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    METHOD FOR ASSESSING REMAINING LIFESPAN OF BOLT USED AT HIGH TEMPERATURES
    11.
    发明申请
    METHOD FOR ASSESSING REMAINING LIFESPAN OF BOLT USED AT HIGH TEMPERATURES 有权
    用于评估在高温下使用的玻璃的残留寿命的方法

    公开(公告)号：US20100236333A1

    公开(公告)日：2010-09-23

    申请号：US12708017

    申请日：2010-02-18

    申请人： Masahiko ARAI ,  Shinichi KOBAYASHI ,  Hiroyuki DOI ,  Hiroaki CHIBA ,  Takashi HANEISHI

    发明人： Masahiko ARAI ,  Shinichi KOBAYASHI ,  Hiroyuki DOI ,  Hiroaki CHIBA ,  Takashi HANEISHI

    IPC分类号： G01N3/02

    CPC分类号： G01N3/60 ,  G01N2203/0071 ,  G01N2203/0688 ,  G01N2203/0694

    摘要： The present invention is intended to provide a method for assessing remaining lifespan of a bolt with higher precision than conventional methods, which can be applied to a bolt comprising a high alloy with fewer tissue changes caused by creep damage.The present invention provides a method for assessing the remaining lifespan of a bolt used at high temperatures, including: carrying out a creep test for a bolt material that constitutes a bolt to be assessed and determining a life-time and a life-elongation rate; determining a time-temperature parameter based on the life-time and the creep test temperature; creating a lifespan-assessment diagram by plotting the time-temperature parameter with respect to the life-elongation rate; measuring a elongation rate between before and after the use of the bolt to be assessed; and assessing the remaining lifespan of the bolt with the use of the elongation rate between before and after the use of the bolt to be assessed and the lifespan-assessment diagram.

    摘要翻译： 本发明旨在提供一种用于评估具有比常规方法更高精度的螺栓的剩余寿命的方法，其可以应用于包括由蠕变损伤引起的较少组织变化的高合金的螺栓。 本发明提供一种用于评估在高温下使用的螺栓的剩余寿命的方法，包括：对构成要评估的螺栓的螺栓材料进行蠕变试验，并确定寿命和寿命延长率; 根据寿命和蠕变试验温度确定时间 - 温度参数; 通过绘制时间 - 温度参数相对于寿命延长率来创建寿命评估图; 测量在使用要评估的螺栓之前和之后的伸长率; 并使用在评估螺栓的使用前后的伸长率和寿命评估图来评估螺栓的剩余寿命。

    High-strength heat resisting cast steel, method of producing the steel, and applications of the steel
    12.
    发明申请
    High-strength heat resisting cast steel, method of producing the steel, and applications of the steel 审中-公开
    高强度耐热铸钢，钢的生产方法和钢的应用

    公开(公告)号：US20070071599A1

    公开(公告)日：2007-03-29

    申请号：US11528439

    申请日：2006-09-28

    申请人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hideo Yoda

    发明人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hideo Yoda

    IPC分类号： F04D29/44

    CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52

    摘要： A high-strength heat resisting cast steel which has high creep rupture strength at temperatures of 620° C. or above, high toughness, and good weldability. A method of producing the steel, a steam turbine casing, a main steam valve casing, and a steam control valve casing, each casing being made of that steel, as well as a steam turbine power plant using those components are also provided. The high-strength heat resisting cast steel contains 0.06-0.16% by mass of C, 0.1-1% of Si, 0.1-1% of Mn, 8-12% of Cr, 0.1-1.0% of Ni, 0.7% or less of Mo, 1.9-3.0% of W, 0.05-0.3% of V, 0.01-0.15% of one or more of Nb, Ta and Zr in total, 0.1-2% of Co, 0.01-0.08% of N, and 0.0005-0.01% of B, the balance being Fe and unavoidable impurities.

    摘要翻译： 高温耐热铸钢，其温度为620℃以上，蠕变断裂强度高，韧性高，焊接性好。 还提供了一种制造钢的方法，蒸汽轮机壳体，主蒸汽阀壳体和蒸汽控制阀壳体，每个壳体由该钢制成，以及使用这些部件的蒸汽轮机发电厂。 高强度耐热铸钢含有0.06-0.16质量％的C，0.1-1％的Si，0.1-1％的Mn，8-12％的Cr，0.1-1.0％的Ni，0.7％以下的 的Mo，1.9〜3.0％的V，0.05〜0.3％的V，0.01-0.15％的Nb，Ta和Zr中的一种或多种，​​Co：0.1〜2％，N：0.01-0.08％，N：0.0005 -0.01％的B，余量为Fe和不可避免的杂质。

    Heat resisting steel, gas turbine using the steel, and components thereof
    13.
    发明申请
    Heat resisting steel, gas turbine using the steel, and components thereof 审中-公开
    耐热钢，使用钢的燃气轮机及其部件

    公开(公告)号：US20050074356A1

    公开(公告)日：2005-04-07

    申请号：US10757847

    申请日：2004-01-16

    申请人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hiroyuki Doi ,  Isao Takehara ,  Hidetoshi Kuroki

    发明人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hiroyuki Doi ,  Isao Takehara ,  Hidetoshi Kuroki

    IPC分类号： F01D5/06 ,  C22C38/00 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C22C38/54 ,  F01D5/28 ,  F02C7/00

    CPC分类号： C22C38/44 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  C22C38/54

    摘要： The invention is of a heat resisting martensitic steel comprising, by weight, 0.05 to 0.30% C, not more than 0.50% Si, not more than 0.60% Mn, 8.0 to 13.0% Cr, 0.5 to 3.0% Ni, 1.0 to 3.0% Mo, 0.1 to 1.5% W, 0.5 to 4% Co, 0.05 to 0.35% V, 0.02 to 0.30% in total of one or two elements selected from the group consisting of Nb and Ta, and 0.02 to 0.10% N, wherein a value of the square of a difference between the Ni amount and the Co amount, and the Ni amount are not more than values determined by a straight line drawn on a point A (1.0, 2.7%) and a point B (2.5, 1.0%) in the orthogonal coordinates shown in the attached drawing of FIG. 2 which represents a relationship between the above square value and the Ni amount, and an amount ratio of Mo/(Mo+0.5 W) is not less than 0.5. The heat resisting steel is suitably used in various components of a gas turbine.

    摘要翻译： 本发明是耐热马氏体钢，其含有0.05〜0.30％C，不大于0.50％Si，不大于0.60％Mn，8.0〜13.0％Cr，0.5〜3.0％Ni，1.0〜3.0％ Mo，0.1〜1.5％W，0.5〜4％Co，0.05〜0.35％V，0.02〜0.30％，1种或2种选自Nb和Ta的元素和0.02〜0.10％N，其中a Ni量和Co量之间的差的平方值，Ni量不大于通过点A（1.0,2.7％）和点B（2.5,1.0％）绘制的直线所确定的值， ）在附图中所示的正交坐标中图。 2表示上述平方值与Ni量之间的关系，Mo /（Mo + 0.5W）的量比不小于0.5。 耐热钢适用于燃气轮机的各种部件。

    Precipitate hardening stainless steel and long blade using same for steam turbine
    15.
    发明授权
    Precipitate hardening stainless steel and long blade using same for steam turbine 有权
    沉淀硬化不锈钢和长叶片使用相同的汽轮机

    公开(公告)号：US09062362B2

    公开(公告)日：2015-06-23

    申请号：US13495386

    申请日：2012-06-13

    申请人： Shinji Oikawa ,  Hideo Yoda ,  Masahiko Arai ,  Hiroyuki Doi

    发明人： Shinji Oikawa ,  Hideo Yoda ,  Masahiko Arai ,  Hiroyuki Doi

    IPC分类号： F01D5/28 ,  C22C38/50 ,  C22C38/44

    CPC分类号： C22C38/50 ,  C22C38/44

    摘要： As a precipitate hardening stainless steel has excellent structure stability, strength, toughness, and corrosion resistance, requires no sub-zero treating and is excellent in terms of productivity, a long blade for a steam turbine uses the same. The following are provided: a precipitate hardening stainless steel, which comprises C at 0.05 mass % or less, N at 0.05 mass % or less, Cr at 10.0 mass % to 14.0 mass %, Ni at 8.5 mass % to 11.5 mass %, Mo at 0.5 mass % to 3.0 mass %, Ti at 1.5 mass % to 2.0 mass %, Al at 0.25 mass % to 1.00 mass %, Si at 0.5 mass % or less, and Mn at 1.0 mass % or less, and the balance is composed of Fe and inevitable impurities. The long blade for a steam turbine is composed of this precipitate hardening stainless steel.

    摘要翻译： 作为沉淀硬化不锈钢具有优异的结构稳定性，强度，韧性和耐腐蚀性，不需要次零处理，并且在生产率方面优异，蒸汽轮机的长叶片使用它。 提供以下：沉淀硬化不锈钢，其含有0.05质量％以下的C，0.05质量％以下的N，10.0质量％〜14.0质量％的Cr，8.5质量％〜11.5质量％的Ni，Mo 1.5质量％至2.0质量％的Ti，0.5质量％至3.0质量％的Al，0.25质量％至1.00质量％的Al，0.5质量％以下的Si，1.0质量％以下的Mn，余量为 由Fe和不可避免的杂质组成。 蒸汽轮机的长叶片由这种沉淀硬化不锈钢组成。

    High-strength martensite heat resisting cast steel, method of producing the steel, and applications of the steel
    18.
    发明申请
    High-strength martensite heat resisting cast steel, method of producing the steel, and applications of the steel 审中-公开
    高强度马氏体耐热铸钢，钢的生产方法和钢的应用

    公开(公告)号：US20100122754A1

    公开(公告)日：2010-05-20

    申请号：US11528474

    申请日：2006-09-28

    申请人： Hirotsugu Kawanaka ,  Masahiko Arai ,  Hideo Yoda

    发明人： Hirotsugu Kawanaka ,  Masahiko Arai ,  Hideo Yoda

    IPC分类号： C21D8/00 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  C22C38/54

    CPC分类号： F01D5/02 ,  C21D8/00 ,  C21D9/28 ,  C21D9/38 ,  C22C38/001 ,  C22C38/04 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  F01D5/28 ,  F05D2230/25 ,  F05D2230/40

    摘要： A high-strength martensite heat resisting steel which has long-time creep rupture strength required for steam temperature condition of 600-630° C. and toughness at room temperature, and which is suitable for use as a material of a steam turbine rotor shaft and as large-sized forged steel with an improvement of hot forgeability. A method of producing the steel and applications of the steel are also provided. The high-strength martensite heat resisting steel contains 0.05-0.20% by mass of C, 0.1% or less of Si, 0.05-0.6% of Mn, 0.1-0.6% of Ni, 9.0-12.0% of Cr, 0.20-0.65% of Mo, 2.0-3.0% of W, 0.1-0.3% of V, 2.0% or less of Co, 0.02-0.20% of Nb, 0.015% or less of B, 0.01-0.10% of N, and 0.015% or less of Al, (W/Mo) being 4.0-10.0.

    摘要翻译： 一种高温马氏体耐热钢，其蒸汽温度条件为600-630℃所需的长时间蠕变断裂强度，室温下的韧性，适用于汽轮机转子轴的材料， 作为大型锻钢，具有提高热锻性能。 还提供了钢的制造方法和钢的应用。 高强度马氏体耐热钢含有0.05-0.20质量％的C，0.1％或更少的Si，0.05-0.6％的Mn，0.1-0.6％的Ni，9.0-12.0％的Cr，0.20-0.65％ 的Mo，2.0〜3.0％的W，0.1-0.3％的V，2.0％以下的Co，0.02〜0.20％的Nb，0.015％以下的B，0.01-0.10％的N和0.015％以下的 的Al，（W / Mo）为4.0〜10.0。

    Heat resisting steel, gas turbine using the steel, and components thereof
    20.
    发明申请
    Heat resisting steel, gas turbine using the steel, and components thereof 审中-公开
    耐热钢，使用钢的燃气轮机及其部件

    公开(公告)号：US20090068052A1

    公开(公告)日：2009-03-12

    申请号：US12153552

    申请日：2008-05-21

    申请人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hiroyuki Doi ,  Isao Takehara ,  Hidetoshi Kuroki

    发明人： Masahiko Arai ,  Hirotsugu Kawanaka ,  Hiroyuki Doi ,  Isao Takehara ,  Hidetoshi Kuroki

    IPC分类号： C22C38/52 ,  C22C38/44

    CPC分类号： C22C38/44 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  C22C38/54

    摘要： The invention is of a heat resisting martensitic steel comprising, by weight, 0.05 to 0.30% C, not more than 0.50% Si, not more than 0.60% Mn, 8.0 to 13.0% Cr, 0.5 to 3.0% Ni, 1.0 to 3.0% Mo, 0.1 to 1.5% W, 0.5 to 4% Co, 0.05 to 0.35% V, 0.02 to 0.30% in total of one or two elements selected from the group consisting of Nb and Ta, and 0.02 to 0.10% N, wherein a value of the square of a difference between the Ni amount and the Co amount, and the Ni amount are not more than values determined by a straight line drawn on a point A (1.0, 2.7%) and a point B (2.5, 1.0%) in the orthogonal coordinates shown in the attached drawing of FIG. 2 which represents a relationship between the above square value and the Ni amount, and an amount ratio of Mo/(Mo+0.5W) is not less than 0.5. The heat resisting steel is suitably used in various components of a gas turbine.

    摘要翻译： 本发明是耐热马氏体钢，其含有0.05〜0.30％C，不大于0.50％Si，不大于0.60％Mn，8.0〜13.0％Cr，0.5〜3.0％Ni，1.0〜3.0％ Mo，0.1〜1.5％W，0.5〜4％Co，0.05〜0.35％V，0.02〜0.30％，1种或2种选自Nb和Ta的元素和0.02〜0.10％N，其中a Ni量和Co量之间的差的平方值，Ni量不大于通过点A（1.0,2.7％）和点B（2.5,1.0％）绘制的直线所确定的值， ）在图1的附图中示出。 2表示上述平方值与Ni量之间的关系，Mo /（Mo + 0.5W）的量比不小于0.5。 耐热钢适用于燃气轮机的各种部件。