激光熔覆WC颗粒增强Ni基合金组织性能的研究  

Research on Microstructure and Property of Ni-WC Composite Material Made by Laser Cladding

作　　者：张伟[1,2,3] 石淑琴 陈云祥[1] 郑炉玉[1] 

机构地区：[1]浙江机电职业技术学院机械工程学院,浙江杭州310053 [2]宁波双林汽车部件股份有限公司,浙江宁海315613 [3]浙江大学计算机科学与技术博士后科研流动站,浙江杭州310027

出　　处：《应用激光》2012年第1期18-21,共4页Applied Laser

基　　金：浙江省教育厅科研资助项目(项目编号:Y201120211);2010年浙江省高等学校优秀青年教师资助计划(项目编号:2010299)

摘　　要：在H13钢表面进行了激光熔覆Ni基合金+WC粉末实验,测试了熔覆层的组织和性能。实验表明激光熔覆可以得到组织致密,晶粒细化,稀释率低,与基体结合牢固的表面强化层。熔覆层的平均硬度为630 HV0.2,耐磨损性能比基体提高145%。H13钢是常用热作模具钢之一,由于工作条件恶劣,经常发生磨损失效,经激光熔覆强化后,其使用寿命将大大提高。The experiment of laser cladding on the surface of H13 steel was made.Tungsten carbide（WC） powder and Ni-base alloy powder were used as cladding material.The microstiucture and property of laser cladding layer were studied.The research showed that laser cladding layer had better properties such as compact tissue,minute crystals,low rate of dilution and good metallurgical bonding with base metal.The average hardness of cladding zone was 630 HV0.2.The anti-abrasive performance of cladding increased 145%than that of base material.H13 steel was widely used in the field of hot dies.Using laser cladding,the good wearing layer would greatly increase the mold useful life.

关 键 词：激光熔覆 显微组织 性能 镍基合金 碳化钨 

分 类 号：TG156.99[金属学及工艺—热处理]