Preparation method of high-fine-grain atomized copper alloy powder

Abstract

The invention relates to the technical field of new materials, specifically a preparation method of high-fine-grain atomized copper alloy powder, the alloy comprises the following elements in percentage by mass: 5-27% of PB, 0.5-15% of Sn, 1-6% of Zn, 2-9% of Ni and balance of Cu; The crystal grain growth inhibitors such as chromium, vanadium and the like added in the preparation process play a role in the sintering process of atomized copper powder so as to prevent irregular growth of partial copper alloy crystal grains effectively and homogenize the crystal grains in the alloy; a copper-based bearing alloy produced by atomizing the copper alloy powder with the high fine grain structure can reduce the inherent defects of the powder metallurgy production process radically and improve the performance of the whole material.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of highly fine-grain atomized copper alloy powder. Background technique [0002] The atomized copper alloy powder of the invention is a friction-reducing material for producing copper-based bearing materials for internal combustion engines. In recent years, with the development of internal combustion engines in the direction of high speed and high supercharging, the technical requirements for antifriction materials for internal combustion engine sliding bearings are also getting higher and higher. Copper-based bearing alloy is a very important anti-friction material for bearings. When heavy-duty engines and high-speed engines become the main body of the market, ordinary copper-based bearing alloys have been difficult to meet the needs of the market. Due to the inherent defects in the powder metallurgy production process of ordinary copper-b...

AI Technical Summary

Problems solved by technology

[0004] In the past few decades, atomized copper powder has been widely used as an antifriction material for copper-based bearings. Domestic atomized copper powder manufacturers are only limited to producing atomized copper powder. There is not much attention paid to the microstructure of its materials, and there are no corresponding research reports in relevant domestic research institutions. In theory, so far, the industry has no authoritative theory to support it.

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