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Method for modifying baking and hardening performance of aluminum alloy automobile board with low content of Cu

An aluminum alloy sheet and bake hardening technology, applied in the field of aluminum alloy heat treatment, can solve problems such as low strength, and achieve the effects of improved bake hardenability, promising application prospects, and significant economic and social effects.

Active Publication Date: 2008-04-30
CHINA ALUMINUM INT ENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for improving the baking hardening properties of low-Cu content aluminum alloy automotive panels, aiming to effectively solve the current low-Cu content 6022 aluminum alloy automotive panels with low strength after baking. , so that the material can meet the requirements of the impact resistance of automobile panels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After homogenization treatment, 6022 aluminum alloy ingots are hot-rolled and cold-rolled to a 1.0mm thin plate; the thin plate is subjected to 550℃×1h solution treatment and then water quenched. Within 1h, heat treatment at 60℃×5min in an oil bath furnace, and then Tensile test was performed after parking at room temperature for 1 month. The heat treatment of baking varnish that simulates 175℃×30min is carried out in an oil bath furnace.

Embodiment 2

[0018] After being homogenized, the 6022 aluminum alloy ingot is hot-rolled and cold-rolled to a 1.1mm sheet. The thin plate is water-quenched after solution treatment at 520℃×1h, heat-treated in an oil bath furnace at 100℃×30min within 1h, and then parked at room temperature for 1 month and then subjected to a tensile test. The heat treatment of baking varnish that simulates 175℃×30min is carried out in an oil bath furnace.

Embodiment 3

[0020] After being homogenized, the 6022 aluminum alloy ingot is hot-rolled and cold-rolled to a 1.0mm thin plate. The thin plate is water-quenched after solution treatment at 550℃×1h, heat-treated at 140℃×5min in an oil bath furnace within 1h, and then parked at room temperature for 1 month and then subjected to a tensile test. The heat treatment of baking varnish that simulates 175℃×30min is carried out in an oil bath furnace.

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Abstract

The invention provides a method for improving the baking and hardening performance of a low Cu content aluminum alloy vehicle plate material. After the 6022 aluminum alloy plate material is performed aluminum alloy and water quenching, the heat treatment is performed within one hour, the treatment temperature is 60 to 200 DEG C, and the treatment time is between 2 to 30 minutes. The baking and hardening performance is remarkably enhanced, the lower yielding strength and the higher plasticity before punching are advantageous to the punching and molding, the yielding strength after baking and hardening is larger than 200MPa, and the invention satisfies the request of impact resistance of a vehicle plate, and is suitable for the technology treatment of the aluminum alloy plate material used for a vehicle body.

Description

Technical field [0001] The invention specifically relates to a method for improving the bake hardening performance of a 6022 aluminum alloy automobile sheet with a low Cu content, and belongs to the technical field of aluminum alloy heat treatment. Background technique [0002] At present, energy, environmental protection, and safety are the three major issues facing the world's automotive industry. Automobile lightweighting is an effective way to reduce energy consumption, improve automobile fuel economy, and reduce environmental pollution. Aluminum alloy materials have a series of excellent characteristics such as high specific strength, corrosion resistance, good impact resistance, easy surface coloring, good processing and formability, and extremely high recycling and regeneration properties, making them the most ideal material for automobile lightweight. As the car body accounts for about 40% of the total car weight, aluminization of the car body has attracted much attention...

Claims

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Application Information

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