高强钢厚板机器人激光焊接及接头硬度  

Laser welding robot on thick plate and the weld hardness analysis

作　　者：杨昌权[1] 

机构地区：[1]黄冈师范学院数理学院,湖北黄州438000

出　　处：《电焊机》2016年第4期101-104,共4页Electric Welding Machine

摘　　要：采用高功率光纤激光焊接机器人对S355高强钢厚板进行高速焊接,获得无缺陷的焊缝,结合硬度实验研究焊接工艺参数对表面硬度的影响。结果表明：S355钢的基体硬度为190~200 HV时,其热影响区硬度会增加至450~500 HV;随着焊接速度增加或激光功率减小,焊缝平均硬度逐渐升高,热影响区的平均宽度逐渐减小。通过降低焊接速度可以缩小基体与焊缝的硬度差异。Using high power fiber laser wehling robot to the high speed welding of high strength steel plate S355,get no weld defects, anti combining the hardness experiments to study the influence of welding process parameters on surface hardness. The results show that S355 steel matrix hardness is 190-200 HV,the heat affected zone hardness inereases to 450-500 HV. Along with the increase of welding speed or the decrease of the laser power,welding seam average hardness is increased,the average width of heat affected zone decreases. Can narrow the difference of the hardness of substrate and weld by reducing the welding speed.

关 键 词：厚板 激光焊接 焊缝硬度 

分 类 号：TG456.7[金属学及工艺—焊接]