Process for producing non-directional electric steel sheets free from ridging
AssigneeNippon Steel Corporation
InventorsYoshiaki Shimoyama, Kunisuke Miyoshi
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Abstract
Process for producing non-directional electric steel sheets free from ridging, comprising preparing slabs by continuous casting from molten steel comprising not more than 0.04% C, 1.5 to 4.0% Si, not more than 1.0% Al, the balance being Fe and unavoidable impurities, hot rolling, cold rolling and annealing the slabs, characterized in that the slab is subjected to breaking-down with a reduction rate between 10 to 70% in the sheet thickness direction at a temperature between 1000.degree. and 1300.degree. C, and subsequently the required treatments are done.
Claims3
In a process for producing non-directional electric steel sheets free from ridging comprising preparing slabs by continuous casting from molten steel containing not more than 0.04% C, 1.5 to 4.0% Si the balance being Fe and unavoidable impurities, hot rolling, cold rolling and annealing the slabs, the improvement which comprises subjecting the slabs to breaking-down with a reduction rate between 10 and 70% in the sheet thickness direction at a temperature between 1000.degree. - 1300.degree. C prior to the hot rolling.
Dependencies are inferred from the claim text.