钛合金T-型结构单面焊背面双侧成形焊接接头组织与性能  

Microstructure and Properties of T-structure Joints by Single Pass Welding and Double Backside Shaping on Titanium Alloy

作　　者：王敏[1,2] 杨磊[3] 于瑛 吴林[2] 

机构地区：[1]中国科学院沈阳自动化研究所,沈阳110016 [2]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001 [3]沈阳飞机工业集团有限公司,沈阳110034 [4]沈阳航空大学,沈阳110136

出　　处：《航空材料学报》2012年第1期45-50,共6页Journal of Aeronautical Materials

摘　　要：应用TIG焊、激光-TIG电弧复合焊工艺,采用单面焊背面双侧成形焊接技术对钛合金T-型结构进行焊接。对两种工艺进行金相组织、拉伸、弯曲、疲劳性能对比试验。研究结果表明,激光-TIG电弧复合焊工艺焊接钛合金T-型结构,近缝区及热影响区晶粒长大倾向明显要小于TIG焊接头,激光-TIG电弧复合焊工艺的明显高于TIG焊工艺,复合焊接的疲劳强度相比TIG焊提高约50%。因此,激光-TIG电弧复合焊工艺焊接钛合金T-型结构综合力学性能优于TIG焊接头。T-structure parts of titanium alloy are single pass welded and double backside shaped,respectively by TIG welding and laser-TIG hybrid welding.The microstructure,tensile,bending and fatigue performance of the two methods have been tested comparably.The results show that the tendency of grain growing in the weld vicinity and HAZ is much lesser.The bending strength of laser-TIG hybrid welding is obviously higher than that of TIG welding.The fatigue life of laser-TIG hybrid welding joint is 50% more than that of TIG welding joint.So,the general performance of laser-TIG hybrid welding joint is better than that of TIG welding.

关 键 词：钛合金 T-型结构 复合热源焊接 组织性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]