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1. 发明专利

JPH04124237A GAS TURBINE BLADE AND ITS PRODUCTION, AND GAS TURBINE 失效
公开(公告)号：JPH04124237A
公开(公告)日：1992-04-24
申请号：JP24521090
申请日：1990-09-14
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： YOSHINARI AKIRA , SAITO TOSHIAKI , IIJIMA KATSUKI , ISHIDA TADAMI , HASHIDA RYOZO , KANO KIMIO
IPC分类号： B22D27/04 , C22C19/03 , C22C19/05 , C30B21/02 , F01D5/28 , F01D5/30
摘要： PURPOSE:To efficiently produce a large-sized single crystal moving blade by forming the gas turbine blade of an Ni-based, alloy which consists essentially of Ni and is precipitated with a gamma' phase in a gamma phase and forming the gamma phase of a single crystal structure. CONSTITUTION:The gas turbine blade is provided with a dovetail part 10 which is the fixing part to a disk, a shank part 9 having projections 11 which are continuous with this part and are integrally projectingly provided on the side surfaces thereof, and a vane part 8 continuous therewith. The gas turbine blade consists of the Ni-based alloy which consists essentially of the Ni and is substantially precipitated with the gamma' phase in the gamma phase. Contribution is made to the prolonging of the life of the moving blade and the improvement in the thermal efficiency of the gas turbine by the increase in combustion gas temp. in this way.

2. 发明专利

JPH09144502A GAS TURBINE BLADE AND ITS MANUFACTURE AND GAS TURBINE 失效
公开(公告)号：JPH09144502A
公开(公告)日：1997-06-03
申请号：JP20446096
申请日：1996-08-02
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： YOSHINARI AKIRA , SAITO TOSHIAKI , IIJIMA KATSUKI , ISHIDA TADAMI , HASHIDA RYOZO , KANO KIMIO
IPC分类号： F01D5/14 , B22C9/22 , B22D27/04 , C22C19/03 , F01D5/28 , F01D5/30 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To provide a gas turbine blade which is excellent in tensile strength and creep strength and moreover, in heat resisting fatigue strength to heat and stress by forming a platform part which projects about just transversely to a blade part and has specified total length, and is composed of Ni-group alloy having r'-phase deposited in r-phase. SOLUTION: A gas turbine blade has a shank part 9 lying in a line with a dovotail part 10 and a single or a plurality of projections 11 provided integrally with both the sides of a flank of the shank part 9, and moreover a platform part 17 lying in a line with the shank part 9 and a blade part 8 lying in a line with the platform part 17. The platform part 17 specially has a form projecting about just transversely to a blade part 8, and a gas turbine blade is more than 160mm in total length and wholly composed of Ni as main component and formed of Ni group alloy having r'-phase deposited in r-phase, and the r-phase is a single crystal texture. Thus the gas turbine blade which is excellent in tensile strength and creep strength and moreover the heat resisting fatigue strength to heat and stress can be obtained.

3. 发明专利

JPS59142459A Inspecting method of metallic member 失效
标题翻译：金属会员检查方法
公开(公告)号：JPS59142459A
公开(公告)日：1984-08-15
申请号：JP1603683
申请日：1983-02-04
申请人： Hitachi Ltd
发明人： YOSHIOKA TAKATOSHI , KIRIHARA SEISHIN , SHIGA MASAO , YOSHIDA TAKEHIKO , IIJIMA KATSUKI
IPC分类号： G01N29/04 , G01M13/04 , G01N29/14
CPC分类号： G01N29/14 , G01N2291/2693 , G01N2291/2696
摘要： PURPOSE:To improve the defect detecting accuracy of a center hole by adding internal pressure to the center hole of a rotor shaft, and inspecting the center hole by using jointly an acoustic emission method and the conventional inspecting method. CONSTITUTION:An acoustic emission method (AE method) being a dynamic nondestructive inspecting method is applied to a defect detection of a center hole of a rotor shaft. As for the AE measuring method, a multi-channel AE measuring device 4 which is capable of marking a position is used, and two pieces each of AE detectors 3 are installed to both ends of a rotor shaft 7. Subsequently, internal pressure 3 is added to a center hole 2 of the rotor shaft 7. When a crack exists, stress is concentrated on the tip part of its crack and an elastic deformation is caused, as a result of addition of the internal pressure. Accordingly, the circumference of a position where a defect is generated, which is detected by the AE measuring device is inspected minutely by the conventional inspecting method. In this way, the defect detecting accuracy of the center hole is improved.
摘要翻译：目的：通过向转子轴的中心孔内加上内压，通过联合声发射法和常规检查方法检查中心孔，提高中心孔的缺陷检测精度。构成：将作为动态非破坏性检查方法的声发射法（AE法）应用于转子轴的中心孔的缺陷检测。对于AE测量方法，使用能够标记位置的多通道AE测量装置4，并且将两个AE检测器3安装在转子轴7的两端。随后，内部压力3为添加到转子轴7的中心孔2.当存在裂纹时，由于内压的增加，应力集中在其裂纹的尖端部分并且引起弹性变形。因此，通过常规的检查方法检查由AE测量装置检测到的产生缺陷的位置的周边。以这种方式，提高了中心孔的缺陷检测精度。

4. 发明专利

JPS58125396A AUSTENITIC WELDED STRUCTURE 失效
公开(公告)号：JPS58125396A
公开(公告)日：1983-07-26
申请号：JP754882
申请日：1982-01-22
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： SUKEGAWA MASAYUKI , HIDA YOSHIMITSU , KIRIHARA SEISHIN , MORIMOTO HISASHI , USAMI KENICHI , IIJIMA KATSUKI
IPC分类号： C22C38/00 , B23K35/30 , C22C30/00 , C22C38/44 , C22C38/48 , C22C38/58
摘要： PURPOSE:To possess excellent ductility against creep fracture and strength by removing Al from an alloy for structural purposes and reinforcing the same with Mo in order to make the coeffts. of thermal expansion of said alloy and weld metal the same and adding a prescribed content of Nb thereto in order to obtain high temp. ductility. CONSTITUTION:An austenitic welded structure constituted of an austenite alloy for structural purposes contg., by weight, 32-38% Ni, 21-25% Cr, 1.0-1.6% Mo, 0.1-1% Nb, and weld metal consisting, by weight, of 0.02-0.08% C, 0.1- 1.5% Si, 2-3% Mn, 32-38% Ni, 21-25% Cr, 1-1.6% Mo, 0.1-1% Nb and the balance Fe.

5. 发明专利

JP2581824B2 失效
公开(公告)号：JP2581824B2
公开(公告)日：1997-02-12
申请号：JP9222790
申请日：1990-04-09
申请人： HITACHI LTD
发明人： YOSHINARI AKIRA , IIJIMA KATSUKI , ISHIDA TADAMI , SAITO TOSHIAKI , KATO TAKAHIKO
IPC分类号： F16B39/28 , B22C9/22 , B22D27/04 , C22C1/02 , C22C19/03 , C22C33/04 , C22C38/00

6. 发明专利

JPH03134201A GAS TURBINE MOVING BLADE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH03134201A
公开(公告)日：1991-06-07
申请号：JP27132289
申请日：1989-10-18
申请人： HITACHI LTD
发明人： YOSHINARI AKIRA , MORIKAWA MINORU , HIRANE TERUO , ICHIGE MAKOTO , OKAYAMA AKIRA , SAITO TOSHIAKI , IIJIMA KATSUKI , ISHIDA TADAMI , KODAMA HIDEYO , HASHIDA RYOZO
IPC分类号： F01D5/28 , B22D19/00 , B22D21/00 , B22D27/04 , F01D5/30
摘要： PURPOSE:To make it possible to improve corrosion resistance and creep strength in a blade part and high temperature strength in a dovetail part by continuously changing a composition between the blade part and the dovetail part. CONSTITUTION:In the case of an Ni-radical alloy-made gas turbine moving blade in which a blade part 10 is formed of a corrosion resistance alloy with a dovetail part 12 formed of a high temperature resistance high strength alloy, the blade part 10 is set to a 13wt.% or more Cr amount with the Cr amount gradually decreased from a shank part 11 over to the dovetail part 12, and the Cr amount is decreased in the dovetail part 12 having maximum strength. In this way, corrosion resistance and creep strength of the blade part 10 and high temperature strength of the dovetail part 12 can be improved. Accordingly, the extension of a life of the moving blade and the improvement of thermal efficiency of a gas turbine by increasing its combustion gas temperature can be contrived.

7. 发明专利

JPS62182168A METHOD OF JOINING CERAMICS TO METAL 失效
公开(公告)号：JPS62182168A
公开(公告)日：1987-08-10
申请号：JP2011386
申请日：1986-02-03
申请人： HITACHI LTD
发明人： YOSHIOKA TAKATOSHI , FUKUI HIROSHI , SHIGA MASAO , HIYAMA KIYOSHI , YOSHIDA TAKEHIKO , IIJIMA KATSUKI
IPC分类号： C04B37/02 , B23K20/00

8. 发明专利

JPH0563544B2 失效
公开(公告)号：JPH0563544B2
公开(公告)日：1993-09-10
申请号：JP163087
申请日：1987-01-09
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , KURYAMA MITSUO , IIJIMA KATSUKI , MAENO YOSHIMI , TAKAHASHI SHINTARO , IIZUKA NOBUYUKI , KUROSAWA SOICHI , WATANABE YASUO , HIRAGA MAKOTO
IPC分类号： C22C38/00 , C22C19/05 , C22C19/07 , C22C38/46 , C22C38/48 , C22C38/54 , F01D5/00 , F01D5/06 , F01D5/28
摘要： This new heat-resistant steel has the following component compsn. (1) C (0.05-0.2 wt.%), Si (0.5 wt.% or less), Mn (0.6 wt.% or less), Cr (8-13 wt.%, Mo (1.5-3 wt.%), Ni (2-3 wt.%), V (0.05-0.3 wt.%), Nb and/or Ta (total amount : 0.02-2.0 wt.%), N (0.02-0.1 wt.%), Fe (the remaining wt.%), Mn/Ni is not more than 0.11 (2) C (0.07-0.15 wt.%), Si (0.01 or 0.1 wt.%), Mn (0.1-0.4 wt.%), Cr (11-12.5 wt.%), Ni (2.2-3.0 wt.%), Mo (1.8-2.5 wt.%), Nb and/or Ta (total amount:0.04 - 0.08 wt.%), Fe (the remaining wt.%), Mn/Ni = 0.04-0.10 (3) C (0.05-0.2 wt.%), Si (0.5 wt.% or less), Mn (0.6 wt.% or less), Cr (8-13 wt.%), Mo (1.5-3 wt.%), Ni (2-3 wt.%), V (0.05-0.3 wt.%), Nb and/or Ta (total amount : 0.02-0.2 wt.%), N (0.02-0.1 wt.%), W (1 wt.% or less), Co (0.5 wt.% or less), Cu (0.5 wt.% or less), B (0.01 wt.% or less), Ti (0.5 wt.% or less), Al (0.3 wt.% or less). Zr (0.1 wt.% or less), Hf (0.1 wt.% or less), Ca (0.01 wt.% or less), Mg (0.01 wt.% or less), Y (0.01 wt.% or less), rare earth elements (0.01 wt.% or less), Fe (the remaining wt.%). (1) has characteristics such as creep rupture strength of at least 50 kg/mm2 at 450 deg. C for 105 hours and a 25 V-notch Charpy impact value of at least 5 Kg/m/cm2 after heat treatment at 500 deg. C for 103 hours. Compsn. (2) has the annealed martensite structure. This heat-resistant steel is used for the turbine discs of a gas turbine which consists of a turbine shaft, a number of turbine discs, a number of compression discs connected to the distant pieces by compressor stacking bolts, compressor blades implated in the compressor discs and a compressor stub shaft shaped integrally at the initial stage of the compressor disc.

9. 发明专利

JPS62182254A SPACER FOR GAS TURBINE 失效
公开(公告)号：JPS62182254A
公开(公告)日：1987-08-10
申请号：JP2382986
申请日：1986-02-07
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , KURIYAMA MITSUO , IIJIMA KATSUKI , KUROSAWA SOICHI
IPC分类号： F01D5/28 , C22C38/00 , C22C38/48
摘要： PURPOSE:To improve creep rupture strength at high temp. and toughness at room temp. of a spacer, by forming the material of a spacer for gas turbine of a martensitic steel having a specific composition. CONSTITUTION:The spacer for gas turbine is manufactured by use of the martensitic alloy steel having a composition which consists of, by weight, 0.05-0.2% C, =75% Fe and in which Cr equivalent represented by equation [I] is =45kg/mm and a 20 deg.C V notch Charpy impact value of >=5kg-m/cm , and excellent in reliability against fracture at high temp. can be obtained.

10. 发明专利

JPS62182167A METHOD OF JOINING CERAMICS TO METAL 失效
公开(公告)号：JPS62182167A
公开(公告)日：1987-08-10
申请号：JP2011286
申请日：1986-02-03
申请人： HITACHI LTD
发明人： YOSHIOKA TAKATOSHI , FUKUI HIROSHI , SHIGA MASAO , HIYAMA KIYOSHI , YOSHIDA TAKEHIKO , IIJIMA KATSUKI
IPC分类号： C04B37/02 , B23K20/00

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