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2. 发明专利

JPH0636410B2 失效
公开(公告)号：JPH0636410B2
公开(公告)日：1994-05-11
申请号：JP12552883
申请日：1983-07-12
申请人： TOHOKU METAL IND LTD
发明人： YAMANAKA EIJI
IPC分类号： H01L29/80 , H01L21/20 , H01L21/28 , H01L21/322 , H01L29/30 , H01L29/772 , H01L29/804

3. 发明专利

JPS6351991B2 失效
公开(公告)号：JPS6351991B2
公开(公告)日：1988-10-17
申请号：JP14509483
申请日：1983-08-10
申请人： TOHOKU METAL IND LTD
发明人： IDEI KAZUHIKO , PPONDA KEIICHI
IPC分类号： B22F3/02 , B22C1/00 , B22C3/00 , B22F5/12 , C04B35/26 , C22C1/05 , H01F1/08 , H01F1/10 , H01F1/113 , H01F41/02

9. 发明专利

JPS6360264A PRODUCTION OF AMORPHOUS CO ALLOY 失效
公开(公告)号：JPS6360264A
公开(公告)日：1988-03-16
申请号：JP20265886
申请日：1986-08-30
申请人： TOHOKU METAL IND LTD
发明人： YAMADA MORIKAZU
IPC分类号： C22F1/00 , C22C19/07 , C22C45/04 , C22F1/10 , H01F1/153
摘要： PURPOSE:To produce a wound magnetic core having high squareness and small coercive force in a high frequency region and undergoing little change in the magnetic characteristics with the lapse of time by subjecting a thin amorphous Co alloy strip formed by very rapid cooling to strain relief annealing and by heat treating it in a magnetic field under specified conditions. CONSTITUTION:A molten Co alloy having a compsn. represented by formula I is very rapidly cooled by a single roll process to form a thin amorphous alloy strip. In order to relieve residual stress produced by the very raid cooling, the strip is coated with an interlaminar insulating film of MgO, formed into a wound magnetic core and subjected to strain relief annealing, by heating at 200-500 deg.C for about 1hr in an N2 atmosphere and rapid cooling to room temp. at >=5,000 deg.C/min cooling rate. The magnetic core is then heat treated in an AC magnetic field of 50Hz applied in the peripheral direction by heating to 150-250 deg.C which is below the Curie temp. of the core, holding for a certain time and cooling to room temp.

10. 发明专利

JPS6360053A PRODUCTION OF SUPER RAPIDLY COOLED METAL STRIP 失效
公开(公告)号：JPS6360053A
公开(公告)日：1988-03-16
申请号：JP20398786
申请日：1986-08-30
申请人： TOHOKU METAL IND LTD
发明人： TATSUYA YUUICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To easily, continuously and accurately obtain super rapidly cooled metal strip having wide width and thin thickness by injecting molten metal to a cooling roll from a nozzle at the specific injecting angle to a tangent line of the cooling roll. CONSTITUTION:The molten metal is injected to the rotating cooling roll 3 from the nozzle and rapidly solidified, to obtain the super rapidly cooled metal strip. In this case, the molten metal is injected at 80-87 deg. the inclined angle theta1 between a shaft direction of the nozzle slit 1 and roll face at roll top point, to discharge uniformly on the cooling roll 3. In this way, the effect of prevention for scattering the molten metal droplet and the effect of producing the strip to thin thickness are obtd. at the same time.

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