田亚强,蔡志新,毕文强,杨子旋,李红斌,潘红波,陈连生

• 1:华北理工大学教育部现代冶金技术重点试验室
• 2:宁波大学冲击与安全工程教育部重点试验室
• 3:安徽工业大学冶金减排与资源综合利用教育部重点试验室

摘要(Abstract)：

采用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)、电子探针(EPMA)、室温拉伸等研究了0.1C-7.2Mn钢两相区温轧淬火处理后合金元素配分对碳化物、残留奥氏体、力学性能及加工硬化行为的影响。结果表明:随着退火时间的延长,经两相区保温后淬火(I&Q)处理的试验钢初始组织中多边形马氏体转变为板条状铁素体和奥氏体,铁素体沿长度方向长大变细;经两相区轧制保温后淬火(DI&Q)处理后,富C、富Mn碳化物先析出后溶解,同时铁素体回复多边化加剧,残留奥氏体由板条状逐渐转变为等轴状。相比I&Q处理,经DI&Q处理后,试验钢组织中富C区面积比由3.9%增加到8.7%,富Mn区面积比由0.9%增加到5.1%,残留奥氏体的含量由11.5%提高到17%,抗拉强度由1032.7 MPa提高到1171.5 MPa,断后伸长率由8.3%提高到15.8%,强塑积为18.5 GPa·%。

关键词(KeyWords)： 中锰TRIP钢;两相区温轧淬火;C、Mn元素配分;残留奥氏体;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51801106,U1860105);; 河北省钢铁联合基金(E2020209124,E2020209127);; 河北省高等学校科学技术研究项目(QN2019051,ZD2019064);; 辽宁省自然科学基金(2019-KF-25-01)

作者(Author): 田亚强,蔡志新,毕文强,杨子旋,李红斌,潘红波,陈连生

DOI: 10.13289/j.issn.1009-6264.2021-0167

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