黄斌,朱洪武,杨忠,周乐育,刘雅政

• 1:北京科技大学材料科学与工程学院
• 2:西宁特殊钢股份有限公司

摘要(Abstract)：

通过固体渗碳试验研究了加热温度对钎具用钢22Si2MnCrNi2MoA渗碳层的影响,分析了渗碳温度-碳浓度-显微硬度-残留奥氏体的关系以及残留奥氏体的控制措施。结果表明:当渗碳时间为6 h时,随着渗碳温度的升高,渗碳层的碳浓度逐渐增加,碳浓度分布梯度越来越平缓。22Si2MnCrNi2MoA钢渗碳层的显微硬度-碳浓度关系符合正态分布。在渗碳处理过程中,为了使渗碳表层获得硬度很高的马氏体组织,22Si2MnCrNi2MoA钢渗碳层表面碳浓度应该控制在0.80%～0.90%之间。当表面碳浓度超过0.80%～0.90%时,渗碳完成后需采取后续的工艺措施来消除已经存在的残留奥氏体,如采用长时间自然时效或深冷处理等。

关键词(KeyWords)： 钎具用钢;22Si2MnCrNi2MoA;渗碳;残留奥氏体;加热温度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 黄斌,朱洪武,杨忠,周乐育,刘雅政

DOI: 10.13289/j.issn.1009-6264.2013.07.010

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