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.
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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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