吴光辉,蔡焕,昝启飞,胡锋

• 1:衡阳华菱钢管有限公司
• 2:武汉科技大学冶金工业过程系统科学湖北省重点实验室
• 3:武汉科技大学高性能钢铁材料及其应用省部共建协同创新中心

摘要(Abstract)：

强磁场作为重要的金属相变影响因素，可以明显提高奥氏体到马氏体相变的开始温度并影响最终的马氏体微观组织。然而，关于强磁场对马氏体回复影响的研究甚少。研究了强磁场对Fe-C-W合金钢在不同温度回火1 h后马氏体组织回复的影响。结果表明，强磁场的施加使基体中碳化物的数密度明显增加，其原因为强磁场增大了碳化物的磁化强度，降低了其磁自由能，使其形核驱动力增加。低温200℃回火时强磁场对马氏体回复的抑制作用不明显。当回火温度升高至500℃时，12 T强磁场的施加，明显增强了碳化物对位错运动的阻碍作用，大大抑制了位错的回复，使基体中残留的位错密度提高了约27.5%。高密度的位错明显增加了小角度晶界的含量，使马氏体板条平均宽度降低了约137 nm,表明强磁场的施加明显抑制了马氏体的回复。

关键词(KeyWords)： 强磁场;马氏体回复;碳化物;位错;小角度晶界

Abstract:

Keywords:

基金项目(Foundation): 湖南省“小荷”人才计划;; 湖南省芙蓉计划湖湘青年英才项目(2023RC3254)

作者(Author): 吴光辉,蔡焕,昝启飞,胡锋

DOI: 10.13289/j.issn.1009-6264.2023-0490

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