Al-Mg-Si alloys for automobile body sheets and manufacturing method thereof

A technology for automobile body panels and manufacturing methods, applied in the fields of aluminum alloys and their manufacture, Al-Mg-Si series aluminum alloys for automobile body panels and their manufacturing fields, capable of solving the problems of high stamping performance and the inability to develop 6000 series aluminum alloys Hardening effect, no significant increase in strength, etc., to achieve good formability, good grill hardenability, and increased strength

Active Publication Date: 2010-11-10
ZHEJIANG GKO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing 6000-series aluminum alloy body panels are transported to the automobile factory for stamping after solid solution quenching in the material processing plant, and then baked and painted to make body components. During the transportation process, the aluminum alloy panels will undergo natural aging and reach T4 after two weeks. Its strength is relatively high, and its stamping performance is poor, and after stamping, its strength is not significantly improved after baking paint treatment, and it may even be lower than the T4 temper strength of the incoming material, which cannot exert the expected roast hardening effect of 6000 series aluminum alloys.

Method used

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  • Al-Mg-Si alloys for automobile body sheets and manufacturing method thereof
  • Al-Mg-Si alloys for automobile body sheets and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the mass percentage of Example 1 in Table 1, the ingredients were prepared to make aluminum ingots, master alloys AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20, and AlTi5B1 master alloys.

[0040] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted to about 80%, add AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20 master alloy; When the body temperature reaches 760°C, add Mg and Zn, add hexachloroethane to remove slag, and pass argon to remove gas. After degassing and slag removal, add the AlTi5B1 master alloy, let it stand for 20 minutes, cool down to 720°C and pour it into a cast iron mold.

[0041] The aluminum alloy ingot casted by casting above was subjected to homogenization annealing, head cutting and surface milling, the temperature of homogenization annealing was 540° C., and the holding time was 14 hours. Then the temperature is 430°C, the aluminum alloy ingot is hot-rolled to a 6.0mm thick aluminum all...

Embodiment 2

[0044] The batching was carried out according to the mass percentage of Example 2 in Table 1 to make aluminum ingots, master alloys AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20, and AlTi5B1 master alloys.

[0045] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted to about 80%, add AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20 master alloy; Body temperature to 750°C, add Mg and Zn, add hexachloroethane to remove slag, pass argon to remove gas, argon gas pressure is 0.1MPa, and ventilation time is 3-5 minutes. After degassing and slag removal, add the AlTi5B1 master alloy, let it stand for 30 minutes, cool down to 710°C and pour it into a cast iron mold.

[0046] The aluminum alloy ingots formed by casting were subjected to homogenization annealing, head cutting and face milling, the temperature of homogenization annealing was 550° C., and the holding time was 12 hours. Then the temperature is 450°C, the aluminum alloy ingot is ...

Embodiment 3

[0049] According to the mass percentage of Example 3 in Table 1, the ingredients were prepared to make aluminum ingots, master alloys AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20, and AlTi5B1 master alloys.

[0050] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted to about 80%, add AlSi15, AlCu50, AlMn10, AlCr5, AlZr5, AlFe20 master alloy; Body temperature to 780°C, add Mg and Zn, add hexachloroethane to remove slag, pass argon to remove gas, argon pressure is 0.05MPa, and ventilation time is 3-5 minutes. After degassing and slag removal, add the AlTi5B1 master alloy, let it stand for 30 minutes, cool down to 700°C and pour it into a cast iron mold.

[0051] The aluminum alloy ingot casted by casting above was subjected to homogenization annealing, head cutting and surface milling, the temperature of homogenization annealing was 530° C., and the holding time was 16 hours. Then the temperature is 430°C, the aluminum alloy ing...

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Abstract

The invention provides Al-Mg-Si alloys for automobile body sheets and a manufacturing method thereof, belonging to the technical field of alloy materials. The invention solves the following problems: the existing 6000 series alloys have poor stamping forming performance and the strength of the alloys is possibly reduced through paint baking after stamping. The alloys comprise the following components in percentage by weight: 0.75-1.5% of Si, 0.2-0.5% of Fe, 0.2-1.0% of Cu, 0.25-1.0% of Mn, 0.75-1.85% of Mg; 0.15-0.3% of Zn, 0.05-0.15% of Cr, 0.05-0.15% of Ti, 0.05-0.35% of Zr and the balance Al. The alloys have the advantages of low yield strength, convenient stamping, high plasticity and good impact resistance and baking hardenability.

Description

technical field [0001] The invention relates to an aluminum alloy and a manufacturing method thereof, in particular to an Al-Mg-Si series aluminum alloy for automobile body panels and a manufacturing method thereof, and belongs to the technical field of alloy materials. Background technique [0002] The world's auto industry is facing three increasingly severe issues: energy, environmental protection, and safety. Under the urgent situation that the world's industrial development requires energy saving and environmental protection, the world's major automobile manufacturers try to increase the proportion of lightweight materials used in automobiles to reduce the weight of automobiles, reduce energy consumption, reduce environmental pollution, and improve fuel economy of automobiles. Aluminum alloy can significantly reduce the weight of the car, which helps to improve the driving stability, ride comfort and safety of the car, and has excellent performance and high recyclabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/05
Inventor 丁荣辉黄文辉曲明洋曾凡清张超
Owner ZHEJIANG GKO IND CO LTD
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