Method for manufacturing grain-oriented electromagnetic steel sheet
A technology of electromagnetic steel sheet and manufacturing method, which is applied in the direction of manufacturing tools, circuits, magnetic objects, etc., can solve the problems of rising manufacturing costs, difficulty in securing land, etc., and achieve the effects of good adhesion and good iron loss reduction effect.
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[0244] Next, the effect of one form of the present invention will be described in more detail using an example, but the conditions in the example are an example of conditions adopted to confirm the possibility and effect of the present invention, and the present invention is not limited to this one Condition example.
[0245] In the present invention, various conditions can be adopted as long as the object of the present invention is achieved without departing from the gist of the present invention.
experiment example 1
[0247]The raw material slabs with the compositions shown in Table 1 were soaked at 1150° C. for 60 minutes and then subjected to hot rolling to produce hot-rolled steel sheets with a thickness of 2.3 mm. Next, the hot-rolled steel sheet was held at 1120° C. for 200 seconds, cooled immediately, held at 900° C. for 120 seconds, and then quenched for hot-rolled sheet annealing. After the hot-rolled annealed sheet was annealed, the hot-rolled annealed sheet was subjected to cold rolling after pickling to obtain a cold-rolled steel sheet having a final thickness of 0.23 mm.
[0248] Table 1
[0249]
[0250] This cold-rolled steel sheet (hereinafter "steel sheet") was subjected to decarburization annealing at 850° C. for 180 seconds in an atmosphere of hydrogen:nitrogen ratio of 75%:25%. The steel sheet after decarburization annealing was subjected to nitriding annealing held at 750° C. for 30 seconds in a mixed atmosphere of hydrogen, nitrogen, and ammonia to adjust the nitrog...
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