空间推进系统铝合金组件激光焊阈值特性  

Characteristics of Threshold of Laser Welding for Aluminum Alloy Components in Space Propulsion System

作　　者：宋凡 马纪龙 周宇浩 曹丹 林嘉伟 SONG Fan;MA JiLong;ZHOU YuHao;CAO Dan;LIN JiaWei(Shanghai Institute of Space Propusion,Shanghai 201112;Shanghai Engineering Research Center of Space Engine,Shanghai 201112)

机构地区：[1]上海空间推进研究所,上海201112 [2]上海空间发动机工程技术研究中心,上海201112

出　　处：《宇航材料工艺》2022年第3期62-67,共6页Aerospace Materials & Technology

摘　　要：为解决空间推进系统直属组件轻量化需求,对新采用的铝合金材料进行了激光焊阈值特性研究。结果表明,铝合金激光焊阈值区间与焊接速度和离焦量的绝对值正相关,但正向变化幅度远低于不锈钢、镍合金和钛合金等材料。对于光束质量不同的激光焊机来说,光束的焦斑直径越小,实焦焊时阈值区间越低;光束的发散角越小,相同离焦量下阈值区间越低。在-12°~12°内,铝合金激光焊阈值区间与入射角无关。保护气的吹送方向和吹送速度基本不改变铝合金激光焊的阈值区间,此特性与不锈钢等材料略有区别。Based on the aluminum alloy components in the space propulsion system,the characteristics of threshold of laser welding are studied.Results show that the threshold interval of laser welding for aluminum alloy is positively correlated with the welding speed and the absolute value of defocus,but the magnitude of the positive change is much lower than that of stainless steel,nickel alloy and titanium alloy.For laser welders with different beam qualities,the smaller the focal spot diameter of the beam,the lower the threshold interval during real-focus welding;the smaller the divergence angle of the beam,the lower the threshold interval under the same defocus amount.In the range of-12°to 12°,the threshold interval of laser welding for aluminum alloy has nothing to do with the incident angle.The blowing direction and blowing speed of shielding gas basically do not change the threshold interval of laser welding for aluminum alloy,which is different from stainless steel.

关 键 词：铝合金 激光焊 匙孔 阈值区间 工艺参数 

分 类 号：TG456.[金属学及工艺—焊接]