彭涛,曹建春,赵吉庆,杨钢

• 1:昆明理工大学材料科学与工程学院
• 2:钢铁研究总院特殊钢研究所

摘要(Abstract)：

研究了AMS 6308钢在不同温度回火过程中Cu的强化机制及其对力学性能的影响。结果表明,150~350℃回火,AMS6308钢的组织为回火马氏体,强度和硬度略有增加,韧性下降。400~450℃回火,强度和硬度逐渐增加,这是由大量细小(<10 nm)的ε-Cu相在基体内和位错线上析出造成。450℃回火,ε-Cu相析出数量显著增加,导致强度和硬度达到峰值,韧性最差。450℃以上回火,随温度提高,ε-Cu相长大粗化,析出数量减少,其形态由球状转变为棒状或短杆状,沉淀强化作用减弱,M6C碳化物长大,基体发生回复再结晶,强度和硬度显著下降,韧性逐渐提高。

关键词(KeyWords)： AMS 6308钢;ε-Cu;沉淀强化

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展(863)计划(2012AA03A501)

作者(Author): 彭涛,曹建春,赵吉庆,杨钢

DOI: 10.13289/j.issn.1009-6264.2016.10.023

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