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1. 发明授权

US6123504A Steam-turbine power plant and steam turbine 失效
标题翻译：蒸汽轮机发电厂和汽轮机
公开(公告)号：US6123504A
公开(公告)日：2000-09-26
申请号：US391945
申请日：1995-02-21
申请人： Masao Shiga , Ryo Hiraga , Takeshi Onoda , Nobuo Shimizu , Norio Yamada , Mitsuo Kuriyama , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Toshio Fujita
发明人： Masao Shiga , Ryo Hiraga , Takeshi Onoda , Nobuo Shimizu , Norio Yamada , Mitsuo Kuriyama , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Toshio Fujita
IPC分类号： F01D5/02 , B23K35/00 , B23K35/30 , C21D9/38 , C22C38/00 , F01D5/14 , F01D5/28 , F01D5/30 , F01D25/00 , F01K7/22
CPC分类号： F01D5/28 , B23K35/308 , C21D9/38 , B23K35/004 , C21D2211/005
摘要： 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.
摘要翻译：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。

2. 发明授权

US5961284A High strength heat resisting cast steel, steam turbine casing, steam turbine power plant and steam turbine 失效
标题翻译：高强度耐热铸钢，汽轮机外壳，汽轮机发电厂和汽轮机
公开(公告)号：US5961284A
公开(公告)日：1999-10-05
申请号：US701701
申请日：1996-08-22
申请人： Mitsuo Kuriyama , Masao Shiga , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Ryo Hiraga , Nobuo Shimizu , Masao Kawakami
发明人： Mitsuo Kuriyama , Masao Shiga , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Ryo Hiraga , Nobuo Shimizu , Masao Kawakami
IPC分类号： F01D25/24 , C22C38/00 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54 , F01D1/02 , B63H1/26 , C22C38/18
CPC分类号： C22C38/46 , C22C38/001 , C22C38/44 , C22C38/48 , C22C38/54 , F05B2220/301
摘要： A steam turbine has main components such as rotor shaft exposed to high temperature and intermediate pressure, which are made of a ferritic steel and the main steam temperature and the re-heat steam temperature are 610.degree. C. to 660.degree. C., and a steam turbine power plant employs the turbine. Further, the rotating blades are made of only a martensitic steel or a combination of the martensitic steel and a Ni base alloy, the turbine rotor is made of a ferritic forged steel having a creep rupture strength at the operating temperature for 100 thousands hours of above 15 kg/mm.sup.2, and the casing is made of a ferritic cast steel having a creep rupture strength at the operating temperature for 100 thousands hours of above 10 kg/mm.sup.2.
摘要翻译：蒸汽轮机主要部件如高温和中压的转子轴由铁素体钢制成，主蒸汽温度和再热蒸汽温度为610℃至660℃，蒸汽轮机发电厂采用涡轮机。此外，旋转叶片仅由马氏体钢或马氏体钢和镍基合金的组合制成，涡轮转子由铁素体锻造钢制成，在工作温度下具有蠕变断裂强度为10万小时以上 15kg / mm2，外壳由在10kg / mm2以上10万小时的工作温度下的蠕变断裂强度的铁素体铸钢制成。

3. 发明授权

US5008072A Heat resistant steel and gas turbine components composed of the same 失效
标题翻译：耐热钢和燃气轮机组成的组件相同
公开(公告)号：US5008072A
公开(公告)日：1991-04-16
申请号：US352472
申请日：1989-05-16
申请人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Soichi Kurosawa , Katsumi Iijima , Nobuyuki Iizuka , Yosimi Maeno , Shintaro Takahashi , Yasuo Watanabe , Ryo Hiraga
发明人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Soichi Kurosawa , Katsumi Iijima , Nobuyuki Iizuka , Yosimi Maeno , Shintaro Takahashi , Yasuo Watanabe , Ryo Hiraga
IPC分类号： C22C38/44 , C22C38/46
CPC分类号： C22C38/46 , C22C38/44 , Y10S60/909
摘要： A heat resistant steel of the present invention contains 0.05 to 0.2 wt. % of C, less than 0.5 wt. % of Si, less than 0.6 wt. % of Mn, 8 to 13 wt. % of Cr, 1.5 to 3 wt. % of Mo, 2 to 3 wt. % of Ni, 0.05 to 0.3 wt. % of V, 0.02 to 0.2 wt. % in total of either or both of Nb and Ta, 0.02 to 0.1 wt. % of N and the balance substantially Fe. Since a gas turbine of the present invention is constituted by members, such as discs, blades, shafts and so forth, made of alloys of this kind, the gas turbine has a structure in which it is possible to achieve a high level of creep rupture strength and Charpy impact value.

4. 发明授权

US06224334B1 Steam turbine, rotor shaft thereof, and heat resisting steel 失效
标题翻译：蒸汽轮机，转子轴和耐热钢
公开(公告)号：US06224334B1
公开(公告)日：2001-05-01
申请号：US08780441
申请日：1997-01-08
申请人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
发明人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
IPC分类号： F01D528
CPC分类号： F01D5/147 , C21D9/38 , C21D2211/002 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/141 , F01D5/28 , F01D5/288 , F05D2300/133 , F05D2300/171
摘要： A steam turbine comprising a rotor shaft integrating high and low pressure portions provided with blades at the final stage thereof having a length not less than 30 inches, wherein a steam temperature at first stage blades is 530° C., a ratio (L/D) of a length (L) defined between bearings of the rotor shaft to a diameter (D) measured between the terminal ends of final stage blades is 1.4 to 2.3. This rotor shaft is composed of heat resisting steel containing by weight 0.15 to 0.4% C, not more than 0.1% Si, 0.05 to 0.25% Mn, 1.5 to 2.5% Ni, 0.8 to 2.5% Cr, 0.8 to 2.5% Mo and 0.15 to 0.35% V and, further, the heat resisting steel may contain at least one of Nb, Ta, W, Ti, Al, Zr, B, Ca, and rare earth elements.
摘要翻译：一种蒸汽轮机，包括集成高压部分和低压部分的转子轴，所述转子轴在其最后阶段具有不小于30英寸的长度，其中第一级叶片处的蒸汽温度为530℃，比率（L / D 限定在转子轴的轴承之间的长度（L）与在最终级叶片的末端之间测量的直径（D）为1.4至2.3。该转子轴由含有0.15〜0.4％C，0.1％以下的Si，0.05〜0.25％的Mn，1.5〜2.5％的Ni，0.8〜2.5％的Cr，0.8〜2.5％的Mo和0.15重量的耐热钢构成。至0.35％V，此外，耐热钢可以含有Nb，Ta，W，Ti，Al，Zr，B，Ca和稀土元素中的至少一种。

5. 发明授权

US06174132B1 Steam-turbine power plant and steam turbine 失效
标题翻译：蒸汽轮机发电厂和汽轮机
公开(公告)号：US06174132B1
公开(公告)日：2001-01-16
申请号：US09075770
申请日：1998-05-11
申请人： Masao Shiga , Ryo Hiraga , Takeshi Onoda , Nobuo Shimizu , Norio Yamada , Mitsuo Kuriyama , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Toshio Fujita
发明人： Masao Shiga , Ryo Hiraga , Takeshi Onoda , Nobuo Shimizu , Norio Yamada , Mitsuo Kuriyama , Kishio Hidaka , Shigeyoshi Nakamura , Yutaka Fukui , Toshio Fujita
IPC分类号： F02C300
CPC分类号： F01D5/28 , B23K35/004 , B23K35/308 , C21D9/38 , C21D2211/005
摘要： A steam turbine in which principal components to be exposed to high temperatures are all made of ferritic steel, whereby the temperatures of main steam and reheat steam can be increased to 610-660 (° C.). The rotor shaft (23 in FIG. 1) of the steam turbine is made of ferritic forged steel whose 100,000-hour creep rupture strength is at least 15 (kg/mm2) at the service temperature of the rotor shaft. Likewise, the casing (18) is made of ferritic cast steel whose 100,000-hour creep rupture strength is at least 10 (kg/mm2). The steam turbine of high thermal efficiency can be applied to a steam-turbine power plant.
摘要翻译：一个蒸汽轮机，其主要部件暴露在高温下均由铁素体钢制成，主蒸汽和再热蒸汽的温度可以提高到610-660（℃）。蒸汽轮机的转子轴（图1中的23）由铁素体锻钢制成，其在转子轴的使用温度下的100,000小时蠕变断裂强度为至少15（kg / mm 2）。同样，壳体（18）由铁素体铸钢制成，其100,000小时蠕变断裂强度至少为10（kg / mm2）。具有高热效率的蒸汽轮机可以应用于蒸汽轮机发电厂。

6. 发明授权

US5536146A Combined generator system 失效
标题翻译：组合发电机系统
公开(公告)号：US5536146A
公开(公告)日：1996-07-16
申请号：US305186
申请日：1994-09-13
申请人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
发明人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
IPC分类号： C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/14 , F01D5/28 , F01D7/00
CPC分类号： F01D5/147 , C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/141 , F01D5/28 , F01D5/288 , C21D2211/002 , F05D2300/133 , F05D2300/171
摘要： The present invention relates to a steam turbine comprising a rotor shaft integrating high and low pressure portions provided with blades at the final stage thereof having a length not less than 30 inches, wherein a steam temperature at first stage blades is 530.degree. C., a ratio (L/D) of a length (L) defined between bearings of the rotor shaft to a diameter (D) measured between the terminal ends of final stage blades is 1.4 to 2.3. This rotor shaft is composed of heat resisting steel containing by weight 0.15 to 0.4% C, not more than 0.1% Si, 0.05 to 0.25% Mn, 1.5 to 2.5% Ni, 0.8 to 2.5% Cr, 0.8 to 2.5% Mo and 0.15 to 0.35% V and, further, the heat resisting steel may contain at least one of Nb, Ta, W, Ti, Al, Zr, B, Ca, and rare earth elements.
摘要翻译：汽轮机技术领域本发明涉及一种蒸汽涡轮机，其特征在于，包括转子轴，该转子轴在其最后阶段集成有高压部分和低压部分，叶片长度不小于30英寸，其中第一级叶片的蒸汽温度为530℃，在转子轴的轴承之间限定的长度（L）与最终级叶片的末端之间测量的直径（D）的比（L / D）为1.4至2.3。该转子轴由含有0.15〜0.4％C，0.1％以下的Si，0.05〜0.25％的Mn，1.5〜2.5％的Ni，0.8〜2.5％的Cr，0.8〜2.5％的Mo和0.15重量的耐热钢构成。至0.35％V，此外，耐热钢可以含有Nb，Ta，W，Ti，Al，Zr，B，Ca和稀土元素中的至少一种。

7. 发明授权

US06493936B2 Method of making steam turbine blade 有权
标题翻译：制造汽轮机叶片的方法
公开(公告)号：US06493936B2
公开(公告)日：2002-12-17
申请号：US09766978
申请日：2001-01-23
申请人： Hiroyuki Doi , Mitsuo Kuriyama , Shigeyoshi Nakamura , Shinya Imano , Takeshi Onoda
发明人： Hiroyuki Doi , Mitsuo Kuriyama , Shigeyoshi Nakamura , Shinya Imano , Takeshi Onoda
IPC分类号： B23P1500
CPC分类号： C22C14/00 , C22C38/44 , C22C38/46 , C22C38/52 , C22F1/183 , F01D5/28 , F05D2220/31 , F05D2300/133 , Y10T29/49336 , Y10T29/49339
摘要： A steam turbine blade made of Ti-base alloy comprising an &agr;+&bgr; type phase in which a difference of a tensile strength is small between a blade portion and a dovetail portion, a tensile strength at a room temperature of the dovetail portion is equal to or more than 100 kg/mm2 and a suitable toughness is commonly provided together with a strength, as a steam turbine blade having a length of 43 inch or more, a method of manufacturing the same, a steam turbine power generating plant and a low pressure steam turbine. In the steam turbine blade having a blade portion and a plurality of fork type dovetails, wherein the blade is made of Ti-base alloy structured such that a length of the blade portion is equal to or more than 52 inches with respect to a rotational speed 3000 rpm of the blade or equal to or more than 43 inches with respect to the rotational speed 3600 rpm, and a tensile strength at a room temperature of the dovetail is equal to or more than 100 kg/mm2, preferably equal to or more than 110 kg/mm2 and equal to or more than 96 % of the tensile strength at the room temperature of the blade portion.
摘要翻译：一种由钛基合金制成的汽轮机叶片，其包括在叶片部分和燕尾形部分之间拉伸强度差小的α+β型相，燕尾部分室温下的拉伸强度等于或大于100kg / mm 2，并且合适的韧性通常与强度一起提供，作为具有43英寸或更长的长度的蒸汽轮机叶片，其制造方法，蒸汽轮机发电设备和低压汽轮机。在具有叶片部分和多个叉形燕尾形的汽轮机叶片中，其中叶片由Ti基合金制成，使得叶片部分的长度相对于转速等于或大于52英寸相对于转速3600rpm等于或大于43英寸，燕尾榫的室温拉伸强度等于或大于100kg / mm2，优选等于或大于等于或大于 110kg / mm2，等于或大于在叶片部分的室温下的拉伸强度的96％。

8. 发明授权

US4477280A Heat resisting steel 失效
标题翻译：耐热钢
公开(公告)号：US4477280A
公开(公告)日：1984-10-16
申请号：US452292
申请日：1982-12-22
申请人： Masao Shiga , Seishin Kirihara , Mitsuo Kuriyama , Takatoshi Yoshioka , Ryoichi Sasaki
发明人： Masao Shiga , Seishin Kirihara , Mitsuo Kuriyama , Takatoshi Yoshioka , Ryoichi Sasaki
IPC分类号： C22C38/00 , C22C38/22 , C22C38/48 , F01D5/02 , F01D5/28 , C22C38/06
CPC分类号： C22C38/22
摘要： A heat resisting steel suitable for use as material of steam turbine parts. The steel has a substantially whole tempered martensite structure and consisting essentially of, by weight, 8 to 13% of Cr, 0.5 to 2% of Mo, 0.02 to 0.5% of V, 0.02 to 0.15% of Nb, 0.025 to 0.1% of N, 0.05 to 0.25% of C, not greater than 0.6% of Si, not greater than 1.5% of Mn, not greater than 1.5% of Ni, 0.0005 to 0.02% of Al, 0.1 to 0.5% of W and the balance substantially Fe, the ratio W/Al between W content and Al content ranging between 10 and 110.
摘要翻译：适用于汽轮机部件材料的耐热钢。该钢具有基本上整个回火的马氏体结构，并且基本上由以下组成：Cr：8〜13％，Mo：0.5〜2％，V：0.02〜0.5％，Nb：0.02〜0.15％，Nb：0.02〜 N，0.05〜0.25％的C，不大于0.6％的Si，不大于Mn的1.5％，不大于1.5的Ni，0.0005至0.02％的Al，0.1至0.5％的W，余量基本上 Fe，W含量和Al含量之间的W / Al比在10和110之间。

9. 发明授权

US5569338A Steam turbine rotor shaft thereof and heat resisting steel 失效
标题翻译：蒸汽轮机转子轴和耐热钢
公开(公告)号：US5569338A
公开(公告)日：1996-10-29
申请号：US461521
申请日：1995-06-05
申请人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
发明人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
IPC分类号： C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/14 , F01D5/28 , C21D9/00
CPC分类号： F01D5/147 , C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/141 , F01D5/28 , F01D5/288 , C21D2211/002 , F05D2300/133 , F05D2300/171
摘要： The present invention relates to a steam turbine comprising a rotor shaft integrating high and low pressure portions provided with blades at the final stage thereof having a length not less than 30 inches, wherein a steam temperature at first stage blades is 530.degree. C., a ratio (L/D) of a length (L) defined between bearings of the rotor shaft to a diameter (D) measured between the terminal ends of final stage blades is 1.4 to 2.3. This rotor shaft is composed of heat resisting steel containing by weight 0.15 to 0.4% C, not more than 0.1% Si, 0.05 to 0.25% Mn, 1.5 to 2.5% Ni, 0.8 to 2.5% Cr, 0.8 to 2.5% Mo and 0.15 to 0.35% V and, further, the heat resisting steel may contain at least one of Nb, Ta, W, Ti, Al, Zr, B, Ca, and rare earth elements.
摘要翻译：汽轮机技术领域本发明涉及一种蒸汽涡轮机，其特征在于，包括转子轴，该转子轴在其最后阶段集成有高压部分和低压部分，叶片长度不小于30英寸，其中第一级叶片的蒸汽温度为530℃，在转子轴的轴承之间限定的长度（L）与最终级叶片的末端之间测量的直径（D）的比（L / D）为1.4至2.3。该转子轴由含有0.15〜0.4％C，0.1％以下的Si，0.05〜0.25％的Mn，1.5〜2.5％的Ni，0.8〜2.5％的Cr，0.8〜2.5％的Mo和0.15重量的耐热钢构成。至0.35％V，此外，耐热钢可以含有Nb，Ta，W，Ti，Al，Zr，B，Ca和稀土元素中的至少一种。

10. 发明授权

US5383768A Steam turbine, rotor shaft thereof, and heat resisting steel 失效
标题翻译：蒸汽轮机，转子轴和耐热钢
公开(公告)号：US5383768A
公开(公告)日：1995-01-24
申请号：US893079
申请日：1992-06-03
申请人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
发明人： Masao Siga , Yutaka Fukui , Mitsuo Kuriyama , Yoshimi Maeno , Masateru Suwa , Ryoichi Kaneko , Takeshi Onoda , Hidefumi Kajiwara , Yasuo Watanabe , Shintaro Takahashi , Toshimi Tan
IPC分类号： C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/14 , F01D5/28
CPC分类号： F01D5/147 , C21D9/38 , C22C38/44 , C22C38/46 , C22C38/48 , F01D5/02 , F01D5/06 , F01D5/141 , F01D5/28 , F01D5/288 , C21D2211/002 , F05D2300/133 , F05D2300/171
摘要： The present invention relates to a steam turbine comprising a rotor shaft integrating high and low pressure portions provided with blades at the final stage thereof having a length not less than 30 inches, wherein a steam temperature at first stage blades is 530.degree. C., a ratio (L/D) of a length (L) defined between bearings of the rotor shaft to a diameter (D) measured between the terminal ends of final stage blades is 1.4 to 2.3. This rotor shaft is composed of heat resisting steel containing by weight 0.15 to 0.4% C, not more than 0.1% Si, 0.05 to 0.25% Mn, 1.5 to 2.5% Ni, 0.8 to 2.5% Cr, 0.8 to 2.5% Mo and 0.15 to 0.35% V and, further, the heat resisting steel may contain at least one of Nb, Ta, W, Ti, Al, Zr, B, Ca, and rare earth elements.
摘要翻译：汽轮机技术领域本发明涉及一种蒸汽涡轮机，其特征在于，包括转子轴，该转子轴在其最后阶段集成有高压部分和低压部分，叶片长度不小于30英寸，其中第一级叶片的蒸汽温度为530℃，在转子轴的轴承之间限定的长度（L）与最终级叶片的末端之间测量的直径（D）的比（L / D）为1.4至2.3。该转子轴由含有0.15〜0.4％C，0.1％以下的Si，0.05〜0.25％的Mn，1.5〜2.5％的Ni，0.8〜2.5％的Cr，0.8〜2.5％的Mo和0.15重量的耐热钢构成。至0.35％V，此外，耐热钢可以含有Nb，Ta，W，Ti，Al，Zr，B，Ca和稀土元素中的至少一种。

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