模切辊激光表面淬火的研究  

Investigation of laser surface hardening for mould-cutting roller

作　　者：晁明举[1] 杜远东[2] 梁二军[1] 余菊美[1] 

机构地区：[1]郑州大学物理工程学院,郑州450052 [2]周口师范学院物理系,周口466000

出　　处：《激光技术》2003年第6期500-502,509,共4页Laser Technology

基　　金：河南省高校创新人才基金; 2 0 0 1年度河南省杰出人才创新基金资助项目

摘　　要：用连续波CO2 激光束对 5 0 # 钢模切辊进行了激光表面淬火试验 ,研究了淬火层的显微组织及硬度分布。结果表明 ,5 0 # 钢模切辊经激光表面淬火后 ,硬化层组织由细小的位错马氏体及少量的残余奥氏体组成 ;模切辊变形很小 ,且表面硬度高 ,整体硬度分布较为均匀 ,能够达到技术要求。采用激光淬火技术对 5 0 #The laser surface hardening for mould-cutting roller of 50 carbon steel is carried out using continuous wave CO 2 laser beam. The microstructure observation and hardness distribution testing in the cross-section of the hardened layer are performed. The results indicate that the microstructure of the hardened layer of mould-cutting roller quenched consists of the fine dislocated lath martensite and a small quantity of residual austenite. After laser surface hardening,the mould-cutting roller possesses of small contraction distortion,high hardness,and uniform distribution of hardness. And hence using laser surface hardening process to modify the surface of mould-cutting roller of 50 carbon steel is practicable.

关 键 词：激光表面淬火 50^#钢 模切辊 CO2激光 

分 类 号：TG156.99[金属学及工艺—热处理]