定巍,龚志华,唐荻,江海涛,王宝峰

• 1:内蒙古科技大学材料与冶金学院
• 2:北京科技大学高效轧制国家研究中心
• 3:内蒙古科技大学国际学院

摘要(Abstract)：

制备了一种含回火马氏体组织的TRIP钢(TAM钢),利用拉伸试验机、金相显微镜以及XRD对其力学性能、微观组织特别是残留奥氏体进行了研究,并与传统的TRIP钢进行对比。结果表明:TAM钢的抗拉强度略低于传统的TRIP钢(TPF钢),但是其伸长率远远高于TPF钢,高达32%以上,且拥有良好的加工硬化;TAM钢的微观组织由多边形铁素体、贝氏体、残留奥氏体以及回火马氏体构成;TAM钢的残留奥氏体量和碳含量与TPF钢没有明显差异,但是其残奥分布位置却不同,TAM钢中有部分残奥分布在回火马氏体组织内。在此基础上通过SEM原位拉伸试验对TAM钢在变形过程中的裂纹扩展进行了观察,发现裂纹前端在扩展过程受阻于到回火马氏体。

关键词(KeyWords)： TAM钢;回火马氏体;力学性能;微观组织;扫描原位拉伸

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50804005)

作者(Author): 定巍,龚志华,唐荻,江海涛,王宝峰

DOI: 10.13289/j.issn.1009-6264.2013.02.011

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