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研究了金属间化合物TAC-1B与钛合金TC11经真空电子束焊接后,在不同规范的热力耦合作用下,焊接界面元素扩散变化趋势和焊缝区的显微组织变化。研究结果表明,直接焊接的试样,焊缝处元素Al、Nb含量发生突然变化;经热力耦合作用后焊缝处元素Al、Nb从浓度高的一侧向浓度低的一侧发生连续的扩散,元素Mo的变化不大。在热模变形20%并经680℃保温12h,空冷处理后的试样,焊接界面显微硬度最高,HV0.98平均值为3853.4MPa。焊缝及焊缝两侧的热影响区内的高倍组织随变形程度增大而逐渐细化。
The variation trend of element diffusion at weld interface and the microstructure of weld zone were investigated under different standard thermal coupling effects after the vacuum electron beam welding of intermetallic compound TAC-1B and titanium alloy TC11. The results show that the content of Al and Nb in the weld seam changes suddenly when the specimen is welded directly. The elements Al and Nb at the weld seam undergo continuous diffusion from the high concentration side to the low concentration side after heat-induced coupling , Little change in elemental Mo. In the 20% hot deformation and 680 ℃ insulation 12h, air-cooled samples, the highest hardness of the welding interface, HV0.98 average 3853.4MPa. High-magnification microstructures in the heat-affected zone on both sides of weld and weld gradually refine with the increase of deformation.