设计开发了四种不同成分的镍基合金 ,通过扫描电镜 (SEM)、能谱分析 (EDS)和X射线衍射 (XRD)相结合的综合分析手段 ,研究了Cr、Si含量对试验材料组织和相组成的影响 .结果表明 ,当Cr、Si含量适宜时 ,合金可实现碳化物、硼化物和硅化物的复合强化 ,使合金中第二相数量多、分布均匀、硬度高、耐熔盐腐蚀能力强 .在 850℃以下可替代钴基合金 ,有广阔的应用前景 Four kinds of nickel-based alloys with different compositions were designed and developed. The effects of Cr and Si contents on microstructure and mechanical properties of test materials were studied by means of SEM, EDS and XRD. Phase composition.The results show that when Cr and Si contents are suitable, the alloy can be strengthened by carbides, borides and silicides to make the alloy have more second phase, more uniform distribution, high hardness and corrosion resistance to molten salt Strong ability to replace cobalt-based alloy below 850 ℃, has broad application prospects