C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
38/22, 148/8
C21D 8/12 (2006.01) B23P 15/00 (2006.01) C23C 22/74 (2006.01) H01F 1/16 (2006.01)
Patent
CA 1246968
- 32 - GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING STABLE MAGNETIC PROPERTIES RESISTANT TO STRESS-RELIEF ANNEALING, AND METHOD AND APPARATUS FOR PRODUCING THE SAME ABSTRACT OF THE DISCLOSURE A grain-oriented electrical steel sheet having a low watt loss after stress relief annealing is proposed. The steel sheet, which is final texture annealed, and to which tension is imparted, has a number of recessed parts on the surface thereof forming indentations into the steel sheet body having a depth in the range of from 0.01 to 0.1 mm. The recessed parts are filled with a composition having a coefficient of thermal expansion smaller than that of the steel sheet body. From the recessed parts and the composition the magnetic domains are subdivided.
494900
Hirose Kukuji
Kobayashi Hisashi
Nakamura Motoharu
Tsukada Toshio
Yamashita Hirofumi
Goudreau Gage Dubuc
Nippon Steel Corporation
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