A kind of rare earth modified aluminum alloy automobile body plate and preparation method thereof

An automobile body and rare earth modification technology, which is applied in the field of automobile lightweight, can solve the problems of poor alloy forming performance, and achieve the effects of excellent formability, improved forming quality and good surface gloss.

Active Publication Date: 2020-01-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the above-mentioned alloys still have the problem of poor formability by adopting the existing automobile body panel forming technology, and their mechanical performance indicators such as static tensile elongation still cannot meet the requirements of practical applications.
At present, there is no literature report on the use of cerium and ytterbium composite alloying technology to improve the formability and mechanical properties of aluminum-magnesium-silicon alloys

Method used

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  • A kind of rare earth modified aluminum alloy automobile body plate and preparation method thereof
  • A kind of rare earth modified aluminum alloy automobile body plate and preparation method thereof
  • A kind of rare earth modified aluminum alloy automobile body plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a rare earth modified aluminum alloy automobile body plate, comprising the following steps:

[0022] 1. Ingredients: According to the mass percentage of each element in the finished aluminum alloy plate for automobile body, Si: 1.40%, Mg: 0.5%, Fe: 0.40%, Cu: 0.15%, Mn: 0.12%, Cr: 0.08%; Ti: 0.12%, V: 0.70%, Bi: 0.03%, Zr: 0.30%, Be: 1.0%, Co: 0.40%, Ca: 0.30%, Ce+Yb≤0.80% (see Table 1 for specific implementation), Zn: The proportion of 0.10% and the balance being Al weighs pure aluminum ingots, pure magnesium ingots and aluminum-based master alloys corresponding to other elements involved in the above components;

[0023] 2. Melting: (1) Add the pure aluminum ingots and aluminum-based master alloys (except aluminum cerium master alloy, aluminum ytterbium master alloy and aluminum beryllium master alloy) weighed in step 1 into the melting furnace at a melting temperature of 780°C. When the melt temperature reaches 760°C, add aluminum-cerium mast...

Embodiment 2

[0039] The difference between this example and Example 1 is that the composition of the aluminum alloy plate used in the experiment is different (the added micro-alloyed rare earth elements are: Ce, 0.40%, Yb, 0.25%), and the main components of the inventive alloy plate are as follows: Table 3, the normal temperature mechanical properties of the obtained alloy sheet are shown in Table 4:

[0040] Table 3 Main chemical composition of plate alloys in this case (weight percent)

[0041] alloy Si Mg Fe Cu V Al ingredient 1 1.50％ 0.45％ 0.45％ 0.10％ 0.80％ margin ingredient 2 1.40％ 0.50％ 0.40％ 0.15％ 0.70％ margin ingredient 3 1.30％ 0.35％ 0.30％ 0.18％ 0.50％ margin ingredient 4 1.20％ 0.55％ 0.50％ 0.19％ 0.60％ margin ingredient 5 1.10％ 0.60％ 0.35％ 0.13％ 0.40％ margin

[0042] Table 4 The normal temperature mechanical properties of the alloy sheet in this case

[0043]

[0044]

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Abstract

The invention provides a rare earth modified aluminum alloy automotive body plate and a preparation method thereof. The preparation method comprises the steps of firstly, material preparing, secondly,smelting, thirdly, casting, fourthly, homogenizing annealing, fifthly, hot rolling, sixthly, cold rolling, seventhly, finished product sawing, eighthly, solution treatment and ninthly, pre-aging, andthe rare earth modified automotive body aluminum alloy plate containingcerium and ytterbium is obtained. According to the prepared automotive body aluminum alloy plate, it is guaranteed that a general aluminum-magnesium-silicon alloy has various properties, meanwhile, the forming property and the mechanical property are improved, the good anti-aging stability and baking hardening property are achieved, the alloy can meet the material requirement of the automotive body plate, and the alloy is applied to the field of automobile lightweight aluminum alloy preparation.

Description

technical field [0001] The invention belongs to the technical field of automobile lightweight, and in particular relates to a rare earth modified aluminum alloy automobile body plate and a preparation method thereof. Background technique [0002] Under the urgent situation that the world's automobile industry pays more and more attention to energy saving and environmental protection, reducing the weight of automobiles to reduce energy consumption, reduce exhaust emissions, and improve efficiency has become an important direction for major automobile companies to improve their competitiveness; and the use of aluminum alloys instead of steel materials is One of the main weight reduction methods adopted by automobile manufacturers in various countries. 2000 series (Al-Cu alloy), 5000 series (Al-Mg alloy) and 6000 series (Al-Mg-Si) aluminum alloy sheets have all been used to make automotive body panels. Due to the relatively poor corrosion resistance and strength of 2000-series...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/02C22C1/03C22C1/06C22F1/04C22F1/043
CPCC22C1/026C22C1/03C22C1/06C22C21/00C22C21/02C22F1/002C22F1/04C22F1/043
Inventor 华林孙倩胡志力
Owner WUHAN UNIV OF TECH
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