拘束控制铝合金焊接面外变形行为分析  

Investigation of out-of-plane welding distortion in aluminum alloy welding with external restraint

作　　者：肖晓明[1] 彭云[1] 张建勋[2] 裴怡[2] 田志凌[1] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《焊接学报》2011年第5期33-36,114,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50875200);博士点基金资助项目(20070698088)

摘　　要：利用温度和变形实时测量系统,对5A12铝合金板拘束焊变形和外拘束力进行了试验研究,分析了拘束力大小和拘束释放对试板面外变形的影响.结果表明,施加不同的拘束力,试板焊后残余面外变形大小不同,适当的拘束可以有效地控制焊接变形;焊接结束拘束卸载后,焊接件变形出现不同程度的反弹;弹性回复是造成拘束焊残余变形的主要因素;拘束力大小为0.2 kN,采用对称面压紧的方式,拘束位置距焊缝中心45mm,厚度为6 mm的5A12铝合金试板残余变形最小.The characteristics of constraint force and dynamic welding distortion of aluminum alloy 5A12 with constraint TIG welding were investigated by dynamic temperature and distortion measuring system.The effects of constraint force and its release on out-of-plane welding distortion were analyzed.Research results show that out-of-plane welding distortion is different with the different constraint force,and welding distortion can be controlled by the proper constraint force.the welding distortion will rebound to some extent after the constraint force being released,which is the main factor to result in the residual distortion of constraint welding;the residual distortion of 6 mm thick aluminum alloy 5A12 plate can be well restrained at the constraint force of 0.2 kN,and the loading position is 45 mm form the centerline of weld.

关 键 词：铝合金 变形 拘束力 弹性回复 

分 类 号：TG115.28[金属学及工艺—物理冶金]