周芳,朱涛,侯清宇

• 1:贵州大学材料与冶金工程学院
• 2:安徽工业大学材料科学与工程学院

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射、透射电镜以及滑动磨损实验,研究了500℃时效35h处理对激光熔覆Fe901/3%Cu涂层组织结构及性能的影响。结果表明,未经过时效处理的熔覆层主要是由α-Fe(马氏体),M7C3和M23C6构成,并且α-Fe存在(110)晶面的择优取向,在马氏体上分布着高密度的位错,而且位错沿着熔覆基材向熔覆层方向延伸分布。熔覆层经过500℃时效35h以后,熔覆层中富铬碳化物相的相对含量有所增加,并且沿M7C3相由马氏体中析出弥散分布的ε-Cu颗粒,在ε-Cu颗粒附近分布有若干位错,对位错起钉扎作用。熔覆层在时效以后的剖面显微硬度和表面耐磨性能显著提高。

关键词(KeyWords)： 激光熔覆;铜;时效;组织结构;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 贵州省科学技术基金项目(黔科合J字[2007]2179号)

作者(Author): 周芳,朱涛,侯清宇

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