铝锂合金FSW焊接接头性能  

Research on properties of FSW joint of aluminum lithium alloy

作　　者：佟建华[1] 张坤[1] 林松[1] 王卫兵[1] 栾国红[1] 

机构地区：[1]中航工业北京航空制造工程研究所,北京100024

出　　处：《电焊机》2015年第5期95-98,共4页Electric Welding Machine

摘　　要：研究2060铝锂铝合金FSW焊接接头性能,采用光学显微镜、SEM等手段分析2060铝锂合金的微观组织、拉伸性能、显微硬度、断口形貌等性能,结果表明:在用FSW焊接2060铝锂合金过程中,当转速升高时,焊核区硬度升高;当焊速升高时,焊核区硬度基本不变,但热影响区硬度最低点向远离焊核区中心的方向移动;较高的焊接速度下(200 mm/min),随转速增加,接头强度逐渐升高,强度系数最高可达到89%;在较低焊接速度下(80 mm/min),随转速的增加,接头强度最高可达母材的87%,延伸率为10%;当转速较低时,断口呈层状结构;当转速较高时,断口出现小的韧窝。The FSW joint properties of 2060 aluminum lithium alloy are investigated. By optical microscope,SEM and other means,the microstructure,tensile properties,microhardness,fracture morphology and other properties of 2060 aluminum lithium alloy are researehed. The results show that in the FSW process of 2060 aluminum lithium alloy,as rotation speed increases,the hardness of weld nugget zone enhances. When the welding speed increases, the hardness of the weld nugget zone basically does not change, hut the lowest point of hardness of heat affected zone moves in the direction of away from the center of the weld nugget zone. When welding speed is 200,nm/min,as the rotation speed increases,the joint strength gradually enhances,and the highest strength coefficient can reach 89% of base metal; when welding speed is 80mm/min,the highest strength coefficient can reaeh 87% of base metal,and the elongation reaches 10%. When the rotation speed is low, the fracture is layered structure. When the rotation speed is high, small dimples occur.

关 键 词：2060铝锂合金 FSW焊接接头 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]