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Stainless steel rolling method of wide and heavy plate mill
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A technology of stainless steel and plate rolling mills, applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of low finishing rolling temperature, excessive time, consumption, etc., and achieve the goal of improving the shape of the head and tail and increasing the yield Effect
Inactive Publication Date: 2018-08-28
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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Problems solved by technology
The invention mainly solves the problem that the original rolling method consumes too much time and temperature, and makes up for the deficiency of the original method that the final rolling temperature is low
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Embodiment 1
[0026] The invention provides a method for rolling stainless steel in a wide and thick plate mill, comprising the following steps;
[0027] S1; Transmission of rolling process data: Before finishing rolling, the steel plate size and rolling method are transmitted from the production automationcontrol system to the process automationcontrol system. Calculate the thickness of the target steel plate, pre-calculate according to the capacity of the rolling mill, arrange the rolling passes, and the rolling mill model machine sends the value of the set speed system to the basic automatic controlsystem according to the calculation according to the thickness requirements;
[0028] S2; Rolling method selection: RS=1 rolling, cancel the forming stage rolling for all stainless steel production, directly carry out the widening stage rolling, related width correction: width ≤ 2500mm steel plate, width allowance plus 20mm, for width > 2500mm For steel plate, add 30mm to the width allowanc...
Embodiment 2
[0039] Steel grade: 316L, slab heating temperature 1175℃, blank size: 198X1530X2606mm, finished product size 55.67X2053X6907mm. RS=1 rolling method, artificial width addition of 20 mm, 5 passes of roughing mill (including 2 passes of widening), 2 passes of vertical roll, 5 passes of finishing mill, and the parameters are shown in Table 2.
[0040] Table 2: Parameter setting table
[0041]
[0042] The finishing rolling temperature is 966 ℃ to complete the rolling, and the unevenness of the overall steel plate is controlled at 1mm / m after straightening by the hot leveling machine.
Embodiment 3
[0044] Steel grade: 304, slab heating temperature 1164℃, blank size: 197X1530X3002mm, finished product size 30.52X2985X9932mm. RS=1 rolling method, artificial width addition of 30mm, 7 passes of roughing mill (including 4 passes of widening), 2 passes of vertical roll, and 5 passes of finishing mill. The parameters are shown in Table 3.
[0045] Table 3: Parameter setting table
[0046]
[0047] The finishing rolling temperature is 951℃ to complete the rolling, and the unevenness of the overall steel plate is controlled at 0.7mm / m after straightening by the hot leveling machine.
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Abstract
The invention relates to a rolling control technology of a heavy plate mill, in particular to a stainless steel rolling method of the wide and heavy plate mill. A rolling method for stainless steel RScomprises the steps of on the basis of considering a plate blank length through an original logic, adding the operation for judging stainless steel grades; if judging to be stainless steel, directlyadopting a rolling method with the RS being equal to 1, omitting the rolling operation in a forming stage, obtaining a convenient steel conveying condition, and directly rolling at a widening stage; and fully considering the difference of codes (the RS is equal to 1) and existed defects, and cooperatively using a vertical rolling method for reducing the uniformity in width of a steel plate, so that head and tail shapes of the steel plate are improved, and meanwhile, the yield of the steel plate can be improved.
Description
technical field [0001] The invention relates to a rolling control technology of a heavy plate rolling mill, in particular to a stainless steel rolling method for a wide and heavy plate rolling mill. Background technique [0002] The stainless steel rolling process of the existing wide and heavy plate rolling mill is generally divided into three stages, that is, the forming stage, the widening stage, and the finishing rolling stage. When rolling in the forming stage, the rough rolling mill uses a larger positive SKI value (warping head value) to control the warping head, so that the slab is flattened to facilitate rolling in the widening stage after steel transfer. In the rolling stage of the widening stage, the SKI value (warping head value) is used to control the warping head, so that the slab is flattened to facilitate the finishing rolling stage after the steel transfer. The principle of this method is to use the difference between the linear speeds of the upper and lowe...
Claims
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Application Information
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