Wear-resisting aluminium alloy material for hubs and preparation method of material

Abstract

The invention provides a wear-resisting aluminium alloy material for hubs. The wear-resisting aluminium alloy material comprises the following chemical elements in percentage by mass: 8.4-8.8% of silicon, 0.7-0.9% of magnesium, 1.2-1.5% of titanium, 0.04-0.07% of cerium, 0.4-0.6% of boron, 0.1-0.2% of Hf, 0.06-0.08 of Nb, 0.2-0.4% of V and the balance of aluminum. The wear-resisting aluminium alloy material has the advantages of good abrasion performance, small coefficient of thermal expansion, small specific gravity, good mobility and good crack resistance; by adding a small quantity of cerium, boron, Hf, Nb and V, crystal grains are refined, and the strength and the hardness of the alloy are improved; the alloy is uniform in crystallization and high in strength by reasonably controlling casting aftertreatment temperature and putting alloying elements in batches; the quality of the alloy is relatively stable and uniform by using part of aluminium scrap as a raw material. The alloy is used for manufacturing the hubs, has good casting and forging performances and is high in safety factors and long in service life.

Description

technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to a wear-resistant aluminum alloy material for a wheel hub and a preparation method thereof. Background technique [0002] The quality and reliability of the wheels are not only closely related to the safety of the vehicle, but also closely related to the stability, comfort and safe operation of the vehicle during driving. Therefore, the wheel is required to have high precision in size and shape, good dynamic balance, high fatigue strength, good heat dissipation performance, good rigidity and elasticity. With the development of automobiles, the grades of automobiles are getting better and better, the speed of automobiles is getting faster and faster, and the requirements for individualization are getting higher and higher, so the requirements for automobile wheels are also getting higher and higher. [0003] Ordinary aluminum wheels are widely used in automobiles in our cou...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned three-piece aluminum alloy forged wheels are often produced with 6 series (aluminum-magnesium-silicon) alloy materials, but because the ductility of the 6 series (aluminum-magnesium-silicon) alloy materials is not enough, the three-piece aluminum alloy forged wheels after production The scalability and automatic fatigue recovery functions are not up to the requirements

[0006] Aluminum alloys for wheel hubs in my country still have some problems, such as insufficient strength, heavy weight, poor processing performance, poor heat dissipation, limited effect of deterioration treatment, unstable casting quality, etc. It is necessary to further improve the comprehensive performance of aluminum alloys for wheel hubs