摘要
采用电子束焊接的方法对10 mm厚的喷射成形Al-Zn-Mg-Cu合金板进行了拼焊实验。采用金相显微镜、扫描电镜、室温拉伸实验、显微硬度等方法分析了焊接接头的微观组织,测试了焊接接头的力学性能及显微硬度。结果表明,喷射成形Al-Zn-Mg-Cu合金焊接接头由三个区域(近缝区母材,焊核区,热影响区)组成。焊缝宽为0.3～1.0 mm,焊核区由尺寸约3～8μm的等轴细晶组成,析出相沿晶界分布,晶内析出相较少;热影响区大部分保留了母材的原始组织特征,小部分区域发生了重熔。从焊缝区到母材,显微硬度值逐渐下降,焊缝区硬度值高出母材约35。经T6处理后,焊接接头强度约为母材的82%。
The welding experiment was conducted for spray formed Al-Zn-Mg-Cu alloy of 10 mm thickness by electron-beam welds.The microstructure and mechanical properties of the welding joint were investigated using optical microscope,scanning electron micro-scope,tensile test,microhardness etc..The results indicated that the welding joint was comprised of three zones,such as the base metals,nugget,heat affected zone.The weld width was 0.3 ～ 1.0 mm,the weld nugget zone consisted of fine equiaxed grains with the size of...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第4期624-628,共5页
Chinese Journal of Rare Metals
基金
国家重点基础研究发展计划资助项目(2005CB623704)
