扫描速度对镁合金激光熔凝层组织及性能的影响  

Effect of Scanning Speed on Microstructure and Properties of Laser Melted Case of Magnesium Alloy

作　　者：包全合[1] 赵昆[1,2] 刘家阔[1] 

机构地区：[1]安徽工业大学材料科学与工程学院安徽省金属材料与加工重点实验室,安徽马鞍山243002 [2]中国重型汽车集团有限公司,山东济南250002

出　　处：《热处理》2010年第6期26-29,共4页Heat Treatment

基　　金：安徽工业大学青年教师基金资助项目(QZ200903)

摘　　要：采用500 W脉冲激光器以不同扫描速度在AZ91D镁合金表面进行激光熔凝,运用XRD、SEM、EDS等手段测试了熔凝层的组织、显微硬度、耐磨性、耐腐蚀性等。结果表明,激光熔凝能提高镁合金的表面硬度及耐磨性,但未能提高其耐蚀性能。激光扫描速度对熔凝层的硬度影响不大。The laser melted AZ91D magnesium alloy cases were prepared with a 500 W pulse laser at different scanning speeds.The microstructure,microhardness,wear and corrosion resistances of laser melted cases were tested by XRD,SEM,and EDS.The results show that the laser melting may improve the surface hardness and wear resistance of AZ91D magnesium alloy,but the corrosion resistance will not be increased.In addition,the laser scanning speed has no considerable influence on the hardness of laser melted cases.

关 键 词：AZ91D镁合金 激光熔凝 性能 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG166.4