Self-lubricating double-layer composite material and preparation method thereof

Abstract

The invention discloses a self-lubricating double-layer composite material and a preparation method thereof, and belongs to the field of self-lubricating materials. The structure of the self-lubricating double-layer composite material comprises a metal matrix layer and a self-lubricating layer, wherein a blind hole is arranged on one side of the metal matrix layer, the self-lubricating layer is embedded on the surface of the metal matrix layer, the thickness of the metal matrix layer is 1-50 mm, the thickness of the self-lubricating layer is 0.03-1.0 mm, the self-lubricating layer comprises apolymer matrix and an additive, and the adding amount of the additive is 5-35 wt%. According to the present invention, the self-lubricating double-layer composite material is obtained by raw materialpre-mixing raw materials, hole forming, compounding and heating curing; the preparation method has advantages of simple preparation process, low energy consumption and less pollution; and the obtaineddouble-layer composite material has strong bonding force and good self-lubricating property, can be used under severe working conditions, and can reduce the occurrence of peeling failure.

Description

technical field [0001] The invention belongs to the field of self-lubricating materials, in particular to a self-lubricating double-layer composite material and a preparation method thereof. Background technique [0002] At present, the self-lubricating materials with polymer-based composite materials as the self-lubricating layer mainly have three layers in the market, including the metal matrix layer, the middle layer and the surface layer of the self-lubricating composite material. [0003] The intermediate layer usually consists of a binder or a layer of sintered spherical copper powder. The three-layer self-lubricating composite material compounded with adhesive is limited by the adhesive and bonding compound process conditions, and it cannot meet the use requirements under some high-temperature operating conditions. It will cause peeling failure, and the adhesive has certain toxicity, which is easy to cause environmental pollution. Although the three-layer composite ...

AI Technical Summary

Problems solved by technology

The three-layer self-lubricating composite material compounded with adhesive is limited by the adhesive and bonding compound process conditions, and it cannot meet the use requirements under some high-temperature operating conditions. It will cause peeling failure, and the adhesive has certain toxicity, which is easy to cause environmental pollution

Although the three-layer composite material with a sintered copper powder layer to improve the bonding strength of the matrix layer and the surface layer can be used under working conditions, this type of thin-layer composite material, such as the application number 200810235590.0 "oil-lubricated or grease-lubricated self- Lubricated Sliding Bearing" patent document, the disclosed self-lubricating layer thickness is 0.02mm, because the self-lubricating layer is too thin, the surface self-lubricating layer cannot be cut and processed, and cannot meet the requirements of high-precision fit in some industrial occasions. In addition, the surface self-lubricating layer The change of friction coefficient after wear cannot meet the requirements of some industrial working conditions that require long-term stable friction; and this type of thick-layer composite material is very easy to peel off during machining and under unstable variable load conditions; in addition The production process of such materials is complicated, the cost is high, and the energy consumption increases

Images