Rolling reduction control method under large liquid core pressure
A control method and reduction technology, applied in the direction of rolling force/roll gap control, etc., to improve the quality of the slab, refine the internal structure, and achieve the effect of easy
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[0013] The liquid core large reduction rolling reduction control method of the present invention is as follows figure 1 As shown, a roller mill is set at the position where the cast slab is not completely solidified and the liquid core in the horizontal section of the continuous caster, and the maximum liquid core thickness at the rolling mill position accounts for the percentage of the thickness of the cast slab before rolling, that is, the liquid core rate is δ, and the liquid core rate is obtained δ and judge whether it is greater than 0, if the liquid core rate δ is greater than 0, the rolling mill reduction of the casting billet is greater than or equal to the minimum reduction ΔH min The liquid core is rolled under large reduction, where the minimum reduction amount ΔH min =max[H·(ε v +ε l +δ), μ·S].
[0014] In the above formula, H is the thickness of the slab before rolling, in mm; ε V Is the solidification shrinkage, in %; ε l Is the linear shrinkage rate, in %; δ is the...
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