| 摘要 |
PURPOSE:To obtain extremely stably the titled grain oriented silicon steel by condensing Mo (compound) to a silicon steel slab surface layer having a specified component compsn., then heating, hot rolling, cold rolling, next applying primary recrystallization treatment and final finishing annealing to said material. CONSTITUTION:A silicon steel slab contg. by weight 0.01-0.06% C, 3.2-4.5% Si, 0.050-0.2% Mn, 0.008-0.1% Se, 0.003-0.1% Mo and 0.005-0.1% Sb is manufactured. Next, inorganic compound (e.g. CuMoO3, H2MoO3, etc.) contg. Mo is coated uniformly on the surface of the slab, said body is heated, then hot rolled to obtain the hot rolled plate having usually about 2-5mm. thickness. Next the hot rolled plate is homogenizing annealed then cold rolled >=2 times interposing intermediate annealing at 850-1,000 deg.C to the final product thickness (usually 0.3mm. thickness), then subjected to primary recrystallization annealing applied also as decarbonization, further subjected to the final finishing annealing. As the result, the grain oriented silicon steel sheet in which secondary recrystallized grain having {110}<001> orientation is developed is obtained. |
