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...
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)
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
portable friction stir welding
welded joint
welded structure
microhardness
tensile strength
