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1. 发明专利

JP2002213356A REFRIGERANT COMPRESSOR, AIR CONDITIONER AND REFRIGERATOR USING THE SAME, AND ITS BEARING 审中-公开
公开(公告)号：JP2002213356A
公开(公告)日：2002-07-31
申请号：JP2001328864
申请日：2001-10-26
申请人： HITACHI LTD , TOYO TANSO CO
发明人： TAKAYASU HIROSHI , BABA NOBORU , NAKAJIMA SHOICHI , TAGUCHI MASAMITSU , IIZUKA TADASHI , YAMANAKA TOSHIAKI , OHASHI MASABUMI , OGURA HIROAKI , FUKUDA TOSHIOMI , OZAKI SHINICHI
IPC分类号： F04B39/00 , F04C18/356 , F04C29/00 , F04C29/02 , F16C9/02
摘要： PROBLEM TO BE SOLVED: To provide a refrigerant compressor of long life using a bearing material having high abrasion resistance and seizure-resistance, and to provide an air conditioner and a refrigerator using the same, and its bearing. SOLUTION: In this compressor compressing the refrigerant by a pump driven by a crank of a rotating shaft, and repeating the liquefaction and evaporation for refrigerating, the air conditioner and the refrigerator using the same, and the bearing, at least one of bearings to the rotating shaft and the crank is made of a material prepared by impregnating pores of a carbonaceous base including graphite of 20-50 wt.%, with one kind of metal selected from the IB, VIII excluding Fe, and Sn, or an alloy mainly composed of the metal, the carbonaceous base includes graphite of 20-50 wt.%, Shore hardness of the member is 65-120, a porosity of the member is 0.05-2 vol.%, and the metal or the alloy of the member includes at least one of V and Ti by 2.0 wt.% or less.

2. 发明专利

JP2000073182A WEAR RESISTANT MEMBER, ITS PRODUCTION AND USE 失效
公开(公告)号：JP2000073182A
公开(公告)日：2000-03-07
申请号：JP24469498
申请日：1998-08-31
申请人： HITACHI LTD
发明人： TAKAYASU HIROSHI , NAKAJIMA SHOICHI , TAGUCHI MASAMITSU
IPC分类号： F04C29/00 , C23C26/00 , F04C18/356
摘要： PROBLEM TO BE SOLVED: To increase the lubrication of the surface by simple surface treatment at a low cost and to reduce the wear at the time of fitting characteristic of the sliding part of a sliding body, on the surface of a ferrous base material, by transfer forming a coating layer of Al or the like softer than that and having a low friction coefficient in such a manner that the metals are rubbed with each other. SOLUTION: On the surface of a ferrous base material such as carbon steel, austenitic stainless steel, martensitic stainless steel or the like, a coating layer softer than the ferrous base material and having a low friction coefficient such as Al, Sb, Pb, Sn, Ag, Cu, Zn, In, their alloys, graphite or the like is transfer formed by friction. This transfer formation can be executed, e.g. while a base material 1 and a transfer material 2 to form into a coating layer are subjected to pressure adhesion, by rotating either, e.g. the base material 1 and rubbing them and forming a coating layer composed of an alloy layer of the base material 1 and the transfer material 2 on the surface of the base material 1 to a thickness of about 0.5 to 5 μm. In this way, the sliding member good in initial fitness, high in heating resistance, enough in wear resistance and capable of contributing to the prolongation of the service life can be obtd.

3. 发明专利

JPH08333670A FIXING AND ROCKING PARTS OF HYDRAULIC MACHINERY AND PRODUCTION THEREOF 失效
公开(公告)号：JPH08333670A
公开(公告)日：1996-12-17
申请号：JP14027595
申请日：1995-06-07
申请人： HITACHI LTD
发明人： USAMI KENICHI , TAKAYASU HIROSHI , NAKAMURA SHIGEYOSHI , NIIKURA KAZUO
IPC分类号： F03B3/18 , C23C4/04 , C23C4/18 , F03B11/00
摘要： PURPOSE: To reduce the wear damage of the flowing water surface of a machinery member caused by the collision with earth and sand and the cutting operation and to attain the improvement of the service life of the parts and the improvement of the reliability thereof. CONSTITUTION: On the surface of the fixing and rocking parts of the hydraulic machinery, a hard thermal spraying coating layer 37 in which carbide and oxide ceramics are contained by 70 to 90% in metals or alloys if nickel, chromium and cobalt and having >=800HV Vickers hardness is formed, or, moreover, for increasing the hardness and earth and sand wear resistance of the thermal spraying coating layer 37, after the thermal spraying, heating treatment is executed in the temp. range of 350 to 650 deg.C.

4. 发明专利

JPH08254173A WATER TURBINE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH08254173A
公开(公告)日：1996-10-01
申请号：JP9797696
申请日：1996-04-19
申请人： HITACHI LTD
发明人： USAMI KENICHI , TAKAYASU HIROSHI , SATO KOJI , FUKUI HIROSHI , AKAHORI KIMIHIKO , SATO JOSHIRO , KIKUCHI KEIZO
IPC分类号： F03B3/12 , B23K9/04 , B23K10/02 , B23K35/32 , F03B11/04
摘要： PURPOSE: To suppress the occurrence of cavitation and sand wear by a method wherein composite powder of austenite stainless steel and metal carbide ceramics is used, and a padding layer having a coagulation texture structure wherein ceramics particles remain is formed on the surface of an apparatus member surface. CONSTITUTION: A runner body being the moving vane of a water turbine has a plurality of vanes 3 located between a crown 1 and a shroud 2, and provided with a runner cone 4, guide vanes 5, stay vanes 6, a runner liner 7, and a facing plate 8. In this case, a member having a padding weld layer having cavitation resistance higher than that of a parent material is arranged at a part on which an impact by flow water is exerted. A padding weld layer forms a metal texture having a matrix of austenite stainless steel and dispersing carbide. Further, the austenite stainless steel contains 0.05-0.15wt.% C, 0.2-1.0% Si, 7-13wt.% Mn, 2-7wt.% Ni, and 17-23wt.% Cr or is a steel containing 1-3wt.% Mo or other.

5. 发明专利

JPH081375A FLUID EQUIPMENT 失效
公开(公告)号：JPH081375A
公开(公告)日：1996-01-09
申请号：JP15824794
申请日：1994-06-17
申请人： HITACHI LTD
发明人： USAMI KENICHI , TAKAYASU HIROSHI , KONUMA TSUTOMU , KARITA MAKOTO
IPC分类号： F03B3/02 , B23K9/04 , B23K35/30
摘要： PURPOSE:To provide a fluid equipment where the work hardenability is improved, the corrosion resistance is excellent, the matrix is stabilized and micronized, and the cavitation resistance is excellent by forming a clad layer by welding of the austenitic steel containing a specific composition on the surface of the fluid equipment made of 13 Cr martensitic stainless steel. CONSTITUTION:In a fluid equipment to be used for the river water or sea water, the clad layer by welding made of austenitic steel having the composition consisting of, by weight, 0.10-0.30% C, >=1% Se,

6. 发明专利

JPH07207713A SEDIMENT EXCAVATION MACHINE AND TOOTH MEMBER FOR SEDIMENT EXCAVATION 失效
公开(公告)号：JPH07207713A
公开(公告)日：1995-08-08
申请号：JP183594
申请日：1994-01-13
申请人： HITACHI LTD , HITACHI CONSTRUCTION MACHINERY
发明人： USAMI KENICHI , TAKAYASU HIROSHI , NAKAMURA SHIGEYOSHI , ONO TOSHIHIRO
IPC分类号： C21D6/00 , C21D9/00 , C21D9/22 , E02F9/28
摘要： PURPOSE:To improve abrasion resistance as an excavation tooth by melting and forming steel having the prescribed composition into a tooth shape and, then, hardening and tempering the steel within the prescribed temperature zone. CONSTITUTION:A steel material containing each of elements such as C, Si, Mn, P, S, Ni, Cr, Mo, B, V, and Nb within the range of the prescribed weight percentage is used as the material of an excavation tooth 1 plugged into an adapter 3 mounted on a bucket 3 and secured with a lock pin 4. The steel material having such a composition is melted and formed into the prescribed shape as the tooth 1 and, then, subjected to thermal treatment within the zone of temperature including 900 to 1000 deg.C hardening treatment and 300 to 600 deg.C tempering treatment. Also, material hardness can be enhanced by using such a material as having Vickers hardness kept between 550 and 700, and further having a mixed composition where a complex carbide mainly composed of Nb is precipitated into a matrix of tempered martensite, thereby contributing to the wear resistance of an excavation tooth member.

7. 发明专利

JPH03107577A HYDRAULIC TURBINE AND HYDRAULIC TURBINE BUCKET 失效
公开(公告)号：JPH03107577A
公开(公告)日：1991-05-07
申请号：JP24220389
申请日：1989-09-20
申请人： HITACHI LTD
发明人： USAMI KENICHI , SATO KOJI , TAKAYASU HIROSHI
IPC分类号： F03B3/12 , B23K1/19 , C21D7/06 , C22C38/00 , C22C38/58 , F03B11/04
摘要： PURPOSE:To reduce cavitation, erosion, sediment abrasion, and combined failure thereof by forming a specified flowing water part in an hydraulic turbine with a stainless steel having a specified working hardenability and a specified composition. CONSTITUTION:A flowing water part in an hydraulic turbine, which is given with cavitation, erosion, sediment abrasion, and combined failure thereof, for example, a blade is formed by silver-brazing a steel plate 10 made of a specified stainless steel 9. The specified stainless steel 9 has mainly an austenite structure. A Vickers hardness of the material thereof is 230 or more, the steel 9 has high working hardenability which the Vickers hardness exceeds 400 or more by the impact of flowing water and sediment. ln a specified stainless steel 9, it contains C: 0.07 to 0.2%, Si: 2% or less, Mn: 7 to 15 %, Ni: 1 to 7%, Cr: 20 to 25%, and W: 0.1 to 3% of a percent by weight, while the residual part thereof is made of Fe and an accompanying non-elimination impurity.

8. 发明专利

JPH02230968A WATER TURBINE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH02230968A
公开(公告)日：1990-09-13
申请号：JP28893389
申请日：1989-11-08
申请人： HITACHI LTD
发明人： USAMI KENICHI , TAKAYASU HIROSHI , SATO KOJI , FUKUI HIROSHI , AKAHORI KIMIHIKO , SATO JOSHIRO , KIKUCHI KEIZO
IPC分类号： F03B11/04 , B23K9/04 , B23K10/02 , B23K35/32 , F04D29/22
摘要： PURPOSE:To prevent the corrosion of an apparatus and improve the life by using a metal organization dispersed with a carbide in a matrix made of austenite stainless steel for a deposit welding layer with high cavitation resistance. CONSTITUTION:In a water turbine provided with a guide vane 5 adjusting the flow of flowing water and a runner rotated by flowing water, a deposit welding layer 10 with cavitation resistance higher than that of a base material is applied to a portion applied with shocks by flowing water, e.g. the guide vane 5. A mixture of austenite stainless steel powder and metal carbide ceramic powder is melted by a plasma arc and fed to a welded portion, and the deposit welding layer 10 is formed at the desired thickness while a pool of molten metal is generated at this portion. The corrosion by cavitation and abrasion by sediment are suppressed, and the life can be extended.

9. 发明专利

JPS63270445A SEDIMENT WEAR RESISTANT STEEL 失效
公开(公告)号：JPS63270445A
公开(公告)日：1988-11-08
申请号：JP10194087
申请日：1987-04-27
申请人： HITACHI LTD
发明人： SATO KOJI , KONUMA TSUTOMU , MATSUMOTO TOSHIMI , TAKAYASU HIROSHI , KIKUCHI KEIZO
IPC分类号： C22C38/00 , C22C38/52 , C22C38/58
摘要： PURPOSE:To obtain a sediment wear resistant steel suitable as a hydraulic turbine for sediment contg. place by specifying the compsn. consisting of C, Si, Mn, Ni, Co, Cr, Mo, N and Fe. CONSTITUTION:The titled steel consists of a metallic material contg., by weight 0.05-0.2% C, >=2% Si, 7-20% Mn, 2-10% Ni, 6-13% Co, 17-30% Cr, 1-3% Mo and 0.05-0.3% N, regulated with 0.6-1.3% said (Mn+Co)/Cr and consisting of the balance Fe with inevitable impurities and has an austenite or austenite + ferrite structure. The steel is used by forming it onto the surface of a member to be subjected to sediment wear. The formation on the surface of said member is preferably performed by build up welding. The titled steel is applied to a running water member of a hydraulic turbine for sediment contg. places, etc., by which the sediment wear resistance is improved, the lowering of the efficiency of the apparatus is decreased and the service life thereof is improved.

10. 发明专利

JPS62179877A DIFFUSED JUNCTION METHOD FOR STAINLESS STEEL AND TI 失效
公开(公告)号：JPS62179877A
公开(公告)日：1987-08-07
申请号：JP2012586
申请日：1986-02-03
申请人： HITACHI LTD
发明人： TAKAYASU HIROSHI , KONUMA TSUTOMU , OGURA SATOSHI
IPC分类号： B23K20/00
摘要： PURPOSE:To improve the nitric acid resistance and strength on the joining part of the container in which the nitric acid of high concentration exists by providing the intermediate material which forms the total rate solid solution with stainless steel to the stainless steel side and the intermediate material which forms the total rate solid solution with both intermediate products of Ti and stainless steel side on the Ti side and joining both intermediate materials. CONSTITUTION:This invention is a method to prevent the generation of the reduction in the mechanical property and reduction in local nitric acid resistance due to the existance of the various intermetallic compounds which are formed at the vicinity of the junction part in case of joining SUS 304L base metal and Ti base metal. Namely in case of performing the diffused junction of SUS 304L of the base metal 1 and the Ti of the base metal 2, the diffused junction is performed with the prescribed joining temp., pressure, joining time and degree of vacuum by interposing V at the SUS 304L side of the base metal 1 and Mo at the Ti side of the base metal 2 respectively, taking into consideration of the formation of the intermetallic compound. In this way it can be restrained that the intermetallic compound compound which is in fear of its weakness and the reduction in the nitric acid resistance is generated on the junction part.

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