| 摘要 |
PCT No. PCT/JP86/00087 Sec. 371 Date Sep. 9, 1986 Sec. 102(e) Date Sep. 9, 1986 PCT Filed Feb. 21, 1986 PCT Pub. No. WO86/04929 PCT Pub. Date Aug. 28, 1986.As to a method of producing grain oriented silicon steel sheets used in stacked lamination-core transformers, which realizes the improvement of magnetic properties, particularly extreme reduction of iron loss irrespectively of a high temperature heat treatment such as strain relief annealing and can attain the improvement of compressive stress dependence of magnetostriction and lamination factor, it is a main point that the steel sheet after the finish annealing is provided on its surface with a thin coat of at least one layer composed mainly of nitrides and carbides of Ti, Zr, Hf, V, Nb, Ta, Mn, Cr, Mo, W, Co, Ni, Al, B and Si and strongly adhered to the surface of the steel sheet through a mixed layer of base metal and thin coat.
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