Title:
VERY HIGH MAGNETIC FLUX DENSITY ORIENTED ELECTROMAGNETIC STEEL PLATE
Document Type and Number:
Japanese Patent JP3656913
Kind Code:
B2
Abstract:
PURPOSE: To improve crystal orientation and reduce iron loss, by a method wherein a specified amount of Si and Bi is contained, magnetic flux density is larger than a specified value, and grain diameters of matrix occupy a specified area ratios in the cold rolling direction and in the vertical direction thereof.
CONSTITUTION: The condition for iron loss reduction which a manufactured product must possess is an oriented electromagnetic steel plate which contains, as inevitable components, Si: 2.5-4.0 %, and Bi: 0.0005-0.05% in weight, and the magnetic flux density B8 is very high and 1.95T or higher. The crystal grain diameters of matrix which are 50mm or smaller and 5mm or larger in the direction perpendicular to cold rolling and 300mm or smaller and 10mm or larger in the cold rolling direction occupy 80% in area ratio. Hence the magnetic flux density is very high, the iron loss after magnetic domain controlled is excellent and 0.90W/kg in the case of a 0.30mm product. When fine secondary recrystallization grains excellent in orientation are suitably contained, excellent product whose iron loss is 0.95W/kg or lower can be obtained without magnetic domain control, and contributes energy saving for an electric apparatus like a transformer.
Inventors:
Kunihide Takashima
Ryutaro Kawamata
Ryutaro Kawamata
Application Number:
JP24069892A
Publication Date:
June 08, 2005
Filing Date:
September 09, 1992
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21D8/12; C22C38/00; H01F1/16; (IPC1-7): H01F1/16; C21D8/12; C22C38/00
Domestic Patent References:
| JP62167822A | ||||
| JP5178733A | ||||
| JP6059045A |
Attorney, Agent or Firm:
Hiroaki Tamura
Tomoyuki Yabuki
Tomoyuki Yabuki