H13模具钢激光相变强韧化处理研究  

Researches on Hardening and Toughing Treatment of H13 Die Steel by Laser Scanning Phase-change

作　　者：周健[1] 李立君[1] 

机构地区：[1]中南林业科技大学机电学院,湖南长沙410004

出　　处：《矿冶工程》2008年第2期100-103,共4页Mining and Metallurgical Engineering

基　　金：中南林业科技大学青年科学基金项目(07046B)

摘　　要：为了优化H13模具钢在激光窄带扫描作用下的工艺参数，介绍了激光功率P、扫描速度V、光斑直径D各工艺参数对淬火层的影响，分析了H13模具钢显微硬度测量结果，对H13模具钢不同搭接量的选择及显微组织进行了观察。结果表明，显微硬度沿激光作用区横向呈有规律分布，在未搭接区硬度值最高，在回火软化区硬度值最低。搭接量的选取范围为18％-20％时较合适，淬硬层最高硬度可达700HV以上。For optimizing the technological parameters of H13 steel under narrow-band laser scanning, the effects of the parameters such as laser power（P）, scanning velocity（V） and facula diameter（D） on quenching-layer were discussed. The measurement results of H13 steel micro-hardness were analyzed. The selection of different amounts of overlap and the microstructures of the hard-quenched layer were observed. The results indicated that the micro-hardness distribution was regular breadthwise along the laser-infected area. The hardness was the highest in the non-lapping area but the lowest in the tempered area. The amount of overlap in the range of 18% - 20% was more suitable. The highest hardness of the quenched layer could be over 700 HV.

关 键 词：H13模具钢 激光窄带扫描 工艺参数 淬火层 硬度 搭接量 显微组织 

分 类 号：TG156.99[金属学及工艺—热处理]