(1. 哈爾濱工業(yè)大學(xué) 現(xiàn)代焊接生產(chǎn)技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，
哈爾濱 150001；
2. 北京航空工藝研究所， 北京 100024)
摘 要: 采用攪拌摩擦焊接法焊接了鎂合金AZ31， 研究了焊接參數(shù)對(duì)焊接接頭微觀組織和顯微硬度的影響。結(jié)果表明： 焊接接頭成形良好， 焊縫沒有氣孔、 裂紋和夾渣， 焊縫區(qū)的顯微硬度比母材稍有降低， 但降低幅度不大。
關(guān)鍵字: 攪拌摩擦焊； 鎂合金； 顯微組織； 顯微硬度
（1. State Key Lab of Advanced Welding Production Technology,
Harbin Institute of Technology, Harbin 150001, China;
2. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China）
Abstract:AZ31 magnesium alloy was welded by friction stir welding(FSW), and the changes of microstructure and micro-hardness caused by different welding parameters were also studied. The results indicate that good joints without porosity, crack and dregs are obtained and micro hardness in nugget zone is a little lower than the parent metal.
Key words: friction stir welding; magnesium alloy; microstructure; micro-hardness
