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21. 发明专利

JPH01146210A SUPERCONDUCTIVE WIRE ROD COMPOSED OF OXIDES 失效
公开(公告)号：JPH01146210A
公开(公告)日：1989-06-08
申请号：JP30316787
申请日：1987-12-02
申请人： HITACHI LTD
发明人： CHIBA YOSHITERU , MORIMOTO TADAOKI , KATO TAKAHIKO , OKADA MICHIYA , SATO HIROSHI , MATSUMOTO TOSHIMI , OKAYAMA AKIRA
IPC分类号： H01B12/02
摘要： PURPOSE:To make it easy to diffuse oxygen in a superconductive wire composed of oxides as well as to provide sufficient oxygen to superconductive materials of Y-Ba-Cu series by cladding a metallic wire with oxides having superconductivity, forming a superconductive layer composed of oxides thereafter, and cladding the outside thereof with a thin layer composed of metallic powder. CONSTITUTION:Oxygen to a superconductive material composed of oxides shall be supplied through a superconductive wire rod which prevents a superconductive layer 2 composed of oxides from being detached out of a metallic wire wherein the superconductive layer 2 composed of oxides is cladded with a metallic powder layer 3 after the superconductive layer 2 composed of oxides has been formed around the outer circumference of the metallic wire 1. As metals for the metallic wire 1 and metallic powder 3, silver or Cu-Al alloys are desirable, which are low in electric resistance and also low in reactivity with both oxygen and the superconductive material composed of oxides. This constitution thereby allows oxygen to be easily diffused, and also allows it to be supplied to the superconductive layer 2 with ease through the metallic powder layer 3 at the time of heat treatment in oxygen environment, thereby allowing the metallic wire excellent in superconductivity to be obtained.

22. 发明专利

JPH0197317A SYNTHESIS OF HIGH TEMPERATURE OXIDE SUPERCONDUCTOR WIRE 失效
公开(公告)号：JPH0197317A
公开(公告)日：1989-04-14
申请号：JP25368987
申请日：1987-10-09
申请人： HITACHI LTD
发明人： SATO HIROSHI , MORIMOTO TADAOKI , OKADA MICHIYA , OKAYAMA AKIRA , YANAI YOSHIMI , CHIBA YOSHITERU , MATSUMOTO TOSHIMI
IPC分类号： B28B1/00 , C01G1/00 , C01G3/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To stabilize the crystal structure of a superconductor material through restricting oxygen dissociation by burning raw material of powder in oxygen. CONSTITUTION:Mixed powder comprising two components of yttrium oxide and copper oxide or three components of yttrium oxide, barium carbonate and copper oxide is burned in oxygen. Thereafter, a metal pipe is filled with the mixed powder including barium peroxide, thus performing wire drawing and heat treatment. With this arrangement, it is possible to synthesize a high temperature oxide superconductor wire having a sectional structure enveloped in a metal sheath.

23. 发明专利

JPS63141603A CENTRIFUGAL THIN FILM DRIER 失效
公开(公告)号：JPS63141603A
公开(公告)日：1988-06-14
申请号：JP28664186
申请日：1986-12-03
申请人： HITACHI LTD
发明人： CHIBA YOSHITERU , MATSUMOTO TOSHIMI , KONUMA TSUTOMU , MIYAMOTO KAZUYUKI
IPC分类号： G21F9/08 , B01D1/22 , C02F1/08 , G21F9/00
摘要： PURPOSE:To prevent the deposition of scales on the heating surface of the title drier by providing many water spray nozzles on the main shaft of a blade rotating in a cylinder, and spraying water from the nozzles onto the heating surface of the cylinder. CONSTITUTION:The blade 8 rotated by the main shaft 7 is provided in the cylindrical heat-transfer drum 5. Many water spray nozzles 19 are prided on the main shaft 7. The deposition of scales on the heating surface 6 is prevented by spraying, vaporizing and expanding water to break the scales. In this case, the sprayed water is vaporized and discharged to the outside from a gas outlet 12. Since the scales are not deposited on the heating surface, the abrasion loss of the blade can be reduced.

24. 发明专利

JPS6345597A CENTRIFUGAL THIN-FILM DRIER 失效
公开(公告)号：JPS6345597A
公开(公告)日：1988-02-26
申请号：JP18847886
申请日：1986-08-13
申请人： HITACHI LTD
发明人： CHIBA YOSHITERU , MATSUMOTO TOSHIMI , OGURA SATOSHI , TANIDA SHOZO , MIYAMOTO KAZUYUKI
IPC分类号： F26B5/08 , G21F9/08 , G21F9/14

25. 发明专利

JPS55161592A WELDING METHOD OF STRUCTURE 失效
公开(公告)号：JPS55161592A
公开(公告)日：1980-12-16
申请号：JP6892679
申请日：1979-06-04
申请人： HITACHI LTD
发明人： IMAI KATSUYUKI , KIRIHARA SEISHIN , MATSUSHITA SHIZUO , CHIBA YOSHITERU
IPC分类号： B23K31/00
摘要： PURPOSE:To achieve the decrease in residual stress and the improvement in toughness by putting the post-welding heat-affected zone in direct contact with liquid refrigerant after its temperature becomes lower than the martensite transformation start temperature of its metal thereby cooling the same in the welding of the structure composed of the metal which becomes harden through hardening. CONSTITUTION:In the welding or repair welding of the structures composed of metals which become hard through hardening, particularly chemical plants and atomic reactor pressure vessels, the cooling after welding is accomplished after the temperature has lowered down to -150-400 deg.C below the martensite transformation point (Ms point). The cooling is accomplished by direct contacting with liquid refrigerant and water is most preferable for refrigerant. Further, at least two layers of welding is done, wherein the 1st layer welding is done by low heat input and the 2nd layer welding by large heat input. Thereafter, the build-up welding for the 3rd and subsequent layers is done at the heat input lower than that for the 2nd layer. In all cases, the foregoing cooling method is followed to cool the weld zone.

26. 发明专利

JPS5278730A PROCESS FOR WELDING AUSTENITE STAINLESS STEEL 失效
公开(公告)号：JPS5278730A
公开(公告)日：1977-07-02
申请号：JP15497975
申请日：1975-12-26
申请人： HITACHI LTD
发明人： KIRIHARA SEISHIN , IMAI KATSUYUKI , CHIBA YOSHITERU , KOYAMA KOUICHI
IPC分类号： B23K9/23 , B23K31/00

27. 发明专利

JP2002097913A INTERNAL COMBUSTION ENGINE AND PART USED FOR IT 失效
公开(公告)号：JP2002097913A
公开(公告)日：2002-04-05
申请号：JP2000295424
申请日：2000-09-25
申请人： HITACHI LTD , HITACHI KYOWA ENG CO LTD
发明人： SHINOHARA HIROYUKI , KIYOTOKI YOSHIHISA , KUMAGAI MAKOTO , CHIBA YOSHITERU , SAKAMOTO AKIRA , OGAWA SUKEHIRO
IPC分类号： F01L3/02 , C22C19/03 , C22C19/07 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of an engine and the corrosion resistance of a valve seat section under the corrosion environment caused by the sulfur content, etc., contained in the fuel for the engine by highly hardening the slide section of a valve for the engine and reducing the sliding resistance of the valve. SOLUTION: Co group alloy 13 having ball-shaped or granular eutectic carbide is liquid-phase-diffusion-bonded to the region having the sealing function of an intake and exhaust valve 5 and a valve seat 6 for the cylinder 10 of the engine.

28. 发明专利

JP2000130635A VALVE DEVICE 失效
公开(公告)号：JP2000130635A
公开(公告)日：2000-05-12
申请号：JP30504898
申请日：1998-10-27
申请人： HITACHI LTD , HITACHI KYOWA ENG CO LTD
发明人： IWATA YASUTAKA , CHIBA YOSHITERU
IPC分类号： F16K3/12 , F16K51/00
摘要： PROBLEM TO BE SOLVED: To improve the abrasion resistance and gas-tightness without increasing manufacturing costs by applying CrN or TiN ceramics coating treatment on basic materials of a valve box side seal part casted integrally with a valve box and valve element side seal part. SOLUTION: A valve device 1 has a valve box side slide part in which a valve element 2 made of cast steel and a valve box are integrated. A valve box 3 consists of a valve box main body 5 having a pair of pipe connection parts 4 and a lid member 6 covering its upper part. The valve element 2 opens and closes a flow passage P of both pipe connection part 4 by the operation of a rotary handle 8 through a valve stem 7, and ceramics coating 2c is applied on peripheral parts of both circular sides 2a, 2b facing the flow passage P of the valve element 2, namely, the whole of a seal part. In the ceramics coating, CrN or TiN ceramics coating having a film thickness of 20 μm is formed on a surface of a basic material of the slide part on the valve element 2 side. Consequently, it is possible to obtain excellent slide resistance and wear resistance and air-tightness by reducing man-hours for manufacture.

29. 发明专利

JPH02182854A VALVE FOR LIGHT WATER REACTOR PIPING 失效
公开(公告)号：JPH02182854A
公开(公告)日：1990-07-17
申请号：JP32189
申请日：1989-01-06
申请人： HITACHI LTD
发明人： CHIBA YOSHITERU , ONAKA NORIYUKI , ODA ATSUSHI , TAKESHIMA KIKUO , KOJIMA YOSHIYUKI , MATSUMOTO TOSHIMI
IPC分类号： G21D1/00 , C22C19/05 , C22C38/00 , C22C38/44 , F16K3/12
摘要： PURPOSE:To provide a valve excellent in resistance to corrosion and wear by forming one surface of a valve box or a valve disk seat with a specified Fe-based alloy and the other surface with a specified Ni-based alloy and combining the seats. CONSTITUTION:One surface of the seat 5 of the valve disk 6 or of the seat 7 of the valve box 4 is formed with a Cr-Ni-Mo-Fe-based Fe alloy, and the other surface with an Ni-Cr-B-Si-C-W-Fe-based Ni alloy. Both seats 5 and 7 are combined to fabricate a valve. The Fe-based alloy preferably contains, by weight, 20-30% Cr, 10-25% Ni, 5-15% Mo, 1-5% W,

30. 发明专利

JPH01251516A OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01251516A
公开(公告)日：1989-10-06
申请号：JP19599288
申请日：1988-08-08
申请人： HITACHI LTD
发明人： OKADA MICHIYA , MORIMOTO TADAOKI , OKAYAMA AKIRA , YANAI YOSHIMI , SATO HIROSHI , MATSUMOTO TOSHIMI , CHIBA YOSHITERU , AKAHORI KIMIHIKO , KATO TAKAHIKO , DOI TOSHIYA , TANAKA KAZUHIDE
IPC分类号： H01B12/06 , H01B12/04 , H01B13/00
摘要： PURPOSE:To improve the oxidation resistance of a matrix metal and enable the stable production of a wire material by forming the metal phase of the wire material of an alloy containing aluminium. CONSTITUTION:A metal phase 2 consisting of one layer or several layers surrounding an oxide superconductor phase 1 contains a metal having the affinity with oxygen higher than that of the base metal, and forms a fine oxide film at the sintering temperature. Namely, as the metal phase of the superconductor, an alloy containing aluminium based on copper, iron and nickel which has a melting point of the resintering temperature or more is used. As the metals forming the fine oxide film, Al, Si, Ti, Cr, Y and Zr have the affinity with oxide higher than that of the metal as the base metal, and the fine oxide film is formed by the oxidation. By containing plural kinds of these elements, a finer film having high oxidation resistance is formed, preventing the dispersion of oxygen from the oxide superconductor phase 1 to the metal phase 2.

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