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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 fields of aluminum alloys and their manufacture, Al-Mg series aluminum alloys for automobile body panels and their manufacturing fields, 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: 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

[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 produce 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℃, add AlCu50, AlMn10, AlCr4, AlZr4 intermediate alloy and stir; when the melt temperature reaches 650℃, add Mg and Zn, Slag and refining; when the temperature is at 700°C, add Al-5Ti-B master alloy, stir and stand for 30 minutes, and cast into a cast iron mold at a temperature of 700°C.

[0043] Homogenize the above cast aluminum alloy ingot, the temperature of the homogenization treatment is 450℃, the treatment time is 24 hours, the temperature is 450℃, the temperature is hot rolled, the intermediate annealing, the temperature of the intermediate annealing is 400℃, The annealing time is 40min, and water quenching is used for rapid cooling after intermediate annealing. ...

Embodiment 2

[0046] The batching was carried out according to the mass percentage of Example 2 in Table 1 to produce 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 melts and the melt temperature is 780℃, add AlCu50, AlMn10, AlCr4, AlBe3, AlZr4 intermediate alloy and stir; when the melt temperature reaches 700℃, add Mg and Zn , Slagging and refining; when the temperature is at 710℃, add Al-5Ti-B master alloy, stir and stand for 20 minutes, and cast in a cast iron mold at a temperature of 710℃.

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

Embodiment 3

[0051] The batching was carried out according to the mass percentage of Example 3 in Table 1 to produce 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℃, add AlCu50, AlMn10, AlCr4, AlZr4 intermediate alloy and stir; when the melt temperature reaches 720℃, add Mg and Zn, Slag and refining; when the temperature is at 720°C, add Al-5Ti-B master alloy, stir and stand for 20 minutes, and cast in a cast iron mold at a temperature of 720°C.

[0053] Homogenize the above cast aluminum alloy ingots. The temperature of the homogenization treatment is 470°C, the treatment time is 15 hours, and the temperature is 470°C. The temperature is hot rolled and intermediate annealing. The intermediate annealing temperature is 400°C. The annealing time is 30 minutes, and water quenching is used for rapid cooling after intermediate annealing...

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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 automobile 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 automobile fuel economy, and save limited resources has become the focus of attention of major automobile manufacturers. Aluminum alloy, as the first choice material for automobile lightweight, has excellent performance that other alloy materials can't match. Mainly reflected in a series of excellent characteristics such as high specific strength, good corrosion resistance, good impact resistance, easy surface coloring, good processing and formability, and high recy...

Claims

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Application Information

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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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