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Line speed dependent control of a furnace for heat treating aluminum alloy sheet

a technology of heat treatment furnace and aluminum alloy, which is applied in the direction of furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of inconform product characteristics, inability to meet the requirements of product quality, etc., and achieve consistent good mechanical properties.

Pending Publication Date: 2022-06-09
ALVANCE ALUMINIUM DUFFEL BV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention reduces convection heating of the advancing sheet by reducing the fan speed and furnace air temperature in the zone where peak metal temperature is initially achieved. This results in a longer soak time for the sheet, as it moves slower and stays in the same temperature zone for a longer period of time.

Problems solved by technology

The temperature-time profile of sheet can greatly affect the resulting strength and ductility of the final sheet product.
In a continuous annealing line as well as a continuous solution heat treating line deviation of nominal line speed leads to process conditions in the heat treatment furnace and quench that might lead to non-conforming product characteristics.
However, this first buffer resource is finite.
However, this second buffer resource is finite.
Once the accumulator is empty (entrance) or full (exit) process section stoppage is unavoidable.
Reducing line speed can harm the sheet product properties because the target PMT and time duration of the target PMT in the furnace are not maintained.

Method used

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  • Line speed dependent control of a furnace for heat treating aluminum alloy sheet
  • Line speed dependent control of a furnace for heat treating aluminum alloy sheet
  • Line speed dependent control of a furnace for heat treating aluminum alloy sheet

Examples

Experimental program
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Effect test

example 1

[0175]FIG. 6 shows a chart illustrating the control of peak metal temperature (PMT) and line speed according to the present invention. This shows as aluminum alloy sheet material went through a speed reduction from 50 to 35 m / min PMT (° C.) in a furnace the peak metal temperature varied an average+ / −1° C. The fan speed and air temperature were adjusted according to the invention.

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PUM

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Abstract

A method for controlling continuous heat treating and annealing of heat-treatable and non-heat-treatable aluminum alloy sheet at final thickness continuously moving in a floating state horizontally through a continuous convection floating furnace arranged to heat the moving aluminum sheet to a set peak metal temperature. The controlling including controlling fan speeds and furnace air temperature to accommodate variations in line speed of the aluminum alloy sheet continuously moving in the floating state horizontally through the continuous convection floating furnace

Description

FIELD OF THE INVENTION[0001]The invention relates to a method for controlling continuous heat-treating and annealing of aluminum alloy sheet at final thickness continuously moving in a floating state substantially horizontally through a continuous convection floating furnace arranged to heat the moving aluminum sheet to a set peak metal temperature (TPMT). The controlling including controlling fan speeds and furnace air temperature to accommodate variations in line speed of the aluminum alloy sheet continuously moving in the floating state horizontally through the continuous convection floating furnace.BACKGROUND TO THE INVENTION[0002]As will be appreciated herein below, except as otherwise indicated, aluminum alloy designations and temper designations refer to the Aluminum Association designations in Aluminum Standards and Data and the Teal Sheets Registration Record Series as published by the Aluminum Association in 2018 and frequently updated, and well known to the persons skille...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22F1/053C21D1/26C21D11/00C21D9/46
CPCC22F1/053C21D9/46C21D11/00C21D1/26C22F1/04C22F1/002C22F1/047
Inventor ARRAS, JOHAN PETRUS MARIETTE GUIDOLODZIK, JASON P.HARRIS, JAMAAL D.ELWELL, CHRISTOPHER
Owner ALVANCE ALUMINIUM DUFFEL BV