摘要
使用搅拌摩擦焊对1060铝合金和T2紫铜进行焊接,研究了工艺参数对焊缝成型、接头的微观组织及力学性能的影响。结果表明:当转速为1200~1800 r/min,焊接速度为80~120 mm/min时,可以获得表面成型良好的铜/铝接头。金相分析表明,在温度较高的焊核区组织发生了明显的动态再结晶,并形成细小的等轴晶粒,而温度较低的焊缝过渡区出现片层状与旋涡状的混合结构。显微硬度分析表明,焊核区与铜、铝母材的过渡部分发生了不同程度的软化。拉伸性能分析表明,在焊接工艺参数合适的情况下,平行于板材轧制方向的焊缝抗拉强度比垂直于板材轧制方向的焊缝高。
The 1060 aluminum alloy and T2 copper were successfully welded by using friction stir welding, and the effects of process parameters on the weld forming, mechanical properties and microstructure of the joints were also investigated. The results show that when the rotational speed is 1200 - 1800 r/min, and the welding speed is 80-120 mm/min, the Cu/Al joint with good surface forming can be obtained. The metallographic analysis shows that the microstructure of weld nugget zone with higher temperature has obvious dynamic recrystallization, and it forms fine equiaxed grains. However, the lamellar and eddy mixed structure is observed at the weld＇s transition zone with low temperature. The microhardness analysis shows that the transition area between weld nugget zone and Cu, A1 base metals has different degree of softening. The tensile properties analysis shows that under proper welding parameters, the tensile strength of the welding seam parallel to the plate＇s rolling direction is higher than that of the welding seam perpendicular to the plate＇s rolling direction.
出处
《热加工工艺》
CSCD
北大核心
2017年第19期32-35,40,共5页
Hot Working Technology
基金
工信部民机科研专项项目(MIZ-2015-036)
关键词
铜/铝异种金属
搅拌摩擦焊
轧制方向
显微组织
力学性能
Cu/Al dissimilar metal
fiiction stir welding
rolling direction
microstructure
mechanical properties
