Process for production of grain oriented electrical steel sheet

Details Process for production of grain oriented electrical steel sheet Process for production of grain oriented electrical steel sheet

1994-05-20

1996-08-13

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, C21D 812

Patent

active

055452639

ABSTRACT:
In the present invention, a slab of a silicon steel comprising usual components is hot-rolled while adjusting the hot rolling-finish temperature at 750.degree. to 1150.degree. C. and the cumulative reduction ratio of final three passes to at least 40%, or the above-mentioned silicon steel slab is hot-rolled at the above-mentioned hot rolling-finish temperature, the hot-rolled steel sheet is held at a temperature not lower than 35.degree. C. lower than the finish temperature for at least 1 second, and the steel sheet is wound at a winding temperature lower than 700.degree. C. Successively, the hot-rolled steel sheet is subjected, without annealing of the hot-rolled steel sheet, to cold rolling at a reduction ratio of at least 80%, decarburization annealing, and final finish annealing. According to this process, a grain oriented electrical steel sheet having superior magnetic properties can be prepared.

REFERENCES:
patent: 5039359 (1991-08-01), Yoshitomi et al.
patent: 5261971 (1993-11-01), Yoshitomi et al.
Patent Abstracts of Japan, vol. 6, No. 250 (C-139) [1128], Dec. 9, 1982, publication No. 57-145931.
Patent Abstracts of Japan, vol. 9, No. 301 (C-316) [2024], Nov. 28, 1985, publication No. 60-138014.

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