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#5754 aluminium alloy base material for pillar trimming plate of car body and production method of #5754 aluminium alloy base material

A technology for a car body and a production method, which is applied in the field of aluminum alloy substrates, and can solve the problems of cracking, forming local orange peel, and large performance fluctuations.

Inactive Publication Date: 2018-06-08
CHINALCO SWA COLD ROLLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing 5754 aluminum alloy materials have the problems of large performance fluctuation, local orange peel and cracking in the forming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: In this embodiment, the 5754 aluminum alloy base material is used for the decorative plate of the car body column. The mass percentage of the chemical composition of the aluminum alloy base material is: Si is 0.20%, Fe is 0.20% or 0.30%, Cu is 0.05%, Mn is 0.20% or 0.30%, Mg is 2.60% or 3.00%, Cr is 0.30%, Zn is 0.05%, Ti is 0.01% or 0.03%, Na is 0.0004%, other impurities are 0.05% or 0.15%, and the rest The amount is Al.

Embodiment 2

[0017] Embodiment 2: In this embodiment, the 5754 aluminum alloy base material is used for the decorative plate of the car body column. The mass percentage of the chemical composition of the aluminum alloy base material is: Si is 0.20%, Fe is 0.24%, Cu is 0.05%, and Mn is 0.25% %, Mg is 2.73%, Cr is 0.30%, Zn is 0.05%, Ti is 0.01% or 0.03%, Na is 0.0004%, other impurities are 0.10%, and the rest is Al.

Embodiment 3

[0018] Embodiment 3: In this embodiment, the 5754 aluminum alloy base material is used for the decorative plate of the car body column. The mass percentage of the chemical composition of the aluminum alloy base material is: Si is 0.20%, Fe is 0.30%, Cu is 0.05%, and Mn is 0.25% %, Mg is 2.80%, Cr is 0.30%, Zn is 0.05%, Ti is 0.03%, Na is 0.0004%, other impurities are 0.05% or 0.15%, and the rest is Al.

[0019] Through the applicant's creative work, it was found that the strengthening effect of Mg on aluminum alloy is very obvious. For every 1% increase of Mg, the tensile strength will increase by about 34MPa; Mn can prevent the recrystallization process of aluminum alloy, increase the recrystallization temperature, and can significantly Refining recrystallized grains. In order to obtain proper structure, performance and reasonable heat treatment system, it is necessary to control the content of Mg and Mn. The invention optimizes the chemical composition ratio of the 5754 all...

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Abstract

The invention discloses a #5754 aluminium alloy base material for a pillar trimming plate of a car body. The #5754 aluminium alloy base material comprises the following chemical components in percentage by mass: 0.20% of Si, 0.20%-0.30% of Fe, 0.05% of Cu, 0.20%-0.30% of Mn, 2.60%-3.00% of Mg, 0.30% of Cr, 0.05% of Zn, 0.01%-0.03% of Ti, 0.0004% of Na, 0.05%-0.15% of other impurities, and the balance of Al. The invention further discloses a production method of the #5754 aluminium alloy base material for the pillar trimming plate of the car body. The preparation method comprises the followingtechnological processes: (1) material preparing; (2) casting; (3) bipolar homogenization of an ingot; (4) hot rolling; (5) cold rolling; (6) air cushion type continuous annealing of a finished product; (9) drawing, bending and straightening; and (10) cutting and packaging. The problems that a bent part of the #5754 aluminium alloy base material for a B pillar trimming plate and a C pillar trimmingplate of a car has an orange peel phenomenon and cold roll formed parts of the #5754 aluminium alloy base material for the B and C pillar trimming plates of the car are likely to crack are solved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy base materials, in particular to a 5754 aluminum alloy base material for a car body column trim and a production method thereof. Background technique [0002] The development of the automobile industry is currently facing energy conservation, environmental protection and safety issues. As an important method and approach for energy conservation and emission reduction in the automobile industry, automobile lightweight has been widely concerned. Aluminum alloy plays an important role in the lightweight of automobiles. Among them, 5754 aluminum alloy has the characteristics of medium strength, good corrosion resistance, weldability and easy processing and forming. It is a typical alloy in the Al-Mg series alloy. The 5754 aluminum alloy material is formed by cold bending. After spraying, the gloss contrast is strong, and it is compatible with the overall body of the car body. The B and C pilla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/02C22F1/047
CPCC22C21/08C22C1/026C22F1/047
Inventor 张仕强石华敏蔡辉刘钺
Owner CHINALCO SWA COLD ROLLING