316L不锈钢超薄板激光焊接工艺试验研究  

Experimental Study on Laser Welding Process of Ultra Thin 316L Stainless Steel

作　　者：杜祥永[1] 彭林法[1] 易培云[1] 来新民[1] 

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《热加工工艺》2015年第19期17-20,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51235008;51275294;51121063)

摘　　要：厚度为0.1mm的超薄金属板在薄壁板式换热器、燃料电池极板等能源、制冷行业中应用广泛,激光焊接是这类零件主要的连接工艺。由于厚度仅有0.1 mm,传统的多模光纤激光光斑较大,热输入不够集中,会造成构件焊后变形过大,影响构件质量。本文通过单模与多模激光焊接0.1 mm厚316L不锈钢超薄板工艺对比试验,探究了单模激光器焊接316L不锈钢超薄板的可行性,以及单模激光焊接的优势。结果表明,单模光纤激光器在功率为40 W时便可以实现对316L不锈钢金属超薄板的有效连接,同时焊缝熔宽更窄,焊接变形量变小。Laser welding is the most effective joining method for thin 316L plate which is widely used in thin-walled components such as bipolar plates and plate heat exchanger. Traditionally, the multi mode fiber laser is adopted to weld the thin plates to form fluid field. However, the excessive welding heat usually produces severe distortions because the divergence angle of multi mode fiber laser is not tiny enough. The single mode fiber laser beam with smaller divergence angle was used to weld 0.1mm thick 316L plate. It＇s found that single mode fiber laser can join BPPs effectively with narrower weld width, deeper penetration and smaller distortion.

关 键 词：316L不锈钢 超薄金属板 单模激光 多模激光 焊接工艺 

分 类 号：TG456.7[金属学及工艺—焊接]