Aluminum-base alloy self-lubricating material and preparation method thereof

Abstract

A aluminum-based alloy self-lubricating materials and method for making same relates to the technology for preparing composite metal materials. Aimming at the evil of large gas cavity amount in aluminum-based alloy self-lubricating materials, there is disclosed a aluminum-based alloy self-lubricating materials and method for making same. Said scheme is as follows: selecing aluminium alloy as a basal body alloy, adding a slipping agent into the aluminium alloy fused mass, wherein said slipping agent is composed of one of copper facing mineral carbon or one mixture of copper facing mineral carbon and copper facing carbon fabric or one mixture of copper facing mineral carbon and nickel plating carbon fibre and is prepared through stirring-mixing, vacuum outgassing and casting, and the basal body aluminium alloy comprises (based on mass percent) Si of 6.5-9.0, Mg of 0.8-1.2, Mn of 0.1-0.5, Ti of 0.1-0.25, Zn of not more than 0.3, Fe of not more than 0.5, Cu of not more than 0.3, Ni of not more than 0.1, in which the allowance is Al. The weight of the added substance is 7-12%, 10-18% and 10-17 of the total weight of the aluminum-based alloy respectively when copper facing mineral carbon, the mixture of copper facing mineral carbon and copper facing carbon fabric and the mixture of copper facing mineral carbon and nickel plating carbon fibre are adopted. There is less gas cavities existing in said material.

Description

Technical field [0001] The invention relates to a metal-based composite material preparation technology, in particular to the addition of copper-plated graphite carbon fiber and nickel-plated carbon fiber to enhance the self-lubricating performance of an aluminum-based alloy and its preparation technology. Background technique [0002] At present, there are several methods for preparing reinforced aluminum-based self-lubricating materials: [0003] Vacuum pressure infiltration method Vacuum pressure infiltration method is also called vacuum infiltration method. In this method, the reinforcing phase is first made into a preform, and then placed in a pressure-bearing casting mold, heated, vacuumed, and the negative pressure generated by the vacuum allows the liquid matrix metal melt to overcome the frictional resistance of capillary action and promote the melt to the ceramic reinforcement The wetted and penetrated into the pores of the preform are solidified and formed into a compo...

AI Technical Summary

Problems solved by technology

However, in the process of preparing composite materials by traditional stirring casting method, a large number of pores will be formed in the composite material, which seriously affects the performance of the composite material.