中国机械工程Issue(14)：1960-1966,7.DOI:10.3969/j.issn.1004-132X.2014.14.023
10kW级光纤激光厚板焊接表面塌陷的试验研究
Study on Surface Undercut of Laser Welding of Thick Plate with 10 kW Class Fiber Laser
摘要
Abstract
Due to surface undercut in the process of welding of SUS 304 stainless steel plate with 12 mm thickness using high power fiber laser ,the flow of molten pool was captured by a high-speed camera based on“sandwich”method .The influences of the welding orientations ,welding speed and the root hump on the surface undercut were discussed ,and the formation causes of the surface undercut were investigated .The results show that the average depth decreases gradually with varying the weld-ing orientations from horizontal orientation welding to the vertical orientation welding .Moreover ,as the welding speed becoming smaller ,the size of the“shelf”on the keyhole front wall increases and the undercut becomes deeper .With generation of the root hump ,the top molten pool lacks the liquid metal resulting in surface undercut .关键词
激光技术/激光焊接/表面塌陷/厚板/焊接方位/高速摄像Key words
laser technique/laser welding/surface undercut/thick plate/welding orientation/high speed photography分类
矿业与冶金引用本文复制引用
陈根余,周宇,张明军,李时春..10kW级光纤激光厚板焊接表面塌陷的试验研究[J].中国机械工程,2014,(14):1960-1966,7.基金项目
国家自然科学基金资助项目（51175165），国家科技重大专项 （）
