余伟,王潇,何博,谢保盛

• 1:北京科技大学冶金工程研究院

摘要(Abstract)：

通过轧后控冷至贝氏体等温区间并采用不同等温工艺研究了贝氏体区等温时间对TRIP钢组织性能的影响。研究表明,随着等温时间的延长,残留奥氏体含量和稳定性逐渐降低。各等温工艺下残留奥氏体晶粒尺寸均主要分布在0.1~1μm区间范围内,平均晶粒尺寸随着等温时间的延长有逐渐增大的趋势。贝氏体区等温30 min和60 min时,TRIP钢的力学性能优异,强塑积超过了22000 MPa·%;模拟卷取过程的等温60 min后随炉缓冷至室温时,由于组织中残留奥氏体含量和稳定性大幅度降低,TRIP效应不理想。钢板的力学性能显著恶化,抗拉强度和伸长率仅为847 MPa和20%。

关键词(KeyWords)： 热轧TRIP钢;等温时间;显微组织;残留奥氏体;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家高技术发展计划资助项目(2008AA03Z502)

作者(Author): 余伟,王潇,何博,谢保盛

DOI: 10.13289/j.issn.1009-6264.2015.02.024

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