Alloying treatment device and alloying treatment method for hot-dip galvanized steel sheet

The alloying treatment apparatus and method address uneven alloying issues by using a heating zone, retention zone, and control unit to adjust heat based on retention zone temperature, ensuring consistent alloying and improved yield.

JP7743824B2Active Publication Date: 2025-09-25JFE STEEL CORP
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Patent Information

Application Number
JP2022154142
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-09-27
Publication Date
2025-09-25
Estimated Expiration
2042-09-27

AI Technical Summary

Technical Problem

Conventional methods for controlling alloying in hot-dip galvanized steel sheets suffer from time delays and temperature fluctuations, leading to uneven alloying due to feedback control mechanisms, which are sensitive to variations in heat input, steel plate size, and running speed.

Method used

An alloying treatment apparatus and method that includes a heating zone, retention zone, thermometer, and control unit to adjust heat amount based on retention zone temperature, using regression equations to correlate heat input with alloying conditions, ensuring consistent alloying across the steel sheet.

Benefits of technology

Reduces alloying unevenness and improves yield by maintaining consistent alloying quality through precise heat control, minimizing defects and reducing time required for adjustments.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide an apparatus and method for subjecting a hot-dip galvanized steel sheet to alloying, capable of reducing the occurrence of alloying unevenness.SOLUTION: An apparatus for subjecting a hot-dip galvanized steel sheet to alloying includes: a heating zone 41 for heating a hot-dip galvanized steel sheet being a steel sheet 6 subjected to hot-dip-galvanizing; a heat retaining zone 42 for heat-retaining the hot-dip galvanized steel sheet heated in the heating zone 41; a thermometer 44 for measuring a heat retaining zone temperature Tk being the temperature of the heat retaining zone 42; and a control part 45 for controlling the amount Q of heating of the heating zone 41 corresponding to the heat retaining zone temperature Tk.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

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    JP1989301155A

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