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Brass composite powder and preparation method thereof

A technology of composite powder and brass, which is applied in the field of brass composite powder and its preparation, can solve problems such as poor corrosion resistance, poor compressive strength, and reduced product strength, and achieve good performance and quality, high corrosion resistance, and metal high cost effect

Active Publication Date: 2010-02-03
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Brass composite powder and preparation method thereof
  • Brass composite powder and preparation method thereof

Examples

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Embodiment 1

[0033] Embodiment 1: A brass composite powder, its composition ratio is shown in Table 2; its preparation method is: firstly mix the metal powder of each raw material according to the above ratio; then sinter in pure nitrogen and ammonia decomposition atmosphere The sintering temperature is 400-450°C, and the sintering time is 120 minutes; finally, after crushing, sieving and powder mixing for 120 minutes, the brass composite powder of the present invention is obtained.

Embodiment 2

[0034] Embodiment 2: A brass composite powder, its composition ratio is shown in Table 2; its preparation steps are the same as in Example 1; wherein the sintering treatment temperature is 500-550°C, and the sintering treatment time is 100 minutes; the powder mixing time is 90 Minute; All the other are with embodiment 1.

Embodiment 3

[0035] Embodiment 3: A brass composite powder, its composition ratio is shown in Table 2; its preparation steps are the same as in Example 1; wherein the sintering treatment temperature is 600-650°C, and the sintering treatment time is 90 minutes; the powder mixing time is 70 Minute; All the other are with embodiment 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04B22F9/24
Inventor 王绪其陈林孟庆芳曾明军
Owner CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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