蓝光半导体与光纤激光复合焊接紫铜工艺研究  

Study on the Technology of Blue Light Diode Laser and Fiber Laser Composite Welding of Copper

作　　者：史亚贝[1] 田辉[2] Shi Yabei;Tian Hui(Henan Polytechnic Institute,Nanyang,Henan 473000,China;Henan Agricultural University,Zhengzhou,Henan 450046,China)

机构地区：[1]河南工业职业技术学院,河南南阳473000 [2]河南农业大学,河南郑州450046

出　　处：《应用激光》2022年第11期22-28,共7页Applied Laser

基　　金：2020年度校级青年骨干教师培养计划项目(202003)。

摘　　要：紫铜对近红外光纤激光器(波长1070 nm)的吸收率较低,只有4%,需要采用高的功率才能焊接,高的功率容易产生气孔等缺陷。采用蓝光半导体与近红外光纤激光器复合焊接厚度为3 mm的紫铜,优化焊接工艺参数。将光纤激光焊接、蓝光半导体激光焊接、蓝光半导体激光与光纤激光复合焊接的焊缝进行切片分析以及微观组织分析,并且对焊缝显微硬度进行测试。当半导体激光器设置1000 W,近红外光纤激光器设置2000 W,焊接速度10 mm/s时,可将3 mm紫铜焊透,焊缝抗拉强度为182 MPa,达到母材抗拉强度的60%,焊缝中无气孔产生。光纤激光与蓝光半导体激光复合焊接,利用紫铜对蓝光半导体激光器(波长450 nm)吸收率较高的特点,总的激光能量输入较低,能够保持熔池的稳定性,不会产生气孔,同时将3 mm厚的紫铜焊透。The absorption rate of red copper to fiber laser with wavelength was low,only was 4%,required of high power laser to weld,high power was easy to produce defects such as pores.In this paper,the blue light diode and fiber laser were used to weld the red copper with a thickness of 3 mm,and the welding process parameters were optimized.The cross section and micro-structure of fiber laser welding,blue light diode laser welding,blue light diode laser and fiber laser composite welding were compared and analyzed,and the micro hardness of the welds was tested.When the diode laser was 1000 W,the fiber laser was 2000 W,and the welding speed was 10 mm/s,the 3 mm copper can be welded,and the tensile strength of the weld reached to 182 MPa,which was 60%of the tensile strength of the base metal,and there was no porosity in the welds.The composite optical fiber laser welding and blue diode laser welding,used the high absorption rate of copper in wavelength of 450 nm,the total input power was low,which can maintain the stability of the molten pool,and can improve the fluidity of molten pool.No pores would be generated,and the 3 mm thick was penetration welding.

关 键 词：蓝光半导体激光器 近红外光纤激光器 激光焊接 紫铜 

分 类 号：TG456.7[金属学及工艺—焊接]