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1. 发明专利

JP2000248337A METHOD FOR IMPROVING WATER VAPOR OXIDATION RESISTANCE OF HIGH CHROMIUM FERRITIC HEAT RESISTANT STEEL FOR BOILER AND HIGH CHROMIUM FERRITIC HEAT RESISTANT STEEL FOR BOILER EXCELLENT IN WATER VAPOR OXIDATION RESISTANCE 失效
公开(公告)号：JP2000248337A
公开(公告)日：2000-09-12
申请号：JP5391199
申请日：1999-03-02
申请人： KANSAI ELECTRIC POWER CO , MORINAGA MASAHIKO , MURATA SUMINORI , SUMITOMO METAL IND
发明人： MORINAGA MASAHIKO , MURATA SUMINORI , HASHIZUME RYOKICHI , SAWARAGI YOSHIATSU , MATSUDA KATSUHIKO
IPC分类号： C22C38/00 , C22C38/18
摘要： PROBLEM TO BE SOLVED: To provide ferritic heat resistant steel for a boiler excellent in water vapor oxidation resistance. SOLUTION: In ferritic heat resistant steel contg. 8.0 to 13.5% Cr, respectively, the content of S is controlled to 0.002 to 0.04%, and that of Si is controlled to =15. Moreover, desirably, the average Bo value determined by formula II and the average Md value determined by formula III lie in a region surrounded by the straight lines connecting the points A and B, B and C, C and D and D and A in the fig. (including the case of being on the lines): formula II: the average Bo value = ΣXi.(Bo)i, and formula III: the average Md value = ΣXi.(Md)i.

2. 发明专利

JP2001262283A METHOD FOR IMPROVING STEAM OXIDATION RESISTANCE OF AUSTENITIC HEAT RESISTING STEEL FOR BOILER, AND AUSTENITIC HEAT RESISTING STEEL FOR BOILER EXCELLENT IN STEAM OXIDATION RESISTANCE 失效
公开(公告)号：JP2001262283A
公开(公告)日：2001-09-26
申请号：JP2000079018
申请日：2000-03-21
申请人： KANSAI ELECTRIC POWER CO , MORINAGA MASAHIKO , MURATA SUMINORI , SUMITOMO METAL IND
发明人： MORINAGA MASAHIKO , MURATA SUMINORI , HASHIZUME RYOKICHI , SAWARAGI YOSHIATSU , KUBOTA MINORU
IPC分类号： C22C38/00 , C22C38/40 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for improving steam oxidation resistance using a relatively inexpensive austenitic heat resisting steel and to produce an austenitic heat resisting steel for boilers, improved in steam oxidation resistance. SOLUTION: In the austenitic heat resisting steel containing 14.0-20.0% Cr, S content and Si content are controlled to 0.002-0.04% and 16.5. Moreover, in the resultant heat resisting steel, the average Bo value determined from the equation [average Bo value]=ΣXi.(Bo)i and the average Md value determined from the equation [average Md value]=ΣXi.(Md)i are within the ranges graphically illustrated in the figure.

3. 发明专利

JPH09184048A PRODUCTION OF FERRITIC IRON-BASE ALLOY, AND HIGH CHROMIUM FERRITIC HEAT RESISTANT STEEL 失效
公开(公告)号：JPH09184048A
公开(公告)日：1997-07-15
申请号：JP34247895
申请日：1995-12-28
申请人： KANSAI ELECTRIC POWER CO , MORINAGA MASAHIKO , MURATA SUMINORI , SUMITOMO METAL IND
发明人： MORINAGA MASAHIKO , MURATA SUMINORI , HASHIZUME RYOKICHI , SAWARAGI YOSHIATSU , IGARASHI MASAAKI , HARADA MAKOTO
IPC分类号： C22C38/00 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To efficiently produce an iron-base alloy and a ferritic heat resistant steel by designing the iron-base alloy and the ferritic heat resistant steel by the prediction using the molecular orbital theory and to obtain a heat resistant steel having properties superior to the existent heat resistant steels of the same kind and suitably used for boiler. SOLUTION: With respect to various elements in an iron-base alloy of body- centered cubic crystal, the (d) electron orbit energy level (Md) and the bond order (Bo) to iron are determined by the DV-Xαcluster method, and a chemical composition is determined so that the average Bo value, represented by equation (average Bo value) = ΣXi.(Bo)i, and the average Md value, represented by equation (average Md value) = ΣXi.(Md)i, are regulated to 1.805-1.817 and 0.8520-0.8628, respectively, where Xi means the molar fraction of an alloying element (i) and (Bo)i and (Md)i mean the Bo value and Md value of the element (i), respectively. Prefered boiler steel is a ferritic heat resistant steel which contains, by weight, 9.0-13.5% Cr, 0.02-0.14% C, 0.5-4.3% Co, and 0.5-2.6% W and in which the average Bo value and the average Md value are within the area enclosed with a line connecting the points, A, B, C, and D in the figure.

4. 发明专利

JP2011032499A Heat-treatment method for regenerating part with deterioration in creep strength 审中-公开
标题翻译：热处理方法用于再生一部分，具有检测强度
公开(公告)号：JP2011032499A
公开(公告)日：2011-02-17
申请号：JP2009177226
申请日：2009-07-30
申请人： Kansai Electric Power Co Inc:The , Sumitomo Kinzoku Technol Kk , 住友金属テクノロジー株式会社 , 関西電力株式会社
发明人： UEMURA HIROMI , SAWARAGI YOSHIATSU , YANAGIDA MIYUKI
IPC分类号： C21D9/50 , C21D1/42
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a heat-treatment method for regenerating a part deteriorated by creep damage, particularly a part with deterioration in creep strength such as a welded part. SOLUTION: The heat-treatment method includes heating a member having creep voids to a heating temperature equal to or higher than the Ac 3 transformation point, wherein the heat-treatment is conducted under such a condition that a Larson Miller parameter (LMP value) defined by equation (1): LMP=(T+273)×(20+logt) (wherein T is the heating temperature (°C); and t is the heating time (h)), satisfies ≥24,000 at a heating temperature equal to or higher than the Ac 3 transformation point, so that the ratio of the number of creep voids present at a grain boundary per unit area of the member after the heat-treatment to that before the heat-treatment becomes ≤0.3. The heating temperature is preferably within the range of from "Ac 3 transformation point+30°C" to "Ac 3 transformation point+70°C". COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于使由蠕变损伤恶化的部分再生的热处理方法，特别是焊接部分的蠕变强度劣化的部分。解决方案：热处理方法包括将具有蠕变空隙的构件加热到等于或高于Ac 3 相变点的加热温度，其中热处理在这种条件下进行由式（1）定义的Larson Miller参数（LMP值）：LMP =（T + 273）×（20 + logt）（其中T是加热温度（℃）; t是加热时间（h））在等于或高于Ac 3 相变点的加热温度下满足≥24,000，使得存在于构件之后的构件的每单位面积的晶界处的蠕变空隙数热处理前的热处理为≤0.3。加热温度优选在“Ac 3 相变点+ 30℃”至“Ac 3

5. 发明专利

JP2002180169A Ni BASED HEAT RESISTANT ALLOY 失效
公开(公告)号：JP2002180169A
公开(公告)日：2002-06-26
申请号：JP2000381950
申请日：2000-12-15
申请人： SUMITOMO METAL IND
发明人： OKADA KOICHI , SAWARAGI YOSHIATSU , NISHIYAMA YOSHITAKA , OGAWA KAZUHIRO
IPC分类号： C22C19/03
摘要： PROBLEM TO BE SOLVED: To provide a heat resistant alloy which has excellent carburization resistance, caulking resistance and creep characteristics in the environment in which carburization, oxidation and temperature variation are repeated, and which has excellent hot workability. SOLUTION: The Ni based heat resistant alloy has a composition containing one or two kinds of, by mass, 0.005 to 0.3% C and 0.002 to 0.2% N,

6. 发明专利

JP2001040443A NICKEL-BASED HEAT-RESISTANT ALLOY HAVING EXCELLENT HOT WORKABILITY, WELDABILITY, AND CARBURIZING RESISTANCE 失效
公开(公告)号：JP2001040443A
公开(公告)日：2001-02-13
申请号：JP21151999
申请日：1999-07-27
申请人： SUMITOMO METAL IND
发明人： NISHIYAMA YOSHITAKA , OKADA KOICHI , SAWARAGI YOSHIATSU , ANRAKU TOSHIRO , OGAWA KAZUHIRO
IPC分类号： C22C19/05
摘要： PROBLEM TO BE SOLVED: To provide a heat-resistant alloy having a creep rupture strength sufficient enough for use as a member with a high-temperature strength together with excellent hot workability, weldability, carburizing resistance, and caulking resistance. SOLUTION: The alloy incorporates, by wt.%,

7. 发明专利

JP2000256803A AUSTENITIC STAINLESS STEEL EXCELLENT IN HIGH TEMPERATURE STRENGTH AND DUCTILITY 失效
公开(公告)号：JP2000256803A
公开(公告)日：2000-09-19
申请号：JP5773999
申请日：1999-03-04
申请人： SUMITOMO METAL IND
发明人： SENBA MITSUYUKI , SAWARAGI YOSHIATSU
IPC分类号： C22C38/00 , C22C38/48 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To impart excellent high temp. strength and ductility by preparing stainless steel having a specified componential compsn. in which the ratio between the content of Cu and the content of Nb is controlled to a specified range, and the content of non-solid solution Nb after solution heat treatment is controlled to a specified range. SOLUTION: Austenitic stainless steel having a compsn. contg., by weight, 0.03 to 0.15% C,

8. 发明专利

JPH10121188A LOW CHROMIUM FERRITIC CAST STEEL EXCELLENT IN HIGH TEMPERATURE STRENGTH AND WELDABILITY 失效
公开(公告)号：JPH10121188A
公开(公告)日：1998-05-12
申请号：JP26852996
申请日：1996-10-09
申请人： MITSUBISHI HEAVY IND LTD , SUMITOMO METAL IND
发明人： KOMAI NOBUYOSHI , MASUYAMA FUJIMITSU , YOKOYAMA TOMOMITSU , MIYATA YOSHIORI , IGARASHI MASAAKI , SAWARAGI YOSHIATSU
IPC分类号： C22C38/00 , C22C38/46 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a low Cr ferritic cast steel increased in high temp. strength and excellent in weldability, oxidation resistance, and high temp. corrosion resistance. SOLUTION: This cast steel has a composition consisting of, by weight, 0.03-0.12% C, 0.03-0.7% Si, 0.02-1% Mn, (24/32)S+(24/16)[O-(32/81) Al], and the balance iron with inevitable impurities.

9. 发明专利

JPH08225884A LOW-ARROY HEAT RESISTANT STEEL EXCELLENT IN CREEP STRENGTH AND TOUGHNESS 失效
公开(公告)号：JPH08225884A
公开(公告)日：1996-09-03
申请号：JP28755595
申请日：1995-11-06
申请人： SUMITOMO METAL IND , MITSUBISHI HEAVY IND LTD
发明人： ISEDA ATSURO , SAWARAGI YOSHIATSU , MASUYAMA FUJIMITSU , YOKOYAMA TOMOMITSU
IPC分类号： C22C38/00 , C22C38/54
摘要： PURPOSE: To increase the high temp. rupture strength of a low-alloy heat resistant steel while its merits are made use of and to substitute it for the conventional austenitic stainless steel or the like. CONSTITUTION: The low-alloy heat resistant steel having a compsn. contg. 0.03 to 0.12% C, =Ti(%)-(48/14)×N(%)>=0.003.

10. 发明专利

JPH0847794A HIGH STRENGTH STAINLESS STEEL WELDING MATERIAL EXCELLENT IN HIGH TEMP. OXIDATION RESISTANCE 失效
公开(公告)号：JPH0847794A
公开(公告)日：1996-02-20
申请号：JP18706394
申请日：1994-08-09
申请人： SUMITOMO METAL IND
发明人： OGAWA KAZUHIRO , SAWARAGI YOSHIATSU , UNO HIDEKI
IPC分类号： B23K9/23 , B23K35/30 , C22C38/00 , C22C38/54
摘要： PURPOSE:To obtain high strength stainless steel welding material excellent in high temp. oxidation resistance. CONSTITUTION:The material has a composition consisting of, by weight, 0.05-0.15% C, 0.1-0.6% Si, 0.5-2% Mn, 20-30% Cr, 5-15% Ni, 0.1-0.3% N, 0.001-0.007% B, 0.01-0.1% La+Ce, 0.01-0.2% Al, further, one or >=2 kinds among

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