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    • 3. 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。
    • 10. 发明授权
    • Steam turbine power-generation plant and steam turbine
    • 蒸汽轮机发电厂和汽轮机
    • US6129514A
    • 2000-10-10
    • US125206
    • 1998-08-13
    • Masao ShigaTakeshi OnodaShigeyoshi NakamuraYutaka Fukui
    • Masao ShigaTakeshi OnodaShigeyoshi NakamuraYutaka Fukui
    • C22C38/44C22C38/46F01D5/28F01D1/02
    • F01D5/28C22C38/44C22C38/46
    • A compact steam turbine power-generation plant has a compact steam turbine that operates at a high temperature in a range of 600 to 660.degree. C. Ferrite based heat resisting steels provide for thermal efficiency. The main steam temperature and the reheated steam temperature can be set in a range of 600 to 660.degree. C. by making the main parts exposed to the high temperature atmosphere, such as the rotor shaft, from ferrite based forged steels and cast steels and by making a final stage blade of a low pressure turbine from a martensite steel. The final stage blade is made from a ferrite based forged steel having a tensile strength of 120 kgf/mm.sup.2 or more; the rotor shaft is made from a ferrite based forged steel having a 10.sup.5 h creep rupture strength of 11 kgf/mm.sup.2 or more; and the inner casing is made from a ferrite based cast steel having a 10.sup.5 h creep rupture strength of 10 kgf/mm.sup.2 or more.
    • PCT No.PCT / JP96 / 00336 Sec。 371日期1998年8月13日 102(e)1998年8月13日PCT PCT 1996年2月16日PCT公布。 公开号WO97 / 30272 日期1997年8月21日紧凑型蒸汽轮机发电厂有一台紧凑型蒸汽轮机,工作温度范围在600至660℃之间。铁素体耐热钢可提供热效率。 主蒸汽温度和再热蒸汽温度可以设定在600至660℃的范围内,通过使主要部件暴露于诸如转子轴的高温气氛中,从铁素体锻造钢和铸钢以及通过 从马氏体钢制成低压涡轮机的末级叶片。 末级叶片由抗拉强度为120kgf / mm2以上的铁素体型锻钢制成, 转子轴由105h蠕变断裂强度为11kgf / mm2以上的铁素体锻造钢制成, 并且内壳由具有105kg蠕变断裂强度为10kgf / mm 2以上的铁素体铸钢制成。