采用嵌入式系统的精密铸造工艺制备了Ni-20Cr-8Mo-0.5Nb-0.5V镍基合金,并进行了显微组织、物相组成、力学性能和耐腐蚀性能的测试与分析。结果表明,该工艺制备的合金组织致密均匀、无明显粗大第二相,它由Ni基固溶体和少量的Ni3Mo第二相组成;在室温、200和600℃的抗拉强度分别为759、757、753 MPa,腐蚀电位较常规精密铸造工艺正移0.319 V。 Ni-20Cr-8Mo-0.5Nb-0.5V Ni-based alloy was prepared by the precision casting process of embedded system. The microstructure, phase composition, mechanical properties and corrosion resistance of Ni-20Cr-8Mo-0.5Nb-0.5V alloy were tested and analyzed. The results show that the microstructure of the alloy is dense and homogeneous with no obvious coarse second phase, which consists of Ni-based solid solution and a small amount of Ni3Mo second phase. At room temperature, the tensile strengths at 200 and 600 ℃ are 759 and 757, 753 MPa, corrosion potential than the conventional casting process positive shift 0.319 V.