PRIMARY RECRYSTALLIZATION ANNEALED SHEET FOR GRAIN ORIENTED SILICON STEEL SHEET

摘要

PROBLEM TO BE SOLVED: To stably obtain a grain oriented silicon steel sheet good in magnetic properties by allowing the texture in the vicinity of the surface layer of a steel sheet to have the maximum orientation within a specified angle from the specified orientation. ;SOLUTION: The texture in the vicinity of the surface layer of a steel sheet has the maximum orientation within 10° from the orientation of ϕ1=5°, Φ=20° and ϕ2=70° by the indication of the Euler angles of Bunge. For controlling such texture, preferably, the production is executed in accordance with the following producing conditions. A silicon steel slab contg., by weight, 0.005 to 0.08% C, 2.0 to 4.5% Si and 0.03 to 2.5% Mn and moreover contg. one or more kinds among 0.003 to 0.050% Al, 0.003 to 0.005% Se, 0.003 to 0.050% S, 0.001 to 0.3% Sb and 0.001 to 0.3% Sn is hot-rolled and is, if required, subjected to hot rolled sheet annealing. Then, it is subjected to cold rolling for one time or ≥ two times including process annealing to control its sheet thickness to the final one, and next, primary recrystallization annealing is executed.;COPYRIGHT: (C)2000,JPO