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1. 发明专利

DE69527778T2 未知
公开(公告)号：DE69527778T2
公开(公告)日：2002-12-05
申请号：DE69527778
申请日：1995-09-27
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , KUROSAWA MITSUMASA , KAWANO MASAKI , ISHITOBI HIROTAKE , SAKAGUCHI MASAYUKI , SUZUKI TAKAFUMI , NISHIIKE UJIHIRO
IPC分类号： C21D3/04 , C21D8/12
摘要： A method for producing a grain-oriented silicon steel sheet in the coil shape having high magnetic induction and including AlN and MnSe as principal inhibitors is disclosed. In a series of processes for producing a grain-oriented silicon steel sheet, the oxide content on the steel sheet surface is controlled within a range of about 0.02 to 0.10 g/m before the temperature elevation phase of a decarburization annealing process, and the ratio of the steam partial pressure to the hydrogen partial pressure is controlled within a range of about 0.2 to 0.65 at a steel sheet surface temperature ranging from about 500 to 750 DEG C during the temperature elevation phase in a decarburization annealing process. The method promotes stable secondary recrystallized grain formation even in different coils or at different places in the same coil, such that fluctuation of magnetic properties is depressed.

2. 发明专利

DE69527778D1 未知
公开(公告)号：DE69527778D1
公开(公告)日：2002-09-19
申请号：DE69527778
申请日：1995-09-27
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , KUROSAWA MITSUMASA , KAWANO MASAKI , ISHITOBI HIROTAKE , SAKAGUCHI MASAYUKI , SUZUKI TAKAFUMI , NISHIIKE UJIHIRO
IPC分类号： C21D3/04 , C21D8/12
摘要： A method for producing a grain-oriented silicon steel sheet in the coil shape having high magnetic induction and including AlN and MnSe as principal inhibitors is disclosed. In a series of processes for producing a grain-oriented silicon steel sheet, the oxide content on the steel sheet surface is controlled within a range of about 0.02 to 0.10 g/m before the temperature elevation phase of a decarburization annealing process, and the ratio of the steam partial pressure to the hydrogen partial pressure is controlled within a range of about 0.2 to 0.65 at a steel sheet surface temperature ranging from about 500 to 750 DEG C during the temperature elevation phase in a decarburization annealing process. The method promotes stable secondary recrystallized grain formation even in different coils or at different places in the same coil, such that fluctuation of magnetic properties is depressed.

3. 发明专利

JPH06336612A PRODUCTION OF GRAIN-ORIENTED SILICON STEEL SHEET EXCELLENT IN SURFACE PROPERTY AND MAGNETIC PROPERTY 失效
公开(公告)号：JPH06336612A
公开(公告)日：1994-12-06
申请号：JP12905993
申请日：1993-05-31
申请人： KAWASAKI STEEL CO
发明人： NISHIIKE UJIHIRO , MINATO TAKEHIKO , MANABE MASAHIKO , KOTANI KEISUKE
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/06 , H01F1/16
摘要： PURPOSE:To produce a grain-oriented silicon steel sheet excellent in surface properties and magnetic properties, at the time of subjecting silicon steel sheet stock to hot rolling, cold rolling, decarburizing annealing and final finish annealing by regulating the atmosphere in the case of the decarburizing annealing in the heat treatment under specified conditions after the hot rolling. CONSTITUTION:For forming AlN as an inhibitor, at the time of subjecting the slab of silicon steel contg. 0.01 to 0.06% solAl and 0.0030 to 0.0120% N or furthermore contg. 0.01 to 0.08% Cu to hot rolling into a hot rolled sheet, the starting temp. of finish rolling is regulated to 1000 to 1180 deg.C, and cooling is executed in such a manner that the temp. difference between the surface layer of the steel sheet and the layer at the 1/4 depth of the sheet thickness immediately after one pass of the finish rolling is regulated to >=80 deg.C. Next, cold rolling for one time or cold rolling for >= two times including process annealing is executed to regulate its sheet thickness into a final one. After that, it is subjected to decarburizing annealing in an atmosphere in which the ratio (PH20/PM2) of the steam partial pressure to the hydrogen partial pressure is regulated to 0.4 to 0.7, is finally coated with a separation agent for annealing and is subjected to final finish annealing.

4. 发明专利

JPH09291373A MAGNETIC SHIELDING MATERIAL 失效
公开(公告)号：JPH09291373A
公开(公告)日：1997-11-11
申请号：JP10823796
申请日：1996-04-26
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , KUROSAWA MITSUMASA , FUJIYAMA TOSHIRO
IPC分类号： C23C22/00 , C23C22/74 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To improve the coating film adhesion and formability without lowering the magnetic permeability at the time of forming a resin coating film on a grain-oriented silicon steel sheet magnetic shielding material used in a small- sized motor and having a forsterite coating by controlling the coating weight and friction coefficient. SOLUTION: A coating film having and baked. This coating film consists of one kind selected from epoxy resin paint, acrylic resin paint and polyester resin paint and has 30-150sec viscosity by No.4 Ford cup measurement. Meanwhile, a high-mol.wt. bisphenol A-type epoxy resin is preferably used as the epoxy resin paint. Either the thermoplastic or thermosetting acrylic resin paint can be used, and unsaturated polyester resin, styrene monomer, paraffin, hydroquinone and cobalt octanoate are used as the principal of the polyester resin paint.

5. 发明专利

JPH08157971A PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET CAPABLE OF STABLY PROVIDING EXCELLENT MAGNETIC PROPERTY 失效
公开(公告)号：JPH08157971A
公开(公告)日：1996-06-18
申请号：JP16195595
申请日：1995-06-28
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , NISHIIKE UJIHIRO , KUROSAWA MITSUMASA , KONO MASAKI , ISHITOBI HIROTAKE , SAKAGUCHI MASAYUKI , SUZUKI TAKASHI
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60
摘要： PURPOSE: To industrially, stably, and relatively easily produce a grain oriented silicon steel sheet excellent in magnetic properties. CONSTITUTION: This grain oriented silicon steel sheet is produced by a series of stages using a grain oriented silicon steel stock containing, as inhibitor- forming components, 0.02-0.15%, by weight, Mn, 0.005-0.060% Se, 0.010-0.06% Al, and 0.0030-0.0120% N. At this time, the amount of oxides at the surface of the steel sheet before decarburizing annealing is regulated to (0.02 to 0.10)g/m by oxygen coating weight. Further, at the time of sebsequent decarburizing annealing, the ratio of the partial pressure of water vapor to the partial pressure of hydrogen in an atmosphere is controlled to 0.3-0.5 in the course where the surface temp. of the steel sheet is 500-750 deg.C, and also the ratio of the partial pressure of water vapor to the partial pressure of hydrogen in an atmosphere is controlled to 0.5-0.8 in the course where the surface temp. of the steel sheet is 750-850 deg.C.

6. 发明专利

JP2000024555A METHOD AND APPARATUS FOR ELECTROSTATICALLY APPLYING OIL TO METAL WIRE 失效
公开(公告)号：JP2000024555A
公开(公告)日：2000-01-25
申请号：JP19858698
申请日：1998-07-14
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE
IPC分类号： B05D7/20 , B05B5/14
摘要： PROBLEM TO BE SOLVED: To certainly and uniformly apply oil to the peripheral surface of a metal wire by utilizing static electricity by cyclically changing charge applied to oil mist in charging the oil mist at a time of the application of oil to the peripheral surface of the metal wire by guiding the metal wire through the oil mist. SOLUTION: A nozzle 3 spraying oil is arranged in a treatment tank 2 to supply oil mist 4 to a region where a metal wire 1 passes and a discharge wire 6 is further arranged between the path line of the metal wire 1 and the nozzle 3 and the metal wire 1 is passed through the charged oil mist 4 to be coated with the oil. As an electrode body, a structure formed by providing a plurality of discharge wires 6 between the electrodes 5a and 5b provided to the inside wall of the treatment tank 2 under tension is pref. and voltage is supplied across the electrodes 5a and 5b through a constant voltage device and a pulse generator to cyclically change the charge applied to the oil mist 4. That is, voltage is supplied across the electrodes 5a and 5b in a pulse like state and the charge of the oil mist 4 is cyclically changed.

7. 发明专利

JPH0277526A PRODUCTION OF LOW-IRON-LOSS GRAIN-ORIENTED ELECTRICAL STEEL SHEET 失效
公开(公告)号：JPH0277526A
公开(公告)日：1990-03-16
申请号：JP26941888
申请日：1988-10-27
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , HINA EIJI , SAKAGUCHI MASAYUKI , IWAMOTO KATSUO
IPC分类号： C21D9/46 , C21D8/12
摘要： PURPOSE:To produce the title low-iron-loss grain-oriented electrical steel sheet having a nice-looking coating film by preannealing a cold-rolled sheet under specified condition prior to decarburization annealing to obtain a recovery crystal aggregate texture, and controlling the surface oxidation amt. to a low level. CONSTITUTION:The cold-rolled sheet having final thickness is preannealed prior to decarburization annealing at 600-650 deg.C for 30sec to 10min in the nonoxidizing atmosphere having the dew point of

8. 发明专利

JPH11124685A MAGNETIC SHIELDING MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH11124685A
公开(公告)日：1999-05-11
申请号：JP28851497
申请日：1997-10-21
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , FUJIYAMA TOSHIRO
IPC分类号： C23C22/00 , C23C22/74 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To suppress the peeling of coating film and the reduction of the permeability caused by machining and to make it possible to be used under high temp. and high moisture by forming a specified amt. of intermediate coating film having corrosion-resistance on the surface of forsterite coating film and furthermore forming a specified amt. of coating film in which the coefficient of friction is regulated to specified value or below on the surface of the intermediate coating film. SOLUTION: On the surface of forsterite coating film, intermediate coating film is formed by 5 to 100 mg/m . As for the intermediate coating film, limitation is not particularly placed only if it is enough in corrosion resistance, but, it is preferably made the one contg. at least one metal among Cu, Cr, Ni, Sn and Zn or the compd. thereof, and, particularly, chromate coating contg. a Cr oxide is most suitable. Furthermore, the surface of the intermediate coating film is coated with coating material to form coating film, and, the coefficient of friction (static) in the surface of the coating film is regulated to . As the coating material, resinous coating material of epoxy series, acrylic series or polyester series is suitably used.

9. 发明专利

JPH06330172A PRODUCTION OF GRAIN-ORIENTED SILICON STEEL SHEET HAVING EXCELLENT MAGNETIC CHARACTERISTIC 失效
公开(公告)号：JPH06330172A
公开(公告)日：1994-11-29
申请号：JP11984093
申请日：1993-05-21
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE , IIDA YOSHIAKI
IPC分类号： C21D8/12 , H01F1/16
摘要： PURPOSE:To obtain a grain-oriented silicon steel sheet having forsterite film without defect by applying heat treatment or a prescribed condition in the finish cold-rolling process and forming a thin oxide layer on the steel sheet surface. CONSTITUTION:After hot-rolling the grain-oriented silicon steel base stock containing inhibitor (AlN), cold rolling is executed once or twice including a process annealing. Successively, after executing decarburize-annealing, an annealing separator is applied and the last finish annealing is applied to produce the grain-oriented silicon steel sheet. The heat treatment is applied at 200-400 deg.C in the wet atmosphere before or during the last cold-rolling in this process. Then, preceding to the decarburize-annealing, an extremely thin oxide layer is formed on the steel sheet surface to obtain the forsterite film without defect.

10. 发明专利

JPH03243795A PRODUCTION OF SILICON STEEL SHEET HAVING FINE APPEARANCE OF COATING FILM 失效
公开(公告)号：JPH03243795A
公开(公告)日：1991-10-30
申请号：JP3740090
申请日：1990-02-20
申请人： KAWASAKI STEEL CO
发明人： KOTANI KEISUKE
IPC分类号： C25D9/10 , C25D13/02 , C25D15/02
摘要： PURPOSE:To stably produce a silicon steel sheet having fine appearance of its coating film by electrodepositing SiO2 in a sodium silicate soln. contg. specified metal ions before process annealing in a stage for producing a grain- oriented silicon steel sheet. CONSTITUTION:SiO2 is electrodeposited on the surface of a cold-rolled silicon steel sheet by 0.01-2 g/m in a sodium silicate soln. contg. 0.1-10 g/l metal ions of one or more among Fe, Cu, Al, Sn, Se, Ni, Cr, Mn and Ti before process annealing in a stage for producing a grain-oriented silicon steel sheet. The silicon steel sheet with the electrodeposited SiO2 is then subjected to process annealing and finish annealing to produce a grain-oriented silicon steel sheet having fine appearance of its coating film.

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