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91. 发明专利

JPH10204562A LARGE-SIZE CASTING MADE OF COLUMNAR CRYSTAL NI-BASED HEAT RESISTANT ALLOY, EXCELLENT IN HIGH TEMPERATURE INTERGRANULAR CORROSION RESISTANCE 失效
公开(公告)号：JPH10204562A
公开(公告)日：1998-08-04
申请号：JP1034697
申请日：1997-01-23
申请人： MITSUBISHI MATERIALS CORP , MITSUBISHI HEAVY IND LTD
发明人： MITSUHASHI AKIRA , WAKITA SABUROU , MASUMI MICHI , KAWAI HISATAKA , OKADA IKUO , TAKAHASHI KOUJI
IPC分类号： C22C19/05 , F01D5/28 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To provide a large-size casting made of columnar crystal Ni-based heat resistant alloy for turbine blade, usable as turbine blade for gas turbine. SOLUTION: This casting has a composition consisting of 12.0-14.3% Cr, 8.5-11.0% Co, 1.0-3.5% Mo, 3.5-6.2% W, 3.0-5.5% Ta, 3.5-4.5% Al, 2.0-3.2%, Ti, 0.04-0.12% C, 0.005-0.05% B, 0.001-5ppm Zr, and the balance Ni with inevitable impurities and further containing, if necessary, one or >=2 kinds among the following (a) and (b): (a) 0.5-100ppm of Mg and/or Ca; (b) one or >=2 kinds among 0.02-0.5% Pt, 0.02-0.5% Rh, and 0.02-0.5% Re.

92. 发明专利

JPH1046277A COLUMNAR NI BASE HEAT RESISTANT ALLOY CASTING AND TURBINE BLADE MADE OF THE SAME 失效
公开(公告)号：JPH1046277A
公开(公告)日：1998-02-17
申请号：JP1034597
申请日：1997-01-23
申请人： MITSUBISHI MATERIALS CORP , MITSUBISHI HEAVY IND LTD
发明人： MIHASHI AKIRA , WAKITA SABURO , KAWAI HISATAKA , TAKAHASHI KOJI , OKADA IKUO
IPC分类号： C22C19/05
摘要： PROBLEM TO BE SOLVED: To produce a columnar Ni base heat resistant alloy casting usable as the turbine blade of a gas turbine. SOLUTION: This columnar Ni base heat resistant alloy casting has a compsn. contg., by weight, 10 to 14% Cr, 6 to 13% Co, 0.5 to 4% Mo, 1 to 6.2% W, 3 to 8% Ta, 2.5 to 6% Al, 0.5 to 4% Ti, 0.3 to 1.8% Hf, 0.03 to 0.20% C, 0.005 to 0.03% B, 0.001 to 0.03% Zr, and the balance Ni with inevitable impurities and has a structure in which carbides 4 are dispersed into the spaces among the dendrite structure in the matrix, on the grain boundaries 1 and in the dendrite structure 3. The content (atomic %) of Hf contained in the carbides 4 dispersed in the dendrite structure in the matrix is regulated to 3 to 20 times the content (atomic %) of Hf contained in the carbides dispersed among the spaces of the dendrite structure and on the grain boundaries.

93. 发明专利

JPH09281018A CREEP RUPTURE TESTER IN COMBUSTION GAS 失效
公开(公告)号：JPH09281018A
公开(公告)日：1997-10-31
申请号：JP11203796
申请日：1996-04-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： DATE SHINGO , KAWAI HISATAKA
IPC分类号： G01N3/00 , G01N3/18
摘要： PROBLEM TO BE SOLVED: To perform a creep rupture test by heating only a test piece to 1000 deg.C or higher in combustion gas by applying load to the cylindrical test piece of which the inner end is closed in the combustion gas through the hollow center press rod through which compressed air is passed inserted into the test piece. SOLUTION: A first hollow attaching jig 2L is fitted in the through-hole of a hot gas chamber 7 and the upper end of a cylindrical test piece 5 of which the lower end is closed is fixed to the lower end of the center hole provided to the jig 2L in a detachable manner. A hollow center press rod 4 having a plurality of small holes 16 provided to the part corresponding to the test piece 5 thereof is inserted into the center hole 5a of the test piece 5 and tensile load controlled by a load cell 6 and a control unit 9 is applied to the test piece 5 by the load applying device 23 arranged to the upper end of the jig 2L. Compressed air is allowed to flow out of the small holes 16 through the center hole 4a of the press rod 4 and the test temp. of the test piece measured by a thermocouple 12a is regulated and set by a valve 13. The temp. of the press rod 4 is always lower than the test temp.

94. 发明专利

JPH0920976A MATERIAL RESISTANT TO CORROSION AND OXIDATION 失效
公开(公告)号：JPH0920976A
公开(公告)日：1997-01-21
申请号：JP16753495
申请日：1995-07-03
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWAI HISATAKA , MORIYA KEIICHI
IPC分类号： C23C4/08 , C23C28/02
摘要： PROBLEM TO BE SOLVED: To provide a material resistant to corrosion and oxidation, applicable to the moving blade and stationary blade of a gas turbine or the burner high- temp. parts of a boiler, having the resistance to oxidation and corrosion equivalent to or higher than the conventional material having an Al cementation layer and capable of being easily produced. SOLUTION: The metallic layer of MCrAlY (M consists essentially of one or >=2 kinds of elements among Ni, Co and Fe) is formed on the surface of a base material directly or by low-pressure plasma spraying, and then the metallic layer of a CoAl single-phase alloy contg. 44-56 atomic % Al or of an FeAl single-phase alloy contg. 34-48 atomic % Al is formed by low-pressure plasma spraying to constitute the material resistant to corrosion and oxidation.

95. 发明专利

JPH0676655B2 失效
公开(公告)号：JPH0676655B2
公开(公告)日：1994-09-28
申请号：JP9979086
申请日：1986-04-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HARADA YOSHIO , KAWAI HISATAKA , KOSAKU AKIRA
IPC分类号： C23C8/70

96. 发明专利

JPH0477378A COMPOSITE CERAMIC MEMBER 失效
公开(公告)号：JPH0477378A
公开(公告)日：1992-03-11
申请号：JP19083590
申请日：1990-07-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWAI HISATAKA
IPC分类号： C04B35/584 , C04B35/58 , C04B41/87
摘要： PURPOSE:To enhance strength, toughness and oxidation resistance by mixing a sintering adjuvant and producing sintered Si3N4 and forming a coated layer consisting of Si3N4 or SiC on the base material made of sintered Si3N4. CONSTITUTION:A sintering adjuvant such as Y2O3, MgO or ZrO2 is mixed at about 5-10wt.% and a sintered Si3N4 base material 02 is produced by a normal-pressure sintering method. A high-purity SiC coating layer 01 is formed at prescribed temp. on this Si3N4 base material 02 by a thermal plasma CVD method while utilizing SiH4 and CH4 as a gaseous raw material. Further, a high-purity Si3N4 coating layer 01 is formed at prescribed temp. by the thermal plasma CVD method while utilizing SiH4 and NH3 as the gaseous raw material. Since high-purity SiC and Si3N4 free from the sintering adjuvant react with oxygen contained in the atmosphere by heating at high temp. and a dense scale layer 04 consisting of SiO2 single substance is formed on the surface, a composite ceramics member is obtained which has high strength, high toughness and is excellent in oxidation resistance.

97. 发明专利

JPH01121612A BURNER APPARATUS FOR BOILER 失效
公开(公告)号：JPH01121612A
公开(公告)日：1989-05-15
申请号：JP27839987
申请日：1987-11-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISATO AKIHIRO , HIROTA TOMOKAZU , KAWAI HISATAKA , MORI MASAHIKO , TAKEISHI KENICHIRO
IPC分类号： F23D11/38 , F23D99/00
摘要： PURPOSE:To enhance wear-resistance of a burner tip mounted to a burner equipment for boiler in which low quality fuel oil containing coal or solids are employed, by producing the burner tip formed of wear-resistant material and connecting an auxiliary vapor feed line to the burner to cool down the burner tip. CONSTITUTION:Burner tip 2 mounted onto a burner gun 1 is formed of ceramics such as Si3N4, super alloy such as WC-CO, or wearresistant material such as cermet, which exhibits a resistance to corrosive fuel such as COM, CWM, etc., containing a mixture of fine carbon powder, oil, water or other impurities. An auxiliary vapor feed line 5 is connected to the burner to supply a smaller amount of vapor than that fed upon operation, and cool down a heated tip 2 for its insertion and removal before or after operation, which leads to prevention of damage thereto. When the tip 2 is attached to the burner, temperature of the tip initiates to rise. However, once a valve on the supply line 5 is opened, the temperature is allowed to cool down abruptly.

98. 发明专利

JPS64241A DEPOSITION HARDENING NI BASED SUPER HEAT RESISTANT ALLOY FOR POWDER METALLURGY 失效
公开(公告)号：JPS64241A
公开(公告)日：1989-01-05
申请号：JP15427387
申请日：1987-06-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： TSUJI ICHIRO , KAWAI HISATAKA
IPC分类号： C22C19/05
摘要： PURPOSE:To produce an Ni based super heat resistant alloy having high ductility in which the generation of PPB is prevented by prepg. the Ni based alloy contg. specific ratios of Cr, Co, Ti, Al, Mo, W, Ta, C and B. CONSTITUTION:The Ni based super heat resistant alloy contg., by weight, 12-20% Cr, 12-18% Co, 4-6% Ti, 1-4% Al, 2-5% Mo, 0.5-2.5% W, 0.25-1.5% Ta, 0.01-0.08% C,

99. 发明专利

JPS62256958A HEAT-AND EROSION-RESISTING MEMBER AND ITS PRODUCTION 失效
公开(公告)号：JPS62256958A
公开(公告)日：1987-11-09
申请号：JP9979086
申请日：1986-04-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HARADA YOSHIO , KAWAI HISATAKA , KOUSAKU AKIRA
IPC分类号： C23C8/70
摘要： PURPOSE:To form an Fe2B penetration layer excellent in resistance to heat and erosion, by coating the surface of a member made of martensitic heat- resisting steel with SiC powder, by coating the out-side of the above with a powder mixture of SiC, B4C, and KBF4, and by subjecting the coated surface to heating under specific conditions to undergo penetration treatment and then to cooling treatment. CONSTITUTION:The surface of a martensitic structure layer of heat-resisting steel parts such as nozzles, etc., of steam turbine for use in thermal power plant and unclear power plant is first coated with powdered SiC to 2-3mm thickness. The outside of the above is further coated to 10mm thickness with a powder mixture consisting of 1.5-6wt% powder mixture of B4c and KBF4 and the balance powdered SiC, which is heated at 900 deg.C for several hours in a nonoxidizing atmosphere such as Ar gas, etc., to undergo penetration treatment, followed by hardening treatment at >=20 deg.C/min cooling rate. In this way, the Fe2B penetration layer is formed on the surface of the martensitic structure layer to carry out surface hardening treatment, so that heat-resisting steel member excellent in resistance to heat and erosion can be manufactured.

100. 发明专利

JPS62246691A MANUFACTURE OF HEAT-INSULATING STRUCTURE 失效
公开(公告)号：JPS62246691A
公开(公告)日：1987-10-27
申请号：JP27345685
申请日：1985-12-06
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIDA TAKASHI , KAWAI HISATAKA , SANO TAMOTSU , IWAI KAZUHIRO
IPC分类号： F16L59/06

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