火焰加热温度对6005A铝合金焊接接头性能的影响  

Effect of Flame Heating Temperature on Properties of Welded Joint of 6005A Aluminium Alloy

作　　者：姜澜[1] 魏绪钧[1] 姚广春[1] 王德全[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2003年第4期365-368,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目 (G19990 64 90 3 )

摘　　要：针对铁路交通车辆用 60 0 5A铝合金型材的焊接变形 ,采用火焰加热方法进行矫正·研究了火焰加热温度对焊接接头抗拉强度、硬度及微观组织结构的影响·实验结果表明 ,当加热温度低于 2 0 0℃时 ,焊接接头的抗拉强度、硬度未降低 ,热影响区内软化区的显微组织未发生明显变化 ;当加热温度超过 2 0 0℃时 ,焊接接头的硬度发生较明显降低现象 。Welding distortion of 6005A aluminium alloy was straightened by flame heating. Effects of temperature on tensile strength, hardness and microstructure of 6005A aluminium alloy welding joint by flame heating were studied. Experimental results showed that tensile strength, hardness and microstructure in soften zone are unchangeable clearly under 200?℃, whereas tensile strength and hardness decreased apparently when the heating temperature is above 200?℃. The decrease of properties in soften zone is due to the overheat, which leads to crystal coarsening during the influence of the straightening heat.

关 键 词：6005A铝合金 焊接接头 加热温度 力学性能 显微组织 软化区 

分 类 号：TG457.14[金属学及工艺—焊接]