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Method for preparing refractory metal powder

A technology for melting metals and refractory metals, which is applied in the field of producing refractory metal powders, and can solve problems such as complex equipment, polluted solvent environment, and time-consuming

Pending Publication Date: 2020-10-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201711022391 describes a method for preparing titanium powder, which includes: mixing titanium material with calcium oxide, pressing, sintering, mixing and pressing the sintered product with calcium hydride to obtain a pre-reduced billet, and then undergoing vacuum thermal reduction to obtain a crude product, The crude product is pickled, washed, and dried to finally obtain titanium powder, but the whole process takes 6 hours or more
[0006] At present, there are existing methods to realize the preparation of refractory metal powders, but these methods all have the problems of complex equipment, long process routes, long time consumption, by-products or solvents used to pollute the environment

Method used

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  • Method for preparing refractory metal powder
  • Method for preparing refractory metal powder

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Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 Shown, this method for preparing refractory metal powder, it may further comprise the steps:

[0033] Step 1: Carry out wire-cutting and grinding of refractory metal raw material niobium, and process it into granules, wherein the granule size is 10mm;

[0034] Step 2: Place 3.5g of the granular raw material obtained in Step 1 in the induction coil of the electromagnetic levitation refining equipment, pass through the protective gas of pure Ar (gas flow rate is 1.0L / min), ventilate for 3 minutes, turn on the coil cooling water and power on , Control power supply system: input current 400A, input power 4500W, input frequency 400kHz, after the power is turned on, metal particles are suspended and melted into liquid and suspended in the air;

[0035] Step 3: Continue to suspend and smelt the metal particles suspended in step 2. When the temperature reaches 2950K, the molten droplets start to evaporate, and the metal powder produced is suspended in the prot...

Embodiment 2

[0040] Such as figure 1 Shown, this method for preparing refractory metal powder, it may further comprise the steps:

[0041] Step 1: wire-cut and grind the refractory metal raw material titanium, and process it into granules, wherein the granule size is 11mm;

[0042] Step 2: Place 2.5g of the granular raw material obtained in Step 1 in the induction coil of the electromagnetic levitation refining equipment, pass through the protective gas pure Ar (gas flow rate is 1.0L / min), ventilate for 3 minutes, turn on the coil cooling water and power on , Control power supply system: input current 300A, input power 4000W, input frequency 330kHz, after the power is turned on, the metal particles are suspended and melted into liquid and suspended in the air;

[0043] Step 3: Continue suspending and smelting the metal particles suspended in step 2. When the temperature reaches 2133K, the molten droplets start to evaporate, and the metal powder produced is suspended in the protective gas....

Embodiment 3

[0048] Such as figure 1 Shown, this method for preparing refractory metal powder, it may further comprise the steps:

[0049] Step 1: Carry out wire cutting and grinding of refractory metal raw material nickel, and process it into granules, wherein the granule size is 10mm;

[0050] Step 2: Place 3.2g of the granular raw material obtained in Step 1 in the induction coil of the electromagnetic levitation refining equipment, pass through the protective gas of pure Ar (gas flow rate is 1.5L / min), ventilate for 3 minutes, turn on the coil cooling water and power on , Control power supply system: input current 280A, input power 3500W, input frequency 220kHz, after the power is turned on, the metal particles suspend and melt into a liquid state and suspend in the air;

[0051] Step 3: Continue suspending and smelting the metal particles suspended in step 2. When the temperature reaches 1928K, the molten droplets start to evaporate, and the metal powder produced is suspended in the pr...

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Abstract

The invention relates to a method for preparing refractory metal powder, and belongs to the technical field of preparation of metal powder. The method comprises the steps of processing refractory metal raw materials into granular raw materials; placing the obtained granular raw materials into an induction coil of electromagnetic suspension refining equipment, charging protective gas namely pure Ar, enabling an electric source to be switched on, and enabling the metal granules to suspend and melt into liquid suspending in air; continuing performing suspension melting on the suspending metal granules, when the temperature of liquid metal molten drops is far greater than melting temperature, enabling the liquid metal to begin to evaporate, producing metal powder suspending in protective gas,performing condensing, and collecting condensed powder in the protective gas at the position of a gas outlet; and performing drying treatment on the condensed powder to obtain the refractory metal powder. By the method, the problem of preparation of refractory metal material powder can be solved, and quick, simple and environment-friendly preparation of the refractory metal powder can be realized.

Description

technical field [0001] The invention relates to a method for preparing refractory metal powder, belonging to the technical field of metal powder preparation. Background technique [0002] Refractory metals play an important role in the development of new materials and the improvement of the properties of existing materials. For new materials with high precision, the alloying elements added must meet the requirements of particle size and quality at the same time. At present, the main preparation methods of metal powder are plasma rotating electrode method, gas atomization method and physical and chemical method. [0003] The plasma rotating electrode method is easy to produce spherical powder with good sphericity, but it is not easy to produce powder, and the material utilization rate is not high; the gasification atomization method is divided into traditional atomization technology and new atomization technology, and the traditional atomization technology is suitable for ma...

Claims

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Application Information

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IPC IPC(8): B22F9/12
CPCB22F9/12
Inventor 张桂芳姜琦施哲严鹏周春晖刘宇杨睿潇杨清荣
Owner KUNMING UNIV OF SCI & TECH
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