【摘要】 分析了TB2钛合金电子束焊接接头的显微组织结构,结合焊接接头的显微硬度分布规律以及力学性能试验结果,分析了焊接接头不同区域的性能。结果表明:TB2钛合金具有良好的可焊性,焊接接头强度系数高于0.95,塑性低于母材,采用炉冷方式可获得较好的延伸率,空冷次之,水冷最差;焊缝区内有弥散α析出的β晶粒,热影响区晶粒长大不是特别明显。焊缝区硬度最高,塑性差,且焊缝热影响区较窄。更多还原

【Abstract】 The microstructure,micro-hardness and tensile properties of TB2 titanium alloy welded joints were studied.The results show that TB2 titanium alloy has good weldability,intensity coefficient of the welded joints is higher than 0.95,the plasticity is lower than that of the base material,the best plasticity is for furnace cooled,air cooled is lower,and water quenched is the worst. The weld is composed of needle α and β phases,the HAZ crystal is not apparent.Rigidity of the weld is the highest and the plasticity is the worst,and the HAZ is thin.更多还原