Title:
高珪素方向性電磁鋼板の製造方法
Document Type and Number:
Japanese Patent JP4484711
Kind Code:
B2
Abstract:
A method for manufacturing a high silicon grain-oriented electrical steel sheet. In a method for manufacturing a high silicon grain-oriented electrical steel sheet, comprising the steps of: reheating and hot-rolling a steel slab to produce a hot-rolled steel sheet; annealing the hot-rolled sheet and cold rolling the annealed steel sheet so as to adjust a thickness of the steel sheet; decarburization annealing the cold rolled steel sheet; and finish-annealing the decarburization annealed steel sheet for secondary recrystallization, the improved method further comprising the step of: coating a powder coating agent for siliconization on a surface of the decarburization annealed steel sheet in a slurry state, the powder coating agent including 100 part by weight of MgO powder and 0.5-120 part by weight of sintered powder of Fe-Si compound containing 25-70 wt % Si sintered powder, the sintered powder having a grain size of -325 mesh; drying the resultant decarburization annealed steel sheet; and finish annealing the steel sheet under a conventional condition.
Inventors:
Choi Cutheon
Woo Jung Saw
Kim Jae Kwan
Woo Jung Saw
Kim Jae Kwan
Application Number:
JP2004551260A
Publication Date:
June 16, 2010
Filing Date:
November 11, 2003
Export Citation:
Assignee:
POSCO
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/06; C23C10/02; C23C10/20; C23C10/30; C23C10/44; C23C10/46; H01F1/16
Domestic Patent References:
| JP2000129356A | ||||
| JP63026329A | ||||
| JP5098398A | ||||
| JP61052358A | ||||
| JP6088170A |
Attorney, Agent or Firm:
Mikio Yoshimiya