公开(公告)号：US06206634B1

公开(公告)日：2001-03-27

申请号：US09369166

申请日：1999-08-05

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： F01D102

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： There is provided 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： 提供了一种由Ti基合金制成的汽轮机叶片，其包括α+β型相，其中叶片部分和燕尾部分之间的拉伸强度差异小，燕尾部分的室温下的拉伸强度 等于或大于100kg / mm2，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 低压蒸汽轮机。 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％。

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％。

公开(公告)号：US5749228A

公开(公告)日：1998-05-12

申请号：US453556

申请日：1995-05-30

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 ,  B63H1/26

CPC分类号： F01D5/28 ,  B23K35/308 ,  C21D9/38 ,  B23K35/004 ,  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 (.degree.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/mm.sup.2) 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/mm.sup.2). The steam turbine of high thermal efficiency can be applied to a steam-turbine power plant.

摘要翻译： 其中主要组分暴露在高温下的汽轮机全部由铁素体钢制成，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。

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。

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。

公开(公告)号：US5624235A

公开(公告)日：1997-04-29

申请号：US530960

申请日：1995-09-20

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。

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。

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。

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。

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。