刘宇薇,韦玮,刘亚东,蔡志辉

• 1:东北大学材料科学与工程学院
• 2:辽宁省轻量化用关键金属结构材料制备重点实验室
• 3:攀钢集团研究院有限公司

摘要(Abstract)：

研究了热冲压工艺对Fe-0.2C-11Mn-(2,4)Al中锰钢成形件组织性能的影响。结果表明:当保温温度为750℃时,2Al钢在400℃冲压比在500℃冲压具有更高的伸长率,且力学性能皆优于硼钢,故2Al钢冲压工艺窗口大。同样工艺条件下,4Al钢的抗拉强度为1045/1101 MPa、伸长率为56.0%/52.0%。随着保温温度(2Al:650～750℃,4Al:700～800℃)升高,实验钢的抗拉强度升高,2Al钢伸长率由35.4%减小到13.3%,4Al钢伸长率先增加到56.0%后减至31.7%。微观组织观察和X射线衍射仪(XRD)分析结果表明,两种实验钢在变形过程中均会发生TRIP效应,4Al钢具有铁素体协调变形及不连续TRIP效应,其塑性远高于2Al钢,但2Al钢具有更显著的TRIP效应,马氏体含量高,具有强烈的加工硬化特征因而呈现出更高的强度。

关键词(KeyWords)： 中锰钢;热冲压;TRIP效应;组织性能;加工硬化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(51974084);; 国家级大学生创新创业训练计划资助项目(201910145118);; 中央高校基本科研业务专项资金资助(N182410001)

作者(Author): 刘宇薇,韦玮,刘亚东,蔡志辉

DOI: 10.13289/j.issn.1009-6264.2020-0078

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