镀锌钢板的光纤耦合半导体激光焊接性能  

Welding Performances of Galvanized Sheet Using the Fiber Coupled Diode Laser

作　　者：徐国建[1] 钟立明[1] 杭争翔[1] 林久胜 傅新皓 武斌斌 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [2]沈阳工业大学电气工程学院,辽宁沈阳110870 [3]鞍山煜宸科技有限公司,辽宁鞍山114044

出　　处：《激光与光电子学进展》2014年第7期74-78,共5页Laser & Optoelectronics Progress

基　　金：沈阳市科学技术计划项目(F13-319-6-03)

摘　　要：采用光纤耦合半导体激光器(LDF4000-40)组成的焊接系统,研究了其在汽车制造领域对不等厚(厚度t=0.7/1.4 mm)镀锌钢板的焊接性能。试验结果表明,与CO2激光焊接相比,光纤耦合半导体激光焊接过程更加稳定,焊缝成型美观且更易控制,焊接速度得到大幅提高;镀锌钢板焊接接头的拉伸强度和延伸率满足汽车行业的标准要求,且断裂位置在母材上;镀锌钢板焊缝金属由铁素体和部分珠光体组成,焊缝金属硬度相比于母材提高50%;在同等激光输出功率条件下,光纤耦合半导体激光与CO2激光比较,其焊接速度提高1.2倍以上。The paper adopts the fiber coupled diode laser welding system of LDF4000-40 and studies the welding performances of galvanized sheet with different thicknesses （t=0.7/1.4 mm） in the automobile industry. The results show that compared with the CO2 laser welding, it has better process stability, better welding bead with easier control, and faster welding speed. The tensile strength and elongation of the galvanized sheet welded joints meet the standard requirements of the motor industry and the cracks generate in the base metal parts. The galvanized steel weld metal includes ferrite and pearlite, so that the weld metal is 1.5 times the hardness of the base metal. Under the same condition of laser output power, the welding speed of fiber coupled diode laser increased more than 1.2 times compared with that of the CO2 laser.

关 键 词：激光技术 光纤耦合半导体激光 镀锌钢板 薄板焊接 焊接性能 CO2激光 

分 类 号：TG456.7[金属学及工艺—焊接]