刘佳,邓想涛,黄龙,王昭东

• 1:东北大学轧制自动化及连轧国家重点实验室

摘要(Abstract)：

采用应变诱发马氏体退火逆相变的方法制备了18Cr-8Ni奥氏体不锈钢的纳米/超细晶组织,并对其力学性能和变形机制进行了分析。通过对奥氏体不锈钢进行室温轧制(压下率为70%)以及分别进行710℃×10 min,760℃×5 min和950℃×5 min的退火处理来获得不同晶粒尺寸的组织。结果表明:纳米/超细晶的平均晶粒尺寸为400 nm,屈服强度为878 MPa,伸长率为33%。对粗晶和纳米/超细晶钢的变形行为进行研究发现,纳米/超细晶钢断口处的显微组织存在大量的应变诱发马氏体和少量的孪晶。然而,在粗晶钢的断口处观察到了应变诱发马氏体、高密度位错和剪切带组织。

关键词(KeyWords)： 奥氏体不锈钢;应变诱发马氏体;纳米/超细晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(Nos.51474064,51874089);; 中央高校基本科研专项资金(N160708001)

作者(Author): 刘佳,邓想涛,黄龙,王昭东

DOI: 10.13289/j.issn.1009-6264.2018-0423

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