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61. 发明专利

JPS59222565A PRODUCTION OF PRECIPITATION HARDENING TYPE ALLOY MEMBER 失效
公开(公告)号：JPS59222565A
公开(公告)日：1984-12-14
申请号：JP9681283
申请日：1983-05-31
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWAI HISATAKA , NAGAOKA TOMOKICHI
IPC分类号： C22F1/10 , B21D3/00
摘要： PURPOSE:To obtain a member which can satisfy the requirments specified for a heat treatment without deformation and residual stress in a titled process for producing said member in which an aging treatment, machining or straightening stage is included by dividing the aging treatment stage and performing the other stages mentioned above between the divided stages. CONSTITUTION:Raw materials are melted and cast and the casting is subjected to decomposing, forging and annealing heat treatment then to straightening A of bend with a cold press in the case of producing, for example, a pump shaft of ''Monel K500''. The pump shaft is then subjected to an aging heat treatment A of air cooling at the same temp. as in the prior art in which the heat treatment is performed by as much as half the time specified by standards and the pump shaft is machined and is again subjected to straightening B. Said shaft is in succession subjected to the aging heat treatment B under the same conditions as those for the treatment A to complete a product. The precipitation hardening type alloy member which is free from the deformation and residual stress occuring in the machining and aging treatment and can meet the requirements specified for the heat treatment of the material is thus obtd.

62. 发明专利

JPS57167568A MANUFACTURE OF METAL GASKET 失效
公开(公告)号：JPS57167568A
公开(公告)日：1982-10-15
申请号：JP5127881
申请日：1981-04-07
申请人： MITSUBISHI HEAVY IND LTD , NOMURA TOKIN KK
发明人： HARADA YOSHIO , KAWAI HISATAKA , MINAMI MASAHARU , OGINO MUTSUO , YAMANAKA TOSHIYUKI , SHIMOMURA TOMOYOSHI , YOKOYAMA YOSHIO , YAMASHITA KOUJI , NOMURA HIROTOSHI
IPC分类号： C25D7/00 , F16J15/08 , F16J15/50 , F16K1/36
摘要： PURPOSE:To obtain a metal gasket which does not cause creep at its sealing edge nor cause damages to a valve seat even if it is used for a long time under a high temperature in the state that a valve is closed. CONSTITUTION:A metal gasket of this invention is manufactured as follows. At first, a nickel plating 3'' having a thickness of several mum is appied over the surface of a base 3' of stainless steel by immersing the base 3' in a bath of nickel chloride, and then a copper plating 3''' having a thickness of several mm. and a hardness of 180-220Hv is applied over the nickel plating 3'' by immersing the same in a bath of copper pyrophosphate added with a sulfuric compound containing additive. After appplying the copper plating 3''', heat treatment is applied at 250 deg.C for 20min-3hr so as to increase the hardness of the copper plating 3''' to 100-180Hv. In case that a metal gasket manufactured as above is used for a long time at a high temperature in the state that a valve is sealed by a load acted thereto, its sealing edge portion has a high resistance against creep, so that the stainless steel 3' does not come into direct contact with the valve seat. Thus, it is enabled to improve durability of the seal.

63. 发明专利

JPS55143403A MEASURING METHOD FOR EXPANSION OF TEST PIECE 失效
公开(公告)号：JPS55143403A
公开(公告)日：1980-11-08
申请号：JP5086079
申请日：1979-04-26
申请人： MITSUBISHI HEAVY IND LTD , SEIRYO ENG
发明人： KAWAI HISATAKA , YOKOYAMA YOSHIO
IPC分类号： G01N3/06 , G01B5/30 , G01B21/32
摘要： PURPOSE:To measure expansion characteristics of even a material small in expansion and inferior in workability with high precision by bringing a small piece of low thermal coefficient of expansion, which penetrates a rod supporting a test piece and has on terminal fixed to a dial gauge, into contact with the test piece. CONSTITUTION:Both ends of test piece 21 are supported by a couple of rods 24 and 27. Those rods 24 and 27 have through holes 30 and 34, through which pieces made of a material of low thermal coefficient of expansion, e.g. quartz pieces 32 and 35 are inserted. Each of those quartz pieces 32 and 35 has one terminal made in contact with the flank of test piece 21 and the other touching dial gauge 33 or 39 fixed at a stationary position. This unit, equipped with heating furnace 41 and upper and lower covers 42 and 43 is heated up to a fixed temperature and held to record changes of dial gauges 33 and 39 as the time passes, and a difference between dials 39 and 33 is found.

64. 发明专利

JP2001294959A SINGLE CRYSTAL Ni HEAT RESISTANT ALLOY AND TURBINE BRADE 失效
公开(公告)号：JP2001294959A
公开(公告)日：2001-10-26
申请号：JP2000115164
申请日：2000-04-17
申请人： MITSUBISHI HEAVY IND LTD
发明人： OKADA IKUO , TAKAHASHI KOJI , IZUTSU DAISUKE , KAWAI HISATAKA
IPC分类号： F01D5/28 , C22C19/05
摘要： PROBLEM TO BE SOLVED: To provide a single crystal heat resistant Ni alloy excellent in castability and also excellent in a high temperature strength, and to provide a turbine brade made of the same. SOLUTION: This alloy has a composition containing, by weight, 7.5 to 10% Cr, 4.5 to 6% Co, 0.5 to 3% Mo, 7 to 9% W, 4.5 to 6.5% Al and 5.5 to 7.0% Ta, and further containing either or both of 0.005 to 0.07% C and 0.001 to 0.006% B. If required, the alloy contains one or more kinds metals selected from 0.01 to 0.2% Hf, 0.01 to 2% Re, 0.01 to 0.03% Pt, 1 to 100 ppm Ca, 1 to 100 ppm Mg and 0.5 to 2% Ti as well.

65. 发明专利

JPH11236655A PERFORMANCE RECOVERING TREATING METHOD FOR NICKEL BASE HEAT RESISTANT ALLOY 失效
公开(公告)号：JPH11236655A
公开(公告)日：1999-08-31
申请号：JP5574098
申请日：1998-02-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWAI HISATAKA , HIBARA YOSHIHISA , OKADA IKUO , IMAZU TAKAYUKI
IPC分类号： C22F1/00 , C22C19/05 , C22F1/10
摘要： PROBLEM TO BE SOLVED: To recover the performance of an alloy and to enable its second use by performing an Ni base heat resistant alloy having a specified compsn. and whose the performance such as strength, ductility or the like is deteriorated by use at high temps. to a specified primary solution treatment and a secondary solution treatment in succession and thereafter, executing a specified aging treatment. SOLUTION: This Ni base heat resistant alloy having a compsn. contg., by weight, 13.1 to 15% Cr, 8.5 to 10.5% Co, 1 to 3.5% Mo, 3.5 to 4.5% W, 3 to 5.5% Ta, 3.5 to 4.5% Al, 2.2 to 3.2% Ti, 0.06 to 0.12% C,

66. 发明专利

JPH1088291A HEAT RESISTANT CAST STEEL WITH HIGH STRENGTH AND HIGH TOUGHNESS 失效
公开(公告)号：JPH1088291A
公开(公告)日：1998-04-07
申请号：JP23902296
申请日：1996-09-10
申请人： MITSUBISHI HEAVY IND LTD
发明人： KADOYA YOSHIKUNI , KAWAI HISATAKA , UMAGOE RYUTARO
IPC分类号： C21D6/00 , C22C38/00 , C22C38/22 , C22C38/26 , C22C38/30 , C22C38/32 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a heat resistant cast steel having high strength and high toughness, applicable to steam turbine casings, precision cast blades, and valves. SOLUTION: This heat resistant cast steel is formed of a heat resistance cast steel having a composition consisting of, by weight ratio, 0.08-0.25% carbon, >0.1-0.5% silicon,

67. 发明专利

JPH1036944A MARTENSITIC HEAT RESISTANT STEEL 失效
公开(公告)号：JPH1036944A
公开(公告)日：1998-02-10
申请号：JP19124396
申请日：1996-07-19
申请人： MITSUBISHI HEAVY IND LTD , KOBE STEEL LTD
发明人： UMAGOE RYUTARO , KAWAI HISATAKA , SAKON TOSHIO , KADOYA YOSHIKUNI , YASUMOTO YASUHIKO , TSUCHIYAMA TOMOHIRO
IPC分类号： C22C38/00 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To produce a martensitic heat resistant steel having excellent fracture strength at high temps. of >600 deg.C and capable of maintaining the high temp. strength for a long time. SOLUTION: This steel has a chemical compsn. composed of, by weight, 0.05 to 0.15% C, 0.01 to 0.10% Si,

68. 发明专利

JPH08246901A THERMAL INSULATION COATING FILM EXCELLENT IN OXIDATION RESISTANCE 失效
公开(公告)号：JPH08246901A
公开(公告)日：1996-09-24
申请号：JP5409795
申请日：1995-03-14
申请人： MITSUBISHI HEAVY IND LTD
发明人： KADOYA YOSHIKUNI , KAWAI HISATAKA
IPC分类号： F01D5/18 , F01D5/28 , F01D9/02 , F02C7/00 , F02C7/24 , F23R3/42
摘要： PURPOSE: To enhance oxidation resistance under a high temperature condition, and restrain the occurrence of separation by improving adhesion by forming a ceramic layer by using specific raw material powder, and arranging a specific treatment layer in a boundary part between a metallic bond layer and the ceramic layer. CONSTITUTION: An MCrAlY metallic bond layer 2 is formed on a heat resistant alloy base material 1, and a ceramic covering layer 4 is formed on this metallic bond layer 2. The ceramic layer 4 is formed by using ZrO raw material powder which contains powder having a particle diameter of (-)140/(+)200mesh (74 to 105μm) by 10% or more and powder of (-) 200/(+) 325 mesh (44 to 74μm) by 40% or more and is stabilized by one or more kinds of stabilizing agents selected from a group composed of CaO, MgO, Y2 O3 , CeO2 and SiO2 . A processing layer 3 selected from a group composed of an Al2 O3 , MgO, Y2 O3 , MgO.SiO2 and AlCo type intermetallic compound, is interposed in a boundary part between the metallic bond layer 2 and the ceramic layer 4. Therefore, durability is remarkably improved.

69. 发明专利

JPH08189304A GAS TURBINE STATIONARY BLADE 失效
公开(公告)号：JPH08189304A
公开(公告)日：1996-07-23
申请号：JP187295
申请日：1995-01-10
申请人： TOHOKU ELECTRIC POWER CO , MITSUBISHI HEAVY IND LTD
发明人： SATO MINORU , KOBAYASHI YUICHI , KAWAI HISATAKA , AOKI SUNAO , AKITA EIJI
IPC分类号： F01D9/02
摘要： PURPOSE: To improve a material strength characteristic and to facilitate manufacture by connecting a blade part consisting of a unidirectional coagulated material growing a columnar crystal in the blade height direction and a shroud part consisting of a unidirectional coagulated material growing a columnar crystal orthogonal with the direction where thermal stress is the highest to each other. CONSTITUTION: A blade part 1 is cast of an Ni group alloy for unidirectional coagulation. Crystal grains (columnar crystal) are made to grow in the blade height direction, and the blade height direction is made to match with a direction where a Young's modulus of a unidirectional coagulated material is small (001). Additionally, an inside shroud part 2 is made to match with the direction where the Youngs's modulus is small (001) by growing the crystal grains (columnar crystal) in a direction where thermal stress becomes the maximum by the Ni group alloy for unidirectional coagulation in the same way. Furthermore, an outside shroud part 3 is manufactured of the unidirectional coagulated material in the same way as the inside shroud part 2. A fabricated frame structural type gas turbine stationary blade is manufactured by assembling the blade part 1, the inside shroud part 2 and the outside shroud part 3 and respectively connecting connecting parts 4, 4' with a blazing filler material.

70. 发明专利

JPH08170502A GAS TURBINE STATIONARY BLADE 失效
公开(公告)号：JPH08170502A
公开(公告)日：1996-07-02
申请号：JP30748394
申请日：1994-12-12
申请人： MITSUBISHI HEAVY IND LTD , TOHOKU ELECTRIC POWER CO
发明人： KAWAI HISATAKA , AOKI SUNAO , AKITA EIJI , ASANO HIROSHI
IPC分类号： F01D9/02
摘要： PURPOSE: To provide a gas turbine stationary blade which can be easily manufactured, and whose thermal fatigue life can be improved. CONSTITUTION: A blade part 1 is formed of a one-way solidified material in which columned crystal is developed in the direction of blade height, and an inner circumferential side shroud part 2 and an outer circumferential side shroud part 3 which are respectively arranged on the inner/outer circumferential sides of the blade part 1, are formed of equi-axed crystal materials separately from the blade part 1. A gas turbine stationary blade is assembled by the blade part 1 and the shroud parts 2, 3, and connecting parts 4, 4' between the blade part 1 and the shroud parts 2, 3, are connected by brazing metal or welding so that a built-up structure is prepared. Hereby, the blade part 1 can be strengthened in its thermal fatigue life, and also the shroud parts 2, 3 can be uniformed and fined in their metallographic structures so that material strength characteristics can be extremely excelled.

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