Study on friction stir welding process performance of 6005A alloy

6005A合金搅拌摩擦焊焊接工艺性能研究 Study on friction stir welding process performance of 6005A alloy 张富亮 ZHANG Fuliang 1 first-author 徐宁 XU Ning 1 王宇 WANG Yu 1 都伟 DU Wei 1 荣光明 RONG Guangming 1 辽宁忠旺集团有限公司 辽宁忠旺集团有限公司 Liaoning Zhongwang Group Co.,Ltd. Liaoning Zhongwang Group Co.,Ltd. 利用搅拌摩擦焊在4种不同的工艺参数下对3 mm厚6005A合金板材进行焊接工艺对比实验。通过对焊缝位置进行力学拉伸、硬度、正向弯曲、宏观金相、微观金相分析,确定最优焊接工艺。研究表明:当摩擦头转速为1 200 r·min -1 、焊接速度为700 mm·min -1 时,拉伸断裂位置出现在热影响区附近且断面呈"颈缩"现象,维氏硬度分布呈"W"形,微观组织存在局部细小S线,力学值高于标准且优于其他三种工艺参数,为生产工艺提供了技术支持。 Friction stir welding（FSW） is used to conduct different welding process contrast experiment of 3 mm thick 6005A alloy plate. Through the mechanical tensile,hardness,forward bending,macro metallographic and micro metallogra-phic analysis of the weld position,the optimal welding process is finally determined. Research shows that when the rotational speed of the friction head is 1 200 r·min -1 and the welding speed is 700 mm ·min -1 ,the mechanical tensile fracture occurs near the heat affected zone and the fracture surface shows "necking" phenomenon,the Vickers hardness distribu-tion is W-shaped,and there are small S-lines in the micro-structure. The mechanical value is higher than the standard and better than the other three welding parameters,which meets the production process requirements and provides technical support for the production process. 6005A铝合金 搅拌摩擦焊 力学 硬度 宏观金相 微观金相 弯曲实验 6005A aluminum alloy friction stir welding mechanics hardness macro metallographic micro metallographic bending test TG453.9 2022-03-08 7 51