Six-series aluminum alloy sheet for outer plate of automotive body and preparation method thereof

A technology for aluminum alloy sheet and automobile body, which is applied in the field of aluminum alloy sheet for automobile body, can solve the problems of 6 series aluminum alloy sheet hemming performance and surface quality not meeting production requirements, affecting the large-scale popularization and application of automobile body outer plate, etc. , to achieve the effect of excellent hemming performance, smooth and delicate surface quality, and improved process route and parameters

Active Publication Date: 2020-07-24
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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Problems solved by technology

[0005] In view of this, in order to solve the problem that the hemming performance and surface quality of the 6-series aluminum alloy sheet prepared by the existing process cannot meet the production require

Method used

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  • Six-series aluminum alloy sheet for outer plate of automotive body and preparation method thereof
  • Six-series aluminum alloy sheet for outer plate of automotive body and preparation method thereof
  • Six-series aluminum alloy sheet for outer plate of automotive body and preparation method thereof

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Effect test

Embodiment

[0032] A method for preparing a 6-series aluminum alloy plate for an automobile body outer panel, comprising the steps of:

[0033] A. The aluminum alloy raw material for preparing the outer panel of the automobile body is batched according to the weight percentage, and the mass percentage ratio of each element of the aluminum alloy raw material is as follows:

[0034] element Si Fe Cu mn Mg Ti Impurities Al content 0.60 0.15 0.15 0.10 0.70 0.02 0.03 margin

[0035] Impurities contain alkali metals, Na≤10ppm in alkali metals, Ca≤8ppm, Li≤15ppm; aluminum alloy raw materials are recycled aluminum, industrial pure aluminum, industrial pure Mg, industrial pure Zn, master alloy Al-Si, master alloy Al- Cu, master alloy Al-Fe, master alloy Al-Mn. The prepared aluminum alloy raw material is melted into liquid aluminum alloy in a smelting furnace. The melting temperature of the aluminum alloy raw material is 700-760°C. During the melting proc...

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Abstract

The invention belongs to the field of aluminum alloy sheets for automotive bodies, and relates to a six-series aluminum alloy sheet for an outer plate of an automotive body and a preparation method thereof. The six-series aluminum alloy sheet is prepared from the following elemental constituents according to weight percentages: 0.55 to 0.65 % of Si, 0.10 to 0.20% of Fe, 0.10 to 0.20% of Cu, 0.05 to 0.15% of Mn, 0.65 to 0.75% of Mg, 0. 01 to 0.03% of Ti, less than or equal to 0.03% of single impurity, less than or equal to 0.10% of impurities in total, and the balance being Al. According to thepreparation method of the six-series aluminum alloy sheet, the rolling pass and working procedure time of hot rough rolling are strictly limited, and annealing is performed two times in the cold rolling process. Compared with a traditional 6016 alloy, the finished product has the advantages that the edge covering performance is significantly improved, the finished product has a smooth and fine surface without macroscopic Roping line defects after stamping, and the surface quality is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy sheets for automobile bodies, and relates to a 6-series aluminum alloy sheet for automobile body outer panels and a preparation method thereof, in particular to a 6-series aluminum alloy sheet with excellent hemming performance and high surface quality after stamping and its preparation method. Background technique [0002] With the continuous growth of the number of cars in various countries in the world, fuel consumption and exhaust pollution are increasing day by day. Automakers have to make reducing fuel consumption and limiting vehicle exhaust emissions one of the important goals of automobile development. Lightweight body is an effective way to achieve this goal. Therefore, in recent years, the application of aluminum alloy as a lightweight material on the body has become more and more popular. [0003] At present, most of the research focus of patents on the outer panel of automobil...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047C22F1/05B21C37/02
CPCB21C37/02C22C1/026C22C1/03C22C1/06C22C21/08C22F1/002C22F1/047C22F1/05
Inventor 崔立治王飞祖立成冉凡青张旭鹏王如川王哲
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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