Iron-copper alloy powder and preparation method thereof

A technology of iron-copper alloy and pre-alloyed powder, which is applied in the field of iron-copper alloy powder and its preparation, which can solve the problems of poor cold press formability, low bulk density, and high green strength, and achieve low bulk density and make up for loose bulk density. The effect of high density and high green strength

Active Publication Date: 2017-05-17
KUN SHAN DOTOP METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an iron-copper alloy powder and its preparation method, which solves the problems of high bulk density and poor cold-press formability in the production of alloy powder by the water atomization method, making it possible to produce The iron-copper alloy powder not only has the advantages of high purity, uniform structure, no segregation and good process performance, but also has low bulk density and high green strength. The higher green strength makes it have better formability and meets the needs of industrial Various application requirements on

Method used

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  • Iron-copper alloy powder and preparation method thereof

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Embodiment 1

[0055] (1) Copper powder is prepared by a water atomization method, and the prepared copper powder is roasted and crushed to obtain copper oxide powder with a particle diameter not greater than 75 μm, and the oxygen content in the copper oxide powder is 16%;

[0056] (2) adopt water atomization method to prepare iron-copper pre-alloy powder, wherein copper content is 10%, and iron content is 90%;

[0057] (3) The copper oxide powder prepared in step (1) and the iron-copper pre-alloy powder prepared in step (2) are added to the double cone mixer according to the mass ratio of copper oxide powder 30%, iron-copper pre-alloy powder 70% In the feeder, mix evenly for 48min to prepare the iron-copper powder precursor;

[0058] (4) the iron-copper powder precursor that is prepared in step (3) is placed in the N that volume ratio is 1:3 2 and H 2 The sintering is carried out in a mixed gas, the sintering temperature is set to 600°C, and the sintering time is 2h, so as to realize the ...

Embodiment 2

[0061] (1) Copper powder is prepared by a water atomization method, and the prepared copper powder is roasted and crushed to obtain copper oxide powder with a particle diameter not greater than 75 μm, and the oxygen content in the copper oxide powder is 17%;

[0062] (2) adopt water atomization method to prepare iron-copper pre-alloy powder, wherein copper content is 20%, and iron content is 80%;

[0063] (3) The copper oxide powder prepared in step (1) and the iron-copper pre-alloy powder prepared in step (2) are added to the double cone mixer according to the mass ratio of copper oxide powder 10%, iron-copper pre-alloy powder 90% In the feeder, mix evenly for 50 minutes to prepare the iron-copper powder precursor;

[0064] (4) the iron-copper powder precursor that is prepared in step (3) is placed in the N that volume ratio is 1:4 2 and H 2 The sintering is carried out in the mixed gas, the sintering temperature is set to 400°C, and the sintering time is 1.5h, so as to rea...

Embodiment 3

[0067] (1) Copper powder is prepared by a water atomization method, and the prepared copper powder is roasted and crushed to obtain copper oxide powder with a particle diameter not greater than 75 μm, and the oxygen content in the copper oxide powder is 20%;

[0068] (2) adopt water atomization method to prepare iron-copper pre-alloy powder, wherein copper content is 30%, and iron content is 70%;

[0069] (3) the copper oxide powder prepared in step (1) and the iron-copper pre-alloy powder prepared in step (2), according to copper oxide powder 20%, the mass ratio of iron-copper pre-alloy powder 80% is added to double cone mixer In the feeder, mix evenly for 40 minutes to prepare the iron-copper powder precursor;

[0070] (4) the iron-copper powder precursor that is prepared in step (3) is placed in the N that volume ratio is 1:5 2 and H 2 The sintering is carried out in the mixed gas, the sintering temperature is set to 850°C, and the sintering time is 3.5h, so as to realize...

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Abstract

The invention discloses iron-copper alloy powder and a preparation method thereof. The iron-copper alloy powder is prepared from the following raw materials in percentage by mass: 10-30 percent of copper oxide powder and 70-90 percent of iron-copper pre-alloyed powder. The preparation method comprises the following steps: selecting the copper oxide powder prepared through roasting and crushing, uniformly mixing the copper oxide powder and the iron-copper pre-alloyed powder according to a ratio, carrying out active diffusion sintering on the mixture in a reducing atmosphere, crushing and sieving the mixture subjected to sintering, and finally preparing the iron-copper alloy powder. The iron-copper alloy powder is lower in apparent density and good in formability, has the apparent density being 2.5-3.0g/cm<3> and the green strength being 12-15MPa, makes up for the deficiencies in the prior art and broadens the application market.

Description

technical field [0001] The invention relates to the field of metallurgical industry, in particular to a metal alloy and a preparation method thereof, in particular to an iron-copper alloy powder and a preparation method thereof. Background technique [0002] Iron-copper alloys are widely used as powder metallurgy, friction materials, oil-impregnated bearing materials, and diamond tool matrix materials. In recent years, powder metallurgy, diamond tools, decorative materials and other industries have developed rapidly, and the application of iron-copper alloy powder has become more and more extensive. [0003] Traditional iron-copper powder preparation methods mainly include: (1) mechanical mixing method, that is, directly mechanically mixing iron powder and copper powder; (2) copper-coated iron method, that is, coating iron powder with copper by electroless plating ; (3) Atomization method, that is, the iron-copper metal is first melted and then atomized into iron-copper pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/22
CPCB22F1/0003B22F9/22
Inventor 朱胜利陈文华郭殿月刘茹晶朱金花
Owner KUN SHAN DOTOP METAL TECH CO LTD
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