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水冷核动力堆特殊的环境要求堆内零件具有良好的耐腐蚀性和表面耐磨性以满足其使用条件。不锈钢、镍基合金等耐蚀合金具有优良的耐腐蚀性能但硬度、耐磨性较差,对其在低温环境下进行表面渗氮或渗碳处理,在表面形成一种硬度高、耐磨性好和耐蚀性能好的过饱和的晶格畸变的S-相,可以满足其在反应堆内的应用。本文介绍了气体低温表面处理、等离子低温表面处理和盐浴低温表面处理3种工艺方法的发展和应用前景,并从S-相的组织结构、表面硬度、耐磨性和耐蚀性能方面进行分析与评价。
Water-cooled nuclear power reactor special environment requires heap parts have good corrosion resistance and surface wear to meet their conditions of use. Corrosion resistant alloys such as stainless steel and nickel base alloy have excellent corrosion resistance but hardness and wear resistance are poor. They are subjected to surface nitriding or carburizing treatment at a low temperature, forming a high hardness and wear resistance on the surface Good and good corrosion resistance supersaturated lattice distortion of the S-phase, to meet its application in the reactor. This paper introduces the development and application prospect of three technological methods: gas cryogenic surface treatment, plasma cryogenic surface treatment and salt bath cryogenic surface treatment, and analyzes the microstructure, surface hardness, wear resistance and corrosion resistance of S-phase And evaluation.