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1. 发明申请

US20110142713A1 WELDING MATERIALS FOR Ni-BASED ALLOY 审中-公开
标题翻译：镍基合金焊接材料
公开(公告)号：US20110142713A1
公开(公告)日：2011-06-16
申请号：US13055804
申请日：2009-06-29
申请人： Kenji Kawasaki , Ryuichi Yamamoto , Yoshikuni Kadoya , Shin Nishimoto , Seiichi Kawaguchi
发明人： Kenji Kawasaki , Ryuichi Yamamoto , Yoshikuni Kadoya , Shin Nishimoto , Seiichi Kawaguchi
IPC分类号： B23K35/24 , C22C19/05
CPC分类号： F01D5/063 , B23K35/24 , B23K35/3033 , B23K2101/001 , B23K2103/08 , B23K2103/26 , C22C19/055 , C22C19/056 , Y02T50/671
摘要： Disclosed is a welding material for a Ni-based alloy, comprising components expressed as follows: C≦0.05 mass %; 8 mass %≦Cr≦25 mass %; Fe≦4.0 mass %; W≦15 mass %; 5 mass %≦Mo+½(W+Re)≦20 mass %; Co≦20 mass %; 0.01 mass %≦Al
摘要翻译：公开了一种用于Ni基合金的焊接材料，其包含表示如下的组分：C＆lt; lE; 0.05质量％ 8质量％＆nlE; Cr＆nlE; 25质量％ Fe + nIE; 4.0质量％; W＆nlE; 15质量％; 5质量％＆amp; NlE; Mo + 1/2（W + Re）＆nlE; 20质量％ Co＆nlE; 20质量％; 0.01质量％＆amp; A1; Al <2.0质量％; 0.01质量％; Ti <2.0质量％; Al +½Ti＆nlE; 3.0质量％; Nb +½Ta＆nlE; 1.5质量％ B＆nlE; 0.007质量％; Zr＆nlE; 0.04质量％ 0.01质量％＆nlE; Si＆NlE; 0.5质量％ Mn＆nlE; 1.0质量％ P＆nlE; 0.010质量％; S＆nlE; 0.002质量％; O＆NlE; 0.005质量％构成平衡的Ni和不可避免的杂质。

2. 发明申请

US20110126945A1 Ni-BASED ALLOY HIGH-CHROME STEEL STRUCTURE AND MANUFACTURING METHOD OF THE SAME 有权
标题翻译：镍基合金高铬钢结构及其制造方法
公开(公告)号：US20110126945A1
公开(公告)日：2011-06-02
申请号：US12673414
申请日：2009-06-11
申请人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
发明人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
IPC分类号： C21D1/00 , B32B15/01 , C21D9/00 , C21D6/00 , C22F1/10 , B23K31/02 , B32B15/18
CPC分类号： F01D5/063 , B23K35/004 , B23K35/308 , B23K2101/001 , B23K2101/04 , B23K2101/18 , B23K2103/04 , B23K2103/18 , B23K2103/26 , C21D6/02 , C21D9/50 , C22C19/05 , C22C19/053 , C22C19/057 , C22C38/001 , C22C38/04 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C22F1/10 , F05D2230/40
摘要： There are provided an Ni-based alloy high-chrome steel structure and its manufacturing method capable of joining Ni-based alloys and high-chrome steels by welding, and performing suitable heat treatment, thereby maintaining the strength in the joints. In a manufacturing method of a structure formed by joining together at least two first members formed from Ni-based alloys by welding, and joining a second member formed from high-chrome steels to a member where the first members have been joined together, the manufacturing method includes the steps: joining together the at least two first members formed from Ni-based alloys by welding; performing first-stage aging treatment on a welded joint between the first members, and then, joining the second member formed from high-chrome steels to the member where the first members have been joined together by welding; and then, performing second-stage aging treatment on the welded joint between the first members, and performing heat treatment after welding on a welded portion between the first members and the second member.
摘要翻译：提供了一种Ni基合金高铬钢结构及其制造方法，其能够通过焊接将Ni系合金和高铬钢接合，进行适当的热处理，从而保持接合部的强度。在通过焊接将由Ni基合金形成的至少两个第一部件连接在一起而形成的结构体的制造方法中，将从高铬钢形成的第二部件与第一部件接合的部件接合在一起，方法包括以下步骤：通过焊接将由Ni基合金形成的至少两个第一构件接合在一起; 在第一构件之间的焊接接头上执行第一阶段时效处理，然后通过焊接将由高铬钢形成的第二构件接合到第一构件已经接合在一起的构件; 然后对第一构件之间的焊接接头进行第二阶段时效处理，并且在第一构件和第二构件之间的焊接部分上进行焊接后的热处理。

3. 发明申请

US20100296938A1 ROTOR OF ROTATING MACHINE AND METHOD OF MANUFACTURING THE ROTOR 有权
标题翻译：旋转机的转子及制造转子的方法
公开(公告)号：US20100296938A1
公开(公告)日：2010-11-25
申请号：US12674242
申请日：2009-06-11
申请人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
发明人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
IPC分类号： F01D5/14 , B23P15/04
CPC分类号： F01D5/063 , B23K31/02 , B23K2101/001 , B23K2101/06 , B23K2103/04 , B23K2103/05 , B23K2103/18 , B23K2103/26 , F05D2300/132 , Y10T29/4932 , Y10T428/12937
摘要： A turbine rotor which is composed by connecting Ni-based alloy and heat resisting steel such as 12-Cr steel by welding to be able to ensure strength of welded parts and can be used under steam conditions of 700° C. class and method of manufacturing the rotor are also provided. The rotor of the rotating machine into which working fluid of 650° C. or higher is introduced, the rotor being composed of a plurality of members connected by welding such that material of each member is different in accordance with temperature of working fluid which flows contacting the members, wherein the first member(s) is formed from Ni-based alloy having mean linear expansion coefficient of 12.4×10−6/° C.˜14.5×10−6/° C., preferably 14.0×10−6/° C. or smaller within a temperature range from a room temperature to 700° C. and second member(s) is formed from high-chrome steels, and the rotor is composed such that the first member(s) formed from Ni-base alloy is located in a portion which contact to the working fluid of 650° C. or higher.
摘要翻译：涡轮转子，其通过焊接连接Ni基合金和耐热钢如12-Cr钢，以确保焊接部件的强度，并且可以在700℃的蒸汽条件下使用等级和制造方法还提供转子。引入650℃以上工作流体的旋转机械的转子，转子由多个通过焊接连接的构件构成，使得每个构件的材料根据流动接触的工作流体的温度而不同所述构件的第一构件由平均线膨胀系数为12.4×10 -6 /℃〜14.5×10 -6 /℃的Ni基合金形成，优选为14.0×10 -6 / ℃以下，在室温〜700℃的温度范围内，第二构件由高铬钢形成，转子构成为由Ni基形成的第一构件合金位于与工作流体650℃以上接触的部分。

4. 发明授权

US08911880B2 Rotor of rotating machine and method of manufacturing the rotor 有权
标题翻译：旋转机转子及转子制造方法
公开(公告)号：US08911880B2
公开(公告)日：2014-12-16
申请号：US12674242
申请日：2009-06-11
申请人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
发明人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
IPC分类号： C21D9/50 , B64C11/10 , B23K31/02 , F01D5/06
CPC分类号： F01D5/063 , B23K31/02 , B23K2101/001 , B23K2101/06 , B23K2103/04 , B23K2103/05 , B23K2103/18 , B23K2103/26 , F05D2300/132 , Y10T29/4932 , Y10T428/12937
摘要： A turbine rotor which is composed by connecting Ni-based alloy and heat resisting steel such as 12-Cr steel by welding to be able to ensure strength of welded parts and can be used under steam conditions of 700° C. class and method of manufacturing the rotor are also provided. The rotor of the rotating machine into which working fluid of 650° C. or higher is introduced, the rotor being composed of a plurality of members connected by welding such that material of each member is different in accordance with temperature of working fluid which flows contacting the members, wherein the first member(s) is formed from Ni-based alloy having mean linear expansion coefficient of 12.4×10−6/° C.˜14.5×10−6/° C., preferably 14.0×10−6/° C. or smaller within a temperature range from a room temperature to 700° C. and second member(s) is formed from high-chrome steels, and the rotor is composed such that the first member(s) formed from Ni-base alloy is located in a portion which contact to the working fluid of 650° C. or higher.
摘要翻译：涡轮转子，其通过焊接连接Ni基合金和耐热钢如12-Cr钢，以确保焊接部件的强度，并且可以在700℃的蒸汽条件下使用等级和制造方法还提供转子。引入650℃以上工作流体的旋转机械的转子，转子由多个通过焊接连接的构件构成，使得每个构件的材料根据流动接触的工作流体的温度而不同所述构件的第一构件由平均线膨胀系数为12.4×10 -6 /℃〜14.5×10 -6 /℃的Ni基合金形成，优选为14.0×10 -6 / ℃以下，在室温〜700℃的温度范围内，第二构件由高铬钢形成，转子构成为由Ni基形成的第一构件合金位于与工作流体650℃以上接触的部分。

5. 发明授权

US08603265B2 Ni-based alloy high-chrome steel structure and manufacturing method of the same 有权
标题翻译：镍基合金高铬钢结构及其制造方法相同
公开(公告)号：US08603265B2
公开(公告)日：2013-12-10
申请号：US12673414
申请日：2009-06-11
申请人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
发明人： Shin Nishimoto , Takashi Nakano , Yoshinori Tanaka , Tatsuaki Fujikawa , Kenji Kawasaki , Yoshikuni Kadoya , Ryuichi Yamamoto , Yuichi Hirakawa , Takashi Shige
IPC分类号： C21D1/00 , C21D9/00 , C21D6/00 , B23K31/02 , B32B15/18
CPC分类号： F01D5/063 , B23K35/004 , B23K35/308 , B23K2101/001 , B23K2101/04 , B23K2101/18 , B23K2103/04 , B23K2103/18 , B23K2103/26 , C21D6/02 , C21D9/50 , C22C19/05 , C22C19/053 , C22C19/057 , C22C38/001 , C22C38/04 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C22F1/10 , F05D2230/40
摘要： There are provided an Ni-based alloy high-chrome steel structure and its manufacturing method capable of joining Ni-based alloys and high-chrome steels by welding, and performing suitable heat treatment, thereby maintaining the strength in the joints. In a manufacturing method of a structure formed by joining together at least two first members formed from Ni-based alloys by welding, and joining a second member formed from high-chrome steels to a member where the first members have been joined together, the manufacturing method includes the steps: joining together the at least two first members formed from Ni-based alloys by welding; performing first-stage aging treatment on a welded joint between the first members, and then, joining the second member formed from high-chrome steels to the member where the first members have been joined together by welding; and then, performing second-stage aging treatment on the welded joint between the first members, and performing heat treatment after welding on a welded portion between the first members and the second member.
摘要翻译：提供了一种Ni基合金高铬钢结构及其制造方法，其能够通过焊接将Ni系合金和高铬钢接合，进行适当的热处理，从而保持接合部的强度。在通过焊接将由Ni基合金形成的至少两个第一部件连接在一起而形成的结构体的制造方法中，将从高铬钢形成的第二部件与第一部件接合的部件接合在一起，方法包括以下步骤：通过焊接将由Ni基合金形成的至少两个第一构件接合在一起; 在第一构件之间的焊接接头上执行第一阶段时效处理，然后通过焊接将由高铬钢形成的第二构件接合到第一构件已经接合在一起的构件; 然后对第一构件之间的焊接接头进行第二阶段时效处理，并且在第一构件和第二构件之间的焊接部分上进行焊接后的热处理。

6. 发明申请

US20130343893A1 TURBINE ROTOR AND PRODUCTION METHOD THEREOF 审中-公开
标题翻译：涡轮转子及其生产方法
公开(公告)号：US20130343893A1
公开(公告)日：2013-12-26
申请号：US14004471
申请日：2012-03-22
申请人： Kenji Kawasaki , Ryuichi Yamamoto , Ikuo Nakamura , Shin Nishimoto , Seiichi Kawaguchi , Takashi Shige
发明人： Kenji Kawasaki , Ryuichi Yamamoto , Ikuo Nakamura , Shin Nishimoto , Seiichi Kawaguchi , Takashi Shige
IPC分类号： F01D5/02 , B23K9/00
CPC分类号： F01D5/02 , B23K9/0026 , B23K9/0282 , B23K9/16 , B23K9/235 , B23K31/027 , B23K33/006 , B23K2101/001 , F01D5/063 , F05D2230/232
摘要： A turbine rotor related to the present invention includes a first member, and a second member joined to the first member, wherein the first and the second members are extended in an axial direction of the turbine rotor, a groove portion for welding is formed at a border between the first and the second members and penetrates the bottom portion of the groove portion, and a gas-introducing hole for introducing inert gas inside the turbine rotor is covered by welding.
摘要翻译：与本发明有关的涡轮转子包括第一构件和与第一构件接合的第二构件，其中第一构件和第二构件沿涡轮转子的轴向延伸，用于焊接的槽部形成在在第一和第二构件之间的边界，并且穿过槽部的底部，并且用于在涡轮转子内引入惰性气体的气体导入孔被焊接覆盖。

7. 发明授权

US08083874B2 Method for producing low thermal expansion Ni-base superalloy 有权
标题翻译：生产低热膨胀Ni基超级合金的方法
公开(公告)号：US08083874B2
公开(公告)日：2011-12-27
申请号：US11115159
申请日：2005-04-27
申请人： Shigeki Ueta , Toshiharu Noda , Ryuichi Yamamoto , Yoshikuni Kadoya , Ryotaro Magoshi , Shin Nishimoto
发明人： Shigeki Ueta , Toshiharu Noda , Ryuichi Yamamoto , Yoshikuni Kadoya , Ryotaro Magoshi , Shin Nishimoto
IPC分类号： C22F1/10 , C22C19/05
CPC分类号： C22C19/056 , C22C19/03 , C22C19/057 , C22C19/058 , C22F1/10
摘要： A method for producing a low thermal expansion Ni-base superalloy including the steps of subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200° C. and subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850° C. and less than 1000° C. and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850° C. at a cooling rate of 100° C. or less per hour. The method also including the steps of subjecting the alloy to a first aging treatment for precipitating y′ phase under the conditions of at a temperature of 720 to 900° C. and for 1 to 50 hours, and subjecting the alloy to a second aging treatment for precipitating A2B phase under the conditions of at a temperature of 550 to 700° C. and for 5 to 100 hours.
摘要翻译：一种生产低热膨胀Ni基超合金的方法，包括以下步骤：在1000-1200℃的温度下对合金进行固溶热处理，并对合金进行碳化物稳定化处理在不低于850℃，小于1000℃的温度和1〜50小时的条件下，在晶界上凝集的碳化物并使碳化物稳定，或者在晶界上形成碳化碳的碳化物稳定化处理并且通过从固溶热处理中的温度冷却至850℃，以每小时100℃或更低的冷却速度来稳定碳化物。该方法还包括以下步骤：在720至900℃的温度和1至50小时的条件下对合金进行第一时效处理以沉淀y相，并对合金进行第二时效处理用于在550-700℃的温度和5-100小时的条件下沉淀A2B相。

8. 发明申请

US20070284018A1 Low thermal expansion Ni-base superalloy 有权
标题翻译：低热膨胀Ni基超合金
公开(公告)号：US20070284018A1
公开(公告)日：2007-12-13
申请号：US11808614
申请日：2007-06-12
申请人： Shuji Hamano , Shigeki Ueta , Ryuichi Yamamoto , Yoshikuni Kadoya , Takashi Nakano , Shin Nishimoto
发明人： Shuji Hamano , Shigeki Ueta , Ryuichi Yamamoto , Yoshikuni Kadoya , Takashi Nakano , Shin Nishimoto
IPC分类号： C22C19/05
CPC分类号： C22C19/056 , C22C19/055
摘要： The present invention relates to a low thermal expansion Ni-base superalloy containing, in terms of mass %, C: 0.15% or less; Si: 1% or less; Mn: 1% or less; Cr: 5% or more but less than 20%; at least one of Mo, W and Re, in which Mo+½(W+Re) is 5% or more but less than 20%; W: 10% or less; Al: 0.1 to 2.5%; Ti: 0.10 to 0.95%; Nb+½Ta: 1.5% or less; B: 0.001 to 0.02%; Zr: 0.001 to 0.2%; Fe: 4.0% or less; and a balance of inevitable impurities and Ni, in which the total amount of Al, Ti, Nb and Ta is 2.0 to 6.5% in terms of atomic %. The low thermal expansion Ni-base superalloy of the present invention has a thermal expansion coefficient almost equal to that of 12 Cr ferritic steel, excellent high temperature strength, excellent corrosion and oxidation resistance, good hot-workability, and excellent weldability.
摘要翻译：本发明涉及以质量％计含有C：0.15％以下的低热膨胀性Ni基超合金。 Si：1％以下; Mn：1％以下; Cr：5％以上但小于20％; Mo，W和Re中的至少一种，其中Mo + 1/2（W + Re）为5％以上但小于20％; W：10％以下; Al：0.1〜2.5％ Ti：0.10〜0.95％ Nb +½Ta：1.5％以下; B：0.001〜0.02％; Zr：0.001〜0.2％ Fe：4.0％以下; 余量为不可避免的杂质和Ni，其中Al，Ti，Nb和Ta的总量按原子％计为2.0〜6.5％。本发明的低热膨胀性Ni基超合金的热膨胀系数几乎与12Cr铁素体钢的热膨胀系数相当，耐高温性优异，耐腐蚀性，耐氧化性优异，热加工性良好，焊接性优异。

9. 发明申请

US20050236079A1 Method for producing low thermal expansion Ni-base superalloy 有权
标题翻译：生产低热膨胀Ni基超级合金的方法
公开(公告)号：US20050236079A1
公开(公告)日：2005-10-27
申请号：US11115159
申请日：2005-04-27
申请人： Shigeki Ueta , Toshiharu Noda , Ryuichi Yamamoto , Yoshikuni Kadoya , Ryotaro Magoshi , Shin Nishimoto
发明人： Shigeki Ueta , Toshiharu Noda , Ryuichi Yamamoto , Yoshikuni Kadoya , Ryotaro Magoshi , Shin Nishimoto
IPC分类号： C22C19/03 , C22C19/05 , C22F1/00 , C22F1/10
CPC分类号： C22C19/056 , C22C19/03 , C22C19/057 , C22C19/058 , C22F1/10
摘要： The present invention provides a method for producing a low thermal expansion Ni-base superalloy, which includes: preparing an alloy including, by weight %, C: 0.15% or less, Si: 1% or less, Mn: 1% or less, Cr: 5 to 20%, at least one of Mo, W and Re, which satisfy the relationship Mo+½(W+Re): 17 to 27%, Al: 0.1 to 2%, Ti: 0.1 to 2%, Nb and Ta, which satisfy the relationship Nb+Ta/2: 1.5% or less, Fe: 10% or less, Co: 5% or less, B: 0.001 to 0.02%, Zr: 0.001 to 0.2%, a reminder of Ni and inevitable components; subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200° C.; subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850° C. and less than 1000° C. and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850° C. at a cooling rate of 100° C. or less per hour; subjecting the alloy to a first aging treatment for precipitating γ′ phase under the conditions of at a temperature of 720 to 900° C. and for 1 to 50 hours; and subjecting the alloy to a second aging treatment for precipitating A2B phase under the conditions of at a temperature of 550 to 700° C. and for 5 to 100 hours.
摘要翻译：本发明提供一种低热膨胀型Ni基超合金的制造方法，其特征在于，包括：以重量％计含有C：0.15％以下，Si：1％以下，Mn：1％以下的合金， Cr：5〜20％，满足Mo +½（W + Re）：17〜27％，Al：0.1〜2％，Ti：0.1〜2％的Mo，W和Re中的至少一种，Nb 和Ta，其满足Nb + Ta / 2：1.5％以下的关系，Fe：10％以下，Co：5％以下，B：0.001〜0.02％，Zr：0.001〜0.2％，提示Ni 和不可避免的组成部分; 在1000〜1200℃的温度下对合金进行固溶热处理; 使合金进行碳化物稳定化处理，在晶界上形成凝集碳化物，并在不低于850℃且小于1000℃的温度和1至50小时的条件下稳定碳化物，或碳化物稳定化处理，用于通过从固溶热处理中的温度冷却至850℃，以每小时100℃或更低的冷却速度使晶界上的聚集碳化物稳定化; 在720〜900℃的温度和1〜50小时的条件下对合金进行第一时效处理以使γ相析出; 并在550-700℃的温度和5〜100小时的条件下对该合金进行第二时效处理以沉淀A 2 B相。

10. 发明授权

US08491838B2 Low thermal expansion Ni-base superalloy 有权
标题翻译：低热膨胀Ni基超合金
公开(公告)号：US08491838B2
公开(公告)日：2013-07-23
申请号：US11808614
申请日：2007-06-12
申请人： Shuji Hamano , Shigeki Ueta , Ryuichi Yamamoto , Yoshikuni Kadoya , Takashi Nakano , Shin Nishimoto
发明人： Shuji Hamano , Shigeki Ueta , Ryuichi Yamamoto , Yoshikuni Kadoya , Takashi Nakano , Shin Nishimoto
IPC分类号： C22C19/05
CPC分类号： C22C19/056 , C22C19/055
摘要： The present invention relates to a low thermal expansion Ni-base superalloy containing, in terms of mass %, C: 0.15% or less; Si: 1% or less; Mn: 1% or less; Cr: 5% or more but less than 20%; at least one of Mo, W and Re, in which Mo+½(W+Re) is 5% or more but less than 20%; W: 10% or less; Al: 0.1 to 2.5%; Ti: 0.10 to 0.95%; Nb+½Ta: 1.5% or less; B: 0.001 to 0.02%; Zr: 0.001 to 0.2%; Fe: 4.0% or less; and a balance of inevitable impurities and Ni, in which the total amount of Al, Ti, Nb and Ta is 2.0 to 6.5% in terms of atomic %. The low thermal expansion Ni-base superalloy of the present invention has a thermal expansion coefficient almost equal to that of 12 Cr ferritic steel, excellent high temperature strength, excellent corrosion and oxidation resistance, good hot-workability, and excellent weldability.
摘要翻译：本发明涉及以质量％计含有C：0.15％以下的低热膨胀性Ni基超合金。 Si：1％以下; Mn：1％以下; Cr：5％以上但小于20％; Mo，W和Re中的至少一种，其中Mo + 1/2（W + Re）为5％以上但小于20％; W：10％以下; Al：0.1〜2.5％ Ti：0.10〜0.95％ Nb +½Ta：1.5％以下; B：0.001〜0.02％; Zr：0.001〜0.2％ Fe：4.0％以下; 余量为不可避免的杂质和Ni，其中Al，Ti，Nb和Ta的总量按原子％计为2.0〜6.5％。本发明的低热膨胀性Ni基超合金的热膨胀系数几乎与12Cr铁素体钢的热膨胀系数相当，耐高温性优异，耐腐蚀性，耐氧化性优异，热加工性良好，焊接性优异。

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