激光熔覆复合涂层裂纹控制研究进展  

Research progress on crack control of laser clad composite coating

作　　者：刘海青[1] 葛超 王志文 周伟 职山杰[1] 成明[2] 陈海娟 Liu Haiqing;Ge Chao;Wang Zhiwen;Zhou Wei;Zhi Shanjie;Cheng Ming;Chen Haijuan(Applied Technical School of Soochow University,Soochow Jiangsu 215325,China;School of Urban Rail Translation,Soochow University,Suzhou Jiangsu 215000,China)

机构地区：[1]苏州大学应用技术学院,江苏苏州215325 [2]苏州大学城市轨道交通学院,江苏苏州215000

出　　处：《金属热处理》2018年第8期228-232,共5页Heat Treatment of Metals

基　　金：江苏省自然科学基金-青年基金(BK20150344);中国博士后科学基金(2016M601885);江苏省创新创业项目(201713984010Y);苏州大学应用技术学院第二十批大学生学术科研基金(KY2018730B,KY2018727B)

摘　　要：激光熔覆是一种先进的表面改性技术,在航空航天、石油化工等领域应用广泛。本文综述了激光熔覆复合涂层裂纹的研究进展,阐述了裂纹的分类、形成原因以及扩展机理,并从优化工艺参数、预热和后处理、添加合金元素等方面,总结了控制裂纹产生的防止措施,提出了一些解决熔覆层开裂问题的建议以及今后的研究方向和思路。Laser cladding is an advanced surface modification technique which has a broad prospect of applications in Aerospace,petroleum and chemical industry and so on. The forming mechanism and category of crack were deeply discussed. The way of preventing from cracks in laser clad layer was summarized including optimizing the parameters of cladding process,making the pre-heating and the post-processing,adding alloying elements and so on. The control measures of preventing cracks were summarized and some suggestions of solving problems of clad layer cracking were put forward which may provide reference for laser cladding crack control.

关 键 词：激光熔覆 裂纹机理 工艺参数 裂纹预防 

分 类 号：TG174.44[金属学及工艺—金属表面处理]