搭接对激光熔覆Ni60合金涂层组织影响的研究  

Influence of Overlapping on the Microstructure of Laser Cladding Ni60 Alloy Coating

作　　者：董刚[1,2,3] 严彪[1] 邓琦林[2] 余廷[2] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]上海交通大学机械与动力工程学院,上海200030 [3]河南科学与技术大学,洛阳471003

出　　处：《材料导报》2010年第22期10-12,共3页Materials Reports

基　　金：国家自然科学基金资助项目(50675136;50375096)

摘　　要：通过激光熔覆在45#钢基体上获得了质量良好的单道和多道搭接的Ni60合金涂层。研究了搭接对激光熔覆Ni60合金涂层显微组织的影响。结果表明,单道熔覆涂层中M7C3型碳化物形貌为树枝状,尺寸较小;多道搭接涂层中M7C3型碳化物形貌为不规则的块状、针状、串珠状等,且尺寸粗大。Ni60 alloy single track and multi-track coatings have been successfully prepared on 45 # carbon steel by laser cladding. The influence of overlapping on the microstructure of laser cladding Ni60 alloy coatings also has been studied. The results show that the M7C3 type carbide has dendrite morphology and the size is fine in the single track coating. The morphology of the M7C3 type carbide has changed from dendrite into blocky, cluster and needle- like shape and the size becomes coarse in the multi-track coating.

关 键 词：激光熔覆 镍基自熔性合金 NI60 M7C3 搭接 

分 类 号：TG174.442[金属学及工艺—金属表面处理]