Composite material for engine exhaust valve

Abstract

The invention discloses a composite material for an engine exhaust valve. The composite material for the engine exhaust valve is prepared from the following raw materials in parts by weight: 95 to 98 parts of aluminum, 2.3 to 3 parts of manganese, 0.4 to 0.5 part of silicon, 0.2 to 0.3 part of molybdenum, 0.1 to 0.2 part of titanium, 0.06 to 0.07 part of beryllium, 0.1 to 0.2 part of nickel, 0.07 to 0.1 part of tin, 0.06 to 0.1 part of hexadecyl trimethyl ammonium bromide, 3 to 5 parts of graphene oxide, 5 to 8 parts of zirconium hydride, 1.2 to 1.6 parts of hexachloroethane, 0.23 to 0.26 part of polyvinyl alcohol, 0.6 to 0.8 part of diamond micro-powder, 0.7 to 0.9 part of activated carbon, 0.2 to 0.4 part of manganese oxide, 0.9 to 1.3 parts of nano zirconium diboride, not more than 0.01 part of impurity and a proper volume of deionized water. The engine exhaust valve obtained by casting an aluminum alloy material provided by the invention has the advantages of a light weight, high strength, oxidation corrosion resistance, high temperature resistance and the like, and extremely has application value.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a composite material for engine exhaust valves. 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 equipment investment, low production cost, and is suitable for large...

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