Kenyon & Kenyon
Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same
 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. 
Nippon Steel Corporation
C C B H
C23C C21D B23P H01F
inventional inventional inventional inventional
Motoharu Kikuji Hisashi Toshio Hirofumi
Nakamura Hirose Kobayashi Tsukada Yamashita