Preparation method of fine particle size and low oxygen spherical titanium and titanium alloy powder

A technology of titanium alloy and fine particle size, which is applied in the field of preparation of fine particle size low-oxygen spherical titanium and titanium alloy powder, can solve the problems of unavailable, high centrifugal force, high cost, etc., and achieve strong process operability and short process flow , The effect of high powder yield

Active Publication Date: 2015-01-28
陕西维克德科技开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the rotation speed of the current bar is generally within 20,000 rpm, it cannot provide a higher centrifugal force for the dispersion and atomization of metal droplets. Therefore, most of the titanium and titanium alloy powders prepared by this technology now have a particle size of They are all between 100-250μm, and there are almost no powders ≤45μm
For the inert gas atomization technology, because titanium and titanium alloys are extremely active during the high-temperature melting process, most of the raw materials for melting titanium and titaniu...

Method used

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  • Preparation method of fine particle size and low oxygen spherical titanium and titanium alloy powder
  • Preparation method of fine particle size and low oxygen spherical titanium and titanium alloy powder

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Embodiment 1

[0021] Embodiment 1: The preparation method of the fine particle size spherical pure titanium powder of the present embodiment comprises the following steps:

[0022] 1. Using pure titanium ingots with high cleanliness to prepare 2mm diameter pure titanium coils by machining;

[0023] 2. Remove the oxide skin or impurities on the surface of the pure titanium wire by chemical pickling, clean and decontaminate and dry with alcohol;

[0024] 3. Put two discs of pure titanium wire into the wire feeding mechanism of the arc spray gun, and connect them to the positive and negative poles of the power supply respectively;

[0025] 4. Vacuum the atomization tower to 2×10 -3 Pa, and then filled with 0.4MPa high-purity argon.

[0026] 5. Turn on the power supply of the arc spray gun, adjust the arc current to 175A, feed two disks of pure titanium wire through the wire feeding mechanism and make them contact to generate arc melting, and the gas path is located 15mm directly above the ti...

Embodiment 2

[0028] Embodiment 2: the preparation method of the fine-grained spherical Ti6Al4V alloy powder of the present embodiment comprises the following steps

[0029] 1. Using Ti6Al4V alloy ingot with high cleanliness to prepare 2mm diameter Ti6Al4V alloy wire by machining;

[0030] 2. Remove scale or impurities on the surface of Ti6Al4V alloy wire by chemical pickling, clean and decontaminate with alcohol and dry;

[0031] 3. Put two discs of Ti6Al4V alloy wire into the wire feeding mechanism of the arc spray gun, and connect them to the positive and negative poles of the power supply respectively;

[0032] 4. Vacuum the atomization tower to 2×10 -3 Pa, and then filled with 0.4Mpa high-purity helium.

[0033] 5. Turn on the power supply of the arc spray gun, adjust the arc current to 170A, send the two disks of Ti6Al4V alloy wire into contact through the wire feeding mechanism to generate arc melting, and set the air path at 15mm directly above the Ti6Al4V alloy droplet to set the...

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Abstract

The invention provides a preparation method of fine particle size and low oxygen spherical titanium and titanium alloy powder. The preparation method comprises the following steps: forming molten titanium and titanium alloy liquid drops by adopting arc melting wires, then crushing the metal liquid drops into superfine fog drops by using supersonic speed airflows, and condensing the metal fog drops into the spherical titanium and titanium alloy powder under the surface tension effect of the fog drops. By adopting the arc melting wires, the spherical titanium and titanium alloy powder is prepared in a high-purity argon or helium spray atomization technology, so that the preparation method is short in technological process and low in energy consumption; moreover, the powder preparation process of melting and atomizing raw materials is carried out under the protection of an inert atmosphere, so that the high-activity titanium and titanium alloy powder can be effectively prevented from being polluted, and low oxygen and high purity of the prepared powder are guaranteed; in addition, the molten titanium and titanium alloy liquid drops are sufficiently atomized through three paths of supersonic speed airflows, so that the prepared powder is fine in particle size and higher in yield and has a higher practical value.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy preparation, and in particular relates to a preparation method of fine-grained low-oxygen spherical titanium and titanium alloy powder. Background technique [0002] Powder metallurgy is a near-net-shaping technology that directly forms powders to produce complex-shaped parts. Powder metallurgy technology has the advantages of short process flow, high material utilization rate, fine and uniform structure, and isotropy. It is an ideal process for preparing high-performance, low-cost titanium and titanium alloys. In recent years, the further development and development of emerging manufacturing and processing technologies such as injection molding and additive manufacturing of titanium and titanium alloys have also promoted the further expansion of the application fields of powder metallurgy titanium and titanium alloys. Among them, high-quality low-oxygen spherical titanium and titanium ...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 冯磊
Owner 陕西维克德科技开发有限公司
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