张继明,喻春明

• 1:西京学院机械工程学院

摘要(Abstract)：

采用透射电镜(TEM)对X100高钢级管线钢中马奥岛(MA)组织的精细结构进行了分析,并采用原位观察的方法研究了加热过程中MA岛的逆转变行为。结果表明,X100管线钢中MA组织中的马氏体(M)由块状马氏体和孪晶马氏体组成,而残留奥氏体则由块状奥氏体和沿MA晶界分布的薄膜状奥氏体组成,两种组织在MA中交叉弥散分布。MA岛在加热过程中具有较高的稳定性,在400℃以下仅发生孪晶马氏体向马氏体的转变和MA内部碳元素的扩散。当加热温度在A_(c1)以上时,MA中的马氏体开始向奥氏体转变,在低于A_(c3)温度约30℃附近,MA岛完全转变为逆转变奥氏体组织。

关键词(KeyWords)： 管线钢;MA岛;孪晶马氏体;残留奥氏体;逆转变奥氏体

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张继明,喻春明

DOI: 10.13289/j.issn.1009-6264.2020-0260

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