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Premixed bronze powder and preparation method and application thereof

A bronze powder and pre-mixing technology, which is applied in the field of metal alloys, can solve the problems such as the oil content of oil-impregnated bearings that are not mentioned, and achieve the effect of good application prospects.

Active Publication Date: 2015-04-29
KUN SHAN DOTOP METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bulk density of the Cu-Sn10 alloy powder prepared by this invention is ≤2.5g / cm 3 , shrinkage rate ≤ 2%, fluidity ≤ 34s / 50g, but did not mention the oil content of the oil-impregnated bearing made from it

Method used

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  • Premixed bronze powder and preparation method and application thereof
  • Premixed bronze powder and preparation method and application thereof
  • Premixed bronze powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this example, premixed bronze powder was prepared from the following raw materials:

[0035]

[0036] The mass percentages of atomized copper powder and electrolytic copper powder in the mixed copper powder are: 90% atomized copper powder and 10% electrolytic copper powder.

[0037] Prepare above-mentioned premixed bronze powder by following method, specifically comprise the following steps:

[0038] (1) In the intermediate frequency melting furnace, the primary copper plate of the raw material is melted into a molten metal, and the high-pressure water with a pressure of 20 MPa injected from a cylindrical high-pressure nozzle with an inner diameter of 5 mm is used to impact the molten metal fluid, dehydrate, dynamically oxidize, and screen , making -350 mesh atomized copper powder;

[0039] (2) Add electrolytic copper powder to the atomized copper powder, mix evenly, carry out high-temperature sintering and agglomeration at 850° C., pulverize, and sieve to obtain...

Embodiment 2

[0042] In this example, premixed bronze powder was prepared from the following raw materials:

[0043]

[0044] The mass percentages of atomized copper powder and electrolytic copper powder in the mixed copper powder are: 80% atomized copper powder and 20% electrolytic copper powder.

[0045] Prepare above-mentioned premixed bronze powder by following method, specifically comprise the following steps:

[0046] (1) In the intermediate frequency melting furnace, the primary copper plate of the raw material is melted into a molten metal, and the high-pressure water with a pressure of 22 MPa injected from a cylindrical high-pressure nozzle with an inner diameter of 5 mm is used to impact the molten metal fluid, dehydrate, dynamically oxidize, and sieve , making -350 mesh atomized copper powder;

[0047] (2) Add electrolytic copper powder to the atomized copper powder, mix evenly, carry out high-temperature sintering and agglomeration at 800° C., pulverize, and sieve to obtain ...

Embodiment 3

[0050] In this example, premixed bronze powder was prepared from the following raw materials:

[0051]

[0052] The mass percentages of atomized copper powder and electrolytic copper powder in the mixed copper powder are: 95% atomized copper powder and 5% electrolytic copper powder.

[0053] Prepare above-mentioned premixed bronze powder by following method, specifically comprise the following steps:

[0054] (1) In the intermediate frequency melting furnace, the primary copper plate of the raw material is melted into a molten metal, and the high-pressure water with a pressure of 25 MPa injected from a cylindrical high-pressure nozzle with an inner diameter of 5 mm is used to impact the molten metal fluid, dehydrate, dynamically oxidize, and sieve , making -350 mesh atomized copper powder;

[0055] (2) Add electrolytic copper powder to the atomized copper powder, mix evenly, carry out high-temperature sintering and agglomeration at 900° C., pulverize, and sieve to obtain m...

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Abstract

The invention provides premixed bronze powder and a preparation method and application thereof. The premixed bronze powder is mainly prepared from the following raw materials in percentage by mass: 87.4-90.2% of mixed copper powder prepared from atomized copper powder and electrolytic copper powder, 9-11% of tin powder, 0.4-0.8% of zinc stearate and 0.4-0.8% of lithium stearate. The preparation method comprises the steps of preparing the atomized copper powder through high-pressure water atomization, then, mixing the atomized copper powder with the electrolytic copper powder, carrying out high-temperature sintering so as to agglomerate, crushing, sieving, and mixing the mixed copper powder with the tin powder, zinc stearate and lithium stearate, thereby obtaining the premixed bronze powder. According to the premixed bronze powder provided by the invention, the loose specific weight is 2.5-2.8g / cm<3>, the particle size distribution is -100 to -325 meshes, and an oil-retaining bearing manufactured from the premixed bronze powder has the oil content reaching 30-35%, the contraction ratio of -0.2% to 0.5% and the crushing strength of 30,000psi and can meet the requirements of technologies and markets.

Description

technical field [0001] The invention belongs to the technical field of metal alloys, and relates to a premixed bronze powder, a preparation method and an application thereof. Background technique [0002] Copper-tin miniature oil-impregnated bearings have the advantages of strong corrosion resistance, high mechanical strength, high thermal conductivity, and long service life. They are widely used in precision electronics, high-end household appliances, communication facilities, automobiles, and IT. A class of essential basic parts. Since the raw material copper tin powder has a great influence on the final performance of miniature oil-impregnated bearings, the research on the raw material powder and how to improve the powder performance have always been paid attention to by people. [0003] The oil-impregnated bearing is a porous sintered body made of metal powder as the main raw material through the powder metallurgy method. The lubricating oil is infiltrated into the pore...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08
Inventor 朱胜利王汉宁陈文华
Owner KUN SHAN DOTOP METAL TECH CO LTD
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