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41. 发明专利

JPS62167822A PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET OF EXTREMELY LOW IRON LOSS 失效
公开(公告)号：JPS62167822A
公开(公告)日：1987-07-24
申请号：JP20269186
申请日：1986-08-30
申请人： KAWASAKI STEEL CO
发明人： SHIMIZU HIROSHI , SHISHIDO HIROSHI , ITO ISAO , SHIMANAKA HIROSHI
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , C23C22/00
摘要： PURPOSE:To obtain an extremely low iron loss by combining three things; the reduction of the sheet thickness of a product, the formation of a forsterite film on the surface of a steel sheet to an adequate thickness and the reduction of the crystal grain size of the product. CONSTITUTION:A grain oriented silicon steel stock contg., by weight %, 2-4 Si, 0.01-0.035>=1 kinds of Se and S as an inhibitor, and 0.01-0.08>=1 kinds among Sb, As, Bi, and Sn is used. Such steel stock is subjected to hot rolling then to one pass or >=2 passes of cold rolling including intermediate annealing to a final sheet thickness of 0.15-0.25mm thickness. The steel sheet is then subjected to decarburization annealing and after a separating agent for annealing is coated thereon, the steel sheet is subjected to the final annealing to effect secondary recrystallization and to form the forsterite film at 1-4g/m per face on the surface of the steel sheet. The steel sheet is held for 0.1-15min at 900-1,050 deg.C and the secondary recrystallization is completed at 800-900 deg.C prior to the final annealing to maintain the average crystal grain size after the secondary recrystallization at 1-6mm.

42. 发明专利

JPS62167821A PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET OF EXTREMELY LOW IRON LOSS 失效
公开(公告)号：JPS62167821A
公开(公告)日：1987-07-24
申请号：JP20269086
申请日：1986-08-30
申请人： KAWASAKI STEEL CO
发明人： SHIMIZU HIROSHI , SHISHIDO HIROSHI , ITO ISAO , SHIMANAKA HIROSHI
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , C23C22/00
摘要： PURPOSE:To obtain an extremely low iron loss by combining three things; the reduction of the sheet thickness of a product, the formation of a forsterite film on the surface of a steel sheet to an adequate thickness and the reduction of the crystal grain size of the product. CONSTITUTION:A grain oriented silicon steel stock contg., by weight %, 2-4 Si, 0.01-0.035>=1 kinds of Se and S as an inhibitor, and 0.01-0.08>=1 kinds among Sb, As, Bi, and Sn is used. Such steel stock is subjected to hot rolling then to one pass or >=2 passes of cold rolling including intermediate annealing to a final sheet thickness of 0.15-0.25mm thickness. The steel sheet is then subjected to decarburization annealing and after a separating agent for annealing is coated thereon, the steel sheet is subjected to the final annealing to effect secondary recrystallization and to form the forsterite film at 1-4g/m per face on the surface of the steel sheet. Then the heating rate to attain the decarburization annealing temp. after the final cold rolling is controlled to maintain the average crystal grain size after the secondary recrystallization to a 1-6mm range.

43. 发明专利

JPS62120427A METHOD FOR ANNEALING HOT ROLLED SILICON STEEL SHEET 失效
公开(公告)号：JPS62120427A
公开(公告)日：1987-06-01
申请号：JP25845585
申请日：1985-11-20
申请人： KAWASAKI STEEL CO
发明人： KOBAYASHI YOSHINORI , MORITA KAZUMI , SHIMIZU HIROSHI , ADACHI KAZUNARI
IPC分类号： C21D8/12
摘要： PURPOSE:To considerably improve the suitability of a hot rolled sheet to descaling after annealing by properly controlling conditions during the annealing of the sheet. CONSTITUTION:A silicon steel slab is hot rolled and the resulting hot rolled sheet is annealed, descaled and passed through conventional stages for manufacturing a silicon steel sheet to manufacture a silicon steel sheet. The stages include one or two cold rolling stages. When the hot rolled sheet is annealed, annealing is carried out in an atmosphere of combustion gas having =400 deg.C.

44. 发明专利

JPS62102506A MANUFACTURE OF NON-ORIENTED SILICON STEEL PLATE 失效
公开(公告)号：JPS62102506A
公开(公告)日：1987-05-13
申请号：JP24041985
申请日：1985-10-29
申请人： KAWASAKI STEEL CO
发明人： KOBAYASHI YOSHINORI , SHIMIZU HIROSHI
IPC分类号： H01F1/16
摘要： PURPOSE:To obtain a non-oriented silicon steel plate which has excellent magnetic characteristics by controlling each final finish annealing cycle after hot rolled plate annealing and/or cold rolling under suitable conditions. CONSTITUTION:A non-oriented silicon steel plate slab which contains 4.0wt% or less Si and 20ppm or less S, 20ppm or less P and 30ppm or less N as an impurity is hot-rolled and is after the obtained hot-rolled plate is continuously annealed, made into a final thickness by one cold rolling and in the manufacture of the non-oriented silicon steel plate consisting of the later finish annealing process series, the annealed hot roll plate is rapidly heated by heating speed of 10 deg.C/sec to a temperature range of 800-1,200 deg.C, maintained at the temperature range for the time of 90sec or less, then cooled under the condition of cooling speed 10-100 deg.C/sec thus obtaining the non-oriented silicon steel plate which has excellent magnetic characteristics.

45. 发明专利

JPS61270334A PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET 失效
公开(公告)号：JPS61270334A
公开(公告)日：1986-11-29
申请号：JP10923085
申请日：1985-05-23
申请人： KAWASAKI STEEL CO
发明人： SHIMIZU HIROSHI , ITO ISAO
IPC分类号： H01F1/18 , C21D8/12 , H01F1/16
摘要： PURPOSE:To produce a grain oriented silicon steel sheet having excellent magnetic characteristics by subjecting a silicon steel slab having the specific compsn. contg. C, Si, Mn, S and Se to hot rolling and cold rolling under specific conditions then to decarburization and recrystallization annealing and annealing for dulling. CONSTITUTION:The slab for the silicon steel consisting of the compsn. contg. 0.02-0.08wt% C, 2.0-4.5% Si, 0.01-0.10% Mn and 0.0050-0.10% at least one kind of either S and Se is hot rolled and is then subjected to one pass or two passes of cold rolling including intermediate annealing to the final sheet thickness. The cold rolled sheet is thereafter subjected to decarburization and primary recrystallization annealing in wet hydrogen. A separating agent for annealing consisting essentially of MgO is coated on the surface and such sheet is subjected to secondary recrystallization annealing followed by annealing for dulling. The above-mentioned hot rolling is executed under the conditions of =0.27 coefft. of friction between rolling rolls and ingot and >=30% draft. The integration degree of the Goss orientations in the surface layer of the hot rolled sheet is thereby increased and the grain oriented silicon steel sheet having the excellent magnetic characteristics is obtd.

46. 发明专利

JPS6145696B2 失效
公开(公告)号：JPS6145696B2
公开(公告)日：1986-10-09
申请号：JP11290483
申请日：1983-06-24
申请人： KAWASAKI STEEL CO
发明人： SHISHIDO HIROSHI , KAN TAKAHIRO , SHIMIZU HIROSHI , ITO ISAO
IPC分类号： C22C38/00 , B22D11/06 , C21D8/12 , C22C38/18 , C22C38/34 , C22C45/02 , H01F1/16

47. 发明专利

JPS61165206A METHOD AND INSTALLATION FOR CONTINUOUSLY COLD ROLLING SPECIAL STEEL 失效
公开(公告)号：JPS61165206A
公开(公告)日：1986-07-25
申请号：JP555985
申请日：1985-01-16
申请人： KAWASAKI STEEL CO
发明人： NISHIDE TERUYUKI , SHIMIZU HIROSHI , SHIRAISHI NORIHISA
IPC分类号： B21B1/28 , B21B3/00 , C21D8/02 , C21D9/46
摘要： PURPOSE:To roll efficiently and continuously a steel strip through one process by heating the strip, rolled into the intermediate sheet-thickness to a specific temperature to maintain the strip at said temperature on the way of rolling, and cooling it to roll under a specific rolling reduction at the next and subsequent stands in continuously cold rolling the strip by multi-high tandem mills. CONSTITUTION:A steel strip 6 is uncoiled from an uncoiler 1, and the tail end of a preceding strip and the front end of a succeeding strip are joined together into a joined strip 6 by a welder 2. A steel strip storing device 3 stores the fixed amount of strip because the rolling is continued even when the welding is operated. The strip 6 delivered from the device 3 is rolled in sequence into the intermediate sheet-thickness by the mills #1-#3. Next, the strip 6 is heated by a heat treatment device 7 and is maintained at the temperature of 200-400 deg.C for a proper time, before it is cooled to the temperature suitable for cold rolling. After finishing the heat treatment, the strip 6 is successively rolled under >=20% rolling reduction by the next stand #4 and subsequent ones into the prescribed thickness and is wound up in sequence by coiler 5.

48. 发明专利

JPS6130009B2 失效
公开(公告)号：JPS6130009B2
公开(公告)日：1986-07-10
申请号：JP20650381
申请日：1981-12-21
申请人： KAWASAKI STEEL CO
发明人： NISHIIKEUJI YUTAKA , SHIMIZU HIROSHI
IPC分类号： H01F1/18 , C21D8/12 , C21D9/46 , C23C22/00

49. 发明专利

JPS605852A INTRASURFACE NONORIENTED ELECTRICAL STEEL SHEET WITH HIGH CORROSION RESISTANCE 失效
公开(公告)号：JPS605852A
公开(公告)日：1985-01-12
申请号：JP11290483
申请日：1983-06-24
申请人： KAWASAKI STEEL CO
发明人： SHISHIDO HIROSHI , KAN TAKAHIRO , SHIMIZU HIROSHI , ITOU ISAO
IPC分类号： C22C38/00 , B22D11/06 , C21D8/12 , C22C38/18 , C22C38/34 , C22C45/02 , H01F1/16
摘要： PURPOSE:To obtain the titled steel sheet with improved corrosion resistance and reduced iron loss by forming a rapidly cooled thin strip made of an Fe-Cr composition contg. a specified amount of Cr and having a stable alpha-phase and by providing a specified aggregated texture. CONSTITUTION:A Cr steel contg. 13-20wt% Cr as a principal component is refined, and the molten steel is sprayed on the surface of a single roll rotating at high speed or the gap between two rolls rotating at high speed from a nozzle having many pores or a slit to form a rapidly cooled thin strip of about 30- 500mum thickness. This thin strip is made of an Fe-Cr composition having a stable alpha-phase, and an intrasurface nonoriented electrical steel sheet with high corrosion resistance is obtd. This steel sheet has an aggregated texture in which the (100) planes are practically parallel to the surface of the sheet.

50. 发明专利

JPS5855212B2 JPS5855212B2 - 失效
公开(公告)号：JPS5855212B2
公开(公告)日：1983-12-08
申请号：JP16928980
申请日：1980-12-01
申请人： Kawasaki Steel Co
发明人： SHISHIDO HIROSHI , SHIMIZU HIROSHI , ITO ISAO , SHIMANAKA HIROSHI
IPC分类号： H01F1/16 , C21D8/12
CPC分类号： C21D8/12

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