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A Prediction Method of Surface Roughness of Cold-rolled Strip Steel

A technology for surface roughness and cold-rolled strip steel, which is applied in metal rolling, metal rolling, length measuring devices, etc., can solve the problem that the surface roughness of cold-rolled strip steel cannot be accurately predicted online, so as to improve the prediction accuracy, Low cost and fast effect

Active Publication Date: 2020-02-21
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for predicting the surface roughness of cold-rolled strip steel, which mainly solves the technical problem that the existing cold-rolled strip surface roughness cannot be predicted accurately on-line

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  • A Prediction Method of Surface Roughness of Cold-rolled Strip Steel
  • A Prediction Method of Surface Roughness of Cold-rolled Strip Steel
  • A Prediction Method of Surface Roughness of Cold-rolled Strip Steel

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Embodiment Construction

[0048] The following specific examples are used to further illustrate the present invention. It should be understood that the following specific examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0049] Embodiment 1-4, the trade mark of cold-rolled steel strip is MRT4, and the mass percentage composition of its material composition is 0.06%C, 0.028%Si, 0.3%Mn, 0.1%P, 0.06%S, hardness is 58-64 ( HR30T), the thickness of the strip is 0.19mm; the strip is leveled by cold rolling, continuous annealing and double-stand wet leveling unit.

[0050] refer to figure 1 and figure 2 , the surface roughness Ra of the cold-rolled strip is calculated according to formula (1), and the coefficients in the model are first determined, including the following steps:

[0051] Determine the adjustment factor λ of the comprehensive unit equipment characteristic influence coefficient 1 , Comprehensive imprint rate influe...

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Abstract

The invention relates to a cold-rolled band steel surface roughness forecasting method. The technical problem that existing cold-rolled band steel surface roughness cannot be accurately forecasted online is mainly solved. The method comprises the step that the band steel surface roughness Ra is calculated according to the formula (1) which is as shown in the specification, wherein the determination method for the coefficients eta<1>, eta<2>, alpha<h>, alpha<h'>, alpha<k>, alpha<epsilon>, beta<h>, beta<k> and beta<epsilon> comprises the steps that the comprehensive unit equipment characteristic influence coefficient regulatory factor lambda1, the comprehensive impressing rate influence coefficient regulatory factor lambda2 and the comprehensive heritability influence coefficient regulatoryfactor lambda3 are determined at first, and then, the coefficients eta<1>, eta<2>, alpha<h>, alpha<h'>, alpha<k>, alpha<epsilon>, beta<h>, beta<k> and beta<epsilon> are determined. According to the method, the cold-rolled band steel surface roughness forecasting precision is high, the forecasting speed is high, and the using cost is low.

Description

technical field [0001] The invention relates to a method for predicting the surface roughness of cold-rolled steel strips, in particular to a method for predicting the surface roughness of continuously annealed cold-rolled steel strips treated by a double-stand wet-levelling unit, which belongs to the wet-levelling of cold-rolled steel plates The field of rolling technology. Background technique [0002] The surface roughness of cold-rolled strip steel is one of the important characteristics of cold-rolled steel sheet. It 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. In the production of high value-added products such as automobile sheets and home appliance sheets, the requirements for the surface quality of strip steel are very strict, so the research on surface quality has attracted more and more attention. The cold-rolled strip undergoes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00
CPCB21B38/00
Inventor 魏宝民王天顺董锐
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD