Aluminium-matrix composite material for automobile transmission gear, and preparation method thereof

Abstract

The invention discloses an aluminium-matrix composite material for an automobile transmission gear, and a preparation method thereof. The aluminium-matrix composite material is prepared from the following raw materials in parts by weight: 95-98% of aluminium, 0.1-0.14% of germanium, 1-1.2% of manganese, 0.13-0.16% of titanium, 0.3-0.35% of copper, 0.04-0.06% of lithium, 0.2-0.3% of zinc, 0.06-0.1% of cetyl trimethyl ammonium bromide, 3-5% of graphene oxide, 5-8% of zirconium hydride, 0.85-1% of hexachloroethane, 0.4-0.6% of calcareous shale, 0.24-0.3% of sodium alginate, 0.2-0.4% of calcium silicide, 2.3-2.4% of silicon dioxide, not greater than 0.01% of impurities, and an appropriate amount of deionized water. According to the aluminium-matrix composite material disclosed by the invention, improvement for the comprehensive performance of an industrial aluminium alloy is effectively realized through improvement for a casting process, and the requirements of a high load, a light weight and good toughness of the automobile transmission gear can be met; and the aluminium-matrix composite material is low in preparation cost and worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of automobile parts, in particular to an aluminum-based composite material for automobile transmission gears and a preparation method thereof. Background technique [0002] Aluminum matrix composites have high specific strength, specific stiffness, and specific modulus of elasticity, as well as good wear resistance and high temperature resistance, so they have received extensive attention. The commonly used techniques for the preparation of particle-reinforced aluminum matrix composites include powder metallurgy and casting. However, the process equipment of the powder metallurgy method is complex and the cost is high, and it is not easy to prepare large-volume and complex-shaped parts. Moreover, there are dangers such as powder combustion and explosion during the production process. The casting method has simple process and convenient operation, can produce large-volume composite materials, has less equip...

AI Technical Summary

Problems solved by technology

In the article "Preparation and Mechanical Properties of Graphene Reinforced Aluminum Matrix Composite Materials", Gao Xin used Hummers to prepare graphene oxide with a large amount of negative charges, and then treated the aluminum powder with a cationic surfactant to make the surface positively charged, and Graphene is evenly adsorbed on the surface of aluminum powder by electrostatic self-assembly, and finally the aluminum matrix composite is prepared by hot pressing and sintering. However, the amount of surfactant and the amount of graphene added will affect the sintering performance and affect the material Hardness, tensile strength, mechanical properties, etc. are greatly affected, and the stability of material quality is poor