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1. 发明专利

JP2002030388A HEAT RESISTING STEEL FOR FAST BREEDER 失效
公开(公告)号：JP2002030388A
公开(公告)日：2002-01-31
申请号：JP2000208394
申请日：2000-07-10
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA ENG CO LTD
发明人： DOI HIROYUKI , FUKUI HIROSHI , SHIGA MASAO , HIRAGA MAKOTO , KASHIWAKURA JUN , SAWADA SHUSAKU , SUKEGAWA MASAYUKI , MORITA HIROSHI
IPC分类号： G21C1/02 , C22C38/00 , C22C38/48 , C22C38/54 , G21C5/00 , G21C13/08
摘要： PROBLEM TO BE SOLVED: To provide heat resisting steel for fast breeder which has excellent high-temperature strength and further various excellent characteristics against high-temperature Na. SOLUTION: The heat resisting steel for fast breeder contains, by weight, 0.05-0.20% C,

2. 发明专利

JP2001026837A HEAT RESISTANT STEEL 失效
公开(公告)号：JP2001026837A
公开(公告)日：2001-01-30
申请号：JP2000181358
申请日：2000-06-16
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , MAENO YOSHIMI , TAKAHASHI SHINTARO , KURIYAMA MITSUO , SUWA MASATERU , KANEKO RYOICHI , TAN TOSHIMI , ONODA TAKESHI , WATANABE YASUO , KAJIWARA HIDEFUMI , HIRAGA MAKOTO
IPC分类号： C21D9/38 , C22C38/00 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54 , F01D5/02 , F01D5/06 , F01D5/14 , F01D5/28
摘要： PROBLEM TO BE SOLVED: To provide a heat resistant steel having strength at high temperature >=350 deg.C and low heat embrittlement. SOLUTION: This steel has a composition containing, by weight, 0.15 to 0.4% C,

3. 发明专利

JPH11286741A HEAT RESISTANT STEEL, HIGH-AND LOW-PRESSURE INTEGRATED TYPE STEAM TURBINE, AND COMBINED ELECTRIC POWER PLANT 失效
公开(公告)号：JPH11286741A
公开(公告)日：1999-10-19
申请号：JP8841598
申请日：1998-04-01
申请人： HITACHI LTD
发明人： FUKUI HIROSHI , HIDAKA KISHIO , FUJITA TOSHIO , HIRAGA MAKOTO , ONODA TAKESHI , NAKAMURA SHIGEYOSHI , ARAI MASAHIKO
IPC分类号： F01D5/28 , C22C38/00 , C22C38/46 , C22C38/50 , C22C38/54 , F01D25/00 , F01K7/22 , F01K23/10 , F02C6/18
摘要： PROBLEM TO BE SOLVED: To provide a heat resistant steel having high strength at a high temperature and toughness at a low temperature and also to provide a high- and low-pressure integrated type steam turbine using the same, and a high-efficiency combined electric power plant. SOLUTION: These are constituted of a heat resistant steel having a composition containing 0.15-0.4% C, 1-3.5%, W, 0.1-0.35% V, and 0.0015-0.06% N. A high- and low- pressure integrated type steam turbine using the same, and a combined electric power plant.

4. 发明专利

JPH1162503A HIGH/LOW PRESSURE INTEGRAL TYPE STEAM TURBINE AND COMBINED POWER GENERATION SYSTEM 失效
公开(公告)号：JPH1162503A
公开(公告)日：1999-03-05
申请号：JP21290997
申请日：1997-08-07
申请人： HITACHI LTD
发明人： NAKAMURA SHIGEYOSHI , FUKUI HIROSHI , HIRAGA MAKOTO , ONODA TAKESHI , SHIGA MASAO
IPC分类号： F01D1/04 , C22C38/00 , C22C38/48 , F01D5/14 , F01D5/28 , F01D25/00 , F01K7/18
摘要： PROBLEM TO BE SOLVED: To provide a moving blade using a high-strength martensite steel, a high/low pressure integral type steam turbine and a highly effective combined power generation system which use the moving blade. SOLUTION: A high/low pressure integral type steam turbine is provided with a high-pressure part and a low-pressure part, consists of one casing, and has the ratio of the distance between bearings to the length of the blade part of a final moving blade of 5.6-7.0 or the ratio of the output to a rated output (MW) of 20-90. The moving blade contains 0.10-0.24% of C, 0.25%, or less of Si, 0.90% or less of Mn, 8.0-13.0% of Cr, 2.0-4.0% of Ni, greater than 1.5% and 3.0% or less of Mo, 0.04-0.24% of at least one or the sum of Nb and Ta, and 0.02-0.10% of N.

5. 发明专利

JPH117609A THIN FILM MAGNETIC HEAD, AND RECORDING AND REPRODUCING SEPARATION TYPE HEAD, AND MAGNETIC STORING AND REPRODUCING DEVICE USING IT 失效
公开(公告)号：JPH117609A
公开(公告)日：1999-01-12
申请号：JP10898298
申请日：1998-04-20
申请人： HITACHI LTD
发明人： KOMURO MATAHIRO , OKADA TOSHIHIRO , FUYAMA MORIAKI , ITO TETSUO , FUKUI HIROSHI , MARUYAMA YOJI , HIRAGA MAKOTO
IPC分类号： G11B5/31 , G11B5/265 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a thin film magnetic head with little blotting in writing and a high recording magnetic field by forming an upper end part magnetic film on an upper magnetic film and a lower end part magnetic film on a lower magnetic film on end parts forming a magnetic gap. SOLUTION: This magnetic head is provided with an upper magnetic film 11 and a lower magnetic film 15 via non-magnetic magnetic gap film 17, and the upper magnetic film 11 forms an upper end part magnetic film 16 on the end part forming a magnetic gap film 17 on a magnetic gap side. A magnetic pole end part of the recording head of the thin film magnetic head is made by frame plating namely, the three kinds of films of the upper end part magnetic film 16, the gap film 17, and the lower end part magnetic film 18 are plated by using a same frame. Manufacture of a magnetic head of such a structure does not use a frame of silicon dioxide, etc., that eliminates the need for a device forming abrasion-proofness and frame material. Moreover, since the upper magnetic film 11 does not appear on a floating surface, there is little leakage flux from the upper magnetic film onto the floating surface and this permits to reduce blotting in writing on a medium.

6. 发明专利

JPH10183294A STEAM TURBINE ROTOR SHAFT AND HEAT RESISTANT STEEL 失效
公开(公告)号：JPH10183294A
公开(公告)日：1998-07-14
申请号：JP2294898
申请日：1998-02-04
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , MAENO YOSHIMI , TAKAHASHI SHINTARO , KURIYAMA MITSUO , SUWA MASATERU , KANEKO RYOICHI , TAN TOSHIMI , ONODA TAKESHI , WATANABE YASUO , KAJIWARA HIDEFUMI , HIRAGA MAKOTO
IPC分类号： F01D5/28 , C22C38/00 , C22C38/46 , C22C38/48
摘要： PROBLEM TO BE SOLVED: To provide a high- and low-pressure integrated type steam turbine rotor shaft 5 increased in high temp. strength, minimal in heating embrittlement, and capable of plating a >=30-in. moving blade at least at the finial step, its production, and a heat resistant steel. SOLUTION: The high- and low-pressure integrated type steam turbine shaft and the heat resistant steel are composed of an Ni-Cr-Mo-V low alloy steel having a composition which contains, by weight, 0.15-0.4% C,

7. 发明专利

JPH0890016A ROLLING MILL 失效
公开(公告)号：JPH0890016A
公开(公告)日：1996-04-09
申请号：JP22475594
申请日：1994-09-20
申请人： HITACHI LTD
发明人： OKOCHI NORIHIKO , KAWAHIGASHI TAMITO , HIRAGA MAKOTO
IPC分类号： B21B27/00 , B21B13/02 , B21B27/02
摘要： PURPOSE: To improve working precision in out-of-roundness, cylindricity, etc., and to obtain a high-precision ceramic roll by blocking movement in the axial direction of a work roll made of a ceramic roll by means of a supporting bearing which is rotated synchronously with a roller or roll and which is provided in contact with its end face. CONSTITUTION: A pair of intermediate rolls 3 and a pair of reinforcing rolls 4 consisting of a shaft and barrel are pressed against a work roll 1 composed of sialon; and the work roll 1 is rotated trailingly by the rotary driving of the intermediate rolls 3. The shaft of the intermediate rolls 3 is rotatably driven by a motor through a universal joint and a reduction gear. Additionally, the shaft of the intermediate rolls 3 transmits a rolling reaction force to a bearing provided in the shaft. On each end face of the work roll 1, the movement in the axial direction of the work roll 1 is supported by the supporting bearing 9 and the supporting part 8 of the work roll so as to be rotated synchronously with the rotation of the ceramic roll. As a result, the movement is restrained in the axial direction of the work roll.

8. 发明专利

JPH0563544B2 失效
公开(公告)号：JPH0563544B2
公开(公告)日：1993-09-10
申请号：JP163087
申请日：1987-01-09
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , KURYAMA MITSUO , IIJIMA KATSUKI , MAENO YOSHIMI , TAKAHASHI SHINTARO , IIZUKA NOBUYUKI , KUROSAWA SOICHI , WATANABE YASUO , HIRAGA MAKOTO
IPC分类号： C22C38/00 , C22C19/05 , C22C19/07 , C22C38/46 , C22C38/48 , C22C38/54 , F01D5/00 , F01D5/06 , F01D5/28
摘要： This new heat-resistant steel has the following component compsn. (1) C (0.05-0.2 wt.%), Si (0.5 wt.% or less), Mn (0.6 wt.% or less), Cr (8-13 wt.%, Mo (1.5-3 wt.%), Ni (2-3 wt.%), V (0.05-0.3 wt.%), Nb and/or Ta (total amount : 0.02-2.0 wt.%), N (0.02-0.1 wt.%), Fe (the remaining wt.%), Mn/Ni is not more than 0.11 (2) C (0.07-0.15 wt.%), Si (0.01 or 0.1 wt.%), Mn (0.1-0.4 wt.%), Cr (11-12.5 wt.%), Ni (2.2-3.0 wt.%), Mo (1.8-2.5 wt.%), Nb and/or Ta (total amount:0.04 - 0.08 wt.%), Fe (the remaining wt.%), Mn/Ni = 0.04-0.10 (3) C (0.05-0.2 wt.%), Si (0.5 wt.% or less), Mn (0.6 wt.% or less), Cr (8-13 wt.%), Mo (1.5-3 wt.%), Ni (2-3 wt.%), V (0.05-0.3 wt.%), Nb and/or Ta (total amount : 0.02-0.2 wt.%), N (0.02-0.1 wt.%), W (1 wt.% or less), Co (0.5 wt.% or less), Cu (0.5 wt.% or less), B (0.01 wt.% or less), Ti (0.5 wt.% or less), Al (0.3 wt.% or less). Zr (0.1 wt.% or less), Hf (0.1 wt.% or less), Ca (0.01 wt.% or less), Mg (0.01 wt.% or less), Y (0.01 wt.% or less), rare earth elements (0.01 wt.% or less), Fe (the remaining wt.%). (1) has characteristics such as creep rupture strength of at least 50 kg/mm2 at 450 deg. C for 105 hours and a 25 V-notch Charpy impact value of at least 5 Kg/m/cm2 after heat treatment at 500 deg. C for 103 hours. Compsn. (2) has the annealed martensite structure. This heat-resistant steel is used for the turbine discs of a gas turbine which consists of a turbine shaft, a number of turbine discs, a number of compression discs connected to the distant pieces by compressor stacking bolts, compressor blades implated in the compressor discs and a compressor stub shaft shaped integrally at the initial stage of the compressor disc.

9. 发明专利

JPH0258364A CIRCUIT BOARD AND ELECTRONIC DEVICE USING IT AND ITS MANUFACTURE 失效
公开(公告)号：JPH0258364A
公开(公告)日：1990-02-27
申请号：JP20839388
申请日：1988-08-24
申请人： HITACHI LTD
发明人： KURIHARA YASUTOSHI , TAKAHASHI SHIGERU , TAKAHASHI MASAAKI , YAMADA KAZUJI , ENDO TSUNEO , KANAI KIYOSHI , HIRAGA MAKOTO
IPC分类号： H05K1/02 , H01L21/52 , H01L23/12 , H01L27/01 , H05K1/03 , H05K1/14
摘要： PURPOSE:To form a circuit board having a metallized region for mounting a power element excellent in matching with film manufacturing process by providing a semiconductor substance layer consisting of semiconductor substance whose impurity concentration is specific or whose electric resistivity at room temperature is specific, at the specified part of a ceramic electric insulating board. CONSTITUTION:At one face on a sintered body board 100 which was obtained by sintering high purity aluminum nitride powder to which a very small amount of Y2O2 powder is added at 1700 deg.C under atmospheric pressure, a silicon layer 11 about 5mum thick, and at the other face a silicon layer 12 about 5mum thick are overland, respectively. And the silicon layers 11 and 12 are doped (concentration 10 /cm , resistivity 2X10 OMEGA.cm) with impurity such as phosphorus, etc. Next, the silicon layer 11 is patterned in the regions of the silicon layers 102 and 112. And silicon layers 102 and 112, and 122(12) are provided with metallic layers 101 and 111 consisting of silver-palladium, and the layer 121 is provided with a thick film paste (Ag-10wt.%Pt) by printing and baking.

10. 发明专利

JPS63215057A SEMICONDUCTOR DEVICE AND ITS MANUFACTURE 失效
公开(公告)号：JPS63215057A
公开(公告)日：1988-09-07
申请号：JP4756687
申请日：1987-03-04
申请人： HITACHI LTD
发明人： SUZUKI HIDEO , NAKAGAWA MOROO , OHASHI MASABUMI , SUZUKI HIROYUKI , HIRAGA MAKOTO
IPC分类号： H01L23/10
摘要： PURPOSE:To prevent the deterioration of characteristics due to thermal fatigue after sealing, by restricting the void content and the maximum grain diameter of void of a glass layer for sealing a semiconductor device, within a range less than a specified value. CONSTITUTION:A semiconductor element 7 is joined on one side surface of an insulating substrate 3, and on the peripheral part of the surface, a frame 11 is sealed via a glass layer 4 with low melting point. A plurality of lead- segments 5 are airtightly sealed in the glass layer 4, and the one end of the lead-segment is connected to the semiconductor element 7 by a bonding wire 9. The other surface of the frame 11 and a cap 6 are airtightly sealed by a glass layer 10 with low melting point. The glass layers 4 and 10 are formed in the manner in which the void content is less than or equal to 7vol.% and the maximum grain diameter is less than or equal to 0.11mm. By reducing the void in the glass layer and restricting the grain diameter, the deterioration of characteristics due to thermal fatigue after sealing can be prevented.

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