MANUFACTURE OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING SMALL IRON LOSS

Title:

MANUFACTURE OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING SMALL IRON LOSS

Document Type and Number:

Japanese Patent JPS61159531

Kind Code:

A

Abstract:

PURPOSE: To manufacture a grain-oriented electrical steel sheet having a small iron loss by subjecting a silicon steel slab contg. specified percentages of C, Si, Mn, Cu, Se and S to hot rolling, cold rolling, decarburization annealing and finish annealing at a high temp.

CONSTITUTION: A silicon steel slab consisting of 0.02W0.12% C, 2.5W4.0% Si, 0.03W0.15% Mn, 0.04W0.19% Cu, ≥0.005% Se, 0.010W0.050% in total of Se and S and the balance Fe with inevitable impurities or further contg. 0.005W0.035% Sb is hot rolled and cold rolled twice or more while process annealing is carried out between the cold rolling stages. The resulting steel sheet is subjected to decarburization annealing, coating with a protective coating material for annealing, and finish annealing at a high temp.

Inventors:

NAKAJIMA SHOZABURO
NAKAYAMA HISANOBU
SHIMOYAMA YOSHIAKI
MORI YASUKAZU

Application Number:

JP28107184A

Publication Date:

July 19, 1986

Filing Date:

December 30, 1984

Export Citation:

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Assignee:

NIPPON STEEL CORP

International Classes:

C22C38/00; B21B3/00; C21D8/12; C22C38/16; H01F1/16; (IPC1-7): B21B3/00; C21D8/12; C22C38/16; H01F1/16

Attorney, Agent or Firm:

Kazuo Ozeki

Previous Patent: JPS61159530

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