Preparation method of Al-Mg alloy board for autobody

A technology of automobile body and alloy plate, applied in the field of alloy, can solve problems such as deterioration of plate surface quality
CN103320729BActive Publication Date: 2015-07-22ZHEJIANG GKO IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG GKO IND CO LTD
Publication Date
2015-07-22

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Abstract

The invention provides a preparation method of an Al-Mg alloy board for an autobody, comprising the following steps: a) providing an Al-Mg alloy board which has undergone cold rolling, wherein cold rolling deformation is less than 70%; b) heating the Al-Mg alloy board which has undergone cold rolling to 480-550 DEG C, carrying out thermal insulation within 5 min, and continuously annealing, wherein the heating speed is not less than 5 DEG C / s; c) cooling the Al-Mg alloy board which has undergone continuous annealing to less than 150 DEG C, wherein the cooling speed is not less than 10 DEG C / s; d) carrying out leveling processing on the cooled Al-Mg alloy board; and e) carrying out heat treatment on the Al-Mg alloy board which has undergone leveling processing. According to the invention, a cold-rolled sheet with the cold rolling deformation being not less than 70% is used as a raw material and undergoes high-temperature short-time annealing, rapid cooling and heat treatment. Thus, forming property of the Al-Mg alloy is raised, and generation of A-type flow lines is avoided during the forming process.
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Description

technical field

[0001] The invention relates to the technical field of alloys, in particular to a method for preparing an Al-Mg alloy plate for automobile bodies. Background technique

[0002] The world's auto industry is facing three increasingly severe issues: energy, environmental protection, and safety. Reducing the weight of automobiles, reducing energy consumption, reducing environmental pollution, improving fuel economy of automobiles, and saving limited resources have become the focus of major automobile factories.

[0003] Aluminum alloy has 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 regeneration, making it an excellent choice for lightweight automobiles. The preferred material, with excellent properties unmatched by other alloys.

[0004] Since the car body accounts for about 30% of the total vehicle weight, alum...

Claims

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