无针搅拌摩擦点焊技术  

Probeless Friction Stir Spot Welding Technology

作　　者：褚强[1] 李文亚[1] 杨夏炜[1] 王卫兵[2] 

机构地区：[1]西北工业大学材料学院,西安710072 [2]中国搅拌摩擦焊中心,北京100024

出　　处：《焊管》2017年第11期12-17,21,共7页Welded Pipe and Tube

基　　金：国家自然科学基金项目"冷喷涂热冲击与喷丸效应协同诱导高强铝合金搅拌摩擦焊接头强韧化机制及可控性研究"(项目编号51574196);航空科学基金项目"流动摩擦点焊接头形成机理研究"(项目编号20161125002)

摘　　要：为了消除搅拌摩擦点焊固有的"匙孔"缺陷,采用无针搅拌摩擦点焊(probeless friction stir spot welding,P-FSSW)工艺,在不同的焊接参数下对新型铝锂合金2198-T8进行了点焊试验,并分析了点焊接头的金相组织及其力学性能。结果表明,无针搅拌摩擦点焊工艺可以有效消除"匙孔"缺陷,但受工艺限制,无针搅拌摩擦点焊焊接工艺较适用于低熔点合金及薄板焊接。In order to eliminate the keyhole which appeared normally in conventional friction stir sport welding （FSSW） joints, 2198-T8 A1-Li alloy had been taken spot welding by probeless friction stir spot welding （P-FSSW）, and metallographic structure and mechanical property of welded joint were analyzed. The results showed that P-FSSW process could effectively eliminated the keyhole defect, but limited to the process, P-FSSW process applied to low-melting-point alloy and sheet welding.

关 键 词：焊接 搅拌摩擦点焊 微观组织 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]