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    • 15. 发明授权
    • Steam-turbine power plant and steam turbine
    • 蒸汽轮机发电厂和汽轮机
    • US6123504A
    • 2000-09-26
    • US391945
    • 1995-02-21
    • Masao ShigaRyo HiragaTakeshi OnodaNobuo ShimizuNorio YamadaMitsuo KuriyamaKishio HidakaShigeyoshi NakamuraYutaka FukuiToshio Fujita
    • Masao ShigaRyo HiragaTakeshi OnodaNobuo ShimizuNorio YamadaMitsuo KuriyamaKishio HidakaShigeyoshi NakamuraYutaka FukuiToshio Fujita
    • F01D5/02B23K35/00B23K35/30C21D9/38C22C38/00F01D5/14F01D5/28F01D5/30F01D25/00F01K7/22
    • F01D5/28B23K35/308C21D9/38B23K35/004C21D2211/005
    • A steam turbine includes a rotor shaft, movable blades assembled on the rotor shaft, fixed blades for guiding inflow of steam to the moving blades, and an inner casing for holding the fixed blades. The rotor shaft and at least a first stage of the movable blades are made of high-strength martensitic steel comprising 0.05-0.20(%) of C, at most 0.15(%) of Si, 0.3-0.7(%) of Mn, 9.5-13(%) of Cr, 0.3-0.7(%) of Ni, 0.05-0.35(%) of V, 0.02-0.15(%) of Nb, 0.01-0.06(%) of N, 0.05-0.5(%) of Mo, 1.0-3.5(%) of W, 2-10(%) of Co and 0.0005-0.03(%) of B and at least 78(%) of Fe (the percentages being given in terms of weight). The inner casings is made of martensitic cast steel comprising 0.06-0.16(%) of C, at most 0.5(%) of Si, at most 1(%) of Mn, 0.2-1.0(%) of Ni, 8-12(%) of Cr, 0.05-0.35(%) of V, 0.01-0.15(%) of Nb, 0.01-0.1(%) of N, at most 1.5% of Mo, 1-4(%) of W and 0.0005-0.03(%) of B and at least 85(%) of Fe (the percentages being given in terms of weight). The rotor shaft has a length of at least 5 (m) and has a minimum diameter of at least 600 (mm) at a portion where the fixed blades are assembled. The first stage of said moving blades has a length of at least 35 (mm) at a blade portion thereof.
    • 蒸汽涡轮机包括转子轴,组装在转子轴上的可动叶片,用于引导蒸汽流入活动叶片的固定叶片以及用于保持固定叶片的内壳体。 转子轴和可动刀片的至少第一级由高强度马氏体钢制成,包括0.05-0.20(%)C,最多0.15(%)的Si,0.3-0.7(%)的Mn,9.5 -13(%)Cr,0.3-0.7(%)Ni,0.05-0.35(%)V,0.02-0.15(%)Nb,0.01-0.06(%)N,0.05-0.5(%) 的Mo,1.0-3.5(%)W,2-10(%)Co和0.0005-0.03(%)B和至少78(%)Fe(百分比以重量计)。 内壳由马氏体铸钢制成,包括C:0.06-0.16(%),最多0.5(%)Si,最多1(%)Mn,0.2-1.0(%)Ni,8-12( %),V 0.05〜0.35(%),Nb:0.01-0.15(%),N:0.01-0.1(%),Mo:1.5%以下,W:1-4(%):0.0005〜 B的0.03(%)和Fe的至少85(%)(以重量计)。 转子轴具有至少5(m)的长度,并且在组装固定叶片的部分处具有至少600(mm)的最小直径。 所述活动叶片的第一阶段在叶片部分处具有至少35(mm)的长度。