以TC17合金锻件为基材,采用激光修复工艺方法,在其上沉积TC11合金粉末,制备TC17-TC11双合金修复试样,在双合金界面处靠近TC17锻件基体一侧观察到一定深度的热影响区。通过调整激光修复工艺参数(激光功率、扫描速度、送粉率),构造不同深度的热影响区,探讨热影响区深度对激光修复试样高温拉伸性能的影响。研究结果表明,高温拉伸时,修复试样表现为滑移分离型断裂,由于α/β两相的应变不协调,拉伸时裂纹萌生于TC11合金α/β相界面,其中热影响区深度为5 mm修复试样的强度和塑性匹配度好。随着热影响区深度的增加,修复试样的强度值呈现先升后降的趋势,热影响区深度为2 mm修复试样的抗拉强度最大,但其塑性较差。 TC17 alloy forgings as the substrate, the use of laser repair process, TC11 alloy powder deposited on it, prepared TC17-TC11 double alloy repair samples, the interface near the TC17 forgings substrate side of a certain depth of thermal effects were observed Area. By adjusting laser process parameters (laser power, scanning speed and powder feeding rate), heat affected zones of different depths were constructed to investigate the effect of heat affected zone depth on high temperature tensile properties of laser repaired specimens. The results show that at high temperature, the repaired sample shows slip separation fracture. Because of the uncoordinated strain of α / β phase, the crack initiation occurs at the α / β phase interface of TC11 alloy during stretching, in which the depth of heat affected zone 5 mm to repair the sample strength and good plasticity match. With the increase of the heat affected zone depth, the strength of the repaired sample tends to increase first and then decrease. The depth of the heat affected zone is 2 mm. The tensile strength of the repaired sample is the highest but the plasticity is poor.