Aluminium alloy with high forming property for automobile body plate

A technology of automobile body panels and formability, which is applied in the field of aluminum alloys, can solve the problems of reduced material formability, low bake hardenability, and reduced material corrosion resistance, and achieve the effect of improving formability

Active Publication Date: 2012-03-28
CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AA6111 alloy has good bake hardenability, but its yield strength before stamping is high, usually exceeding 150MPa or even higher, resulting in a decrease in the formability of the material and poor flanging ductility, and it is difficult to fully meet the formability requirements of automobile body panels. At the same time, the Cu content of the alloy is high, which reduces the corrosion resistance of the material.
AA6016 and AA6022 alloys are alloys with low Cu content and have good formability, but their bake hardenability is lower than that of AA6111 alloy.

Method used

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  • Aluminium alloy with high forming property for automobile body plate
  • Aluminium alloy with high forming property for automobile body plate

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Experimental program
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Effect test

Embodiment 1

[0022] A high formability aluminum alloy for automobile body panels, its chemical composition and mass percentage content are: Si 1.20wt%, Mg 0.35wt%, Mn 0.20wt%, Fe 0.15wt%, Cu 0.01wt%, Ti 0.15wt% %, Cr 0.10wt%, Zn 0.25wt%, and the balance is Al.

Embodiment 2

[0024] A high-formability aluminum alloy for automobile body panels, its chemical composition and mass percentage content are: Si 0.50wt%, Mg 0.70wt%, Mn 0.05wt%, Fe 0.05wt%, Cu 0.20wt%, Ti 0.15wt% %, Cr 0.10wt%, Zn 0.01wt%, and the balance is Al.

Embodiment 3

[0026] A high-formability aluminum alloy for automobile body panels, its chemical composition and mass percentage content are: Si 0.50wt%, Mg 0.50wt%, Mn 0.05wt%, Fe 0.05wt%, Cu 0.20wt%, Ti 0.15wt% %, Cr 0.10wt%, Zn 0.15wt.%, and the balance is Al.

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Abstract

The invention discloses an aluminium alloy with high forming property for an automobile body plate, comprising the following chemical constituents in percentage by weight: 0.50-1.20wt% of Si, 0.35-0.70wt% of Mg, 0.01-0.20wt% of Cu, 0.05-0.20wt% of Mn, less than or equal to 0.10wt% of Cr, 0.01-0.25wt% of Zn, less than or equal to 0.15wt% of Ti, 0.05-0.15wt% of Fe and the balance of Al. The aluminium alloy material of the invention has lower yield strength before baking finish, which is favourable for stamping shaping; and after baking finish, the yield strength is improved. The material has higher forming property and simultaneously satisfies the requirements of the impact resistance of the automobile body plate.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and relates to a 6xxx series aluminum alloy, in particular to a highly formable 6xxx series aluminum alloy for automobile body panels. Background technique [0002] Energy, environmental protection, and safety are the problems faced by the automotive industry in the world today. Automobile lightweight is an effective way to reduce energy consumption, improve automobile fuel economy, and reduce environmental pollution. Due to its high specific strength, corrosion resistance, low density, good impact resistance, easy surface coloring, good processing formability, and a series of excellent characteristics such as high recycling and regeneration, aluminum alloy materials have become the first choice for lightweight vehicles. Ideal material. With the continuous advancement of automobile lightweight, the 6xxx series aluminum alloys that are considered to be the most promising for automobile bod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02
Inventor 纪艳丽钟皓胡平郭富安
Owner CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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