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Preparation method for micro-fine spherical titanium alloy powder

A technology for titanium alloy powder and alloy body is applied in the field of preparation of fine spherical titanium alloy powder, which can solve the problems of coarse powder particle size, low powder fluidity, low oxygen content, and high production cost, and achieve uniform particle size distribution, simple operation, and high production cost. Effects that are easy to automate

Inactive Publication Date: 2014-12-17
SUZHOU ZHIYAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The shape of the titanium alloy powder prepared by the rotating electrode method is regular spherical, the powder has good fluidity, and the oxygen content is low, but the particle size of the powder is relatively coarse, and the production cost is high

Method used

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preparation example Construction

[0018] The preparation method of the fine spherical titanium alloy powder of the present invention comprises the following steps:

[0019] First, titanium hydride or titanium and at least two alloying elements (alloying elements are preferably Al, V, Fe, Zr, Mo and Nb) are selected for batching. Since titanium hydride or titanium and at least two alloying elements are used as raw materials, the products are titanium alloy powder and water. The raw materials and products are non-toxic and harmless, and will not pollute the environment or damage high-frequency plasma equipment.

[0020] Then use hydrogen or nitrogen as carrier gas to send the above-mentioned ingredients into a plasma torch for vaporization and melting to form an alloy body. The high-frequency plasma equipment used in this step is as figure 1 As shown, it mainly includes feeder, plasma torch, RF generator (radio frequency generator), heat exchange chamber and gas-solid separation chamber. In this step, the meth...

Embodiment 1

[0024] This embodiment provides a preparation method of fine spherical titanium alloy powder, comprising the following steps:

[0025] (a) Select titanium hydride and Al, Fe, Mo three alloying elements for batching;

[0026] (b) Use nitrogen as the carrier gas to send the ingredients into the plasma torch for vaporization and melting to form an alloy body. The flow rate of the carrier gas is 0.5m 3 / h, the feed rate is 5g / min, and the power of the plasma torch is 50kW, and the flow rate of the generated gas is 1m 3 / h of argon, side gas flow rate 1m 3 / h of nitrogen, the pressure is a negative pressure of 200mm Hg;

[0027] (c) Lead the alloy body into a heat exchange chamber with a temperature of 150°C, and the heat exchange adopts a flow rate of 0.3m 3 / h cooling air;

[0028] (d) Introduce the fine spherical titanium alloy powder into the gas-solid separation chamber to collect the solid powder.

Embodiment 2

[0030] This embodiment provides a preparation method of fine spherical titanium alloy powder, comprising the following steps:

[0031] (a) Select titanium hydride and Fe, Mo, Nb three alloying elements for batching;

[0032] (b) Use nitrogen as the carrier gas to send the ingredients into the plasma torch for vaporization and smelting to form an alloy body. The flow rate of the carrier gas is 5m 3 / h, the feed rate is 100g / min, and the power of the plasma torch is 5kW, and the flow rate of the generated gas is 3m 3 / h of argon, the side gas flow rate is 20m 3 / h of nitrogen, the pressure is a negative pressure of 50mm Hg;

[0033] (c) Lead the alloy body into a heat exchange chamber with a temperature of 150°C, and the heat exchange adopts a flow rate of 0.3m 3 / h cooling air;

[0034] (d) Introduce the fine spherical titanium alloy powder into the gas-solid separation chamber to collect the solid powder.

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Abstract

The invention relates to a preparation method for micro-fine spherical titanium alloy powder. The preparation method comprises the following steps: (a) selecting and mixing titanium hydride or titanium and at least two alloy elements; (b) taking hydrogen or nitrogen as carrier gas and conveying a mixture into a plasma torch to be gasified and smelted to form an alloy body, wherein the flow of the carrier gas is 0.5-5m<3> / h and the feeding speed is 5-100g / min; and (c) leading the alloy body into a heat exchanging chamber with the temperature of 150-300 DEG C to form the micro-fine spherical titanium alloy powder. According to the preparation method for the micro-fine spherical titanium alloy powder provided by the invention, on the one hand, the hydrogen or the nitrogen is used as the carrier gas to convey the mixture into the plasma torch to be gasified, so that the titanium and other metal elements can form the alloy body with the uniformly-distributed elements; on the other hand, the alloy body is led into the heat exchanging chamber with the temperature of 150-300 DEG C, so that the temperature of the alloy body is rapidly reduced and the spherical powder is formed, and particle sizes are uniformly distributed; the preparation method is simple to operate and automatic control is easy to realize, so that the preparation method can be popularized and used in a large scale.

Description

technical field [0001] The invention relates to a preparation method of titanium alloy powder, in particular to a preparation method of fine spherical titanium alloy powder. Background technique [0002] Due to its low density, high specific strength, good corrosion resistance, excellent heat resistance and a series of excellent properties, titanium alloys are widely used in aviation, aerospace, marine engineering, automobile industry, bioengineering and other fields; but due to its poor processing performance The disadvantages such as difficulty in manufacturing products with complex shapes and high cost greatly limit the application of titanium alloys. [0003] Micro-spherical titanium alloy powder shows unique advantages in chemical activity, mechanical properties, fluidity, bulk density, etc. It is widely used in laser rapid prototyping, powder metallurgy, surface engineering and other fields, and is an important basic industrial raw material; Especially with the rapid...

Claims

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Application Information

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IPC IPC(8): B22F9/06
Inventor 方鹏
Owner SUZHOU ZHIYAN NEW MATERIAL TECH CO LTD
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