徐德超,赵海峰,李学涛,范红妹,滕华湘,崔阳

• 1:首钢集团有限公司技术研究院
• 2:绿色可循环钢铁流程北京市重点实验室
• 3:首钢京唐钢铁联合有限责任公司

摘要(Abstract)：

对22Mn B5热成形钢进行淬火和回火处理,利用扫描电镜、透射电镜、电子背散射衍射技术、室温拉伸检测等方法研究回火温度对22Mn B5热成形钢显微组织和力学性能的影响。结果表明:随着回火温度(100~500℃)的升高,22Mn B5热成形钢的抗拉强度逐渐降低,温度超过200℃后显著降低,屈服强度先略为降低(100℃)再略为升高(200℃)最后显著降低(超过200℃),总伸长率逐渐提高,板条马氏体发生回复和再结晶,板条间的小角度晶界减少,板条边界逐渐模糊,马氏体板条粗化明显;经200℃保温10 min回火后,大部分板条马氏体略有粗化,屈服强度较100℃保温10 min先降低后略为提高至1292 MPa,伸长率为6.2%,出现硬化效应,热成形钢的综合力学性能得到明显改善。

关键词(KeyWords)： 热成形钢;22Mn B5;回火;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 徐德超,赵海峰,李学涛,范红妹,滕华湘,崔阳

DOI: 10.13289/j.issn.1009-6264.2018-0109

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