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为了解决传统焊接工艺(填丝TIG焊)焊接传动轴总成滑移端壳体-法兰存在的焊缝余高太高,造成应力集中;焊缝熔化不均匀、气孔,造成壳体和法兰在传递扭力时脱落;整体焊缝外观成型质量差;焊丝损耗比较大;焊接效率低等问题。采用激光深熔焊接对传动轴总成滑移端壳体-法兰进行焊接,并研究激光焊接后焊缝表面形貌、焊缝宽度和热影响区宽度、焊缝熔深、焊缝余高和焊缝显微硬度。结果表明:激光深熔焊接后,传动轴总成滑移端壳体-法兰焊缝熔化均匀、无气孔等缺陷;焊缝表面形貌美观,热影响区以及焊缝宽度远小于传统工艺焊接时的热影响区及焊缝宽度,焊缝和热影响区的硬度均高于母材,热影响区未出现软化,焊接熔深达到焊接要求,焊缝余高为0.3mm,同时激光焊接效率较高,满足传动轴总成滑移端壳体-法兰的焊接要求。
In order to solve the traditional welding process (wire-filled TIG welding) welded drive shaft assembly slip-side shell - the existence of flange weld flange is too high, resulting in stress concentration; weld uneven melting, porosity, resulting in the shell and the law Blue off when the transfer of torque; the appearance of the overall appearance of poor weld quality; wire loss is relatively large; low welding efficiency and other issues. Laser deep penetration welding was used to weld the shell and flange of transmission shaft assembly. The surface morphology, width of weld and width of heat affected zone after laser welding were also studied. The weld penetration and weld height And weld microhardness. The results show that the shell-flange weld of the drive shaft assembly melts uniformly and has no porosity defects after laser deep penetration welding. The appearance of the weld surface is beautiful, the heat affected zone and the weld width are much smaller than the traditional welding The heat affected zone and weld width, weld and heat affected zone hardness are higher than the base metal, heat affected zone does not appear softening, weld penetration to meet the welding requirements, the remaining weld height of 0.3mm, while the laser welding efficiency Higher, to meet the drive shaft assembly slip shell - flange welding requirements.