刘旋,陈雨琳,陆兴,赵新青,殷匠,平德海

• 1:大连交通大学材料科学与工程学院
• 2:日本国立材料科学研究机构
• 3:北京航空航天大学材料科学与工程学院
• 4:上海茵矩材料科技有限公司(贝钢锁材)

摘要(Abstract)：

利用透射电子显微分析技术研究不同碳含量Fe-C二元合金淬火态马氏体的精细结构。结果表明:不同碳含量钢中的马氏体组织由体心立方{112}<111>型孪晶以及孪晶界上的ω相组成;由于低碳钢中的马氏体相变开始温度(Ms)较高,室温下观察到的马氏体的微观组织是孪晶与ω相经自回火后的产物;中碳和高碳钢具有较低的Ms,其自回火效应的影响较弱,可使相变孪晶与ω相相对完整地保留至室温;马氏体中的孪晶由极细且均匀的α-Fe晶粒构成,孪晶界上的ω相颗粒尺寸为1~2 nm;这种细小晶粒的形成可以通过局部原子的集团运动来实现。

关键词(KeyWords)： 碳钢;马氏体;相变;透射电镜;孪晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51671043,51271200);; 日本JSPS科研费(JP15H02304)

作者(Author): 刘旋,陈雨琳,陆兴,赵新青,殷匠,平德海

DOI: 10.13289/j.issn.1009-6264.2018-0080

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