Method for improving baking finish hardenability of AA6022 aluminum alloy sheet

A technology of aluminum alloy plate and paint hardening, which is applied in the field of aluminum alloy heat treatment, can solve the problems of low strength, achieve the effects of impact resistance, broad market prospect, and increase the stamping yield

Active Publication Date: 2009-04-15
CHINA ALUMINUM INT ENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for improving the hardening properties of AA6022 aluminum alloy automotive sheet paint, which aim

Method used

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  • Method for improving baking finish hardenability of AA6022 aluminum alloy sheet
  • Method for improving baking finish hardenability of AA6022 aluminum alloy sheet

Examples

Experimental program
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Effect test

Example Embodiment

[0016] Example 1

[0017] The alloy composition is 1.25% Si, 0.48% Mg, 0.02% Cu, 0.1% Mn, 0.12% Fe, 0.1% Cr, 0.25% Zn, 0.15% Ti, and the balance is AA6022 aluminum alloy ingot of Al. After the homogenization treatment at 480℃×8h+550℃×12h in the circulating air furnace, the sheet is cut and milled, hot-rolled and finally cold-rolled to 1mm; After parking for 10h, heat treatment at 75℃×8h in a circulating air furnace, and then for 1 month at room temperature, perform tensile and cupping tests, simulating 175℃×30min baking paint heat treatment is carried out in an oil bath furnace of.

Example Embodiment

[0018] Example 2

[0019] The alloy composition is 1.25% Si, 0.48% Mg, 0.02% Cu, 0.1% Mn, 0.12% Fe, 0.1% Cr, 0.25% Zn, 0.15% Ti, and the balance is AA6022 aluminum alloy ingot of Al. After the homogenization treatment at 480℃×8h+550℃×12h in the circulating air furnace, the sheet is cut and milled, hot-rolled and finally cold-rolled to 1mm; Immediately conduct heat treatment at 70°C x 30min in a circulating air furnace, and then perform tensile and cupping tests after parking at room temperature for 1 month, simulating 175°C x 30min baking paint heat treatment is performed in an oil bath furnace.

Example Embodiment

[0020] Example 3

[0021] The alloy composition is 1.25% Si, 0.48% Mg, 0.02% Cu, 0.1% Mn, 0.12% Fe, 0.1% Cr, 0.25% Zn, 0.15% Ti, and the balance is AA6022 aluminum alloy ingot of Al. After the homogenization treatment at 480℃×8h+550℃×12h in the circulating air furnace, the sheet is cut and milled, hot-rolled and finally cold-rolled to 1mm; After parking for 3 days, heat treatment at 100°C × 6h in a circulating air furnace, and then at room temperature for 1 month to perform tensile and cupping tests. The heating treatment of the paint simulating 175°C × 30min is carried out in an oil bath furnace. of.

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Abstract

The invention provides a method for improving the harden ability of baking paint of AA6022 aluminium alloy plates, which includes the following steps: after solid solution and water quenching, the AA6022 aluminium alloy plates are subjected to preheating treatment in a week with the preheating treatment temperature of 60 to 100 DEG C and preheating treatment time of 30 minutes to 12 hours. The preheat treatment process effectively improves the intensity of the alloy after the paint is baked and further develops the potential of age hardening of the aluminium alloy; simultaneously, the intensity of materials before stamping is lower, which is beneficial for stamping-forming and further causes automobile factories to broadly adopt the aluminium alloy plates to replace steel plates for producing body stamping parts of automobiles.

Description

technical field [0001] The invention relates to a preheating treatment process for improving the hardenability of baking paint of AA6022 aluminum alloy plate, belonging to the technical field of aluminum alloy heat treatment. Background technique [0002] Aluminum alloy materials have become the most ideal material for automobile lightweight due to their high specific strength, corrosion resistance, good impact resistance, easy surface coloring, good processing formability, and high recycling and regeneration properties. Since the 6xxx series aluminum alloys that can be strengthened by heat treatment have both good formability in the solid solution state (T4 state) and high strength in the paint state (T8 state), they are considered to be the most promising alloys for automobile body panels. [0003] In the production process of aluminum alloy automobile body panels, due to transportation and storage, the panels after solution treatment need to be placed at room temperature ...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 纪艳丽郭富安钟皓潘琰峰
Owner CHINA ALUMINUM INT ENG CORP
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