【摘要】 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 ,有广阔的应用前景更多还原

【Abstract】 Four kinds of Ni based superalloy with different chemical composition have been designed and developed. The effect of concentration of chromium and silicon on microstructure and phase of testing materials was investigated in detail by means of scanning electron microscopy and X ray diffraction analysis.The results showed that the strengthen with carbide、silicate and boraide has been realized by adding proper concentration of chromium and silicon.A lot of secondary phases distribuled homogeneously in structure of high Cr-Si containing alloys which have high hardness and strong capability of corrosion resistance.The alloy can replace Co based alloy and has broad prospects for application.更多还原