付琴,胡树兵

• 1:华中科技大学材料成形与模具技术国家重点实验室

摘要(Abstract)：

利用激光熔覆技术在45钢上制备Fe-Mo-Ni-Si-B涂层,并进行激光重熔处理。借助光学光学显微镜、环境扫描电子显微镜、X射线衍射仪对涂层的组织结构进行研究,并利用维氏硬度计、磨损试验机、电化学工作站等设备分析了重熔前后涂层的显微硬度、摩擦磨损及耐腐蚀性能。结果表明:利用激光熔覆技术能够在45钢上获得冶金结合良好的Fe-Mo-Ni-Si-B非晶纳米晶复合涂层。熔覆层由晶体相和非晶相混合组成,主要的晶体相包括Fe Si、Fe2B、Fe Ni、Fe3Mo及Fe单质。经过重熔处理后,熔覆层组织细化,晶粒更为细小,非晶相比例提高。熔覆层的硬度可达到1007 HV0.1,而重熔层硬度略提高到1076 HV0.1,与基体相比,都提高了5~6倍;与基体相比,熔覆层的耐磨性和耐蚀性得以提高,其中重熔层更是表现出优异的耐磨性和耐蚀性。

关键词(KeyWords)： 激光熔覆;激光重熔;显微组织;耐磨性;耐蚀性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51375005);; 国家973项目(2014CB046704);; 2010年省部产学研合作重大项目(2010A090200047)

作者(Author): 付琴,胡树兵

DOI: 10.13289/j.issn.1009-6264.2015.11.035

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