Hot-rolled steel sheet for manufacturing non-oriented electrical steel sheet and manufacturing method thereof
A technology of hot-rolled steel sheets and electromagnetic steel sheets, which is applied in the manufacture of inductors/transformers/magnets, manufacturing tools, and the magnetism of inorganic materials, and can solve the problems of manufacturability and high material costs
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Embodiment 1
[0099] Molten steel obtained by blowing in a converter was cast after degassing treatment, and steel billets with the compositions shown in Table 1 were produced. Then, hot rolling was performed to a thickness of 2.0 mm under the conditions of the slab heating temperature, the final hot rolling finish temperature, and the hot rolling finish coiling temperature shown in Table 2 to obtain hot rolled steel sheets. Next, at 100% N 2 Hot-rolled sheets were annealed at 1000° C. for 30 seconds in an ambient environment, pickled by immersion in a 7% HCl solution at 80° C. for 60 seconds, and then cold-rolled to the thicknesses shown in Table 2. Then, at 20% H 2 -80%N 2 After final annealing at 1035°C for 10 seconds in ambient, coating treatment is performed.
[0100] From the obtained non-oriented electrical steel sheet, Epstein test pieces were cut out in the rolling direction and the direction perpendicular to the rolling direction, and the magnetic properties were measured (iron...
Embodiment 2
[0108] Molten steel obtained by blowing in a converter was cast after degassing treatment, and slabs having the compositions shown in Table 3 were produced. Then, hot rolling was performed to a thickness of 1.6 mm under the conditions of the slab heating temperature, final hot rolling finish temperature, and post hot rolling coiling temperature conditions shown in Table 4. Next, at 100% N 2 The hot-rolled sheet was annealed at 1000° C. for 30 seconds in an environment, pickled under conditions of 7% HCl, 80° C.×60 seconds dipping, and then cold-rolled to the sheet thickness shown in Table 4. Then, at 20% H 2 -80%N 2 The final annealing was carried out under the condition of 1000°C for 10 seconds in the environment, and the coating treatment was performed.
[0109] From the obtained non-oriented electrical steel sheet, Epstein test pieces were cut out in the rolling direction and the direction perpendicular to the rolling direction, and the magnetic properties were measured ...
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