吴腾,胡欣钰,黄博凯,熊维亮,徐耀文,梁文

• 1:武汉科技大学省部共建耐火材料与冶金国家重点实验室
• 2:涟源钢铁有限公司技术中心

摘要(Abstract)：

基于合金减量化原则，应用超快冷+控轧控冷技术制备了超高强热轧双相钢，采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和室温拉伸试验等研究了未再结晶区压下率对双相钢组织性能的影响。结果表明：压下率会影响双相钢组成相的体积分数、形貌及内部亚结构；随着压下率增加，双相钢中的铁素体体积分数和平均晶粒尺寸均增加，马氏体由纤维状向块状转变，其体积分数减少，屈服强度、抗拉强度和伸长率均降低，屈强比先增加后减小，加工硬化率n值增加；压下率为72%时，试验钢的铁素体体积分数为41.2%,铁素体晶粒尺寸为3.1μm,组织中细化的马氏体板条束和较多的铁素体亚晶有利于n值，抗拉强度达到1249 MPa,伸长率为12.5%,屈强比最低为0.59,n值高达0.11,其综合性能最好。

关键词(KeyWords)： 超高强双相钢;压下率;显微组织;成形性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划重点专项(2021YFB3702402);; 湖北省教育厅指导性项目(B2023004)

作者(Author): 吴腾,胡欣钰,黄博凯,熊维亮,徐耀文,梁文

DOI: 10.13289/j.issn.1009-6264.2025-0092

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