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Aluminum alloy section for automobile bumper as well as preparation method of aluminum alloy section

A technology of aluminum alloy profiles and automobile bumpers, which is applied in the field of aluminum alloy profiles for automobile bumpers and its preparation, can solve the problems of performance not meeting the requirements of use, immature production technology, low production efficiency, etc., and achieve excellent corrosion resistance and welding performance, reduce the weight of the vehicle body, and save production costs

Active Publication Date: 2015-03-11
南通佳坤新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of making automobile bumpers with aluminum alloy materials is not yet mature enough, and there are still problems such as high cost, low production efficiency, and performance that cannot meet the requirements for use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing an aluminum alloy profile for an automobile bumper, comprising the steps of:

[0019] (1) Melting: Zn: 6.0%, Mg: 0.9%, Mn: 0.2%, Cu: 0.1%, Cr: 0.1%, Ti: 0.2% by mass percentage, and the rest is the ratio of Al and unavoidable impurity elements Put into the melting furnace, Cu, Cr, Mn, Ti elements are added in the form of master alloy, Mg and Zn elements are added in the form of pure metal, the adding order is master alloy, pure Zn, pure Mg, at 730℃-750℃ For smelting, keep the temperature until all the materials are melted to obtain an aluminum alloy solution. During the smelting process, the proportion of each alloy component is strictly controlled. The mass percentage content of impurity Fe is controlled at <0.15%, and the mass percentage content of other impurities is controlled below 0.1%;

[0020] (2) Refining: Pour the molten aluminum alloy obtained in step (1) into a static furnace at 730°C, use the method of blowing in argon gas and refinin...

Embodiment 2

[0025] A method for preparing an aluminum alloy profile for an automobile bumper, comprising the steps of:

[0026] (1) Smelting: Zn: 6.3%, Mg: 0.8%, Mn: 0.25%, Cu: 0.12%, Cr: 0.12%, Ti: 0.2% by mass percentage, and the rest is the ratio of Al and unavoidable impurity elements Put into the smelting furnace, Cu, Mn, Cr, Ti elements are added in the form of master alloy, Mg and Zn elements are added in the form of pure metal, the adding order is master alloy, pure Zn, pure Mg, at 730℃-750℃ For smelting, keep the temperature until all the materials are melted to obtain an aluminum alloy solution. During the smelting process, the proportion of each alloy component is strictly controlled. The mass percentage content of impurity Fe is controlled at <0.15%, and the mass percentage content of other impurities is controlled below 0.1%;

[0027] (2) Refining: Pour the molten aluminum alloy obtained in step (1) into a standing furnace at 740°C, use the method of blowing in argon gas and ...

Embodiment 3

[0032] A method for preparing an aluminum alloy profile for an automobile bumper, comprising the steps of:

[0033](1) Smelting: Zn: 6.2%, Mg: 1.0%, Mn: 0.2%, Cu: 0.15%, Cr: 0.2%, Ti: 0.25% by mass percentage, and the rest is the ratio of Al and unavoidable impurity elements Put into the smelting furnace, Cu, Mn, Cr, Ti elements are added in the form of master alloy, Mg and Zn elements are added in the form of pure metal, the adding order is master alloy, pure Zn, pure Mg, at 730℃-750℃ For smelting, keep the temperature until all the materials are melted to obtain an aluminum alloy solution. During the smelting process, the proportion of each alloy component is strictly controlled. The mass percentage of Fe is controlled at <0.15%, and the mass percentage of other impurities is controlled below 0.1%;

[0034] (2) Refining: Pour the molten aluminum alloy obtained in step (1) into a standing furnace at 740°C, use the method of blowing in argon gas and refining agent to carry out...

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Abstract

The invention discloses an aluminum alloy section for an automobile bumper. The aluminum alloy section comprises the following elements in percentage by mass: 6.0-6.5% of Zn, 0.8-1.0% of Mg, 0.2-0.3% of Mn, 0.1-0.2% of Cu, 0.2-0.3% of Ti and the balance of Al and inevitable impure elements; a preparation method of the aluminum alloy section comprises the following steps: (1) smelting, (2) refining, (3) casting, (4) homogenizing and extruding, and (5) quenching and aging, so as to obtain an aluminum alloy section finished product. The aluminum alloy section prepared by the invention is good in thermal deformation and machinability and excellent in corrosion resistance and welding property, and the produced automobile bumper is light in weight and can better absorb collision impact energy; the aluminum alloy section achieves various technical indexes of the automobile bumper speculated by the nation in performance, and further meets the development tendency of light weight of modern automobiles.

Description

technical field [0001] The invention relates to a method for preparing an aluminum alloy profile, in particular to an aluminum alloy profile for an automobile bumper and a preparation method thereof. Background technique [0002] At present, with the rapid development of the automobile industry, people have higher and higher requirements for the safety of automobiles. The car bumper is a safety device installed at the front and rear of the car. It is the first contact part during a collision. It has the functions of absorbing and easing external impact, reducing the damage to pedestrians in collision accidents, and reducing the damage to vehicles in low-speed collision accidents. . It is generally a thin-walled structural part with large surface area and complex shape, which requires high impact resistance. Now commonly used automobile bumpers are made of steel or stainless steel. Due to their heavy weight, they directly increase the quality of the vehicle and increase the...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 周海涛唐继勇
Owner 南通佳坤新材料科技有限公司
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