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A kind of double-layer composite aluminum alloy for automobile body

A double-layer composite and automobile body technology, applied in the field of aluminum alloy materials, can solve the problems of complex aluminum alloy processing technology, harsh raw material requirements, orange peel effect, etc., and achieve high paint hardening response, good formability, excellent formability The effect of hardness

Inactive Publication Date: 2017-11-07
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the Mg content in the aluminum alloy can greatly improve the strength, formability and corrosion resistance of the alloy, but there are delayed yield and Luders lines, which are prone to the disadvantages of "orange peel effect".
However, the existing aluminum alloy processing technology that can meet the performance requirements of both the curling performance of the aluminum alloy sheet and the performance of the surface paint brushing line is complicated, and the raw material requirements are more stringent, and the cost is higher.

Method used

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  • A kind of double-layer composite aluminum alloy for automobile body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of double-layer composite aluminum alloy for automobile body, described double-layer composite aluminum alloy is made by the aluminum alloy plate A and aluminum alloy plate B through the following steps:

[0030] 1) Hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure;

[0031] 2) The double-layer composite structure plate obtained after step 1) is subjected to solution treatment, the solution treatment temperature is 540°C, and the holding time is 15 minutes;

[0032] 3) Carry out artificial aging treatment on the plate treated in step 2), the artificial aging treatment temperature is 80° C., and the time is 4 hours.

[0033] The weight percent of each chemical composition in the aluminum alloy plate A is: Si 1.0%, Cu 1.1%, Zn 0.3%, Mg 3.0%, Ce 0.22%, Fe 0.9%, and the balance is Al.

[0034] The weight percentages of the chemical components in the aluminum alloy plate B are: Si 2.7%, Cu 0.75%, Zn 0.3%,...

Embodiment 2

[0050] A kind of double-layer composite aluminum alloy for automobile body, described double-layer composite aluminum alloy is made by the aluminum alloy plate A and aluminum alloy plate B through the following steps:

[0051] 1) Hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure;

[0052] 2) Perform solid solution treatment on the plate after step 1), the solution treatment temperature is 520°C, and the holding time is 25 minutes;

[0053] 3) Carry out artificial aging treatment on the plate treated in step 2), the artificial aging treatment temperature is 70° C., and the time is 10 hours.

[0054] The weight percentages of the chemical components in the aluminum alloy plate A are: Si 0.5%, Cu 0.55%, Zn 0.2%, Mg 5.2%, Fe 0.75%, and the balance is Al.

[0055] The weight percentages of the chemical components in the aluminum alloy plate B are: Si 2.2%, Cu 0.55%, Zn 0.2%, Mg 0.4%, Ce 0.25%, Fe 0.8%, and the balance ...

Embodiment 3

[0071] A kind of double-layer composite aluminum alloy for automobile body, described double-layer composite aluminum alloy is made by the aluminum alloy plate A and aluminum alloy plate B through the following steps:

[0072] 1) Hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure;

[0073] 2) Perform solid solution treatment on the plate treated in step 1), the solution treatment temperature is 560°C, and the holding time is 20 minutes;

[0074] 3) Carry out artificial aging treatment on the plate treated in step 2), the temperature of artificial aging treatment is 100° C., and the time is 2 hours.

[0075] The weight percent of each chemical composition in the aluminum alloy plate A is: Si 1.5%, Cu 1.8%, Zn 0.53%, Mg 2.0%, Fe 1%, and the balance is Al.

[0076] The weight percentages of the chemical components in the aluminum alloy plate B are: Si 3.5%, Cu 1.5%, Zn 0.53%, Mg 0.4%, Ce 0.2%, Fe 0.9%, and the balance...

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Abstract

The invention belongs to a two-layer composite aluminum alloy for an automotive body. The two-layer composite aluminum alloy is formed by two layers of different aluminum alloys. According to the two-layer composite aluminum alloy for the automotive body provided by the invention, an A layer has excellent formability and hardness, and high intensity; a B layer has better shaping and higher paint-bake hardenability response; the two-layer composite aluminum alloy has high timber intensity and good formability, and meanwhile, the intensity of the B layer can be improved during an automobile painting baking processing process; and the two-layer composite aluminum alloy can be widely applied in the manufacturing field of automotive bodies and panels.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a double-layer composite aluminum alloy for automobile bodies. Background technique [0002] Due to its high strength, light weight, and good electrical conductivity, aluminum alloy is widely used in aerospace, automobile manufacturing and other technical fields and has become the most ideal material for automobile lightweight. Due to the formability, dent resistance, bake hardenability (after painting) and the resulting high mechanical strength of aluminum alloys in the vehicle's outer body panels, it is possible to manufacture thinner gauges and lighter weights with A Grade surface finish sheet. Increasing the Mg content in aluminum alloy can greatly improve the strength, formability and corrosion resistance of the alloy, but there are delayed yield and Luders lines, which are prone to the disadvantages of "orange peel effect". However, the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38C22C21/08C22C21/02C22F1/047C22F1/043B32B15/01B32B37/06B32B37/10B32B38/00
CPCB21B1/38B21B2001/386B32B15/016B32B37/06B32B37/10B32B38/0036B32B2307/536C22C21/02C22C21/08C22F1/043C22F1/047
Inventor 董彬彭俊张永学于沛杨仲磊
Owner HUANGHE S & T COLLEGE