毕红霞,唐明华,周勇,任芝兰

• 1:湖南工学院先进制造技术研究所
• 2:衡阳华菱钢管有限公司技术中心

摘要(Abstract)：

采用力学性能测试、扫描电镜(SEM)、透射电镜(TEM)等研究了不同热处理工艺对新型低合金超高强度45CrNiSiMnMoVA钢的微观组织和力学性能的影响。结果表明:随着奥氏体化温度的不断升高,试验钢的力学性能逐渐提高,并在920℃时达到峰值,达到峰值之后才会缓慢下降;在320～380℃回火后,试验钢的强韧性随回火温度变化的幅度非常小,当回火温度为350℃时,试验钢具有强度、塑性和韧性相配合的最优综合力学性能。分析认为,试验钢的强韧化机理与以"多相、亚稳和多尺度"为核心思想的M~3组织性能调控理论十分吻合。

关键词(KeyWords)： 45CrNiSiMnMoVA钢;马氏体/下贝氏体复相组织;组织与性能

Abstract:

Keywords:

基金项目(Foundation): 湖南省衡阳市产学研专项资金资助项目(2018KJ177)

作者(Author): 毕红霞,唐明华,周勇,任芝兰

DOI: 10.13289/j.issn.1009-6264.2020-0125

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