700℃超超临界电站用高中压转子是汽轮机中的核心部件，高中压汽轮机转子材料的选择是当前的研究热点。新型铁素体系和奥氏体系耐热钢的研发促进了600℃超超临界火力发电机组的建设，而铁素体系和奥氏体系耐热钢已经不适用于700℃超超临界电站中高温部件的制造，必须考虑采用镍基耐热合金。文章着重分析了700℃超超临界汽轮机转子用耐热合金的技术特点，介绍了欧洲、美国和日本在700℃超超临界汽轮机转子耐热合金的研发和工业制造方面所取得的最新进展，讨论了中国700℃超超临界汽轮机转子耐热合金的发展趋势。
The high pressure and intermediate pressure turbine rotor are the core components of 700 ℃ USC power plants. Many researchers are focusing on the candidates material used for HP and IP rotor. New developed ferritic and aus-tenitic heat resistant steels promotes the construction of 600℃ USC power plants. But ferritic and austenitic steels can't be used for high temperature components of 700℃ USC plants,and nickel based alloy must be considered. The technologi-cal characteristics of heat resistant alloy used for 700℃USC steam turbine rotor were introduced. The latest research re-sults on material selection and commercial manufacture in Europe,America and Japan was reviewed. Moreover,the de-velopment of heat resistant alloy for 700℃ USC turbine rotor in China was discussed.
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