Method for preparing copper-based self-lubricating material through in-situ stirring method

Abstract

The invention belongs to the technical field of high-performance materials, and relates to a method for preparing a copper-based self-lubricating material through an in-situ stirring method. The method specifically comprises the steps that copper-based melt is made to form vortex flow in a heating furnace in a stirring manner; a raw material forming a wild phase or a lubricating phase is added into the copper-based melt in a blowing manner; the raw material forming the wild phase or the lubricating phase and the copper-based melt generate the wild phase and the lubricating phase in situ under the action of the vortex flow, and the wild phase and the lubricating phase are rolled into the copper-based melt; and the wild phase and the lubricating phase are distributed in the copper-based melt highly evenly and dispersedly in an eccentric stirring manner and a quick cooling solidification manner. According to the method, the preparation process of the copper-based self-lubricating material is simplified in an in-situ generation manner, the interface bonding force of a second phase and a matrix is improved, and the self-lubricating copper-based alloy material with the wild phase and the lubricating phase distributed highly dispersedly is achieved through the means of eccentric stirring, solidification control and the like.

Description

Technical field: [0001] The invention belongs to the technical field of high-performance materials, and in particular relates to a method for preparing copper-based self-lubricating materials by an in-situ stirring method. Background technique: [0002] Friction phenomena are ubiquitous. According to statistics, about 1 / 3 to 1 / 2 of the world's energy consumption is finally manifested as friction loss in various ways. The economic loss caused by friction loss is huge. It is estimated that only abrasive wear is Make industrial countries lose 1% to 4% of their gross national product. Wear due to friction is one of the main causes of mechanical failure. Statistical analysis shows that the main cause of mechanical failure is not the fracture of components, but the tribological damage of moving linkages and mechanical parts. It can be seen that the problem of material wear is very important, and it plays a decisive role in the development of the national economy. Therefore, it ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned shortcomings of the existing preparation of self-lubricating materials, and to provide a method for preparing copper-based self-lubricating materials by in-situ stirring method. This method simplifies operations and reduces costs while improving the degree of freedom in material composition design , improve the compactness of the material, avoid the problem that the raw material is easily polluted, improve the bonding force between the reinforcing phase, the lubricating phase and the matrix copper, and at the same time ensure the uniformity of the large-sized homogeneous copper-based self-lubricating material ingot