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

A technology for automobile body panels and manufacturing methods, applied in the field of Al-Mg series aluminum alloys for automobile body panels and its manufacture, aluminum alloys and their manufacture, capable of solving unfavorable applications, strength and dent resistance of aluminum alloy automobile body panels Satisfying and affecting surface quality and other issues, achieving the effect of large-scale industrial production, good economic benefits, and improving corrosion resistance and plasticity

Active Publication Date: 2012-10-17
ZHEJIANG GKO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the 5754 series aluminum alloy belongs to non-heat-treatable strengthening alloy. If it is applied to automobile body panels, its strength is slightly insufficient and its impact resistance is poor. The strength and dent resistance of the existing 5754 aluminum alloys produced cannot meet the needs of automobile body panels. requirements
At the same time, the 5754 aluminum alloy usually produces a series of new steps or jagged deformation bands on the surface of the product during the deep drawing process, which seriously affects the surface quality, and the softening phenomenon after baking paint makes it unfavorable for the application as an aluminum alloy automobile body panel

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The batching was carried out according to the mass percentage of Example 1 in Table 1 to make aluminum ingots, master alloys AlCu50, AlMn10, AlCr4, AlZr4, Al-5Ti-B.

[0042] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted and the melt temperature is 750°C, add AlCu50, AlMn10, AlCr4, AlZr4 intermediate alloys and stir; when the melt temperature reaches 650°C, add Mg and Zn, beat Slag, refining; when the temperature is 700°C, add Al-5Ti-B master alloy, stir and stand for 30 minutes, and cast into a cast iron mold with a temperature of 700°C.

[0043] Homogenize the aluminum alloy ingots formed by casting above. The temperature of the homogenization treatment is 450°C, and the treatment time is 24 hours. The annealing time is 40min, and water quenching is used for rapid cooling after intermediate annealing. Cold rolling 2 times to form a thin plate.

[0044] Annealing the thin plate prepared above, the temperature of t...

Embodiment 2

[0046] The batching was carried out according to the mass percentage of Example 2 in Table 1 to make aluminum ingots, master alloys AlCu50, AlMn10, AlCr4, AlZr4, Al-5Ti-B.

[0047] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted and the melt temperature is 780°C, add AlCu50, AlMn10, AlCr4, AlBe3, AlZr4 master alloys and stir; when the melt temperature reaches 700°C, add Mg and Zn , slagging and refining; when the temperature is 710°C, add the Al-5Ti-B master alloy, stir and stand for 20 minutes, and pour into a cast iron mold with a temperature of 710°C.

[0048] Homogenize the casted aluminum alloy ingot above, the temperature of the homogenization treatment is 460°C, the treatment time is 20 hours, hot rolling at 460°C, intermediate annealing, the intermediate annealing temperature is 420°C, the intermediate The annealing time is 30 minutes, and the strong wind is used for rapid cooling after the intermediate annealing. C...

Embodiment 3

[0051] According to the mass percentage of Example 3 in Table 1, the ingredients were prepared to make aluminum ingots, master alloys AlCu50, AlMn10, AlCr4, AlZr4, Al-5Ti-B.

[0052] First put the aluminum ingot into the crucible resistance furnace, when the aluminum ingot is melted and the melt temperature is 780°C, add AlCu50, AlMn10, AlCr4, AlZr4 intermediate alloys and stir; when the melt temperature reaches 720°C, add Mg and Zn, beat Slag, refining; when the temperature is 720°C, add Al-5Ti-B master alloy, stir and stand for 20 minutes, and cast into a cast iron mold with a temperature of 720°C.

[0053] Homogenize the aluminum alloy ingots formed by casting above. The temperature of the homogenization treatment is 470°C, and the treatment time is 15 hours. The annealing time is 30min, and water quenching is used for rapid cooling after intermediate annealing. Cold rolling 2 times to form a thin plate.

[0054] Annealing is performed on the thin plate prepared above. Th...

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Abstract

The invention provides Al-Mg alloys for automobile body sheets and a manufacturing method thereof, belonging to the technical field of alloy materials. The invention solves the problem that the existing 5754 series alloys have poor strength and impact resistance. The alloys comprise the following components in percentage by weight: 0.001-0.25wt% of Cu, 0.05-0.35wt% of Mn, 2.5-3.5wt% of Mg; 0.005-0.25wt% of Cr, 0.008-0.8wt% of Zn, 0.01-0.15wt% of Ti, 0.001-0.2wt% of Zr, not more than 0.2wt% of Si, not more than 0.3wt% of Fe and the balance Al. The alloys have the advantages of good impact resistance and plasticity and strong feasibility, and the manufacturing method has the advantage of realizing the aims of energy conservation and emission reduction in the process of machining.

Description

technical field [0001] The invention relates to an aluminum alloy and a manufacturing method thereof, in particular to an Al-Mg 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. Reducing the weight of automobiles to reduce energy consumption, reduce environmental pollution, improve fuel economy of automobiles, and save limited resources have become the focus of major automobile factories. Aluminum alloy, as the preferred material for automobile lightweight, has excellent properties unmatched by other alloy materials. It is mainly reflected in a series of excellent characteristics such as high specific strength, good corrosion resistance, good impact resistance, easy surface coloring, good processing formability, and high recycling and regener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03C22F1/047
Inventor 丁荣辉曲明洋黄文辉曾凡清张超
Owner ZHEJIANG GKO IND CO LTD
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