半导体与CO_2光斑模式下激光熔覆工艺  

Laser cladding by diode laser and CO_2 laser with different beam pattern

作　　者：杜雷明[1] 顾玉芬[1] 石玗[1] 石锋[1] 

机构地区：[1]兰州理工大学省部共建有色金属先进材料加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《电焊机》2016年第5期1-5,共5页Electric Welding Machine

基　　金：973计划前期研究专项(2014CB660810);国家自然科学基金资助项目(51305189);甘肃省自然科学基金资助项目(145RJZA119);省部共建有色金属先进加工与再利用国家重点实验室开放基金(SKLAB02014208);兰州理工大学红柳杰出人才培养计划(J201201)

摘　　要：为了研究不同光斑模式的激光热源熔覆镍基合金效果的差异,分别采用矩形大光斑半导体激光与圆形小光斑CO_2激光在Q235低碳钢表面上进行镍基合金单道熔覆试验。通过相同条件下单道熔覆试验,对比分析不同光斑模式的激光获得的熔覆层尺寸、稀释率以及成形系数随激光功率及扫描速度的变化;还分析了矩形大光斑半导体激光热源与传统圆形小光斑CO_2激光热源的差异。结果表明,在相同工艺参数下,矩形大光斑半导体激光获得的熔覆层尺寸、稀释率及成形系数明显优于传统CO_2激光。To study which of beam pattern can be suitable to make fine bead with less power, diode laser with a rectangular beam profile and conventional CO_2 laser with a circular beam profile were used for cladding of Ni-based alloy on the mild steel（Q235）,respectively.In the paper, the study under different beam pattern lasers on effects of process parameters such as laser power output,travel speed was carried out by single pass cladding experiments,and comparing the clad by conventional CO_2 laser,weld width,low dilution rate could be obtained in diode laser cladding. In addition,models of the heat distribution of diode laser and CO_2 laser were analyzed.The results show that the excellent clad layer with a wider bead and low dilution was obtained by diode laser,compared with CO_2 laser.

关 键 词：激光熔覆 半导体激光 CO2 激光 

分 类 号：TG456.7[金属学及工艺—焊接]