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Preparation method for sphere-like tungsten powder

A technology of near-spherical and tungsten powder, which is applied in the field of preparation of nearly-spherical tungsten powder, can solve the problems of long process route, difficult control of process parameters, and large waste liquid pollution, and achieve simplified preparation process, simple treatment method and process flow, Effects with easy-to-control parameters

Inactive Publication Date: 2015-06-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process route of this method is long, the process parameters are not easy to control, and the waste liquid pollution produced is large

Method used

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  • Preparation method for sphere-like tungsten powder
  • Preparation method for sphere-like tungsten powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Weigh a certain mass of tungsten oxide powder, then move the powder particles into the spheroidization equipment, and carry out spheroidization and shaping treatment on the tungsten powder under the conditions of a rotation speed of 3000r / min and a processing time of 60min;

[0025] 2) Sieving the tungsten oxide powder particles after the spheroidization treatment in step 1 to obtain a nearly spherical tungsten oxide powder with uniform particle size;

[0026] 3) Put the nearly spherical tungsten oxide powder in step 2 into a reduction furnace for reduction, the reduction temperature is 750°C, and the reduction time is 40 minutes. Prepared nearly spherical tungsten powder particles.

Embodiment 2

[0028] 1) Weigh a certain mass of tungsten oxide powder, then move the powder particles into the spheroidization equipment, and carry out spheroidization and shaping treatment on the tungsten powder under the conditions of the rotation speed of 3000r / min and the processing time of 30min;

[0029] 2) Sieving the tungsten oxide powder particles after the spheroidization treatment in step 1 to obtain a nearly spherical tungsten oxide powder with uniform particle size;

[0030] 3) Put the nearly spherical tungsten oxide powder in step 2 into a reduction furnace for reduction, the reduction temperature is 700°C, and the reduction time is 120 minutes. The near-spherical tungsten powder particles with uniform particle size are obtained.

Embodiment 3

[0032] 1) Weigh a certain mass of tungsten oxide powder, then move the powder particles into the spheroidization equipment, and carry out spheroidization and shaping treatment on the tungsten powder under the condition of the rotation speed of 4000r / min and the processing time of 15min;

[0033] 2) Sieving the tungsten oxide powder particles after the spheroidization treatment in step 1 to obtain a nearly spherical tungsten oxide powder with uniform particle size;

[0034] 3) Put the nearly spherical tungsten oxide powder in step 2 into a reduction furnace for reduction, the reduction temperature is 750°C, and the reduction time is 60 minutes. The near-spherical tungsten powder particles with uniform particle size are obtained.

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Abstract

The invention discloses a preparation method for sphere-like tungsten powder, and belongs to the field of powder preparation. The preparation method comprises the steps as follows: shaping granular tungsten oxide powder, screening, reducing the shaped tungsten oxide powder in a reducing atmosphere, and cooling to obtain the sphere-like tungsten powder. The production technology for the sphere-like tungsten powder is greatly simplified, and the preparation method has the characteristics of simple process, high production efficiency, short cycle, low production cost and the like.

Description

technical field [0001] The invention discloses a preparation method of nearly spherical tungsten powder, which belongs to the field of powder preparation. Background technique [0002] The tungsten powder commonly used in the industry is mainly obtained by reducing tungsten oxide powder with hydrogen. This kind of powder has irregular particle shape, poor fluidity and low bulk density. In recent years, the demand for nearly spherical or spherical tungsten powder has increased, and it is widely used in powder metallurgy processes such as preparation of porous materials, thermal spraying and injection molding. Products prepared by using nearly spherical or spherical tungsten powder have uniformly distributed and interconnected pores, so it can replace conventional tungsten powder in the preparation of porous tungsten. It can be mainly used in the preparation of cathodes of high-power pulsed microwave tubes, filter materials, rocket sweating materials, thermal spraying, porou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22
Inventor 贾成厂王聪聪梁栋高鹏崔照雯常宇宏
Owner UNIV OF SCI & TECH BEIJING