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Method for preparing multi-element pre-alloyed powder based on ferrothermal reaction and preparation method of diamond tool matrix

A pre-alloyed powder, thermal reaction technology, applied in other manufacturing equipment/tools, engine components, turbines, etc., can solve the problems of segregation of alloy components, long time-consuming ball milling process, ecological environment pressure, etc. High efficiency and simple operation

Pending Publication Date: 2022-04-05
NEW SAGA MATERIALS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Air, nitrogen or argon can be used for gas atomization. The gas atomization cooling speed is fast and the powder yield is high, but the powder grains are relatively coarse.
[0008] (2) Hydrometallurgy: The hydrometallurgical method is to dissolve metal ions in water, and the different elemental metals in the alloy (such as cobalt, copper, iron nitrate solution) are mixed in the solution in correct proportions to form metal salts, and then After precipitation and reduction, a very fine metal alloy powder is obtained. Since each powder particle of the wet pre-alloyed powder contains various metal elements that make up the alloy, the composition of the pre-alloyed powder is quite uniform, but this method will cause harm to the ecological environment. pressure
This method is simple and low in production cost, but the ball milling process takes a long time and the components in the obtained alloy have segregation phenomenon

Method used

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  • Method for preparing multi-element pre-alloyed powder based on ferrothermal reaction and preparation method of diamond tool matrix
  • Method for preparing multi-element pre-alloyed powder based on ferrothermal reaction and preparation method of diamond tool matrix
  • Method for preparing multi-element pre-alloyed powder based on ferrothermal reaction and preparation method of diamond tool matrix

Examples

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Effect test

Embodiment 1

[0054] A method for preparing multi-component pre-alloyed powder based on ferrothermal reaction, specifically comprising the following steps:

[0055] Step S1: Mix iron powder and copper oxide fully to obtain an alloy system, then continue to add carbon powder and a combustion enhancer to the alloy system and mix thoroughly to obtain a mixture; wherein, the mass of iron powder is 70% of the alloy system. %, the iron powder is composed of high-purity iron powder with an average particle size of 1-15 μm and iron powder with an average particle size of 30 μm-200 mesh, and the quality of the high-purity iron powder with an average particle size of 1-15 μm is 10% of the alloy system; copper oxide The average particle size of the carbon powder is 1-15 μm, and the quality of copper oxide is 30% of the alloy system; the average particle size of the carbon powder is 325-500 mesh, and its quality is 10% of the iron powder; the combustion aid is potassium chlorate, One of potassium perch...

Embodiment 2

[0059] According to the method described in Example 1, high-purity FeCu binary pre-alloyed powders with different mass ratios of iron and copper were prepared. The difference from Example 1 is that no combustion accelerant is added in this example, and the quality of the iron powder in this example is 98% of that of the alloy system. The mass is 50% of the substance of the alloy system; the average particle size of copper oxide is 1-15 μm, and the mass of copper oxide is 2% of the substance of the alloy system; the mass of carbon powder is 66.5% of the mass of iron powder.

Embodiment 3

[0061] According to the method described in Example 1, high-purity FeCu binary pre-alloyed powders with different mass ratios of iron and copper were prepared. The difference from Example 1 is that no combustion accelerant is added in this example, and the quality of the iron powder in this example is 90% of that of the alloy system, wherein the average particle diameter in the iron powder is 1-15 μm for high-purity iron powder The mass is 50% of the alloy system; the average particle size of copper oxide is 1-15 μm, and the copper oxide is 10% of the alloy system; the carbon powder is 66% of the iron powder.

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Abstract

The invention discloses a method for preparing multi-element pre-alloyed powder based on a ferro-thermal reaction and a preparation method of a diamond tool matrix, and the method comprises the following steps of: forming a high temperature of 800-1100 DEG C by utilizing the characteristic that iron powder with the average particle size of less than 30 microns has extremely strong flammability and can be ignited to release ferro-heat with a large amount of heat, so that the multi-element pre-alloyed powder is prepared; and the iron powder and the additive are welded together or the additive is coated with the iron powder, so that a precursor which is high in alloying degree, uniform in component and free of segregation and contains a metal oxide is obtained. The method is easy to operate, the precursor containing the metal oxide can be obtained only by igniting an alloy system substance, finally the multi-element pre-alloyed powder is obtained after the metal oxide in the precursor is fully reduced, in this way, the complex preparation process of the multi-element pre-alloyed powder in the existing market is simplified, the preparation cost is greatly reduced, and therefore the multi-element pre-alloyed powder has good application prospects. The method has a great market application prospect.

Description

technical field [0001] The invention belongs to the technical field of alloy powder preparation, and in particular relates to a method for preparing multi-element pre-alloy powder based on ferrothermal reaction and a method for preparing a diamond tool matrix. Background technique [0002] Metal combustion synthesis (combustion synthesis) was first proposed by Goldschmidt in 1908 as "thermite method" to describe the exothermic reaction of metal oxide and aluminum to produce alumina and metal or alloy. [0003] In 1953, the British first proposed the self-propagating concept of metal powder combustion in the paper "Self-propagating Process of Strong Exothermic Chemical Reaction". And the self-propagating high-temperature synthesis method proposed by Merzhanov et al. in 1967, the main advantage of this method is that the energy required for reaction synthesis is generated by itself (energy saving), the product purity is high (low boiling point impurities volatilize under high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F5/00
CPCB22F9/22B22F5/00B22F2005/001
Inventor 赵景学毕琨
Owner NEW SAGA MATERIALS SCI & TECH CO LTD