Manufacture of anisotropic electrical steel plate with improved iron loss

Abstract

Abstract PURPOSE:To obtain industrially and stably a product with improved iron loss by subjecting a slab for an electrical steel plate contg. prescribed percentages of C, Si, Al, N, S, Mn and P to hot and mechanical working under prescribed conditions. CONSTITUTION:A slab consisting of 0.025-0.075% C, 3-4.5% Si, 0.01-0.06% acid-sol. Al, 0.003-0.013% N, <=0.007% S, 0.08-0.45% Mn, 0.015-0.045% P and the balance Fe is cast. The slab is heated to <=1,280 deg.C and hot rolled. The hot rolled plate is annealed at 850-1,200 deg.C for a short time and cold rolled at >=80% draft. The cold rolled plate having the final thickness is subjected to continuous decarburization annealing in wet hydrogen, it is coated with a protective coating material for annealing, and finish annealing is carried out at a high temp.

Inventors

• 👤 Yozo Suga
• 👤 菅　洋三
• 👤 Fumio Matsumoto
• 👤 文夫 松本
• 👤 Tadashi Nakayama
• 👤 正 中山

Bibliographic Details