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1. 发明专利

CA2032502C METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEETS HAVING IMPROVED MAGNETIC PROPERTIES 未知
公开(公告)号：CA2032502C
公开(公告)日：1997-10-14
申请号：CA2032502
申请日：1990-05-08
申请人： KAWASAKI STEEL CO
发明人： OBARA TAKASHI , TAKEUCHI FUMIHIKO , MANABE MASAHIKO , IIDA YOSHIAKI , TAKAMIYA TOSHITO
IPC分类号： C21D8/12
摘要： This invention not only improves the formation of fine crystal structure and hence the magnetic properties as well as surface properties while utilizing the merits of the hot strip mill at maximum by conducting the rough rolling in the steps for the production of grain oriented silicon steel sheets, particularly hot rolling step at a high temperature and a large draft, but also stably achieves the more improvement of the magnetic properties under a high reliability by accurately controlling the precipitation state of inhibitor at a finish rolling stage in the hot rolling step.

2. 发明专利

DE69210503D1 未知
公开(公告)号：DE69210503D1
公开(公告)日：1996-06-13
申请号：DE69210503
申请日：1992-08-19
申请人： KAWASAKI STEEL CO
发明人： HAYAKAWA YASUYUKI , NISHIIKE UJIHIRO , FUKUDA BUNJIRO , YAMADA MASATAKA , IIDA YOSHIAKI , TAKEUCHI FUMIHIKO , KOMATSUBARA MICHIRO
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , H01F1/16
摘要： A method of producing a grain oriented silicon steel sheet is adapted to lower the iron loss. A silicon steel slab, containing about 2.0 to 4.0 weight % of Si and an inhibitor-forming amount of S, or Se, or both, is hot rolled. After the hot rolled steel sheet is annealed when necessary, the steel sheet is cold rolled into a cold rolled steel sheet having a final thickness by performing cold rolling either one time or a plurality of times with intermediate annealing therebetween, the cold rolled steel sheet then being subjected to decarburization, coating of the surface of the steel sheet with an annealing separation agent mainly comprising MgO, secondary recrystallization annealing, and purification annealing. In the cold rolling step, an oxide layer exists on the surface of the steel sheet. Specifically, in the cold rolling step, rolling oil is supplied only at the entrance of the rolling mill used, and an oxide layer having a thickness of about 0.05 to 5 mu m is generated. Or, an outer oxide layer of an oxide layer structure generated on the surface of the steel sheet after hot rolling or intermediate annealing, is removed, and an inner oxide layer of a thickness of about 0.05 to 5 mu m is maintained on the surface, the resultant steel sheet then being subjected to cold rolling.

3. 发明专利

CA2033059A1 PROCESS FOR PRODUCING GRAIN ORIENTED SILICON STEEL SHEETS HAVING EXCELLENT MAGNETIC PROPERTIES 未知
公开(公告)号：CA2033059A1
公开(公告)日：1990-11-16
申请号：CA2033059
申请日：1990-05-15
申请人： KAWASAKI STEEL CO
发明人： KOMATSUBARA MICHIRO , KUROSAWA MITSUMASA , HAYAKAWA YASUYUKI , IIDA YOSHIAKI , SADAYORI TOSHIO
IPC分类号： C21D8/12
摘要： A directional silicon steel sheet excellent in magnetic properties can be manufactured with a high productivity in a stabilized manner by effectively combining tandem rolling with aging treatment particularly in the final cold rolling step. The process comprises first conducting tandem rolling, then conducting continuous heat treatment, desirably, under an applied tension, and finally conducting cold rolling to attain a target sheet thickness.

4. 发明专利

CA2032502A1 METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEETS HAVING IMPROVED MAGNETIC PROPERTIES 未知
公开(公告)号：CA2032502A1
公开(公告)日：1990-11-09
申请号：CA2032502
申请日：1990-05-08
申请人： KAWASAKI STEEL CO
发明人： TAKAMIYA TOSHITO , MANABE MASAHIKO , TAKEUCHI FUMIHIKO , OBARA TAKASHI , IIDA YOSHIAKI
IPC分类号： C21D8/12
摘要： A directional silicon steel sheet can be manufactured by conducting rough rolling under a high-temperature and high-pressure condition in the hot rolling step to thereby achieve a fine crystalline structure and improve the magnetic properties, while fully utilizing the advantages of a hot strip mill, and to improve the surface properties as well. The magnetic properties can be further improved with a high reliability in a stabilized manner by appropriately controlling the state of deposition of an inhibitor in the finish rolling stage of a hot rolling step.

5. 发明专利

CA2076483C METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEET HAVING LOW IRON LOSS 未知
公开(公告)号：CA2076483C
公开(公告)日：1997-10-14
申请号：CA2076483
申请日：1992-08-20
申请人： KAWASAKI STEEL CO
发明人： NISHIIKE UJIHIRO , HAYAKAWA YASUYUKI , IIDA YOSHIAKI , YAMADA MASATAKA , FUKUDA BUNJIRO , KOMATSUBARA MICHIRO , TAKEUCHI FUMIHIKO
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , H01F1/16
摘要： A method of producing a grain oriented silicon steel sheet is adapted to lower the iron loss. A silicon steel slab, containing about 2.0 to 4.0 weight % of Si and an inhibitor-forming amount of S, or Se, or both, is hot rolled. After the hot rolled steel sheet is annealed when necessary, the steel sheet is cold rolled into a cold rolled steel sheet having a final thickness by performing cold rolling either one time or a plurality of times with intermediate annealing therebetween, the cold rolled steel sheet then being subjected to decarburization, coating of the surface of the steel sheet with an annealing separation agent mainly comprising MgO, secondary recrystallization annealing, and purification annealing. In the cold rolling step, an oxide layer exists on the surface of the steel sheet. Specifically, in the cold rolling step, rolling oil is supplied only at the entrance of the rolling mill used, and an oxide layer having a thickness of about 0.05 to 5 .mu.m is generated. Or, an outer oxide layer of an oxide layer structure generated on the surface of the steel sheet after hot rolling or intermediate annealing, is removed, and an inner oxide layer of a thickness of about 0.05 to 5 .mu.m is maintained on the surface, the resultant steel sheet then being subjected to cold rolling.

6. 发明专利

CA1332344C METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEETS HAVING EXCELLENT MAGNETIC PROPERTIES 未知
公开(公告)号：CA1332344C
公开(公告)日：1994-10-11
申请号：CA566363
申请日：1988-05-10
申请人： KAWASAKI STEEL CO
发明人： KUROSAWA MITSUMASA , SAKAGUCHI MASAYUKI , IWAMOTO KATSUO , KOBAYASHI YOSHINORI , IIDA YOSHIAKI
IPC分类号： C21D8/12 , C21D9/52 , H01F1/04
摘要： METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEETS HAVING EXCELLENT MAGNETIC PROPERTIES The magnetic properties, particularly magnetic flux density of a grain oriented silicon steel sheet are considerably improved by continuously and/or stops forming regions, wherein-a temperature difference of a secondary recrystallization starting temperature in widthwise direction and/or longitudinal direction of the steel sheet is within a range of 10.degree.C to 200.degree.C, in the steel sheet at a stage before the secondary recrystallization annealing step.

7. 发明专利

CA2076483A1 METHOD OF PRODUCING GRAIN ORIENTED SILICON STEEL SHEET HAVING LOW IRON LOSS 未知
公开(公告)号：CA2076483A1
公开(公告)日：1993-02-21
申请号：CA2076483
申请日：1992-08-20
申请人： KAWASAKI STEEL CO
发明人： HAYAKAWA YASUYUKI , NISHIIKE UJIHIRO , FUKUDA BUNJIRO , YAMADA MASATAKA , IIDA YOSHIAKI , TAKEUCHI FUMIHIKO , KOMATSUBARA MICHIRO
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , H01F1/16
摘要： A method of producing a grain oriented silicon steel sheet is adapted to lower the iron loss. A silicon steel slab, containing about 2.0 to 4.0 weight % of Si and an inhibitor-forming amount of S, or Se, or both, is hot rolled. After the hot rolled steel sheet is annealed when necessary, the steel sheet is cold rolled into a cold rolled steel sheet having a final thickness by performing cold rolling either one time or a plurality of times with intermediate annealing therebetween, the cold rolled steel sheet then being subjected to decarburization, coating of the surface of the steel sheet with an annealing separation agent mainly comprising MgO, secondary recrystallization annealing, and purification annealing. In the cold rolling step, an oxide layer exists on the surface of the steel sheet. Specifically, in the cold rolling step, rolling oil is supplied only at the entrance of the rolling mill used, and an oxide layer having a thickness of about 0.05 to 5 mu m is generated. Or, an outer oxide layer of an oxide layer structure generated on the surface of the steel sheet after hot rolling or intermediate annealing, is removed, and an inner oxide layer of a thickness of about 0.05 to 5 mu m is maintained on the surface, the resultant steel sheet then being subjected to cold rolling.

8. 发明专利

NO138772C 未知
公开(公告)号：NO138772C
公开(公告)日：1978-11-08
申请号：NO750610
申请日：1975-02-24
申请人： KAWASAKI STEEL CO
发明人： SHIMIZU YOH , IIDA YOSHIAKI , GOTO TOMOMICHI , MITSUNORI HIROMI , MATOBA ISAO
IPC分类号： C22C38/00 , C21D8/12 , H01F1/16 , C21D1/78

9. 发明专利

AU7854175A PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEETS 未知
公开(公告)号：AU7854175A
公开(公告)日：1976-08-26
申请号：AU7854175
申请日：1975-02-25
申请人： KAWASAKI STEEL CO
发明人： SHIMIZU YOH , IIDA YOSHIAKI , GOTO TOMOMICHI , MITSUNORI HIROMI , MATOBA ISAO
IPC分类号： C22C38/00 , C21D8/12 , H01F1/16 , C22C39/54 , C22C39/30 , C22C39/46

10. 发明专利

DE69131416T2 未知
公开(公告)号：DE69131416T2
公开(公告)日：2000-01-13
申请号：DE69131416
申请日：1991-12-09
申请人： KAWASAKI STEEL CO
发明人： MANABE MASAHIKO , MORITA KAZUMI , MURO YOSHINARI , KAN TAKAHIRO , IIDA YOSHIAKI , KOBAYASHI HIDEO , OBARA TAKASHI
IPC分类号： C21D8/12
摘要： A method of producing a non-oriented electromagnetic steel strip by subjecting a low-carbon steel slab to hot-rolling, cold rolling at a small reduction and first annealing. In order to improve magnetic flux density and surface appearance of the product, specific conditions are employed so as to coarsen the crystalline structure to obtain a controlled and moderate crystal grain size after the annealing. The slab is cold-rolled at a rolling reduction of about 5 to 15 % and is subjected to first annealing by heating at a rate of about 3 DEG C/sec or higher and holding the strip for about 5 to 30 seconds at 850 DEG C to the A3 transformation temperature of the steel, while controlling the crystal grain size to about 100 to 200 mu m after first annealing.

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