专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH09279374A SURFACE PRETREATMENT OF CUTLERY TOOL 失效
公开(公告)号：JPH09279374A
公开(公告)日：1997-10-28
申请号：JP8917996
申请日：1996-04-11
申请人： NIPPON STEEL CORP
发明人： TAKEDA KOICHI , TAMURA MOTONORI , NAKAMORI TAKASHI , NAKAKIMURA HIDENOBU , SUZUKI TSUNESHI
IPC分类号： C23G5/00 , C23F4/00
摘要： PROBLEM TO BE SOLVED: To execute a cleaning treatment of the surface of a cutlery tool member without deteriorating the characteristics of a blade part by mechanically grinding the flat surface part of the blade part and the tool and subjecting the surface part to a vacuum arc descaling. SOLUTION: The plane surface part of the cutlery tool 1 is mechanically ground by a grinder, etc. Cup-shaped vacuum vessels 7, 7' are mounted at the part desired to be descaled of the cutlery tool 1 and only the local part is evacuated. A vacuum arc is generated between the cutlery tool 1 as cathode and an anode electrode 5. Cathode points gather automatically to the oxide scale surface left by the mechanical grinding. The cathode points selectively attack and remove oxide scale. The cathode points are not formed on the mechanically ground surface before the scale removal is completed and, therefore, the blade part is not thermally affected by the cathode point effect. The holding voltage of the arc attains a high value and the completion of the scale removal is detected when the cathode points are formed on the material surface.

2. 发明专利

JPH08215711A MANUFACTURE OF STAINLESS STEEL SHEET 失效
公开(公告)号：JPH08215711A
公开(公告)日：1996-08-27
申请号：JP2850995
申请日：1995-02-16
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI JUN , TAKEDA KOICHI
IPC分类号： B21B3/02 , B21B45/06
摘要： PURPOSE: To reduce the removing cost of an oxidized film by applying vacuum- arc descaling method to remove the oxidized film on a stainless steel sheet after cold rolling and annealing treatment and treating in a short time at voltage and Coulomb density on a level with electrolytic pickling. CONSTITUTION: For example, the stainless steel sheet 1 having the oxidized film of 30-300nm thick is fed into a vacuum-treating chamber which is kept at about 10Pa from an uncoiler 8, connected to the negative pole of a high-frequency arc power supply 5 through conductor rolls 11 and ignited. In this way, an arc current is made to flow from anodes 2 to the stainless steel sheet 1 and, by evaporation of cathod points which are formed on the surface of the stainless steel sheet 1, the oxidized film is removed. Usually, the arc voltage is taken as about 30V, the Coulomb density as about 8000e/m when the thickness of the oxidized film is 100nm. After removing the oxidized film, the sheet is slightly reduced by skin-pass and, further, it is preferable to coil the sheet with a coiler 10, as necessary, after executing passivating treatment.

3. 发明专利

JPH06295644A VACUUM ARC TREATMENT METHOD AND PRE-TREATMENT METHOD 失效
公开(公告)号：JPH06295644A
公开(公告)日：1994-10-21
申请号：JP8221693
申请日：1993-04-08
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI JUN , TAKEDA KOICHI
IPC分类号： H01H33/02
摘要： PURPOSE:To control the thickness of a surface reformed layer by feeding oxygen gas at the time of treating an alloy by a vacuum arc. CONSTITUTION:A material 1 to be treated is connected to a negative electrode of a power source 5 and an anode 2 is connected to a positive electrode. An ignition electrode 3 is connected to a high frequency/high voltage power source 7 through a high frequency/high voltage lead 6 and the other side output of the power source 7 is fed to a cathode. Oxygen gas is fed into a vacuum container 4 from an oxygen cylinder 10 through a flow meter 9 and a nozzle 8. Pressure when the oxygen is not fed is adapted as back pressure, and oxygen partial pressure is found by subtracting the back pressure from the pressure inside the container 4. Thickness of a surface reformed layer can be controlled based on the oxygen partial pressure, vacuum arc treating time and scale thickness before the treatment. The thicker the scale before the treatment is, the higher the oxygen partial pressure is, and the longer the treatment time is, the thicker the thickness of the surface reformed layer becomes.

4. 发明专利

JPH06256982A VACUUM ARC DESCALING METHOD BY SUPERPOSITION OF AC 失效
公开(公告)号：JPH06256982A
公开(公告)日：1994-09-13
申请号：JP4291093
申请日：1993-03-03
申请人： NIPPON STEEL CORP
发明人： TAKEDA KOICHI , TAKEUCHI JUN
IPC分类号： C23F4/02 , C23G5/00
摘要： PURPOSE:To stabilize a cathode point and to improve the surface characteristics of descaled surfaces in vacuum arc descaling. CONSTITUTION:A pulsation arc current of positive polarity superposed with an AC on a DC is passed between an anode 4a-4c connected to the positive electrode of a vacuum arc power source and a continuously moving metallic sheet 1 (cathode) to be descaled. An AC frequency is made higher as this current is higher in correspondence to the moving speed of the metallic sheet 1 (cathode).

5. 发明专利

JPH0517841A ALLOY HAVING CORROSION RESISTANCE IN COMBUSTION ENVIRONMENT IN WHICH V, NA, S AND CL ARE PRESENT AND MULTIPLE LAYERED STEEL TUBE 失效
公开(公告)号：JPH0517841A
公开(公告)日：1993-01-26
申请号：JP33890291
申请日：1991-12-20
申请人： NIPPON STEEL CORP
发明人： OGAWA HIROYUKI , ISHIZUKA TETSUO , DENPO KOZO , MIYASAKA AKIHIRO , TAKEDA KOICHI , ARAKI SATOSHI
IPC分类号： B32B15/01 , C22C19/07 , C22C30/00
摘要： PURPOSE:To provide an alloy having high corrosion resistance and an alloy having steam oxidation resistance in a high temp. combustion environment in which V2O5, Na2SO4, NaCl, etc., are present and a multiple layered steel tube constituted of the relevant alloy. CONSTITUTION:The alloy consisting of, by weight, 40 to 60% Co, 5 to 15% Fe, 0.5 to 5% W, 0.0003 to 0.005% Ca and the balance Ni with 4% lower limit with inevitable impurities and satisfying >=30(%) Cr(%)+0.5Ni(%)+3Mo(%) and having corrosion resistance in a combustion environment in which V, Na, S and Cl are present is prepd.

6. 发明专利

JPH0318979B2 失效
公开(公告)号：JPH0318979B2
公开(公告)日：1991-03-13
申请号：JP7646683
申请日：1983-04-30
申请人： NIPPON STEEL CORP
发明人： TAKEDA KOICHI
IPC分类号： B22D11/10 , B22D41/60

7. 发明专利

JPH02236265A FORMATION OF EROSION RESISTANT COATING LAYER OF TURBINE VANE 失效
公开(公告)号：JPH02236265A
公开(公告)日：1990-09-19
申请号：JP5487589
申请日：1989-03-09
申请人： NIPPON STEEL CORP , CHUBU ELECTRIC POWER
发明人： ITO MICHITOSHI , TAKEDA KOICHI , SUDO KATSUJI , SAWA SHIZUO , KAZAMA KOICHI
IPC分类号： F01D5/28 , C23C4/06
摘要： PURPOSE:To form a coating layer having excellent erosion resistance on steam turbine vanes by holding the turbine vanes at a specific temp. and subjecting the surface thereof to plasma thermal spraying of alloy powder having a specific compsn. under a reduced pressure, thereby forming the thermally sprayed coating layer of specific porosity. CONSTITUTION:While the temp. of the vanes of a steam turbine is held at 300 to 800 deg.C, the thermally sprayed coating layer of

8. 发明专利

JPH02199021A PRODUCTION OF FINE GRANULES OF SUPERCONDUCTING MATERIAL 失效
公开(公告)号：JPH02199021A
公开(公告)日：1990-08-07
申请号：JP1633489
申请日：1989-01-27
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI JUN , ITO MICHITOSHI , TAKEDA KOICHI
IPC分类号： C01G3/00 , C01G1/00 , H01B12/00 , H01B13/00 , H01L39/24
摘要： PURPOSE:To obtain the title Y-Ba-Cu-O-based fine granules of uniform composition through the plasma evaporation process by each specifying the composition of evaporation raw material powder and the molar ratio of the Cu plus Ba to the O2, Ar, Y, Ba and Cu to be fed into a plasma reactor. CONSTITUTION:An evaporation raw material powder consisting of raw powder having a composition of YBa2Cu3O7-x or mixed powder of Y, Ba and Cu at the molar ratio 1:2:3 is fed into a plasma reactor in such a manner as to be 2.1-5mol% of the Cu plus Ba in the total of the oxygen, argon, Y, Ba and Cu to be fed per unit time into the reactor, thus obtaining the objective fine granules of Y-Ba-Cu-O-based superconducting material through the plasma evaporation process. The fine granules are calcined and sintered to produce a sintered compact with high critical current density.

9. 发明专利

JPS63221842A MANUFACTURING METHOD OF METALLIC POWDER, METALLIC COMPOUND POWDER AND CERAMIC POWDER AND DEVICE THEREOF 失效
公开(公告)号：JPS63221842A
公开(公告)日：1988-09-14
申请号：JP5398587
申请日：1987-03-11
申请人： NIPPON STEEL CORP
发明人： SAIKI GORO , KONDO JIRO , TAKEDA KOICHI , MAKI MUTSUO , OKI TSUTOMU
IPC分类号： B01J12/00 , B01J12/02 , B01J19/08 , B22F9/04 , B22F9/12 , C01B13/14 , C01B17/20 , C01B21/06 , C01B21/064 , C01B21/068 , C01B21/072 , C01B21/076 , C01B31/30 , C01B31/36 , C01B33/02 , C01B33/021 , C01B33/06 , C01B33/18 , C01B35/04 , C04B35/565
摘要： PURPOSE:To manufacture raw materials for high-quality baked fine ceramics by charging metals, metallic compounds or ceramics in a confluent part of a plurality of DC plasma flows in a condition tightly sealed against atmosphere and heating and evaporating them. CONSTITUTION:A DC plasma gun 3 is arranged on a circumference, and a high-frequency plasma is provided beneath in such a manner that the center axis of the circumference may be aligned to the center axis of the high-frequency plasma. A plurality of DC plasma flows 1 are arranged so as to allow them to converge, and raw materials of metals, metallic compounds or ceramics are permitted to pass through the center of the confluence. Subsequently, the raw materials are shielded by a high-viscosity DC plasma flame 1, moving over the center axis to be supplied into the high-frequency plasma 2. In this method, the raw materials are always supplied into the high-frequency plasma 2 efficiently, even if reaction conditions vary slightly. Then these raw materials can be totally recovered in the form of powder with a diameter of 0.05-1.0mum.

10. 发明专利

JPS61129261A Production of continuously cast steel ingot having less surface defect 失效
标题翻译：生产具有较少表面缺陷的连续铸钢
公开(公告)号：JPS61129261A
公开(公告)日：1986-06-17
申请号：JP24968184
申请日：1984-11-28
申请人： Nippon Steel Corp
发明人： TAKEDA KOICHI , NOZAKI HIROSHI , KUWANO KAZUHIRO
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/115 , B22D11/116
CPC分类号： B22D11/115
摘要： PURPOSE:To prevent the waving on the surface of the molten metal in a casting mold and to obtain an ingot having good surface quality by applying a static magnetic field near to the surface of the molten metal in the mold. CONSTITUTION:A static magnetic field generator 4 such as electromagnet or permanent magnet is installed on the outside near the surface of the molten metal in the upper part of the casting mold 1. The movement of the molten metal 3 near the inside wall of the mold 1 is suppressed by the static electric field generated from the generator 4, by which the waving is prevented. The solidified shell is thus uniformly formed in the mold 1 and the inclusion of continuous casting powder arising from the waving is prevented as well. The production of the ingot having the good surface quality is thus made possible.
摘要翻译：目的：为了防止在铸模中挥发熔融金属表面，并通过在模具内的熔融金属表面附近施加静磁场，获得具有良好表面质量的铸块。构成：在铸模1的上部的熔融金属表面附近的外侧，安装有静电磁场发生器4，例如电磁体或永磁体。熔融金属3在模具内壁附近的移动 1被从发生器4产生的静电场抑制，由此防止了波动。因此，固化的壳体在模具1中均匀地形成，并且也防止了由波动产生的连续铸造粉末的包含。因此，具有良好的表面质量的锭的生产成为可能。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式