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Tension Compensation Method Aiming at Reducing the Attenuation Effect of Furnace Roll Roughness in Continuous Annealing Process

A technology of roughness and surface roughness, which is applied in the field of metallurgical steel rolling, can solve the problems of increasing equipment maintenance costs and lack of treatment technology, and achieve the effects of small workload, improved production efficiency, and guaranteed performance of strip steel materials

Inactive Publication Date: 2019-05-28
唐山格诺金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, scholars at home and abroad have relatively little research on this issue, and lack of relevant treatment technology as a theoretical guide. The site often replaces the furnace rolls continuously to maintain the roughness requirements of the furnace rolls, so as to prevent the tension drop of the furnace section. Undoubtedly This greatly increases the maintenance cost of the equipment. In this way, how to correctly understand the attenuation of the surface roughness of the furnace roller and perform corresponding tension compensation has become the focus of on-site technical research.

Method used

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  • Tension Compensation Method Aiming at Reducing the Attenuation Effect of Furnace Roll Roughness in Continuous Annealing Process
  • Tension Compensation Method Aiming at Reducing the Attenuation Effect of Furnace Roll Roughness in Continuous Annealing Process
  • Tension Compensation Method Aiming at Reducing the Attenuation Effect of Furnace Roll Roughness in Continuous Annealing Process

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Effect test

Embodiment 1

[0047] Select the strip steel whose steel type is CQ and whose specification is 0.50mm×1500mm, taking the continuous annealing unit of a domestic factory as an example, as follows figure 1 The total calculation flow chart of the tension compensation method aimed at reducing the influence of the furnace roll roughness attenuation in the continuous annealing process shown:

[0048] First, in step a, collect the key equipment and process parameters of the unit, mainly including: the set tension T of the current process section in the furnace of the continuous annealing unit = 6.5MPa, the service mileage of the furnace roller L = 1100km, the original roughness of the furnace roller surface Ra r0 =5Ra, critical deviation factor ψ*=35, critical curvature index λ*=0.8;

[0049] Subsequently, if figure 2 As shown, in step b, the parameters of the strip steel are collected, mainly including: strip steel width B=1500mm, strip steel thickness h=0.5mm, strip steel Poisson’s ratio ν=0.3...

Embodiment 2

[0076] Select the strip steel whose steel type is CQ and whose specification is 0.40mm×1350mm, taking the continuous annealing unit of a domestic factory as an example:

[0077] First, collect the key equipment and process parameters of the unit in step a, mainly including: the set tension T of the current process section in the furnace of the continuous annealing unit = 7MPa, the service mileage of the furnace roll L = 1000km, the original roughness of the furnace roll surface Ra r0 =4.8Ra, critical deviation factor ψ*=35, critical curvature index λ*=0.8

[0078] Subsequently, in step b, the parameters of the strip steel are collected, mainly including: strip steel width B=1350mm, strip steel thickness h=0.4mm, strip steel Poisson's ratio ν=0.3, strip steel friction coefficient regression model coefficient α 0 =0.2, α 1 =0.15, α 2 =-0.0028, α 3 =0.00018, weighting coefficient A 1 =0.4;

[0079] Subsequently, in step c, relevant parameters are defined, mainly including: t...

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Abstract

The invention discloses a tension compensation method aiming at reducing influence of furnace roller roughness attenuation in a continuous annealing process. The method mainly comprises the following steps executed by a computer: 1, collecting a key device and technological parameters of a unit; 2, collecting parameters of strip steel; 3, defining related parameters; 4, establishing a mathematic model which reflects the relationship among a furnace roller current roughness Rar, a furnace roller original roughness Rar0 and a furnace roller service mileage L; 5, calculating a friction coefficient according to a regression model; 6, calculating an optimum set tension sample TLi when the furnace roller service mileage is Li' 7, establishing a mathematic model which reflects the relationship between a tension compensation value <delta>T and the furnace roller service mileage L; and 8, outputting the tension compensation value <delta>T. according to the method disclosed by the invention, the tension compensation for strip steel in the continuous annealing process is realized, so that the stable plate permeability of the strip steel is improved to the greatest extent under the condition that the furnace roller roughness attenuates continuously.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel rolling, in particular to a tension compensation method for reducing the attenuation of furnace roll roughness. Background technique [0002] Before finishing, cold-rolled strip steel needs to be annealed to eliminate work hardening, residual stress and improve mechanical properties. Continuous annealing can combine cleaning, annealing, smoothing, finishing and other processes into one due to the adoption of rapid heating, high temperature annealing, rapid cooling, overaging treatment and other technologies. It has high efficiency, short production cycle and is suitable for mass production. It has been widely used due to a series of advantages. In the cold rolling production process, the continuous annealing unit has gradually become an important part of the cold rolling production organization, and the equipment status of the furnace section directly affects the operation of the cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 白振华刘硕杨徐纪栓王云祥钱承王瑞
Owner 唐山格诺金属科技有限公司