Grain-oriented electrical steel sheet and manufacturing method thereof
A technology of electromagnetic steel sheet and manufacturing method, applied in the direction of inductor/transformer/magnet manufacturing, manufacturing tools, circuits, etc., can solve the problems of deterioration, high cost, inability to maximize the use of the good characteristics of the product board, and achieve good iron loss The effect of characteristic and structural factor reduction
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Embodiment 1
[0152] Continuous casting was used to manufacture a steel slab whose composition contained the ingredients shown in Table 7 and the remainder was substantially Fe. After heating to 1420°C, it was hot-rolled to form a hot-rolled sheet with a thickness of 1.8mm, and then heated at 1000°C. Annealing of the hot-rolled sheet was performed for 100 seconds. Then, use cold rolling to make the middle plate thickness: 0.45mm, according to the oxidation degree PH 2 O / PH 2 =0.40, temperature: 1000° C., and time: 70 seconds were used for intermediate annealing. Thereafter, the inner layer scale (subscale) on the surface was removed by pickling with hydrochloric acid, and cold rolling was performed again to obtain a cold-rolled sheet having a thickness of 0.23 mm.
[0153] Next, perform decarburization annealing at a soaking temperature of 830°C for 300 seconds, then apply an annealing separator mainly composed of MgO, and perform secondary recrystallization at 1200°C for 30 hours. Final...
Embodiment 2
[0164] Continuous casting was used to manufacture a slab whose composition contained the ingredients shown in Table 9 and the remainder was substantially Fe. After heating to 1400° C., it was hot-rolled to produce a hot-rolled sheet with a thickness of 2.6 mm, and then rolled at 950 °C for 10 seconds of hot-rolled sheet annealing. Then, use cold rolling to make the middle plate thickness: 0.80mm, according to the oxidation degree PH 2 O / PH 2 =0.35, temperature: 1070° C., and time: 200 seconds were used for intermediate annealing. Thereafter, the inner layer scale on the surface was removed by pickling with hydrochloric acid, and cold rolling was performed again to obtain a cold-rolled sheet having a thickness of 0.20 mm.
[0165] Next, perform decarburization annealing at a soaking temperature of 860°C for 30 seconds, then apply an annealing separator mainly composed of MgO, and perform secondary recrystallization of magnesium at 1150°C for 10 hours. Final finish annealing ...
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