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A temperature transition method for hot-dip galvanized steel strip

A technology of hot-dip galvanizing and strip steel, applied in hot-dip galvanizing process, heat treatment process control, heat treatment furnace and other directions, it can solve the problems of quality loss, achieve qualified and stable performance, avoid flat pattern, rolling force and roll mode optimized effect

Active Publication Date: 2022-05-10
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the current hot-dip galvanizing technology, the direct transition of temperature is limited to the transition with a thickness transition less than 0.1mm and a temperature change less than 40°C. For transitions beyond this range, it is necessary to insert a transition coil or to shear the non-compliant part of the tape head, which will cause a certain amount of mass loss

Method used

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  • A temperature transition method for hot-dip galvanized steel strip
  • A temperature transition method for hot-dip galvanized steel strip
  • A temperature transition method for hot-dip galvanized steel strip

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Embodiment 1

[0055] Embodiment 1: see Figure 1-Figure 5 , a hot-dip galvanized steel strip temperature transition method, the method may further comprise the steps:

[0056] Step 1: Control of the entry section;

[0057] Step 2: Control of the cleaning section;

[0058] Step 3: Control of the furnace section;

[0059] Step 4: Control of the air knife;

[0060] Step 5: Control of leveling and straightening;

[0061] Step 6: Post-processing and coiling.

[0062] Among them, step 1: the control of the entry section, the details are as follows:

[0063] 1.1 The transition value of the thickness is limited within 0.3mm;

[0064] The switching of the thickness directly affects the change of the annealing temperature of the strip steel. When the thickness changes and the operating speed of the unit remains unchanged, the annealing temperature is inversely proportional to the change of the thickness. If the thickness exceeds 0.3mm, it will be difficult to adjust, mainly Due to the slow res...

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Abstract

The invention relates to a method for temperature transition of hot-dip galvanized strip steel. The method comprises the following steps: step 1: control of the inlet section; step 2: control of the cleaning section; step 3: control of the furnace section; step 4: air knife control; step 5: leveling and straightening control; step 6: post-processing and coiling. This technical solution can effectively stabilize the annealing temperature within a certain range during the specification switching process, and ensure qualified and stable performance of the strip steel before and after switching.

Description

technical field [0001] The invention relates to a transition method, in particular to a temperature transition method for hot-dip galvanized strip steel, and belongs to the technical field of cold-rolling hot-dip galvanizing control. Background technique [0002] In the production of hot-dip galvanized strip steel, the annealing temperature determines the physical properties of the strip steel (tensile, yield, etc.), and also affects the adhesion of the hot-dip galvanized zinc layer. In order to obtain certain stable physical properties and better Adhesion, it is necessary to ensure that the annealing temperature of the strip within a certain range. [0003] However, in the actual hot-dip galvanizing production, due to the various specifications of strip steel products and continuous production, process switching must exist. Switching changes in product thickness, width, temperature, etc. will cause changes in annealing temperature, resulting in product physical properties a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26C21D11/00C21D9/52C23C2/06C23C2/40
CPCC21D1/26C21D11/00C21D9/52C23C2/06C23C2/40
Inventor 何锐陈绍林
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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