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21. 发明专利

JPH01156450A LOW THERMAL EXPANSION CAST IRON EXCELLENT IN WEAR RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPH01156450A
公开(公告)日：1989-06-20
申请号：JP31588887
申请日：1987-12-14
申请人： HITACHI LTD
发明人： KONDO YASUO , ERA MASAYUKI , MORIMOTO SHOGO , MORIKAWA MINORU
IPC分类号： C21D5/00 , C21D1/09 , C22C33/08 , C22C37/00
摘要： PURPOSE:To form graphite in cast iron into cementite and to improve wear resistance while holding workability and castability by subjecting a low thermal expansion cast iron composed principally of Fe and Ni or of Fe, Ni, and Co to heat treatment under specific conditions. CONSTITUTION:The surface layer, at least, of a casting composed of a low thermal expansion alloy cast iron containing Ni or Ni and Co is remelted by the use of a TIG welder, etc., and then solidified by rapid cooling, or, this casting composed of the low expansion alloy cast iron is heated in an inert-gas atmosphere of Ar, etc., up to a temp. within a range between the initial temp. of eutectic and the finishing temp. of eutectic of the cast iron, held at the above temp. for about 2hr, and then subjected to quenching treatment such as oil quenching. By this method, graphite in the cast iron is partly precipitated in the form of hard cementite and a structure in which cementite is uniformly dispersed in an Fe-Ni or Fe-Ni-Co matrix is formed, by which a low thermal expansion alloy cast iron excellent in wear resistance can be manufactured.

22. 发明专利

JPS6450319A MANUFACTURE OF OXIDE SUPERCONDUCTIVE WIRE 失效
公开(公告)号：JPS6450319A
公开(公告)日：1989-02-27
申请号：JP20634987
申请日：1987-08-21
申请人： HITACHI LTD
发明人： UCHIDA TETSUO , YOSHINARI AKIRA , MORIMOTO SHOGO
IPC分类号： H01B12/06 , B28B1/00 , H01B13/00
摘要： PURPOSE:To reduce difficulty because of fragility when a long size material is made, and the dispersion of a superconductive characteristic by melting an oxide system superconductive material in an oxygen enrichment, making the melt to uniformly adhere to the peripheral surface of a ceramics fiber wire, and heat treating the melt in an oxygen atmosphere as required. CONSTITUTION:The raw material of an oxide superconductor is melted with oxygen blowing, then is made to adhere to the peripheral surface of a ceramics fiber. For instance, each oxide of Y2O3, BaO, and CuO is weighed so as to have the ratio of Y:Ba:Cu=1:2:3 in the mole ratio, and melted and maintained at 1550 deg.C in a melting furnace 3 with a cover 8 to which an oxygen blowing nozzle 4 is buriedly provided. An oxygen at that time has a pressure of 1.0kg/cm and a flow rate of 5l/min., stirring and an oxygen enrichment of the melt mentioned above are fully conducted, then a ceramics fiber 1 having a diameter of 50mum phi and material of ZrO2 is inserted and pulled up, and a wire material, having an outer diameter of 0.2mm in which an oxide superconductive raw material is adhering to the circumference of the ceramics fiber is made. The wire material is completely manufactured with its heat treatment made at 850-950 deg.C in a heat treatment furnace 5 in an oxygen atmosphere.

23. 发明专利

JPS6450317A MANUFACTURE OF OXIDE SUPERCONDUCTOR WIRE 失效
公开(公告)号：JPS6450317A
公开(公告)日：1989-02-27
申请号：JP20634687
申请日：1987-08-21
申请人： HITACHI LTD
发明人： UCHIDA TETSUO , YOSHINARI AKIRA , MORIMOTO SHOGO
IPC分类号： B28B1/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To improve a current density with the ununiformity of a locational superconductive characteristic of a wire material eliminated by melting an oxide system superconductive material in an oxygen enrichment, making a quenching wire material directly, and heat treating the material in an oxygen atmosphere. CONSTITUTION:The material of an oxide superconductor is weighed so that, for instance, each oxide of Y2O3, BaO, and CuO is made to have a ratio of Y:Ba:Cu=1:2:3 in the mole ratio, and is melted and maintained at 1550 deg.C in a melting furnace 1 having an oxygen supply brick 2, pressurizing cover 5, and nozzle 3. During the material is melted and maintained, a pressurizing valve 6 and the nozzle 3 are closed, an oxygen supply valve 7 is opened, the oxygen in an oxygen source 8 is blown in a melt 4 from the brick 2, and a melt stirring and an oxygen enrichment are fully conducted. Then the valve 6 and the nozzle 3 are opened, the melt is injected, a wire material having the diameter of 50mum is made via a water tank 9, and the wire material is treated in a heat treatment furnace in a heat treatment furnace in an oxygen atmosphere at 850-950 deg.C to be completed.

24. 发明专利

JPS63272986A COMPOSITE SCREW ROTOR FOR COMPRESSOR 失效
公开(公告)号：JPS63272986A
公开(公告)日：1988-11-10
申请号：JP10602387
申请日：1987-04-28
申请人： HITACHI LTD
发明人： KONDO YASUO , MORIMOTO SHOGO , SAKAI TAKAAKI
IPC分类号： F04C29/00 , C22C38/00 , F01C1/08 , F04C18/16
摘要： PURPOSE:To prevent tooth form and shaft portions respectively from high temperature cracks and corrosion by forming the tooth form portion and shaft portion respectively of low thermal expansion high Ni cast iron having a specified value or less of average coefficient of thermal expansion within a specified temperature range and stainless alloy excellent in corrosion resistance. CONSTITUTION:A screw rotor is constituted from a plurality of rotors 1, 2 having male and female screws meshing with each other, and the respective rotors 1, 2 are formed of tooth form portions 3, shaft portions 4 and connections 5 thereof. Then, the composition of tooth form portion 3 is set to 0.5-1.2wt.% of C, 0.3 or less wt.% of Si, 0.5-2.0wt.% of Mn, 36-42wt.% of Ni, residue of Fe, etc. Also, is used low thermal expansion high Ni cast iron having 20-250 deg.C of average coefficient of thermal expansion and 6X10 / deg.C or less of low thermal expansion. On the other hand, for the shaft portion 4 is used stainless alloy steel having the composition of 0.25wt.% or less of C, 10-30wt.% of Cr, 6-15wt.% of Ni, residue of Fe, etc., and excellent in corrosion resistance.

25. 发明专利

JPS62116737A Manufacture of long-size aluminum-carbon fiber-reinforced composite material 失效
标题翻译：长尺寸铝碳纤维增强复合材料的制造
公开(公告)号：JPS62116737A
公开(公告)日：1987-05-28
申请号：JP25477485
申请日：1985-11-15
申请人： Hitachi Ltd
发明人： ARAKAWA HIDEO , MORIMOTO SHOGO , NUMATA YOSHIMICHI
IPC分类号： C22C47/20 , C22C21/00 , C22C47/00
摘要： PURPOSE: To manufacture a long-size aluminum-carbon fiber-reinforced composite material free from uncompounding and carbide evolution by controlling the conditions under which carbon fiber and aluminum are compounded.
CONSTITUTION: The carbon fiber 1 is coated with Al by an ion plating method to undergo formation of an Al coating layer 2 to prepare an Al-coated carbon fiber. Then, plural pieces of said fibers are bundled, and the resulting bundle is put between rotating rolls, to which a fixed load is applied, at least twice or more, so that long-size Al-carbon fiber-reinforced composite material in which the carbon fibers 1 are dispersed in the Al matrix 2 uniformly as well as continuously in one direction can be manufactured.
COPYRIGHT: (C)1987,JPO&Japio
摘要翻译：目的：通过控制复合碳纤维和铝的条件，制造长度不大的碳化硅纤维增强复合材料。构成：通过离子镀法将碳纤维1涂覆有Al，以形成Al涂层2以制备Al涂覆的碳纤维。然后，将多根所述纤维捆扎，将得到的束放在施加了固定载荷的旋转辊之间至少两次以上，使得长尺寸的碳纤维增强复合材料碳纤维1均匀地分散在Al基体2中，并且可以在一个方向上连续地分散。

26. 发明专利

JPS61257439A MANUFACTURE OF METALLIC MATRIX-FIBER COMPOSITE MATERIAL 失效
公开(公告)号：JPS61257439A
公开(公告)日：1986-11-14
申请号：JP9779485
申请日：1985-05-10
申请人： HITACHI LTD
发明人： NUMATA YOSHIMICHI , ARAKAWA HIDEO , MORIMOTO SHOGO , SASAKI TOSHIMI
IPC分类号： C22C47/16 , C22C47/00
摘要： PURPOSE:To manufacture a composite material having good adhesion between metallic matrix and fiber by subjecting plural fibers coated with a metal to be a matrix to pressure forming by heating and then to cooling with pressurizing by use of rolls for cooling. CONSTITUTION:The plural fibers 1 coated with the metal to be a matrix is subjected to continuous pressure forming by use of rolls 3 for forming heated to a compounding temp. Succeedingly, a formed body 5 discharged from the rolls 3 for forming is cooled to the compounding temp. or below while being pressurized by use of rolls 4 for cooling. Further, C, SiC, Al2O3 or W fiber is used as the fiber and copper is used as the matrix metal. In this way, products having sound composite structure can be obtained without causing exfoliation between the matrix and fiber as well as cracking in the matrix.

27. 发明专利

JPH0680176B2 失效
公开(公告)号：JPH0680176B2
公开(公告)日：1994-10-12
申请号：JP28656687
申请日：1987-11-13
申请人： HITACHI LTD
发明人： ERA MASAYUKI , KONDO YASUO , MORIMOTO SHOGO , SHIMOTAMURA OSAMU
IPC分类号： B21B27/00 , B22D23/10 , B22D27/02 , C21D9/38 , C22C37/00 , C22C37/08

28. 发明专利

JPH01293955A MOLD FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH01293955A
公开(公告)日：1989-11-27
申请号：JP12333688
申请日：1988-05-20
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： YASUDA TAKESHI , KODAMA HIDEYO , MORIMOTO SHOGO , OKAYAMA AKIRA , KOBAYASHI MITSURU , MORIWAKI SABURO , HIRANO SATOSHI , KIMURA TOMOAKI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of solidified shell on a short side mold by arranging projection having shape along a long side mold at the short side mold position near the part brought the short side mold into contact with the long side mold. CONSTITUTION:In the continuous casting mold, the projection 4 having the shape along the long side mold 5 at the short side mold position near the part brought the short side mold 1 into contact with the long side mold 5 is arranged. This projection 4 is projected in high temp. molten metal 12 having at least the solidified temp. or higher of the molten metal 12 and three directions around the projection is surrounded with this high temp. molten metal 12. Further, the volume of the projection 4 is far small as compared with the molten metal 12 around the projection 4. Therefore, at the time of pouring the molten metal 12 around the projection 4, the projection instantly comes to the same temp. as the molten metal 12 and hot spot having the same temp. as the molten metal 12 is formed on the short side mold 1. As the temp. of this projection 4 raises, it has effect, which cooling from the long side mold 5 as cooling body is reduced. In this result, the development of the solidified shell on the surface part of the short side mold 1 is surely prevented.

29. 发明专利

JPH01289562A UNIDIRECTIONAL SOLIDIFIED INGOT AND ITS MANUFACTURE AND APPLICATION 失效
公开(公告)号：JPH01289562A
公开(公告)日：1989-11-21
申请号：JP11812688
申请日：1988-05-17
申请人： HITACHI LTD
发明人： YOSHINARI AKIRA , FUJII NORIHISA , MORIMOTO SHOGO , KODAMA HIDEYO , ERA MASAYUKI , OMORI YOSHIBUMI
IPC分类号： B21B1/40 , B21J1/04 , B22D7/06 , B22D27/04 , B22D27/20 , B22D29/00 , C22C1/02 , C23C14/34
摘要： PURPOSE:To improve the yield and quality of a thin film by making the vicinity of the circumferential face of an ingot in an equiaxed crystal or a columnar crystal in the radial direction and forging or rolling this steel ingot in case of executing the uni-directional solidification of the molten metal of the mold inside toward the upper part from the lower part. CONSTITUTION:A small equiaxed crystal or columnar crystal in the radial direction is formed on the side face of the ingot developed to the columnar crystal by adding a Co contg. refining agent into a molten metal, impressing a fluctuating magnetic field on the outer peripheral part of a mold or making the mold inside in rugged shape, etc. Casting or rolling is then executed by constraining this uni-directional solidified ingot directly or by coating with an elongating material. The size of the equiaxed crystal or columnar crystal thus developed is formed in >=5mm, etc., the cracking at working time is prevented and the generation of the re-crystalline nuclei of the working time is facilitated. The yield and quality of the thin film forming part of a sputtering target, etc., are improved because forging and rolling can be done on the ingot.

30. 发明专利

JPS6465244A HIGH CHROMIUM CAST IRON COMPOSITE ROLL 失效
公开(公告)号：JPS6465244A
公开(公告)日：1989-03-10
申请号：JP22017287
申请日：1987-09-04
申请人： HITACHI LTD
发明人： KONDO YASUO , ERA MASAYUKI , MORIMOTO SHOGO , SHIMOTAMURA OSAMU
IPC分类号： C21D9/38 , C22C37/00 , C22C37/06 , C22C38/18
摘要： PURPOSE:To improve the reliability on the junction boundaries, the strength of a shaft and the toughness in the titled composite roll by specifying the C and Cr contents of the core and outer layer material independently and welding and bonding both materials by electro-slag remelting. CONSTITUTION:The compsn. of a roll core is composed of, by weight, 0.3-1.0% C, 0.5-5% Cr and other suitable elements. The compsn. of the outer layer material is composed of high Cr cast iron contg. 1.5-3.5% C, 10-25% Cr and other suitable elements. The core and outer layer material are subjected to electro-slag remelting and are welded and bonded. Said composite roll is subjected to induction heating to 950-1,100 deg.C, is converted into austenite and is subjected to a heat treatment in the process composed of quenching, sub-zero treatment and tempering. By this method, the shaft and net part having high strength and toughness are provided to the titled composite roll and in which the range of about >=90 HS is retained to at least about 40mm depth from the surface of the roll.

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