High-performance aluminum alloy ingot for electric vehicle and preparation method

Abstract

The invention relates to the technical field of aluminum alloy preparation, in particular to a high-performance aluminum alloy ingot for an electric vehicle and a preparation method. By adjusting an existing aluminum alloy ingot formula, the magnesium content is greatly reduced, the silicon content is improved, the original performance can be met, the performance is higher than the original performance, and the performance index is improved; in the aspect of cost saving, the cost per ton can be saved by more than 200 yuan, the tensile strength is improved to 220 MPa from original 180 MPa and is improved by 22% through the adjustment of the new formula, the ductility is improved to 3% from original 2% and is improved by 50% through the adjustment of the new formula, and the hardness is improved to more than 65 from original 50 HB and is improved by 30% through the adjustment of the new formula; and the problems that the reject ratio of an existing aluminum alloy die-casting product is up to 25% or above, the follow-up remelting loss is large due to the high magnesium content proportion, the requirement for the die-casting technology after remelting is strict, and the yield is low are solved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy preparation, in particular to a high-performance aluminum alloy ingot for electric vehicles and a preparation method thereof. Background technique [0002] At present, the automobile industry is developing rapidly, among which high-speed, energy-saving and comfortable electric vehicles are the focus of development, and aluminum alloy, as a necessary component, not only bears the weight of electric vehicles, but also is an integral part of the appearance of electric vehicles. Higher security requirements are required. [0003] The existing electric vehicle aluminum alloy ingot adopts the ADC6 brand aluminum alloy ingot in the Japanese JIS 5032 standard, the magnesium content accounts for 2.5%-4.0%, and the silicon content accounts for less than 1%, resulting in poor fluidity after remelting of the alloy brand aluminum ingot , The defect rate of die-casting products is as high as 25%, and th...

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Problems solved by technology

[0003] The existing electric vehicle aluminum alloy ingot adopts the ADC6 brand aluminum alloy ingot in the Japanese JIS 5032 standard, the magnesium content accounts for 2.5%-4.0%, and the silicon content accounts for less than 1%, resulting in poor fluidity after remelting of the alloy brand aluminum ingot , the defect rate of die-casting products is as high as more than 25%, the high proportion of magnesium content will cause a large loss in subsequent remelting, and the die-casting process after remelting is strict, and the yield is low