数控机床高速钢刀具激光熔覆Co-WC的组织与切削加工性能  

Microstructure and Machinability of Laser Cladding Co-WC on High Speed Steel Tools for Numerical Control Machine Tools

作　　者：胡桂领 师鹏 张磊 Hu Guiling;Shi Peng;Zhang Lei(College of Mechanical and Electrical Engineering,Henan Vocational University of Science and Technology,Zhoukou 466000,Henan,China)

机构地区：[1]河南科技职业大学机电工程学院,河南周口466000

出　　处：《激光与光电子学进展》2022年第11期340-347,共8页Laser & Optoelectronics Progress

基　　金：2020年度河南省高等学校青年骨干教师培养计划(2020GGJS300)。

摘　　要：在数控机床损伤的高速钢刀具表面激光熔覆制备了Co基WC复合修复层,结果表明:高速钢基体与修复层的界面冶金结合良好,无明显缺陷,修复层主要由Co基FCC晶体结构和三种类型的碳化物组成,显微硬度最高达到(1625±63)HV,比高速钢基体的显微硬度提高了大约364.3%,平均摩擦系数达到0.65,磨损表面相对于高速钢刀具较为完好。同时,切削试验表明具有Co-WC修复层的高速钢刀具切削后前刀面O含量较低,具有更好的切削性能。In this paper,Cobased WC composite coating was prepared by laser cladding on the surface of high speed steel(HSS)tools damaged for numerical control machine tools.The results show that the interface metallurgical bonding between HSS substrate and repair layer is good without obvious defects.The repair layer is mainly composed of a Cobased FCC crystal structure and three types of carbides.The microhardness is about(1625±63)HV,which is 364.3%higher than that of the HSS substrate.The average friction coefficient is 0.65.The wear surface is relatively intact compared with the HSS tool.Cutting experiments show that the HSS tool with the CoWC repair layer has lower O content on the rake face and better cutting performance.

关 键 词：激光技术 激光熔覆 数控机床 金属基复合材料 高速钢刀具 切削加工性能 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]