武会宾,唐荻,蔡庆伍,焦多田

• 1:北京科技大学冶金工程研究院

摘要(Abstract)：

利用热模拟方法并结合彩色金相和EBSD技术,分析了在线重加热速率对X80管线钢组织中M/A岛的含量和分布的影响规律。结果表明,重加热速率在一定范围内升高,能够有效延迟位错回复、增大碳原子扩散速率,促进残留奥氏体中碳的富集,有利于晶内细小M/A岛的形成。重加热速率由20℃/s升高到50℃/s的过程中,M/A岛的百分含量基本呈现单调上升趋势,其分布位置也开始由晶界为主转变为晶内、晶界同时存在,当重加热速率高于50℃/s后,M/A岛的百分含量开始呈现下降趋势,同时又以晶界分布为主,重加热速率为50℃/s时,M/A岛的含量达到峰值,呈现晶内、晶界同时分布的理想状态。

关键词(KeyWords)： 重加热;X80管线钢;M/A岛

Abstract:

Keywords:

基金项目(Foundation): 中央高校基础科研业务费(FRF-BR-10-035B)

作者(Author): 武会宾,唐荻,蔡庆伍,焦多田

DOI: 10.13289/j.issn.1009-6264.2012.06.022

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