7A52铝合金便携式搅拌摩擦焊接头的组织与性能分析  

Structure and Property Investigation of Portable Friction Stir Welding of 7A52 Aluminum Alloy

作　　者：李奇[1] 赵军军[1] 张平[1] 曾庆强[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室

出　　处：《装甲兵工程学院学报》2010年第4期73-76,共4页Journal of Academy of Armored Force Engineering

基　　金：国家自然科学基金资助项目(50801066);国防科技重点实验室基金资助项目(9140C8504030809)

摘　　要：采用便携式搅拌摩擦焊设备,对3mm厚的7A52铝合金薄板进行了焊接,对焊接头的显微组织和机械性能进行了观察测试。研究结果表明:焊接头可分为动态再结晶区、热-机影响区和母材3个区域,而没有明显的热影响区。动态再结晶区组织发生再结晶,生成细小的等轴晶粒;热-机影响区有塑性变形流线,且范围较窄;母材区保持着原来的轧制组织。接头硬度的最薄弱环节在热-机影响区。接头抗拉强度达到母材的70%左右,能够满足战场应急抢修的需求。A portable friction stir welding device is used to weld 7A52 aluminum alloy plate of 3 mm thin.The structure and mechanical property of welded joint are analyzed.The results show the welded joint can be divided into three regions as follows:the dynamically recrystallized zone,the thermo-mechanically affected zone and the base metal.There is no distinct heat affected zone.Dynamic recrystallization takes place in the dynamically recrystallized zone and fine grains are achieved.There are plastic deformation st...

关 键 词：便携式搅拌摩擦焊 焊接接头 焊接组织 显微硬度 抗拉强度 

分 类 号：TG453.9[金属学及工艺—焊接]