刘海军,朱定一,胡真明,宋卫涛,王明杰

• 1:福州大学材料科学与工程学院
• 2:福建省三钢(集团)有限责任公司
• 3:福建工程学院材料科学与工程系

摘要(Abstract)：

Fe-20Mn-3Cu-1.3C钢经热轧,冷轧后分别在950、970和1050℃下保温10 min进行再结晶处理,得到平均晶粒尺寸为18.12、24.56和47.00μm的试样。硬度测试表明,随着晶粒尺寸的增大,合金拉伸变形前的显微维氏硬度而逐渐减小,而合金拉伸变形前后的硬度变化量逐渐增大。拉伸测试表明,在低应变阶段,TWIP钢应变硬化速率随真应变的增加而明显增加,而其增幅未随晶粒尺寸的增大发生明显变化;随着应变的增加,其应变硬化指数增加的幅度随晶粒尺寸的增大而增大。在低应变阶段,位错强化起主要作用;而高应变阶段,孪晶硬化起主要作用。

关键词(KeyWords)： TWIP钢;晶粒尺寸;加工硬化速率;加工硬化指数

Abstract:

Keywords:

基金项目(Foundation): 福建省高校产学合作科技重大项目(2011H6012);; 福建省自然科学基金资助项目(2011J01292)

作者(Author): 刘海军,朱定一,胡真明,宋卫涛,王明杰

DOI: 10.13289/j.issn.1009-6264.2013.04.018

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