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A method for leveling cross-bending defects on the surface of hot-rolled pickled sheet

A hot-rolled pickling and leveling technology, applied in the direction of contour control, etc., can solve the problems of high secondary leveling rate, time-consuming and labor-intensive problems of strip cross-bending defects, and achieve the elimination of cross-bending defects on the strip surface, improving the leveling efficiency, The effect of simplifying the operation process

Active Publication Date: 2018-01-12
BEIJING SHOUGANG CO LTD
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Problems solved by technology

[0005] The invention provides a method for leveling the transverse fold defect on the surface of a hot-rolled pickled plate, which solves the technical problems of high secondary leveling rate and time-consuming and labor-intensive technical problems in the prior art, and achieves the improvement of the leveling of the transverse fold defect Efficiency, the technical effect of simplifying the operation process

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  • A method for leveling cross-bending defects on the surface of hot-rolled pickled sheet

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Embodiment Construction

[0022] The embodiments of the present application provide a smoothing method for cross-fold defects on the surface of hot-rolled pickled sheets, so as to solve the technical problems of complex correction of cross-fold defects in the prior art, low efficiency, and high secondary smoothing rate; The leveling efficiency of defects, the technical effect of reducing costs.

[0023] In order to solve the above technical problems, the general idea of ​​the technical solution provided by the embodiment of the present application is as follows:

[0024] A method for smoothing the surface of a hot-rolled pickled sheet for cross-bending defects, comprising:

[0025] The hot-rolling skin pass unit is controlled by constant rolling force, and the skin pass + straightening mode is selected;

[0026] The segmented pressure control strategy of deep bending rolls is adopted, and the pressure of deep bending rolls is adjusted according to the cross-sectional area of ​​the strip;

[0027] Con...

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Abstract

The invention belongs to the technical field of steel making and discloses a leveling method for cross break defects on the surface of a hot-rolled and acid-pickled plate. The leveling method comprises the steps that constant-rolling-force control is adopted by a hot-roll leveling unit, and a leveling and straightening mode is selected; a strategy of segmented pressure control over a deep bending roller is adopted, and the pressure of the deep bending roller is adjusted according to the cross sectional area of strip steel; and the elongation of the strip steel is controlled to be 3%-3.5%. By the adoption of the leveling method for the cross break defects on the surface of the hot-rolled and acid-pickled plate, the cross break defects are effectively eliminated; meanwhile, leveling operation is simplified, the probability of secondary leveling is lowered, and thus the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a method for leveling cross-bending defects on the surface of a hot-rolled pickled plate. Background technique [0002] During the uncoiling process of hot-rolled pickled sheets, obvious cross-bending defects are prone to appear on the surface of the strip, especially for low-grade hot-rolled pickled sheets. The basic characteristics of cross-bending defects are: strip-shaped creases perpendicular to the rolling direction, which even run through the entire width of the plate in severe cases, and have obvious concave-convex feeling when touched by hand. This quality problem has seriously affected customers' use, and has become the key to restricting the development of hot-rolled pickled sheets to high-precision. [0003] The reason for cross-bending defects in low-grade hot-rolled pickled sheets when uncoiling is that the low-grade hot-rolled pickled sheets generally have a y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
CPCB21B37/28
Inventor 王凤美路统宪周剑飞张兴光李金保李彬王学强
Owner BEIJING SHOUGANG CO LTD
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