C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/12 (2006.01) C22C 38/02 (2006.01) C22C 38/08 (2006.01) C22C 38/60 (2006.01) H01F 3/02 (2006.01)
Patent
CA 2286495
Grain-oriented magnetic steel sheet made by the method comprising of hot rolling and final finish annealing, wherein (1) the O content in the steel slab is limited to up to about 30 wtppm; (2) for the entire steel sheet including an oxide film before final finish annealing, from among impurities, the A1 content is limited to up to about 100 wtppm, and the contents of B, V, Nb, Se, S, and N, to up to about 50 wtppm; and (3) during final finish annealing, the N content in, the steel is, at least in the temperature region of from about 850 to 950°C, limited within the range of from about 6 to 80 wtppm.
Feuille d'acier magnétique à grains orientés produite par un procédé comprenant un laminage à chaud et un recuit final de finition, où (1) la teneur de O dans la brame d'acier est limitée à jusqu'à environ 30 ppm en poids; (2) en ce qui concerne la feuille d'acier en entier, y compris une couche oxydée avant le recuit final de finition, parmi les impuretés, la teneur de A1 est limitée à jusqu'à environ 100 ppm en poids, et la teneur de B, V, Nb, Se, S et N, à jusqu'à environ 50 ppm en poids, et (3) durant le recuit final de finition, la teneur en N dans l'acier est au moins dans le voisinage de température d'environ 850 à 950° C, limité dans une gamme allant d'environ 6 à 80 ppm en poids.
Hayakawa Yasuyuki
Komatsubara Michiro
Kurosawa Mitsumasa
Jfe Steel Corporation
Kawasaki Steel Corporation
Smart & Biggar
LandOfFree
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