论文部分内容阅读
为了获得在汽车工业中具有广泛应用前景的Al/Zn复合构件,采用搅拌摩擦焊的方法以3 mm厚2A14铝合金和加工态纯锌为试验材料,研究了其焊接接头的力学性能及微观组织结构。结果表明:当搅拌头旋转速度为500r/min、焊接速度为70 mm/min时,能获得焊缝成形良好、界面成“双钩状”的对接接头,此时接头抗拉强度达到最大值152.7 MPa,为母材锌的80.4%。钩状区铝合金和锌充分混合,出现局部洋葱环、冲击平原等形貌,且区域中形成了不同固溶体,固溶体类型从锌侧向铝侧由锌基固溶体向铝基固溶体转变。
In order to obtain the Al / Zn composite component with wide application prospects in the automotive industry, the friction stir welding method was used to study the mechanical properties and microstructure of welded joints with 3 mm thick 2A14 aluminum alloy and pure processed zinc structure. The results show that when the rotation speed of the stirring head is 500r / min and the welding speed is 70mm / min, the butt joint with good weld formation and “double hook” interface can be obtained, and the joint tensile strength reaches the maximum 152.7 MPa, 80.4% of base metal zinc. The hook-shaped aluminum alloy and zinc are well mixed, the appearance of local onion rings and impact plain appear, and different solid solutions are formed in the area. The solid solution type changes from zinc-based solid solution to aluminum-based solid solution from the zinc side to the aluminum side.