CN116103571A - 一种薄规格高强塑积热轧酸洗钢带及其生产方法 - Google Patents
一种薄规格高强塑积热轧酸洗钢带及其生产方法 Download PDFInfo
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Abstract
本发明公开了一种薄规格高强塑积热轧酸洗钢带及其生产方法,钢带化学成分组成及质量百分含量为:C:0.080~0.10%,Si:0.20~0.30%,Mn:1.20~1.50%,P:0.015~0.025%,S≤0.008%,Als:0.025~0.055%,Nb:0.03~0.05%,Ti:0.06~0.08%,其余为Fe和不可避免的杂质。生产方法包括炼钢、连铸、热连轧和酸洗等工序;本发明采用低碳、低磷、低锰及铌钛复合设计的化学成分体系,充分发挥第二相粒子的细晶强化及析出强化作用,最终实现良好的力学性能:屈服强度≥600MPa,抗拉强度≥700MPa,断后伸长率A50≥25%,强塑积≥18GPa%,成型性能良好,广泛应用于汽车结构加强件等相关领域。
Description
技术领域
本发明属于冶金技术领域,具体涉及一种薄规格高强塑积热轧酸洗钢带及其生产方法。
背景技术
近年来,随着环保要求不断提升,薄规格高强塑积的热轧酸洗高强汽车钢用量不断增加,其优势有:一是降低使用钢板厚度有利于汽车轻量化,降低能耗;二是高强塑积在保证强度的同时能更好的加工成型,提高成材率;三是酸洗后钢带表面质量较高,尺寸精度控制较好;四是部分薄规格可实现以热代冷,与冷轧板相比售价较低,市场竞争优势明显。
目前,薄规格的高强塑积热轧酸洗钢带主要是通过添加Mo等贵合金元素或通过相变强化来实现。
专利号为CN112708824A公开了公开了热轧薄规格吉帕级高强钢的生产方法。其包括炼钢、连铸、板坯加热、控制轧制、控制冷却工序,所述铸坯成分的重量百分含量为:C0.14%~0.22%,Si 0.50%~1.40%,Mn 1.00%~1.80%,P<0.02%,S<0.01%,Als0.020%~0.050%,Nb 0.020%~0.04%;其他为Fe和不可避免的微量杂质。该专利成分设计C、Mn含量偏高,导致碳当量高,不利于焊接加工成型。
专利号为CN109536846A公开了屈服强度700MPa级高韧性热轧钢板及其制造方法,解决现有屈服强度700MPa级热轧钢板的韧性低、制造成本高的技术问题。本发明提供的屈服强度700MPa级高韧性热轧钢板,其化学成分重量百分比为:C:0.06~0.10%,Si≤0.10%,Mn:1.20~1.80%,P≤0.012%,S≤0.006%,N≤0.0040%,Al:0.015~0.040%,Mo:0.10~0.30%,Ti:0.06~0.12%,余量为铁和不可避免夹杂。该专利成分设计添加了Mo合金元素,生产成本高。
专利号为CN110484827A公开了一种抗拉强度600MPa级低屈强比热轧酸洗钢板,其化学成分重量百分比为:C:0.06~0.08%,Mn:0.8~1.2%,Si:0~0.10%,P:0~0.020%,S:0~0.006%,Alt:0.015~0.050%,N:0~0.005%,Ti:0.03~0.05%,余量为Fe及不可避免的杂质元素。该专利屈服强度仅420~520MPa,抗拉强度仅600~660MPa,整体强度偏低。
专利号为CN111074165A公开一种700MPa级高强汽车钢热轧酸洗板及其生产方法,其成分按重量百分比计包括:C:0.05~0.1%、Si≤0.08%、Mn:1.70~1.90%、P≤0.020%、S≤0.010%、Nb:0.03~0.05%、Ti:0.07~0.09%、V:0.01~0.03%,其余为铁和不可避免的杂质。该专利V、Ti合金设计含量高,生产成本高,且未提及酸洗平整工艺。
专利号为CN112680655A公开了屈服强度700MPa级低合金高强冷轧钢板及制备方法,所述钢板化学成分重量百分含量为:C:0.06~0.1%、Si:0.2~0.6%、Mn:1.0~1.5%、P≤0.015%、S≤0.008%、Als:0.03~0.06%、Nb:0.02~0.05%、Ti:0.07~0.11%、N≤0.005%,其余为Fe及不可避免杂质,通过低碳及Nb、Ti微合金化的成分设计,匹配合理的轧制及连续退火工艺设计,获得组织均匀、机械性能稳定及冷成型性能良好的冷轧低合金高强钢,可以广泛适应汽车工业轻量化的发展需求。该专利通过冷轧退火工艺实现,生产流程长成本高。
专利号为CN113025893A公开一种850MPa热轧酸洗高强钢,所述钢的化学成分为:C:0.03~0.08%、Si:0.05~0.12%、Mn:1.0~2.0%、P≤0.02%、S≤0.009%、Als:0.03~0.04%、Ti:0.05~0.15%、Mo:0.15~0.3%、Nb≤0.10%,其余为Fe及不可避免杂质。该专利Mo合金含量成本较高,且成品延伸率指标偏低,不利于成型。
发明内容
本发明的目的在于提供一种薄规格高强塑积热轧酸洗钢带及其生产方法。
本发明解决其技术问题所采用的技术方案是:一种薄规格高强塑积热轧酸洗钢带,其化学成分组成及质量百分含量为:C:0.080~0.10%,Si:0.20~0.30%,Mn:1.20~1.50%,P:0.015~0.025%,S≤0.008%,Als:0.025~0.055%,Nb:0.03~0.05%,Ti:0.06~0.08%,其余为Fe和不可避免的杂质。
具体的是,所述钢带厚度为1.8~8.0mm,宽度为1000~1650mm。
具体的是,所述钢带力学性能:屈服强度≥600MPa,抗拉强度≥700MPa,断后伸长率A50≥25%,强塑积≥18GPa%。
一种薄规格高强塑积热轧酸洗钢带的生产方法,包括连铸工序、热连轧工序和酸洗工序;
所述连铸工序,板坯厚度为230mm;
热连轧工序,板坯均热段温度为1200~1260℃,出炉温度为1250±20℃,加热时间为180~260min;中间坯厚度为30~60mm;粗轧出口温度为1060~1100℃,精轧入口温度为1030±20℃;精轧出口温度:1.8≤H≤4.0mm为890±15℃,4.0<H≤8.0mm为880±15℃;卷取温度为550±15℃,H为热轧板的厚度;
酸洗工序,采用推拉式浅槽紊流酸洗+平整工艺,酸洗第一个酸槽的自由酸浓度≥30g/L,最后一个酸槽的自由酸浓度≥150g/L;酸液温度为75~90℃;漂洗水电导率≤50us/cm,漂洗水温度50~80℃;平整延伸率为0.5~3.0%。
具体的是,所述热连轧工序,炉后除鳞箱采用双排除鳞,系统压力≥25MPa;R1与R2机前除鳞箱采用奇数道次除鳞,系统压力≥25MPa;精轧机前除鳞箱采用双排除鳞,系统压力≥25MPa;根据钢带宽度可使用定宽压力机,最大减宽量为220mm;H≤3.0mm的钢带投用保温罩;H≤4.0mm的钢带使用边部加热器,加热温度30~80℃;轧后冷却采用前段层流冷却模式,使用U型冷却策略,头部与尾部各40m的卷取温度比设定值高30℃。
本发明具有以下有益效果:本发明采用低碳、低硅、微磷、低锰及铌钛复合设计的化学成分体系,配置合理的工艺路线设计,通过热轧边部加热器与保温罩的综合使用,可实现薄规格钢带的通板性能与尺寸的均匀性;通过较低的热轧终轧温度与卷取温度控制,充分发挥第二相粒子的细晶强化及析出强化作用,最终实现良好的力学性能;通过热轧后酸轧+平整工艺,可确保良好的表面质量、尺寸精度及板型质量,可实现厚度1.8~8.0mm且强塑积≥18GPa%的热轧酸洗钢带的生产,具有生产流程短、成本低、强韧性高且性能均匀等优点,广泛应用于汽车结构加强件等相关领域。
附图说明
图1为薄规格高强塑积热轧酸洗钢带的金相组织图。
具体实施方式
现在结合附图对本发明作进一步详细的说明。
如图1,一种薄规格高强塑积热轧酸洗钢带,其化学成分组成及质量百分含量为:C:0.080~0.10%,Si:0.20~0.30%,Mn:1.20~1.50%,P:0.015~0.025%,S≤0.008%,Als:0.025~0.055%,Nb:0.03~0.05%,Ti:0.06~0.08%,其余为Fe和不可避免的杂质。
钢带厚度为1.8~8.0mm,宽度为1000~1650mm。
钢带力学性能:屈服强度≥600MPa,抗拉强度≥700MPa,断后伸长率A50≥25%,强塑积≥18GPa%。
一种薄规格高强塑积热轧酸洗钢带的生产方法,所述方法包括炼钢、连铸、热连轧、酸洗等生产工序。
连铸工序,板坯厚度为230mm。
热连轧工序,板坯均热段温度为1200~1260℃,出炉温度为1250±20℃,加热时间为180~260min;中间坯厚度为30~60mm;粗轧出口温度为1060~1100℃,精轧入口温度为1030±20℃;精轧出口温度:1.8≤H≤4.0mm为890±15℃,4.0<H≤8.0mm为880±15℃;卷取温度为550±15℃,H为热轧板的厚度。
热连轧工序,炉后除鳞箱采用双排除鳞,系统压力≥25MPa;R1与R2机前除鳞箱采用奇数道次除鳞,系统压力≥25MPa;精轧机前除鳞箱采用双排除鳞,系统压力≥25MPa;根据钢带宽度可投用定宽压力机,最大减宽量可达220mm;H≤3.0mm的钢带投用保温罩;H≤4.0mm的钢带投用边部加热器,加热温度30~80℃;轧后冷却采用前段层流冷却模式,执行U型冷却策略,头部与尾部各40m的卷取温度比设定值高30℃。
酸洗工序,酸洗第一个酸槽的自由酸浓度≥30g/L,最后一个酸槽的自由酸浓度≥150g/L;酸液温度为75~90℃;漂洗水电导率≤50us/cm,漂洗水温度50~80℃;平整延伸率为0.5~3.0%。
一种薄规格高强塑积热轧酸洗钢带及其生产方法,采用较低C、低Si、低Mn设计,有利于焊接与加工成型,且较低的Si对钢带表面影响较小;采用低P成分设计,具有高的固溶强化效果;采用Nb+Ti复合设计,具有良好的细晶强化与析出强化效果,在确保综合性能的同时避免了贵合金的添加,有利于降低工业化生产成本。
采用较低的热轧终轧温度与卷取温度有利于晶粒细化,且保证了第二相粒子的析出效果,有利于提高钢带的强塑积。
采用合理的粗轧除鳞工艺,以及薄规格的保温罩与边部加热器投用制度,联合精轧后U型冷却策略,确保了热轧钢带表面质量,以及通卷温度与性能的均匀性,有利于通板力学性能的稳定性。
采用推拉式浅槽紊流酸洗+四辊平整工艺,有利于钢带表面氧化铁皮的消除,以及尺寸精度及板型质量的控制。
本发明生产流程较短,表面质量好,尺寸精度高,通卷性能稳定,具有较高的强塑积,在高强度的同时兼具良好的焊接及成型性能,广泛应用于汽车结构加强件等相关领域。
实施例1-3
表1为本发明实施例钢的化学成分(按重量百分比计),余量为Fe及其他不可避免的杂质。
表1本发明实施例钢的化学成分,单位:重量百分比(%)
通过铁水KR脱硫与转炉冶炼,再进行LF与RH精炼后连铸,将连铸板坯经过加热炉加热、粗轧、精轧、冷却、卷取得到热轧卷,热轧工艺参数见表2。
表2本发明实施例钢的热轧工艺参数
对热轧后的热轧钢卷再经过开卷、酸洗、平整、涂油、卷取得到热轧酸洗卷,酸洗工艺参数见表3。
表3本发明实施例钢的酸洗工艺参数
利用上述方法得到的薄规格高强塑积热轧酸洗钢带,按照金属材料拉伸试验方法(GB/T228.1)进行拉伸,其力学性能值见表4。
表4本发明实施例钢的力学性能
屈服强度/MPa | 抗拉强度/MPa | <![CDATA[断后伸长率A<sub>50</sub>/%]]> | 强塑积 | |
本发明 | ≥600 | ≥700 | ≥25 | ≥18 |
实施例1 | 619 | 712 | 28.0 | 19.9 |
实施例2 | 625 | 709 | 26.5 | 18.8 |
实施例3 | 605 | 703 | 29.5 | 20.7 |
本发明不局限于上述实施方式,任何人应得知在本发明的启示下作出的结构变化,凡是与本发明具有相同或相近的技术方案,均落入本发明的保护范围之内。
本发明未详细描述的技术、形状、构造部分均为公知技术。
Claims (5)
1.一种薄规格高强塑积热轧酸洗钢带,其特征在于,其化学成分组成及质量百分含量为:C:0.080~0.10%,Si:0.20~0.30%,Mn:1.20~1.50%,P:0.015~0.025%,S≤0.008%,Als:0.025~0.055%,Nb:0.03~0.05%,Ti:0.06~0.08%,其余为Fe和不可避免的杂质。
2.根据权利要求1所述的一种薄规格高强塑积热轧酸洗钢带,其特征在于,所述钢带厚度为1.8~8.0mm,宽度为1000~1650mm。
3.根据权利要求1所述的一种薄规格高强塑积热轧酸洗钢带,其特征在于,所述钢带力学性能:屈服强度≥600MPa,抗拉强度≥700MPa,断后伸长率A50≥25%,强塑积≥18GPa%。
4.基于权利要求1-3任一所述的一种薄规格高强塑积热轧酸洗钢带的生产方法,其特征在于,包括连铸工序、热连轧工序和酸洗工序;
所述连铸工序,板坯厚度为230mm;
热连轧工序,板坯均热段温度为1200~1260℃,出炉温度为1250±20℃,加热时间为180~260min;中间坯厚度为30~60mm;粗轧出口温度为1060~1100℃,精轧入口温度为1030±20℃;精轧出口温度:1.8≤H≤4.0mm为890±15℃,4.0<H≤8.0mm为880±15℃;卷取温度为550±15℃,H为热轧板的厚度;
酸洗工序,采用推拉式浅槽紊流酸洗+平整工艺,酸洗第一个酸槽的自由酸浓度≥30g/L,最后一个酸槽的自由酸浓度≥150g/L;酸液温度为75~90℃;漂洗水电导率≤50us/cm,漂洗水温度50~80℃;平整延伸率为0.5~3.0%。
5.根据权利要求1所述的一种薄规格高强塑积热轧酸洗钢带,其特征在于,所述热连轧工序,炉后除鳞箱采用双排除鳞,系统压力≥25MPa;R1与R2机前除鳞箱采用奇数道次除鳞,系统压力≥25MPa;精轧机前除鳞箱采用双排除鳞,系统压力≥25MPa;根据钢带宽度可使用定宽压力机,最大减宽量为220mm;H≤3.0mm的钢带投用保温罩;H≤4.0mm的钢带使用边部加热器,加热温度30~80℃;轧后冷却采用前段层流冷却模式,使用U型冷却策略,头部与尾部各40m的卷取温度比设定值高30℃。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106636907A (zh) * | 2016-12-29 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | 屈服强度600MPa级薄规格厢体钢带及其制造方法 |
CN107460404A (zh) * | 2017-07-17 | 2017-12-12 | 河钢股份有限公司 | 一种屈服强度800MPa超高强带钢及其制备方法 |
WO2018117552A1 (ko) * | 2016-12-23 | 2018-06-28 | 주식회사 포스코 | 굽힘가공성이 우수한 초고강도 열연강판 및 그 제조방법 |
CN111020437A (zh) * | 2019-12-25 | 2020-04-17 | 山东钢铁集团日照有限公司 | 一种屈服强度580Mpa级以上热镀锌钢带的制造方法 |
CN115652217A (zh) * | 2022-11-15 | 2023-01-31 | 山东钢铁集团日照有限公司 | 一种具有高强塑积的高强度波形梁用钢材及其生产方法 |
-
2023
- 2023-02-22 CN CN202310148446.8A patent/CN116103571A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018117552A1 (ko) * | 2016-12-23 | 2018-06-28 | 주식회사 포스코 | 굽힘가공성이 우수한 초고강도 열연강판 및 그 제조방법 |
CN106636907A (zh) * | 2016-12-29 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | 屈服强度600MPa级薄规格厢体钢带及其制造方法 |
CN107460404A (zh) * | 2017-07-17 | 2017-12-12 | 河钢股份有限公司 | 一种屈服强度800MPa超高强带钢及其制备方法 |
CN111020437A (zh) * | 2019-12-25 | 2020-04-17 | 山东钢铁集团日照有限公司 | 一种屈服强度580Mpa级以上热镀锌钢带的制造方法 |
CN115652217A (zh) * | 2022-11-15 | 2023-01-31 | 山东钢铁集团日照有限公司 | 一种具有高强塑积的高强度波形梁用钢材及其生产方法 |
Non-Patent Citations (1)
Title |
---|
康永林: "现代汽车板理论工艺与成形技术", 28 February 2009, 冶金工业出版社, pages: 433 * |
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