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1. 发明专利

JPH04329828A PRODUCTION OF GRAIN-ORIENTED SILICON STEEL SHEET EXCELLENT IN MAGNETIC PROPERTY 失效
公开(公告)号：JPH04329828A
公开(公告)日：1992-11-18
申请号：JP9914591
申请日：1991-04-30
申请人： KAWASAKI STEEL CO
发明人： NAMURA NATSUKI
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60
摘要： PURPOSE:To minimize the oxide film formed at the time of decarburizing annealing and to provide superior magnetic properties by removing the oxide film after process annealing, lowering the dew point in the rear part of a soaking zone in a decarburizing annealing furnace, and also regulating the atmosphere in the above-mentioned rear part to a weak-oxidizing atmosphere. CONSTITUTION:A hot rolled plate of silicon steel having a composition containing, by weight, 0.02-0.1% C, 2.5-4.0% Si, 0.01-0.10% Mn, and 0.005-0.06%, in total, of one or more elements among S, Se, and Al is subjected to two-time or more cold rollings and process annealing, and is formed to the final sheet thickness. Cold rolling is done after the removal of the oxide scale formed at the steel sheet surface in the above-mentioned process annealing stage. Subsequently, at the time of decarburizing annealing, the atmosphere is regulated to strong-oxidizing atmosphere in the fore half alone and to weak-oxidizing atmosphere in the back half, by which the formation of the oxide film is minimized. A difference in average dew point between the front part and the rear part of the soaking zone in the furnace at the time of decarburizing annealing is regulated to >=10 deg.C, preferably to >=30 deg.C.

2. 发明专利

JPS62222012A DEVICE FOR ROTATING BOLT FOR MOUNTING SIPHON TYPE CONVERTER TAP HOLE TO FURNACE BODY 失效
公开(公告)号：JPS62222012A
公开(公告)日：1987-09-30
申请号：JP6440286
申请日：1986-03-22
申请人： KAWASAKI HEAVY IND LTD , KAWASAKI STEEL CO
发明人： SAKAMOTO MANABU , TATSUTA SATOSHI , MURATA AKIRA , NAMURA NATSUKI , TAMADA SHIGEMOTO , KAWASAKI YOSHINORI , MISAKI NORIO
IPC分类号： C21C5/46
摘要： PURPOSE:To easily and quickly bolt a tap hole to furnace body by building a universal joint into a rotary cylinder fixed to a stem part of a rotationary driving means and elastically supporting a socket for fitting a nut to the periph ery thereof. CONSTITUTION:A mounting bolt 21 is fitted to a rotating device 20 of the furnace body mounting bolt and the nut 22 is sacrewed to the bottom end thereof. The socket 23 contains the nut 22 and supports the mounting bolt 21. A sand 35 is lifted by a driving means 31 for lifting to raise the entire part of the driving system. A hydraulic motor 25 is run to rotate the socket 23 via the universal joint 24 and to screw the nut 22 to the mounting bolt 21 when a head 21a of the mounting bolt 21 inserted into the hole 41 of the flange 4a of a tap hole mounting part 4. The rotation of the nut 22 is continued and the nut 22 raises a thread part 21b of the mounting bolt 21 to lift a collar 45, by which the mounting part 4 and the tap hole 1 are fastened via a padding 46.

3. 发明专利

JPS62222009A METHOD AND DEVICE FOR CENTERING TO MOUNT SIPHON TYPE CONVERTER TAP HOLE TO FURNACE BODY 失效
公开(公告)号：JPS62222009A
公开(公告)日：1987-09-30
申请号：JP6439986
申请日：1986-03-22
申请人： KAWASAKI HEAVY IND LTD , KAWASAKI STEEL CO
发明人： SAKAMOTO MANABU , TATSUTA SATOSHI , MURATA AKIRA , NAMURA NATSUKI , TAMADA SHIGEMOTO , KAWASAKI YOSHINORI , MISAKI NORIO
IPC分类号： C21C5/46
摘要： PURPOSE:To make a centering operation by a remote control in a short period by projecting light from a position of a prescribed distance from the center of a converter tap hole toward a furnace body and making the irradiation point coincident with the position on the furnace body apart at the same distance as the above-mentioned distance from the center of a tap hole mounting part. CONSTITUTION:A siphon type converter tap hole mounting device 6 carrying the siphon type converter tap hole 1 on a lifting frame 16 is carried to the underside of the converter 2. Laser light or the like is projected from a light emitting source 21 in the position existing at the prescribed distance l1 from he center of the converter tap hole 1 toward a light receiving part 22 of the furnace body 3. The irradiation point thereof is made coincident with the target position in the light receiving part 22 on the furnace body 3 apart at the same distance a the above-mentioned distance l1 from the center of the tap hole mounting part 4. Such operation is made by subjecting the lower carriage 8 and upper carriage 9 of a means 14 for moving the siphon type converter gap hole to extension and contraction motions, etc. The centering of the converter tap hole 1 and the tap hole mounting part 4 on the furnace body 3 side is executed with good accuracy by the above-mentioned method.

4. 发明专利

JPH10265851A PRODUCTION OF LOW CORE LOSS GRAIN ORIENTED SILICON STEEL SHEET 失效
公开(公告)号：JPH10265851A
公开(公告)日：1998-10-06
申请号：JP7558797
申请日：1997-03-27
申请人： KAWASAKI STEEL CO
发明人： YASUFUKU MASAO , HINA EIJI , TOFUJI TAKESHI , SATO KEIJI , NAMURA NATSUKI
IPC分类号： C21D8/12 , C25F3/14 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To stably obtain a grain oriented silicon steel sheet which is low in core loss by subjecting a slab for the grain oriented silicon steel sheet to hot rolling and cold rolling to a final thickness, then forming an etching mask, forming linear or dotted grooves by electrolytic etching and subjecting this slab to final finish annealing. SOLUTION: The slab for the grain oriented silicon steel sheet contg. 2 to 4% Si is hot rolled to a hot rolled sheet and this sheet is subjected to one time or >=2 times of cold rolling including intermediate annealing to the cold rolled sheet having the final thickness. Next, an etching resist is applied on the surface of the cold rolled sheet and is dried and backed to form the etching mask. The linear or dotted grooves are formed by the electrolytic etching on the steel sheet surface. Finally, the mask is removed and the steel sheet is subjected to decarburization annealing and final finish annealing, by which the low core loss grain oriented silicon steel sheet is produced. The application of the etching resist maintains the relation -0.25L+90>D>-25L+75 between a mesh size (L) (100 to 200 mesh/inch) and mesh depth D (30 to 60 μm).

5. 发明专利

JPH057908A SIDE TRIMMING METHOD FOR HOT ROLLED STEEL HOOP OF GRAIN ORIENTED SILICON STEEL 失效
公开(公告)号：JPH057908A
公开(公告)日：1993-01-19
申请号：JP15906591
申请日：1991-06-28
申请人： KAWASAKI STEEL CO
发明人： NAMURA NATSUKI , TANAKA TOSHIHIKO
IPC分类号： B21B15/00 , B23D19/06
摘要： PURPOSE:To prevent the generation of a defect of a two-sheet plate generated at the time of side trimming before executing cold rolling of a hot rolled steel hoop of grain oriented silicon steel, and to prevent rupture of the plate at the time of cold rolling in the next process. CONSTITUTION:Side trimming is executed so that the maximum value of an angle made by a lamellar structure of a plate bent by shear against the plate surface becomes

6. 发明专利

JPH0148330B2 失效
公开(公告)号：JPH0148330B2
公开(公告)日：1989-10-18
申请号：JP3450885
申请日：1985-02-25
申请人： KAWASAKI STEEL CO
发明人： TAKE HIDEO , NAMURA NATSUKI
IPC分类号： F27D15/00 , C21C5/36 , C21C7/00 , C21C7/076

7. 发明专利

JPS61266514A TORPEDO LADLE CAR 失效
公开(公告)号：JPS61266514A
公开(公告)日：1986-11-26
申请号：JP10967885
申请日：1985-05-22
申请人： KAWASAKI STEEL CO
发明人： TAKE HIDEO , MATSUMOTO YOICHI , MISAKI NORIO , OKUDA HARUJI , NAMURA NATSUKI
IPC分类号： C21C1/06
摘要： PURPOSE:To provide a torpedo ladle car which has a throat for receiving and delivering a molten iron in the upper part of a freely tiltable furnace body for contg. the molten iron on front and rear carriages movable on rails and which permits efficient primary refining by providing a nozzle for blowing a refining flux to said furnace body. CONSTITUTION:The carriage 4 is separated to the front and rear carriages and the furnace body 6A is freely tiltably supported on the carriages 4 by means of the revolving shafts 8 provided on the front and rear thereof and a tilting device 10 provided to either of the carriages. The body 6A has the throat 16 in the upper part at one end thereof and is provided with the nozzle 21 for blowing the refining flux for the molten iron 18 in the upper part at the other end. The furnace body receives the molten iron in this state through the throat 16. Tiltable moving rails 22 are provided in the rails 2 from, for example, the blast furnace toward a steel making plant and a flux storage and blowing device is provided near the same. The torpedo ladle car is locked by a fixing device 24. The torpedo ladle car is then tilted as shown in the figure and the primary refining is executed.

8. 发明专利

JPH1161173A CONTROL OVER PROPERTY OF EMULSION ROLLING OIL 失效
公开(公告)号：JPH1161173A
公开(公告)日：1999-03-05
申请号：JP22132397
申请日：1997-08-18
申请人： KAWASAKI STEEL CO
发明人： OKADA NORIHISA , AKAGI ISAO , NAMURA NATSUKI , KITAHAMA MASANORI , ISHIWATARI AKINOBU
IPC分类号： B21B45/02 , C10M175/04 , C10N30/00 , C10N30/04 , C10N40/24
摘要： PROBLEM TO BE SOLVED: To enable the control over properties of an emulsion rolling oil by using the SiO2 content in the emulsion rolling oil in cold rolling of orientated electromagnetic steel sheets as a control index. SOLUTION: The SiO2 content in an emulsion rolling oil is adopted as a control index in order to maintain the emulsion stability of the emulsion rolling oil used in a circulating feed system in cold rolling of silicon-containing steel sheets, especially orientated electromagnetic steel sheets. The SiO2 content is preferably kept at

9. 发明专利

JPH1161167A OIL COMPOSITION FOR COLD ROLLING 失效
公开(公告)号：JPH1161167A
公开(公告)日：1999-03-05
申请号：JP22135297
申请日：1997-08-18
申请人： KAWASAKI STEEL CO
发明人： OKADA NORIHISA , NAMURA NATSUKI , KAMIMURA ATSURO , AKAGI ISAO , ISHIWATARI AKINOBU
IPC分类号： C10M161/00 , C10M169/04 , C10M173/00 , C10N20/04 , C10N30/00 , C10N30/04 , C10N30/06 , C10N40/24
摘要： PROBLEM TO BE SOLVED: To obtain an oil composition for cold rolling having excellent emulsion stability and rolling lubricity by compounding a base oil with a cationic emulsifier, a nonionic high-molecular compound and a higher aliphatic alcohol. SOLUTION: This composition is composed of the following components (a) to (d) : (a) a base oil selected from an animal or vegetable oil, a mineral oil and an ester; (b) a cationic emulsifier obtained by adding an N,N- dialkylaminoalkylamine to a copolymer of an α-olefin and a maleic anhydride; (c) a nonionic high-molecular compound obtained by grafting a polyethylene glycol as a hydrophilic group with a modified polyester or polyolefin as a lipophilic group in a comb shape; and (d) a higher aliphatic alcohol. The composition has an excellent emulsion stability, i.e., a low physical unit of oil, and high rolling lubricity against a large amount of iron powder which is generated in cold rolling of common steel, stainless steel or silicon steel, especially silicon steel, and the composition can give excellent surface roughness of rolled material after the cold rolling.

10. 发明专利

JPH02173210A COLD ROLLING METHOD FOR GRAIN ORIENTED ELECTRICAL SILICON STEEL SHEET 失效
公开(公告)号：JPH02173210A
公开(公告)日：1990-07-04
申请号：JP32596988
申请日：1988-12-26
申请人： KAWASAKI STEEL CO
发明人： ONO TOMOMUTSU , NAMURA NATSUKI , NAKANISHI TOSHINAGA , NAITO TADASHI
IPC分类号： B21B1/28 , B21B3/00 , B21B3/02 , C21D8/12
摘要： PURPOSE:To effectively lower the surface roughness of a steel sheet without requiring additional stages by setting the draft distribution of the final stand of tandem mills larger than the draft distribution of the other stands. CONSTITUTION:The grain oriented electrical silicon steel sheet is cold rolled with the tandem mills of the plural stands. The draft distribution of the final stand is set at 1.1 to 4 times the draft distribution of the other stands. The surface roughness of the steel sheet is effectively lowered by this cold rolling treatment and the grain oriented electrical silicon steel sheet having excellent magnetic characteristics is obtd.

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