A method for controlling the flow rate of tempering liquid during wet temper rolling of cold-rolled steel plate

Abstract

The invention discloses a method for controlling the tempering lubricant flow in a wet temper rolling process of a cold-rolled steel sheet. The method is mainly used for solving the technical problemthat in the prior art, a method for accurately controlling the surface roughness of a cold-rolled steel sheet through control over the tempering lubricant flow of a wet temper mill is unavailable. Themethod for controlling the tempering lubricant flow in the wet temper rolling process of the cold-rolled steel sheet comprises the steps that parameters are collected; the initial value of an objective function is set; the lubricant quantity WL, j of temper rolling deformation areas of a rack 1# and a rack 2# are calculated; the friction coefficient mui, j, corresponding to the parameters of thei strip steel in the current state, of the temper rolling deformation areas of the rack 1# and the rack 2# are calculated; the ductility epsilon1, i of the i strip steel on the rack 1# and theductility epsilon2, i of the i strip steel on the rack 2# in the current state are inversely calculated; and the total mill ductility epsiloni of the i strip steel in the current state is calculated. By adoption of the method for controlling the tempering lubricant flow in the wet temper rolling process of the cold-rolled steel sheet, accurate control over the surface toughness of the cold-rolled steel sheet is achieved, and the stability of the surface quality of the cold-rolled steel sheet is ensured.

Description

technical field [0001] The present invention relates to a wet-temper rolling method for cold-rolled steel plates, in particular to a method for controlling the flow rate of the leveling liquid in the process of wet-temper rolling of cold-rolled steel plates, in particular to a process for wet-temper rolling of a double-stand skin pass unit. The control method of leveling fluid flow. Background technique [0002] As one of the important characteristics of cold-rolled steel sheet, surface roughness not only affects the deformation behavior of cold-rolled steel sheet during stamping and the appearance after coating, but also can change the corrosion resistance of the material. When producing high value-added products such as automobile sheets, home appliance sheets, and tin-plated sheets, the surface roughness of cold-rolled steel sheets should be evenly distributed on the entire strip surface, and the surface roughness of some strips should not be too high and the surface roug...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for controlling the flow rate of the leveling liquid during the wet leveling rolling process of cold-rolled steel plates, which mainly solves the lack of accurate control of the surface roughness of cold-rolled steel plates by controlling the flow rate of the leveling liquid in the wet-leveling unit in the prior art To solve the technical problems of the steel strip, the surface roughness of the strip meets the requirements of the target roughness, and ensure the stability of the surface quality of the cold-rolled steel plate

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