Title:
【発明の名称】方向性けい素鋼用スラブの加熱方法および加熱炉
Document Type and Number:
Japanese Patent JP2815904
Kind Code:
B2
Abstract:
PURPOSE:To uniformly heat a silicon steel slab over the entire part thereof and to improve the electromagnetic characteristics of the grain oriented silicon steel sheet to be obtd. by the cold rolling after the heating by heating the slab in an induction type heating furnace in the state of disposing exothermic heat insulating plates at both ends of the slab at the time of heating the slab prior to a hot rolling. CONSTITUTION:The silicon steel slab 1 contg. Si at a high ratio and contg., for example, 0.005 to 0.10% at least one kind of inhibitor components, such as S, Se and Al, is disposed in an induction coil 2 of the induction type heating furnace and this coil is energized to heat the slab to >=1300 deg.C. The exothermic heat insulating plates 3, 3 consisting of a stock, such as Fe, which can be induction-heated by the current of the coil 2 are disposed at both ends of the slab 1 in proximity to each other within 200mm in such a manner that the spacings from both ends of the slab 1 can be adjusted by rotation of a supporting rod 4, by which the cooling of both ends of the slab to the temp. lower than the temp. in the central part by heat radiation is prevented and the inhibitor components are uniformly solutionized over the entire part of the slab. The inhibitor components, such as MnS, MnSe and AlN, are uniformly and finely deposited at the time of forming the slab to the sheet material by the hot rolling and cold rolling. The electromagnetic characteristics of the silicon steel sheet which is the final product are thus improved.
More Like This:
Inventors:
Hiroshi Shimizu
Masato Koide
Toshiro Fujiyama
Masato Koide
Toshiro Fujiyama
Application Number:
JP16371989A
Publication Date:
October 27, 1998
Filing Date:
June 28, 1989
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
International Classes:
C21D8/12; C21D1/42; C21D9/00; (IPC1-7): C21D8/12; C21D9/00
Domestic Patent References:
| JP6477894A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)