Brass composite powder and preparation method thereof

Abstract

The invention provides brass composite powder, which is characterized in that the brass composite powder is prepared from 70 to 97 percent of copper and 3 to 30 percent of zinc in percentage by weight. The invention also provides a preparation method for the brass composite powder. The invention provides a substitute raw material with low cost and good product performance and quality for manufacture, application and development of the prior brass-based powder metallurgical products and parts.

Description

technical field [0001] The invention relates to a metal powder and a preparation method thereof, in particular to a brass composite powder and a preparation method thereof. Background technique [0002] Powder metallurgy is a new process for producing special materials and products by using metal or non-metal powder or composite powder. It saves energy and reduces raw material consumption. It is widely used in various fields of national economy and has broad development prospects. Brass-based powder metallurgy parts and products are an important field of powder metallurgy materials. They are widely used because of their good strength, wear resistance, corrosion resistance and bright appearance. They are used in powder metallurgy machinery parts, oil bearings, friction materials and other fields. Traditional powder metallurgy parts and products use brass alloy powder or purely physical mixed powder of copper powder and zinc powder as raw materials, but both have obvious defe...

AI Technical Summary

Problems solved by technology

For example, when brass alloy powder is used as raw material, because brass alloy powder is basically prepared by atomization method, the shape of powder particles is relatively regular, mostly spherical or nearly spherical, and the bulk density is high, resulting in poor powder formability and powder compaction. And after sintering, the strength of the product is reduced, which affects the performance of the product; and the pure physical mixed powder of copper powder and zinc powder is used as the raw material, and because of the inevitable metal composition segregation and poor alloying degree, the product performance is greatly reduced, resulting in its resistance to corrosion. Poor compressive strength, poor wear resistance, poor corrosion resistance

In short, due to the preparation process of pure physical mixed powder of brass alloy powder or copper powder and zinc powder, the products produced with it as raw materials have insurmountable defects in performance.

In addition, due to the rising prices of non-ferrous metals in recent years, which limits the application and development of brass-based powder metallurgy parts and products, it is urgent to find alternative raw materials with relatively low prices that do not affect the performance of their products.

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