ZTC4钛合金氩弧焊补焊工艺及组织性能研究  

Processing and microstructure properties of ZTC4 joints using TIG technology

作　　者：孙兵兵[1] 郭绍庆[1] 肇恒跃 陈冰清[1] 李胜男[1] 

机构地区：[1]中国航空工业集团公司北京航空材料研究院,北京100095 [2]驻沈飞工业集团公司军代表室,辽宁沈阳110034

出　　处：《电焊机》2016年第7期98-100,115,共4页Electric Welding Machine

摘　　要：针对ZTC4钛合金铸件中出现的裂纹、夹杂等铸造缺陷,对其进行氩弧焊补焊工艺及接头组织性能评价研究。研究发现,补焊后的试板未发现气孔、裂纹等缺陷,焊缝组织由大量针状α′和β相组成;采用焊前预热和焊后热处理能最大程度地减小焊接残余拉应力,防止焊接裂纹的产生;预热焊接+热处理接头的室温拉伸性能最好,与母材相当,室温冲击性能超过母材。In the paper,for crack and inclusions in the ZTC4 titanium alloy casting,the arc welding repair technology was studied,the microstructure and properties of the joints were analyzed. The study found that,there were not pores and cracks in the joints,the weld microstructure mainly consisted of mass of acicular α ＇ and β phase;it could mostly decrease residual tensile stress with preheating and heat treatment after welding, in order to prevent crack generation; tensile strength at room temperature of the joints with preheating and heat treatment after welding was best and was equal to base metal, the impact toughness was higher than base metal.

关 键 词：ZTC4 氩弧焊补焊 接头组织性能 残余应力 

分 类 号：TG444.74[金属学及工艺—焊接]