In this study, TiC/CM247LC nickel-based composite was successfully prepared by selective laser melting, then was heat treated at a solid solution temperature of 1260 °C and different aging temperature of 840 °C, 870 °C, 900 °C and 930 °C respectively. Effects of aging temperatures on the microstructures and mechanical properties were systematically studied. The results show that the microstructures of all the heat treated samples are composed of γ matrix, carbides and γ′ phase. The γ grains remain a columnar shape after treatments, but the size of γ′ phase grows up gradually with the increasing aging temperature. The composite treated at an aging temperature of 870 °C exhibits the best mechanical properties with the tensile strength of 1073 MPa, yield strength of 1004 MPa and elongation of 7.57%. The plastic deformation and strengthening mechanisms of heat treated composite were systematically investigated.

本研究通过选区激光熔化成功制备了TiC/CM247LC镍基复合材料，并在1260℃固溶温度和840℃、870℃、900℃和930℃不同时效温度下进行热处理。分别为°C。系统研究了时效温度对显微组织和力学性能的影响。结果表明，所有热处理样品的显微组织均由γ基体、碳化物和γ '相组成。处理后γ晶粒仍保持柱状，但随着时效温度的升高，γ ′相尺寸逐渐长大。时效温度870 ℃处理的复合材料表现出最佳的力学性能，拉伸强度为1073 MPa，屈服强度为1004 MPa，伸长率为7.57%。系统研究了热处理复合材料的塑性变形和强化机制。