专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JP2000212723A PRODUCTION OF HIGH SILICON STEEL SHEET GOOD IN SURFACE PROPERTY AND EXCELLENT IN WORKABILITY 失效
公开(公告)号：JP2000212723A
公开(公告)日：2000-08-02
申请号：JP1037799
申请日：1999-01-19
申请人： NIPPON KOKAN KK
发明人： KASAI KATSUJI , HIRATANI TATSUHIKO , OKADA KAZUHISA , FUJITA KOICHIRO
IPC分类号： C23C10/08 , C21D1/76
摘要： PROBLEM TO BE SOLVED: To obtain good surface properties and excellent workability in the steel sheet by incorporating siloxane into SiCl4-contg. gas to be fed to a siliconizing treating furnace, also controlling the containing concn. thereof and controlling an oxygen equivalent in the SiCl4-contg. gas. SOLUTION: A gaseous starting material to be fed to a siliconizing treating furnace 1 is mixed with carrier gas on the downstream side of a flow rate control valve 15, is heated by a heating means before being introduced into the siliconizing treating furnace 1 and is thereafter introduced into the siliconizing treating furnace 1. The contents of oxygen and moisture in the siliconizing treating furnace 1 are normally measured by a continuous measuring apparatus, samples are periodically collected from a steel sheet after siliconizing treatment, and the decarburizing amt. in the steel sheet is measured, based on this data, the concn. of siloxane in an SiCl4+siloxane soln. in an evaporating tank 5 is decided, and the amounts of the SiCl4+siloxane soln. and SiCl4 original soln. to be fed to the evaporating tank 5 by the control of the opening degrees of the flow rate control valves 19 and 13 of soln. feed tubes 8 and 11 so as to control the concn. of siloxane measured by gas chromatography 17 to the value.

12. 发明专利

JPH11293449A PRODUCTION OF SILICON STEEL SHEET HAVING SILICON CONCENTRATION DISTRIBUTION USING SILICONIZING METHOD 失效
公开(公告)号：JPH11293449A
公开(公告)日：1999-10-26
申请号：JP11435798
申请日：1998-04-10
申请人： NIPPON KOKAN KK
发明人： KASAI KATSUJI , YAMAJI TSUNEHIRO , NAMIKAWA MISAO , NINOMIYA HIRONORI , HIRATANI TATSUHIKO
IPC分类号： C23C10/08 , C22C38/00 , C22C38/02 , H01F27/24
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a silicon steel sheet using a siliconizing method capable of obtaining desired magnetic properties without complicating a furnace structure and deteriorating the quality. SOLUTION: Siliconizing treatment by which Si is penetrated from the surface of a steel sheet and diffusing treatment by which the penetrated Si is diffused into the steel sheet are executed in the same gas atmosphere in the same furnace. The treating time and treating interval in the siliconizing treatment and the diffusing treatment are controlled, thereby the siliconizing and diffusing rates are controlled, and the distribution of the Si concn. in the sheet thickness direction of the steel sheet is controlled.

13. 发明专利

JPH11293415A IRON CORE LOW IN RESIDUAL MAGNETIC FLUX DENSITY AND EXCELLENT IN WORKABILITY AND HIGH FREQUENCY CHARACTERISTIC 失效
公开(公告)号：JPH11293415A
公开(公告)日：1999-10-26
申请号：JP11436198
申请日：1998-04-10
申请人： NIPPON KOKAN KK
发明人： YAMAJI TSUNEHIRO , KASAI KATSUJI , NINOMIYA HIRONORI , TAKADA YOSHIICHI , HIRATANI TATSUHIKO
IPC分类号： C23C10/08 , C22C38/00 , C22C38/02 , H01F27/24
摘要： PROBLEM TO BE SOLVED: To provide an iron core composed of a high silicon steel sheet, low in residual density and excellent in workability while maintaining excellent high frequency characteristics. SOLUTION: By a high silicon steel sheet having an Si concn. gradient in which the concn. Si in the outermost surface layer is regulated to 5 to 7 wt.%, the thickness of a high Si concn. layer formed on the surface layer part and in which the concn. of Si is regulated to >=3.5 wt.% is regulated to =0.3 wt.% in the sheet thickness direction, an iron core low in residual magnetic flux density and excellent in workability and high frequency characteristics is composed.

14. 发明专利

JPH116039A HIGH SILICON STEEL SHEET EXCELLENT IN WORKABILITY 失效
公开(公告)号：JPH116039A
公开(公告)日：1999-01-12
申请号：JP16944197
申请日：1997-06-11
申请人： NIPPON KOKAN KK
发明人： FUJITA KOICHIRO , HIRATANI TATSUHIKO , TANAKA YASUSHI
IPC分类号： C23C10/08 , C22C38/00 , C22C38/02 , C22C38/06 , H01F1/147 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To obtain a high silicon steel sheet having excellent workability independently of furnace atmosphere conditions and their fluctuations at siliconizing treatment, final annealing, etc., at the time of manufacture. SOLUTION: This steel sheet has a composition consisting essentially of, by weight, 4-7% Si, 0.0004-0.0020% B, and Fe. Further, it is preferable that this steel sheet has a composition consisting of, by weight, 0-0.01% C, 4-7% Si, 0.0004-0.0020% B, 0-0.5% Mn, 0-0.01% P, 0-0.01% S, 0-0.2% sol.Al, 0-0.01% N, 0-0.02% O, and Fe. In this steel sheet, excellent workability can be obtained owing to the intergranular oxidation inhibiting action of B segregated in the grain boundaries.

15. 发明专利

JPH10256019A WOUND CORE WITH EXCELLENT CORE LOSS 失效
公开(公告)号：JPH10256019A
公开(公告)日：1998-09-25
申请号：JP7902397
申请日：1997-03-13
申请人： NIPPON KOKAN KK
发明人： YAMAJI TSUNEHIRO , TANAKA YASUSHI , HIRATANI TATSUHIKO
IPC分类号： C22C38/02 , G11B5/147 , H01F1/16 , H01F27/25
摘要： PROBLEM TO BE SOLVED: To obtain a wound core in which an interlayer short circuit at a laminated layer face is suppressed effectively by a method wherein the thickness per face of a surface-layer oxide layer on a steel strip is specified at the laminated-layer face after a straightening annealing operation. SOLUTION: The thickness per face of a surface-layer oxide layer on a steel tape at a laminated-layer face after a straightening annealing operation is set at about 10% or lower of the plate thickness of the steel strip. In addition, the depth in the plate-width direction of the steel strip of the surface-layer oxide layer on the steel strip at the laminated-layer face after the straightening annealing operation is set within about 5mm from the edge of the steel strip. As a blank for a wound core, an iron-based grain-oriented magnetic steel sheet, a nonoriented magnetic steel sheet, an amorphous sheet or the like is used. The wound core after the straightening annealing operation may be impregnated with a varnish as it is in a next process. However, plate edge parts at a laminated-layer face are deviated alternately to both sides, and an interlayer short circuit at the laminated-layer face is removed as far as possible. In addition, also a burr is taken into consideration. Thereby, it is possible to manufacture the wound core in which a core loss is low, in which an irregularity in a core loss value is small and which has a stable core loss characteristic.

16. 发明专利

JPH10140300A GRAIN ORIENTED SILICON STEEL SHEET WITH LOW RESIDUAL MAGNETIC FLUX DENSITY 失效
公开(公告)号：JPH10140300A
公开(公告)日：1998-05-26
申请号：JP30995696
申请日：1996-11-07
申请人： NIPPON KOKAN KK
发明人： TAKADA YOSHIICHI , NINOMIYA HIRONORI , NAMIKAWA MISAO , HIRATANI TATSUHIKO
IPC分类号： C22C38/00 , C22C38/02 , C23C10/08 , C23C10/46 , H01F27/245
摘要： PROBLEM TO BE SOLVED: To obtain a grain oriented silicon steel sheet reduced in residual magnetic flux density and capable of preventing rush current due to magnetic deviation without causing an enlargement of the size of equipment, an increase of costs, etc., by forming the concentration gradient of Si in a sheet-thickness direction, regulating the Si concentration in the surface layer so that it is higher than the Si concentration in the sheet-thickness central part, and also regulating the difference between the Si concentration in the surface layer and the lowest Si concentration in the vicinity of the center of sheet thickness to a specific value or above. SOLUTION: This grain oriented silicon steel sheet has a concentration gradient of Si in a sheet-thickness direction, and the Si concentration in the surface layer is higher than the Si concentration in the sheet-thickness central part and a difference between the Si concentration in the surface layer and the lowest Si concentration in the vicinity of the center of sheet thickness is regulated to >=0.5wt.%. The concentration gradient of Si is actively formed in order to reduce residual magnetic flux density. It is preferable to regulate the Si concentration in the surface layer and the average value of Si concentration to

17. 发明专利

JPH09184052A HIGH SILICON STEEL SHEET EXCELLENT IN BENDABILITY 失效
公开(公告)号：JPH09184052A
公开(公告)日：1997-07-15
申请号：JP35360895
申请日：1995-12-29
申请人： NIPPON KOKAN KK
发明人： TANAKA YASUSHI , FUJITA KOICHIRO , HIRATANI TATSUHIKO , YAMAJI TSUNEHIRO
IPC分类号： C22C38/00 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To prevent the breakage of a steel sheet at bending at the time of producing a toroidal core, etc., and to obtain the high silicon steel sheet capable of bending to a smaller bend radius by specifying Si content and also specifying the relation between the average burr height at the edge part of a sheared and blanked steel sheet and the thickness of the steel sheet. SOLUTION: This high silicon steel sheet is a sheared and blanked steel sheet of 4.0-7.0wt.% Si content, in which the average burr height (h) (μm) at the edge part satisfies, in relation with sheet thickness (t)(mm), inequality h/t 67, the breakage of the steel occurs frequently at the time of bending the steel sheet.

18. 发明专利

JPH09176825A PRODUCTION OF HIGH SILICON STEEL SHEET EXCELLENT IN SURFACE PROPERTY 失效
公开(公告)号：JPH09176825A
公开(公告)日：1997-07-08
申请号：JP35158495
申请日：1995-12-26
申请人： NIPPON KOKAN KK
发明人： HIRATANI TATSUHIKO , NINOMIYA HIRONORI , TANAKA YASUSHI
IPC分类号： C23C10/08 , C21D8/12
摘要： PROBLEM TO BE SOLVED: To prevent the generation of pickup caused by the formation of silica by suppressing the formation of silica in a siliconizing zone. SOLUTION: A steel sheet contg.

19. 发明专利

JPH08302432A MANUFACTURE OF HIGH SILICON STEEL STRIP 失效
公开(公告)号：JPH08302432A
公开(公告)日：1996-11-19
申请号：JP13613395
申请日：1995-05-10
申请人： NIPPON KOKAN KK
发明人： KASAI KATSUJI , ABE MASAHIRO , OKADA KAZUHISA , YAMAJI TSUNEHIRO , HIRATANI TATSUHIKO
IPC分类号： C21D1/00 , C21D9/56 , C21D11/00 , F27B9/24
摘要： PURPOSE: To continuously manufacture the high silicon steel strip of excellent surface property free from any dents for a long time in the manufacturing line or the heat treatment line of the high silicon steel strip such as a continuous annealing furnace and a continuous siliconizing furnace. CONSTITUTION: The in-furnace hearth roll circumferential speed to the strip passing speed is reduced in the range where the scraping effect of the deposition is realized and the extension of the strip by the creep is not generated, i.e., the range to satisfy the inequality, 0.3

20. 发明专利

JP2002180214A COLD-ROLLED STEEL SHEET FOR MAGNETIC SHIELD OF COLOR CATHODE RAY TUBE AND ITS PRODUCTION METHOD 失效
公开(公告)号：JP2002180214A
公开(公告)日：2002-06-26
申请号：JP2000385871
申请日：2000-12-19
申请人： NIPPON KOKAN KK
发明人： HIRATANI TATSUHIKO , MATSUOKA HIDEKI , SUGIHARA REIKO , TAWARA KENJI , TAKADA YASUYUKI , TANAKA YASUSHI
IPC分类号： B21B1/22 , B21B3/02 , C21D8/12 , C22C38/00 , C22C38/58 , H01F1/16 , H01J29/02
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive cold-rolled steel sheet for the magnetic shield of color cathode ray tube which has excellent geomagnetic shielding properties effective for suppressing color slippage caused by geomagnetism and obtaining a picture with high definition, and is capable of dealing with the effective utilization of resources, and its production method. SOLUTION: The cold-rolled steel sheet for a magnetic shield of color cathode ray tube has a sheet thickness of 0.05 to 0.5 mm, and has a composition containing, by weight, =0.1 is satisfied. Its non-hysteresis permeability is >=7,500.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式