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1. 发明专利

JPH0593205A PRODUCTION OF ALUMINUM SINTERED ALLOY PART 失效
公开(公告)号：JPH0593205A
公开(公告)日：1993-04-16
申请号：JP25267691
申请日：1991-10-01
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： KAMITSUMA YASUO , NAKAGAWA YUSAKU , KOBAYASHI YOSHIHIRO , NAKAJIMA SHOICHI , IIZUKA TADASHI , NAKAMURA KEIICHI , YOMO HIDEO
IPC分类号： B22F3/10 , B22F3/105 , B22F3/14 , B22F5/00 , C22C1/04 , C22C21/02 , F04C18/02
摘要： PURPOSE:To obtain a product which is lightweight and inexpensive and has high strength with simple equipment while reducing the working manhour at the time of producing a part of intricate shape such as a spiral part from an Al alloy powder. CONSTITUTION:An effective component is added to Al, the admixture is quenched and solidified to obtain the powder. The powder is compacted, and the compact is electrically heated, sintered by a plasma discharge and pressed into a high-density shaped material. Consequently, a part of intricate shape such as a spiral part which is lightweight and has high strength and toughness is efficiently and inexpensively produced from an Al-Si-based sintered alloy with a simple process.

2. 发明专利

JPS63282221A MANUFACTURE OF COMPOSITE SINTERED MATERIAL 失效
公开(公告)号：JPS63282221A
公开(公告)日：1988-11-18
申请号：JP11682087
申请日：1987-05-15
申请人： HITACHI LTD , HITACHI POWDERED METALS , HITACHI KOKI KK
发明人： KAMITSUMA YASUO , MATSUZAKA KYO , KIKUCHI ATSUSHI , KOBAYASHI YOSHIHIRO , ISHI ISAO , ENDO HIROYUKI , TAKADA TAMIO , YOMO HIDEO , ABE TAKAO
IPC分类号： C22C1/05 , C22C9/00
摘要： PURPOSE:To develop a Cu-base composite material excellent in wear resistance even in lubricant free state, by mixing a graphite powder of a specific grain size whose surface is plated with Cu with a metallic powder mixture composed principally of Cu powder and by subjecting the resulting powder mixture to compacting, to sintering, and further to recompacting. CONSTITUTION:A uniform powder mixture consisting of, by weight, 3-20% of graphite powder which is coated with Cu by electroplating or electroless plating and in which aspect ratio and grain size are regulated to 4-8 and 50-400mum, respectively, and respective powders of Sn, Pb, Zn, Bi and Fe and the balance Cu powder is compacted at 4-7ton/cm pressure into the prescribed shape. The resulting green compact is sintered at 700-850 deg.C, and the sintered compact is recompacted under 4-7ton/cm pressure again. By this method, the Cu-base composite material in which graphite acts as solid lubricant and, as a result, which has superior wear resistance even in lubricant free state and is suitable for bearing, etc., can be obtained.

3. 发明专利

JPS61276963A MECHANISM UNDERGOING FRICTION IN WATER 失效
公开(公告)号：JPS61276963A
公开(公告)日：1986-12-06
申请号：JP11995285
申请日：1985-06-03
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： KAMITSUMA YASUO , ABE TAKAO , MATSUZAKA KYO , MASE NORIAKI , YOSHIKAWA KAZUAKI , HAYASAKA TADAO
IPC分类号： C23C8/26 , B22F5/00 , C22C1/05 , C23C8/50 , F16C33/12 , F16C33/24 , F16J15/34
摘要： PURPOSE:To improve the wear resistance of a mechanism undergoing friction in water by using an iron-base material having a prescribed surface hardness by nitriding and a composite material consisting of silicon-base ceramics, carbon and nickel to form a sliding body and a fixing member for sealing and fixing the sliding body in the mechanism. CONSTITUTION:This mechanism undergoing friction in water is composed of a sliding body and a fixing member for sealing and fixing the sliding body. One of the constituent parts is made of an iron-base material and the other is made of a composite material consisting of silicon-base ceramics, carbon and nickel. Stainless steel having >=800 surface hardness Hv by nitriding on the surface contacting with the opposite material is used as the iron-base material.

4. 发明专利

JPS62127454A WEAR-RESISTANT COMPOSITE SINTERED MATERIAL 失效
公开(公告)号：JPS62127454A
公开(公告)日：1987-06-09
申请号：JP26795085
申请日：1985-11-28
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： ABE TAKAO , KAMITSUMA YASUO , MATSUZAKA KYO , ENDO HIROYUKI
IPC分类号： B22F3/24 , B22F5/00 , C22C33/02 , C22C38/00 , C22C38/02 , C22C38/58
摘要： PURPOSE:To obtain a wear-resistant composite sintered material capable of withstanding severe friction conditions, by specifying a composition consisting of carbide, nitrides, or oxides and of graphite and Fe. CONSTITUTION:The wear-resistant composite sintered material has a composition consisting of, by weight, 5-25% of one or more kinds among carbides, nitrides, and oxides, 2-15% graphite, and the balance Fe and is excellent in wear resistance and strength. As the above carbides, SiC, WC, VC, MoC, etc., are used, and particularly, SiC is preferred. Moreover, SiN, AlN, BN, etc., are used as the nitrides, and Al2O3, etc., are used as the oxides. These are all hard and therefore effective for wear resistance. Further, graphite functions as solid lubricant. Above-mentioned sintered material can be obtained by blending each powdery raw material having the above prescribed composition, by mixing the above with the addition of about 1% of zinc stearate, by compacting the mixture, and by subjecting the resulting green compact to temporary sintering, to recompacting, and then to sintering in an Ar gas at about 1,000 deg.C. Moreover, strength and wear resistance can be improved to a greater extent by subjecting the above composite material to temper heat treatment after sintering.

5. 发明专利

JPS6296367A SILICON CARBIDE BASE FRICTION MECHANISM MEMBER 失效
公开(公告)号：JPS6296367A
公开(公告)日：1987-05-02
申请号：JP23522185
申请日：1985-10-23
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： ABE TAKAO , KAMITSUMA YASUO , MATSUZAKA KYO , SUZUKI YASUTAKA , MAEDA KUNIHIRO , ENDO HIROYUKI
IPC分类号： C04B35/565 , C04B35/56 , C04B35/58 , C04B35/583

6. 发明专利

JPH0625782A HIGH DUCTILITY ALUMINUM SINTERED ALLOY AND ITS MANUFACTURE AS WELL AS ITS APPLICATION 失效
公开(公告)号：JPH0625782A
公开(公告)日：1994-02-01
申请号：JP7964391
申请日：1991-04-12
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： KAMITSUMA YASUO , NAKAGAWA YUSAKU , CHIKAZAKI MITSUO , IIZUKA TADASHI , INABA KOICHI , NAKAMURA KEIICHI , MITSUBE MASANORI , KAGAYA TAKESHI
IPC分类号： C22C21/00 , C22C1/04 , C22C21/02 , C22C30/00 , F02F3/00 , F04C18/02 , F16D65/12
摘要： PURPOSE:To provide an Al-Si sintered alloy having high strength and high ductility, to provide its manufacturing method and to provide its application. CONSTITUTION:This sintered alloy is constituted of 1 to 45% Si, 0.1 to 20% IIIa group elements and 0.01 to 5% of at least one kind among IVa group and Va group elements, and the balance substantial Al. Furthermore, one or more kinds among 0.01 to 5% Cu, 0.01 to 5% Mg, h2.0% Fe, =40kg/mm tensile strength at 150 deg.C and >=.5% elongation percentage can be obtd.

7. 发明专利

JPS61279653A NI-BASE COMPOSITE MATERIAL EXCELLENT IN WEAR RESISTANCE AND CORROSION RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPS61279653A
公开(公告)日：1986-12-10
申请号：JP12106685
申请日：1985-06-04
申请人： HITACHI LTD , HITACHI POWDERED METALS
发明人： ABE TAKAO , KAMITSUMA YASUO , MATSUZAKA KYO , HAYASAKA TADAO , ENDO HIROYUKI , SUZUKI KEITARO
IPC分类号： C22C19/03 , C22C1/05 , C22C32/00 , C22C47/14
摘要： PURPOSE:To obtain a composite member excellent in corrosion resistance as well as wear resistance by blending each powder of SiC, C and Ni, compacting the mixture, presintering the green compact and then subjecting the resulting presintered compact to recompacting and resintering. CONSTITUTION:The powdered SiC (5-35wt%), powdered C (3-10wt%) and powdered Ni (55-92wt%) are uniformly blended and the resulting mixture is compacted at a pressure of 3-7 ton/cm . The green compact is presintered at 400-600 deg.C. Subsequently, the presintered compact is recompacted at a pressure of 7-9 ton/cm and then resintered at 800-900 deg.C. In this way, an Ni-base composite material excellent in wear resistance even in an oil free state and also having superior corrosion resistance even in an atmosphere containing water can be stably manufactured.

8. 发明专利

JPH09228972A IRON SLIDE PART OF COMPRESSOR, ITS SURFACE TREATMENT METHOD AND COMPRESSOR 失效
公开(公告)号：JPH09228972A
公开(公告)日：1997-09-02
申请号：JP34713096
申请日：1996-12-26
申请人： HITACHI LTD
发明人： IIZUKA TADASHI , FUKUDA KAZUJI , ISHIHARA SHIN , KAMITSUMA YASUO , NAKAGAWA YUSAKU
IPC分类号： F04C29/00 , C23C8/34 , F04B39/00 , F04C18/356
摘要： PROBLEM TO BE SOLVED: To improve resistance against wear of a compressor which is compact, provides high output, and has high performance by forming a slide face consisting of an oxygen nitrided layer and a multiporous oxidized iron film of which main component is triiron tetroxide sequentially on a surface of a base in an iron slide part which constitutes a compression mechanism which compresses refrigerant fluid. SOLUTION: In a compressor in which a compression mechanism which compresses refrigerant fluid is formed by a plurality of opposing iron slide parts and refrigerating machine oil is supplied to a slide part of the slide parts when liquid is compressed, either or both of slide faces of the iron slide parts are treated by oxygen nitriding in a mixture gas containing 0.5 to 5% of air in ammonia gas at 450 deg. to 650 deg.C, and then an oxygen nitrided layer 22 in which particlelike nitride iron and oxidized iron coexist is formed on a surface of a base 24. Next, steam treatment is done at 400 deg. to 800 deg.C to inflate oxidized iron so that a multiporous oxidized iron film 21 of which main component is triiorn tetroxide and has a thickness of 0.1 to 10μm is formed on a top layer of the oxygen nitrided layer 22. Consequently, it is possible to improve the burning property and the adhesion property between slide members.

9. 发明专利

JP2510639B2 失效
公开(公告)号：JP2510639B2
公开(公告)日：1996-06-26
申请号：JP32692887
申请日：1987-12-25
申请人： HITACHI LTD
发明人： ISHIHARA SHIN , HATAKE HIROAKI , IIZUKA TADASHI , KAMITSUMA YASUO , NAKAGAWA JUSAKU , IWATA HIROSHI
IPC分类号： F04C29/00 , F04C29/02

10. 发明专利

JPH0550638B2 失效
公开(公告)号：JPH0550638B2
公开(公告)日：1993-07-29
申请号：JP27238386
申请日：1986-11-15
申请人： HITACHI LTD
发明人： ISHIKAWA TOORU , KAMITSUMA YASUO
IPC分类号： F16K31/06 , C25D5/14 , F02M51/06 , F02M51/08

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