郭卫民,王作成,刘胜,宋立彬,王协彬,王晓

• 1:山东大学材料液固结构演变与加工教育部重点实验室
• 2:山东大学材料科学与工程学院

摘要(Abstract)：

通过拉伸试验检测力学性能,用金相显微镜观察高强IF钢热轧态及退火态的纤维组织,并用透射电镜观察试验钢中的析出相粒子。在640℃终轧温度下,铁素体区轧制总压下率由60%升高到81%,高强热轧IF钢板的屈服强度为150～180 MPa,抗拉强度为312～321 MPa,屈强比为0.48～0.56,总伸长率为26.4%～31.2%,n值为0.22～0.23,而r值则由1.41降低到1.01,|Δr|则由0.625降低到0.133。结果表明,轧制总压下率对热轧高强IF钢的屈服强度、抗拉强度、总伸长率以及n值影响较小,但是对r值和平面各向异性值Δr的影响非常大。铁素体区轧制总压下率的增大使得高强IF钢热轧板中动态再结晶的驱动力增大,发生动态再结晶晶粒的数目增多,从而导致形变织构的减弱和后续退火再结晶驱动力的减小。同时,随着铁素体区轧制总压下率的增大,高强IF钢退火再结晶程度降低以及析出的粒子变细。

关键词(KeyWords)： 高强IF钢;压下率;深冲性能;铁素体区轧制

Abstract:

Keywords:

基金项目(Foundation): 山东省科技厅计划项目(9925)

作者(Author): 郭卫民,王作成,刘胜,宋立彬,王协彬,王晓

DOI: 10.13289/j.issn.1009-6264.2011.04.021

参考文献(References)：

• [1]王昭东,郭艳辉,赵忠,等.应用铁素体区热轧工艺开发超低碳热轧深冲板[J].东北大学学报:自然科学版,2005,26(8):757-750.WANG Zhao-dong,GUO Yan-hui,ZHAO Zhong,et al.Appling ferritic hot rolling process to develop ultra-low carbon deep-drawing plate[J].Journal of Northeastern University:Natural Science,2005,26(8):757-750.
• [2]尚建辉,王先进,茹铮.精轧工艺参数对Ti-IF钢第二相粒子析出行为的影响[J].北京科技大学学报,2000,22(1):44-48.SHANG Jian-hui,WANG Xian-jin,RU Jing.Effect of total finish-rolling strain and pass strains on precipitating behavior in Ti-IF steels[J].Journalof University of Science and Technology Beijing,2000,22(1):44-48.
• [3]Akbari G H,Sellars C M,Whiteman J A.Microstructure development during warm rolling of an IF steel[J].Acta Materialia,1997,45(12):5047-5058.
• [4]Tsukatani I.Effect of hot band microstructure factors on recrystallization texture in Ti-added ultra-low carbon cold-rolled sheet steels[J].ISIJInternational,1998,38(6):625-632.
• [5]杨平,李志超,毛卫民,等.钢中｛111｝〈112〉再结晶织构的形成[J].材料热处理学报,2009,30(3):46-52.Yang Ping,Li Zhi-chao,Mao Wei-min,et al.Formation of the｛111｝〈112〉annealing texture in steels[J].Transactions of Materials and HeatTreatment,2009,30(3):46-52.
• [6]Tiitto K M,Jung C,Garcia C I.Evolution of texture in ferritically hot rolled Ti and Ti+Nb alloyed ULC steels during cold rolling and annealing[J].ISIJ International,2004,44(2):403-413.
• [7]马衍伟,王先进,李慧琴,等.退火工艺对超深冲Nb+Ti-IF钢性能的影响[J].金属热处理学报,1998,19(1):16-20.Ma Yan-wei,Wang Xian-jin,Li Hui-qin,et al.Effect of annealing on the properties of Nb+Ti-IF bearing steel[J].Transactions of Metal HeatTreatment,1998,19(1):16-20.
• [8]王作成,关小军,赵罕.多道次热轧温度及压下率对热轧IF钢深冲性能的影响[J].特殊钢,1999,20(3):21-23.WANG Zuo-cheng,GUAN Xiao-jun,ZHAO Han.Effect of multiple-pass hot rolling temperature and reduction rate on deep-drawing properties ofinterstitial-free steel[J].Special Steel,1999,20(3):21-23.
• [9]韩福涛.冶金因素对热轧深冲无间隙原子(IF)钢板组织性能影响的研究[D].山东大学,2009.
• [10]Ghosh P,Ghosh C,Ray R K.Precipitation behavior and texture formation at different stages of processing in an interstitial free high strength steel[J].Scripta Materialia,2008,59(3):276-278.
• [11]胡恒法,裴新华.热轧薄板冲压性能研究[J].轧钢,2004,21(3):4-7.HU Heng-fa,PEI Xin-hua.Study of pressing property of hot rolled sheet[J].Steel Rolling,2004,21(3):4-7.

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