条的强度降低,面缩和延伸大大提高,本方法采用合理的成分体系及工艺技术,也改善了盘条通条性和组织均匀性,满足了用户免退火拉拔加工需求。
本发明是通过以下技术手段实现上述技术目的的。
一种高性价比低合金高强焊丝钢盘条的生产方法,包括以下步骤:
步骤S1:炼钢:转炉冶炼脱氧合金化,炼钢出钢成分控制要求:C≤0.04%,P≤0.010%,出钢温度≥1580℃;出钢时进行脱氧合金化;
步骤S2:精炼:LF精炼炉进站之后补加造渣料,白渣后选用低碳铬铁、电解镍、钒铁合金调整成分,重量百分比为Cr:0.35-0.40%、Ni:0.06-0.10%、V:0.030-0.060%;软吹氩前一次性喂入钛铁线;调整Ti重量百分比:0.08-0.10%,后喂入硼铁线,调整硼B重量百比为:0.0028-0.0032%,LF出站后,对钢液进行软吹氩气;
步骤S3:小方坯浇注:钢水上连铸机进行浇注,目标过热度为20~30℃,拉速控制在2.2~2.4m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300~400A、频率3~4Hz,末端电磁搅拌参数为电流强度250~300A、频率8~10Hz,二冷比水流量0.8-1.0L/kg,浇注过程全程保护浇注的过热度为20-30℃;
步骤S4:控轧控冷和线材轧制:加热炉均热段温度范围为1030~1160℃,轧制开轧温度为960~1000℃,终轧温度为850~870℃,吐丝温度为820~850℃,出保温罩温度为460~570℃,集卷温度为320~400℃,小方坯浇注的末端电磁搅拌参数为:电流强度250~300A、频率8~10Hz,得到盘条;
步骤S5:对所述盘条检验、打包入库。
上述方案中,所述步骤S1中炼钢出钢成分控制要求:C:0.024%,P:0.012%,出钢温度:1582℃;出钢时进行脱氧合金化,加入合金的顺序及重量为:出钢1/4后加入21kg/t的高硅硅锰和1.2kg/t的硅铁进行合金化;加完合金后依次加入8.0kg/t的石灰和1.8kg/t的萤石造渣料,形成精炼初渣。
上述方案中,所述步骤S2中LF精炼炉进站之后补加造渣料,所述造渣料的组分为石灰1kg/t、0kg/t萤石,使炉渣碱度R为2.5;精炼过程采用电石、硅铁粉重量百分比为按照1:4进行扩散脱氧,将其分少量多次加在渣面上,总加入量为2.1kg/t;少量多批次,白渣时间17min。
上述方案中,所述步骤S2中成分控制重量百分比为Cr:0.35%、Ni:0.07%、V:0.038%;软吹氩前一次性喂入钛铁线;调整Ti重量百分比:0.09%,后喂入硼铁线,调整B重量百比为: 0.0031%,不得钙处理。
上述方案中,所述步骤S2精炼中LF出站后,对钢液进行软吹氩气,氩气流量20NL/min,软吹时间15分钟。
上述方案中,所述步骤S3的小方坯浇注的具体步骤包括:钢水上连铸机进行浇注,开浇前对中间包冲击区及各个流次间进行氩气吹扫,然后启动钢包滑板开浇,目标过热度为25℃,拉速控制在2.2m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300A、频率4Hz,末端电磁搅拌参数为电流强度250A、频率10Hz,二冷比水流量0.8L/kg。
上述方案中,所述步骤S4控轧控冷和线材轧制的具体操作包括:加热炉均热段温度范围为1060℃,轧制开轧温度为980℃,终轧温度为860℃,吐丝温度为820℃,出保温罩温度为500℃,集卷温度为380℃。
一种高性价比低合金高强焊丝钢盘条,使用所述的高性价比低合金高强焊丝钢盘条的生产方法进行生产,其化学成分以重量百分比计为:C:0.05-0.10%,Si:0.50-0.90%,Mn:1.40-1.80%,P≤0.015%,S≤0.015%,Cr:0.30-0.60%,V:0.03-0.08%,Cu≤0.15%,Ni≤0.10%,Ti:0.08-0.15%,B:0.002-0.006%,其余为Fe及不可避免的杂质。
上述方案中,其化学成分以重量百分比计为:C:0.05%,Si:0.67%,Mn:1.48%,P:0.015%,S:0.008%,Cr:0.34%,V:0.038%,Cu:0.02%,Ni:0.07%,Ti:0.08%,B:0.0030%,其余为Fe及不可避免的杂质。
与现有技术相比,本发明的有益效果是:
本发明的高性价比低合金高强焊丝钢盘条化学成分以重量百分比计为:C:0.05-0.10%,Si:0.50-0.90%,Mn:1.40-1.80%,P≤0.015%,S≤0.015%,Cr:0.30-0.60%,V: 0.03-0.08%,Cu≤0.15%,Ni≤0.10%,Ti:0.08-0.15%,B:0.002-0.006%,其余为Fe及不可避免的杂质,该钢盘条钢坯中心偏析≤1.5级、缩孔≤1.0级,使用CrVB成分体系,采用低温轧制和冷却工艺,使得钢盘条具有适合拉拔的组织F+B,通过避免马氏体异常组织的出现,使得盘条的强度降低,面缩和延伸大大提高,也改善了盘条通条性和组织均匀性,满足了用户免退火拉拔加工需求。本发明使用CrVB成分体系,替代Ni/Mo贵重合金,相比同级别GB/T 8110-2008 ER69-G,显著降低了成本。
附图说明
图1是本发明一实施例1的盘条力学性能检测结果示意图。
图2是本发明一实施例1的金相组织示意图。
图3是本发明一对比例的金相组织示意图。
具体实施方式
下面详细描述本发明的实施例,旨在用于解释本发明,而不能理解为对本发明的限制。
一种高性价比低合金高强焊丝钢盘条的生产方法,包括以下步骤:
步骤S1:炼钢;具体为:
转炉冶炼脱氧合金化:出钢成分控制要求:C≤0.04%,P≤0.010%,出钢温度≥1580℃;出钢时进行脱氧合金化,加入合金的顺序及重量为:出钢1/4后加入21-23kg/t的高硅硅锰和1.0-1.5kg/t的硅铁进行合金化;加完合金后依次加入8.0-9.0kg/t的石灰和1.8-2.2kg/t的萤石造渣料,形成精炼初渣;
步骤S2:精炼;具体为:
1)LF精炼炉进站之后补加造渣料,所述造渣料的组分为石灰0-4kg/t、0-2kg/t萤石,使炉渣具有良好的流动性以及碱度R为1.8-3.0;精炼过程采用电石、硅铁粉重量百分
比为按照1:4进行扩散脱氧,将其分少量多次加在渣面上,总加入量为1.9-2.3kg/t;少量多批次,白渣时间≥15min;
2)成分控制:白渣后,根据钢水过程样成分,选用低碳铬铁、电解镍、钒铁合金调整成分重量百分比Cr:0.35-0.40%、Ni:0.06-0.10%、V:0.030-0.060%;软吹氩前一次性喂入钛铁线,调整Ti重量百分比至:0.08-0.10%,后喂入硼铁线,调整B重量百分比至:0.0028-0.0032%,不得钙处理。采用V、B、Ti微合金化,进行细晶化,使焊缝金属获得均匀、细小的针状铁素体组织,从而实现焊缝金属的强韧化;
3)LF出站后,对钢液进行软吹氩气,氩气流量10-40NL/min,软吹时间≥10分钟;
步骤S3:小方坯浇注;具体为:
钢水上连铸机进行浇注,开浇前对中间包冲击区及各个流次间进行氩气吹扫,然后启动钢包滑板开浇,目标过热度为20~30℃,拉速控制在2.2~2.4m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300~400A、频率3~4Hz,末端电磁搅拌参数为电流强度250~300A、频率8~10Hz,二冷比水流量0.8-1.0L/kg,浇注过程全程保护浇注;上述步骤可以有效改善铸坯内部质量,降低夹杂物和偏析程度;
步骤S4:控轧控冷和线材轧制,得到盘条;
具体为:加热炉均热段温度范围为1030~1160℃,轧制开轧温度为960~1000℃,终轧温度为850~870℃,吐丝温度为820~850℃,出保温罩温度为460~570℃,集卷温度为320~400℃。在轧制过程中通过降低吐丝温度、辊道速度及保温罩开启,来调节轧制冷却速度,使组织在保温罩内发生充分相变,解决高强焊丝钢的强度偏高、异常组织的问题;
步骤S5、对所述盘条检验、打包入库。
实施例1
一种高性价比低合金高强焊丝钢盘条,其化学成分以重量百分比计为:C:0.05%,Si:0.67%,Mn:1.48%,P:0.015%,S:0.008%,Cr:0.34%,V:0.038%,Cu:0.02%,Ni:0.07%,Ti:0.08%,B:0.0030%,其余为Fe及不可避免的杂质。
一种高性价比低合金高强焊丝钢盘条的生产方法,包括以下步骤:
步骤S1:炼钢;根据本实施例,优选的,转炉冶炼脱氧合金化:出钢成分控制要求:C:0.024%,P:0.012%,出钢温度:1582℃;出钢时进行脱氧合金化,加入合金的顺序及重量为:出钢1/4后加入21kg/t的高硅硅锰和1.2kg/t的硅铁进行合金化;加完合金后依次加入8.0kg/t的石灰和1.8kg/t的萤石造渣料,形成精炼初渣;
步骤S2:精炼;根据本实施例,优选的:
1)LF精炼炉进站之后补加造渣料,所述造渣料的组分为石灰1kg/t、0kg/t萤石,使炉渣具有良好的流动性以及碱度R为2.5;精炼过程采用电石、硅铁粉重量百分比为按照1:4进行扩散脱氧,将其分少量多次加在渣面上,总加入量为2.1kg/t;少量多批次,白渣时间:17min;
2)成分控制:白渣后,根据钢水过程样成分,选用低碳铬铁、电解镍、钒铁合金调整成分重量百分比至Cr:0.35%、Ni:0.07%、V:0.038%;软吹氩前一次性喂入钛铁线调整Ti重量百分比至:0.09%,后喂入硼铁线调整B重量百分比至:0.0031%,不得钙处理;
3)LF出站后,对钢液进行软吹氩气,氩气流量20NL/min,软吹时间:15分钟;
步骤S3:小方坯浇注;根据本实施例,优选的,钢水上连铸机进行浇注,开浇前对中间包冲击区及各个流次间进行氩气吹扫,然后启动钢包滑板开浇,目标过热度为25℃,拉速控制在2.2m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300A、频率4Hz,末端电磁搅拌参数为电流强度250A、频率10Hz,二冷比水流量0.8L/kg,浇注过程全程保护浇注。上述参数可以有效改善铸坯内部质量,降低夹杂物和偏析程度;
步骤S4:控轧控冷和线材轧制,得到盘条;根据本实施例,优选的,轧制过程中均热段温度范围1060℃,轧制开轧温度为980℃,终轧温度为860℃,吐丝温度为820℃,出保温罩温度为500℃,集卷温度为380℃。在轧制过程中通过降低吐丝温度、辊道速度及保温罩开启,来调节轧制冷却速度,使组织在保温罩内发生充分相变,解决高强焊丝钢的强度偏高、异常组织的问题;
步骤S5、对所述盘条检验、打包入库。
对比例
对比例与实施例1的区别在于合金体系不同,对比例采用NiMo合金系,其中Mo:0.35%、钼铁加入量为5.9kg/t;Ni:0.60%、电解镍加入量为6.4kg/t。
如图1所示,通过上述方法生产的高性价比低合金高强焊丝钢盘条,力学性能稳定,分别取实施例1和对比例中的一件盘条头尾各剪8个样,共计16样品进行检测,结合表1所示,本申请实施例1的抗拉伸强度519-597Mpa,抗拉强度极差78Mpa,断后伸长率28-30%、断面收缩率78-82%,可见本申请实施例1的抗拉伸强度≤650Mpa,抗拉强度极差≤80Mpa,断后伸长率≥28%、断面收缩率≥78%,可以实现用户盘条免退火拉拔至φ1.2mm气保实心焊丝,过程顺畅、无断丝。而对比例中抗拉伸强度685-779Mpa,抗拉强度极差为94Mpa,断后伸长率为21-24%、断面收缩率为59-68%,可见对比例的抗拉伸强度>650Mpa,抗拉强度极差>80Mpa,断后伸长率<28%、断面收缩率<78%,通过对比可知对比例盘条通条性能波动较大,强度较高,断后伸长率和延伸率偏低,不利于用户拉拔加工。
表1 实施例1与对比例的力学性能对比
项目 | 抗拉强度/Mpa | 抗拉强度极差/Mpa | 断后伸长率/% | 断面收缩率/% |
实施例1 | 519-597 | 78 | 28-30 | 78-82 |
对比例 | 685-779 | 94 | 21-24 | 59-68 |
如图2和图3所示,在放大倍数为500倍的情况下,通过上述方法生产的高性价比低合金高强焊丝钢盘条,组织为F+少量B,组织整体均匀性好,心部与边部晶粒无明显区别。而对比例盘条组织为F+B+少量M、组织整体均匀性较差,心部晶粒明显比边部粗大。
综上所述,本发明提供了一种高性价比低合金高强焊丝钢盘条的生产方法,使用CrVB成分体系,采用低温轧制和冷却工艺,使其具有适合拉拔的组织F+B,避免了马氏体异常组织的出现,使得盘条的强度降低,面缩和延伸大大提高,本方法采用合理的成分体系及工艺技术,改善了盘条通条性和组织均匀性,满足了用户免退火拉拔加工需求。本发明还使用CrVB成分体系,替代Ni/Mo贵重合金,相比同级别GB/T 8110-2008 ER69-G,成本降低约2200元/吨钢,成本优势明显,大大降低了成本。
应当理解,虽然本说明书是按照各个实施例描述的,但并非每个实施例仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
上文所列出的一系列的详细说明仅仅是针对本发明的可行性实施例的具体说明,它们并非用以限制本发明的保护范围,凡未脱离本发明技艺精神所作的等效实施例或变更均应包含在本发明的保护范围之内。。
Claims (9)
1.一种高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,包括以下步骤:
步骤S1:炼钢:转炉冶炼脱氧合金化,炼钢出钢成分控制要求:C≤0.04%,P≤0.010%,出钢温度≥1580℃;出钢时进行脱氧合金化;
步骤S2:精炼:LF精炼炉进站之后补加造渣料,白渣后选用低碳铬铁、电解镍、钒铁合金调整成分,重量百分比为Cr:0.35-0.40%、Ni:0.06-0.10%、V:0.030-0.060%;软吹氩前一次性喂入钛铁线;调整Ti重量百分比:0.08-0.10%,后喂入硼铁线,调整硼B重量百比为:0.0028-0.0032%,LF出站后,对钢液进行软吹氩气;
步骤S3:小方坯浇注:钢水上连铸机进行浇注,目标过热度为20~30℃,拉速控制在2.2~2.4m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300~400A、频率3~4Hz,末端电磁搅拌参数为电流强度250~300A、频率8~10Hz,二冷比水流量0.8-1.0L/kg,浇注过程全程保护浇注的过热度为20-30℃;
步骤S4:控轧控冷和线材轧制:加热炉均热段温度范围为1030~1160℃,轧制开轧温度为960~1000℃,终轧温度为850~870℃,吐丝温度为820~850℃,出保温罩温度为460~570℃,集卷温度为320~400℃,小方坯浇注的末端电磁搅拌参数为:电流强度250~300A、频率8~10Hz,得到盘条;
步骤S5:对所述盘条检验、打包入库。
2.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S1中炼钢出钢成分控制要求:C:0.024%,P:0.012%,出钢温度:1582℃;出钢时进行脱氧合金化,加入合金的顺序及重量为:出钢1/4后加入21kg/t的高硅硅锰和1.2kg/t的硅铁进行合金化;加完合金后依次加入8.0kg/t的石灰和1.8kg/t的萤石造渣料,形成精炼初渣。
3.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S2中LF精炼炉进站之后补加造渣料,所述造渣料的组分为石灰1kg/t、0kg/t萤石,使炉渣碱度R为2.5;精炼过程采用电石、硅铁粉重量百分比为按照1:4进行扩散脱氧,将其分少量多次加在渣面上,总加入量为2.1kg/t;少量多批次,白渣时间17min。
4.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S2中成分控制重量百分比为Cr:0.35%、Ni:0.07%、V:0.038%;软吹氩前一次性喂入钛铁线;调整Ti重量百分比:0.09%,后喂入硼铁线,调整B重量百比为: 0.0031%,不得钙处理。
5.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S2精炼中LF出站后,对钢液进行软吹氩气,氩气流量20NL/min,软吹时间15分钟。
6.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S3的小方坯浇注的具体步骤包括:钢水上连铸机进行浇注,开浇前对中间包冲击区及各个流次间进行氩气吹扫,然后启动钢包滑板开浇,目标过热度为25℃,拉速控制在2.2m/min,结晶器水流量为1850L/min,结晶器电磁搅拌参数为电流强度300A、频率4Hz,末端电磁搅拌参数为电流强度250A、频率10Hz,二冷比水流量0.8L/kg。
7.根据权利要求1所述的高性价比低合金高强焊丝钢盘条的生产方法,其特征在于,所述步骤S4控轧控冷和线材轧制的具体操作包括:加热炉均热段温度范围为1060℃,轧制开轧温度为980℃,终轧温度为860℃,吐丝温度为820℃,出保温罩温度为500℃,集卷温度为380℃。
8.一种高性价比低合金高强焊丝钢盘条,其特征在于,使用权利要求1-7任意一项所述的低合金高强焊丝钢盘条的生产方法进行生产,其化学成分以重量百分比计为:
C:0.05-0.10%,Si:0.50-0.90%,Mn:1.40-1.80%,P≤0.015%,S≤0.015%,Cr:0.30-0.60%,V:0.03-0.08%,Cu≤0.15%,Ni≤0.10%,Ti:0.08-0.15%,B:0.002-0.006%,其余为Fe及不可避免的杂质。
9.根据权利要求8所述的高性价比低合金高强焊丝钢盘条,其特征在于,其化学成分以重量百分比计为:C:0.05%,Si:0.67%,Mn:1.48%,P:0.015%,S:0.008%,Cr:0.34%,V:0.038%,Cu:0.02%,Ni:0.07%,Ti:0.08%,B:0.0030%,其余为Fe及不可避免的杂质。
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