Production method for reducing temperature drop of hot-rolled intermediate blank
A production method and temperature drop technology, applied in the direction of temperature control, etc., can solve problems such as high temperature of slab out of the furnace, increase of gas consumption, and prolongation of furnace time, so as to improve rolling stability, reduce rolling time, reduce The effect of edge temperature drop
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[0021] 1. The rough rolling area of the hot rolling line is composed of the fixed width mill, R1 and R2 rolling mills. Before the first and second passes of the R1 rolling mill, it is not judged whether the rolling of the R2 rolling mill is completed. The R1 rolling mill is used for rolling in advance. The time is 1 to 3 seconds, and the rolling speed of R1 and R2 is increased, and each pass is increased by 0.3 to 0.8 m / s on the basis of the rolling speed set by the original second-level digital model; (for example: the rolling speed of R1 three passes Respectively: 1.0 m / s, 1.44 m / s, 1.76 m / s, respectively increased to 1.5 m / s, 1.8 m / s, 2.0 m / s; R2 three-pass rolling speed: 2.7 m / s second, 3.2 m / s, 4.0 m / s, respectively increased to 3.3 m / s, 4.0 m / s, 4.5 m / s).
[0022] 2. The water pressure and water volume of the cooling water of the roll body in summer are controlled at 0.8-1.0MPa; the water pressure and volume of the cooling water of the roll body in winter are 0.6-0.8MP...
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