张坤,唐荻,武会宾,杨跃辉

• 1:北京科技大学高效轧制工程研究中心

摘要(Abstract)：

淬火+两相区淬火+回火(QIT)能显著的提高9Ni钢的低温韧性。利用扫描电镜(SEM)、透射电镜(TEM)、电子背散射衍射(EBSD)、X射线衍射(XRD)和电子探针(EPMA)对QIT处理的9Ni钢中逆转变奥氏体的含量、形貌、分布以及两相区淬火对逆转变奥氏体的影响进行了研究。结果表明,QIT处理的9Ni钢中逆转变奥氏体的含量约为10%,以块状和薄膜状形态分布在基体中;两相区淬火的9Ni钢中的大角度晶界增多,有利于逆转变奥氏体的形核;基体上某些区域的C、Mn和Ni元素含量较高,利于逆转变奥氏体长大和稳定化。

关键词(KeyWords)： 9Ni钢;逆转变奥氏体;两相区淬火

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划资助项目(2006BAE03A06)

作者(Author): 张坤,唐荻,武会宾,杨跃辉

DOI: 10.13289/j.issn.1009-6264.2012.08.012

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