High flux density grain-oriented electrical steel sheet having i

Details High flux density grain-oriented electrical steel sheet having i High flux density grain-oriented electrical steel sheet having i

1990-10-26

1992-08-25

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148113, H01F 104

Patent

active

051415739

ABSTRACT:
An electrical steel sheet having a very small watt loss can be provided by improving the conventional magnetic domain-controlling treatment. Namely, a high-flux density, grain-oriented electrical steel sheet having a superior watt loss characteristic and a flux density of at least 1.88 T at a magnetizing force of 800 A/m, which comprises, as the steel sheet components, up to 0.0030% by weight of C, 2.8 to 4.5% by weight of Si, 0.045 to 0.100% by weight of Mn, up to 0.0050% by weight of one or two elements selected from the group consisting of S and Se, up to 0.0050% by weight of Al, up to 0.0030% by weight of N, 0.03 to 0.25% by weight of Sn, 0.35 to 2.0% by weight of Ni and if necessary, 0.03 to 0.08% by weight of Cu, with the balance consisting of Fe and unavoidable impurities, wherein a tension coating is formed on the surface of a steel sheet and after the secondary recrystallization, the surface of the steel sheet is subjected to an artificial magnetic domain-controlling treatment in a direction substantially orthogonal to the rolling direction, and a process for the preparation of this steel sheet, are disclosed.

REFERENCES:
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patent: 3278348 (1966-10-01), Foster et al.
patent: 3940299 (1976-02-01), Goto et al.
patent: 4645547 (1987-02-01), Krause et al.
patent: 4753692 (1988-06-01), Kuroki et al.
patent: 4863531 (1989-09-01), Wada et al.
patent: 4863532 (1989-09-01), Kuroki et al.
Patents Abstracts of Japan, vol. 10, No. 56 (C-331) [2113] Mar. 26, 1986.
European Search Report EP 89 10 7068.

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