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Method for preparing titanium alloy spherical powder at all levels

A spherical powder and titanium alloy technology, which is applied in the field of powder metallurgy industry, can solve the problems of poor sphericity of titanium alloy powder, decline in the quality of spherical powder, and easy introduction of impurity elements, etc., to achieve good sphericity, improve elongation, and fluidity Good results

Active Publication Date: 2014-05-14
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing spherical titanium alloy powder at various levels, which solves the problem that the titanium alloy powder prepared by the plasma rotating electrode method has poor sphericity, inconsistent particle size and easy introduction of impurity elements in the later screening process, resulting in The problem of declining quality of spherical powder

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  • Method for preparing titanium alloy spherical powder at all levels

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preparation example Construction

[0020] The preparation method of titanium alloy spherical powder at various levels of the present invention is specifically implemented according to the following steps:

[0021] Step 1, use titanium alloy as raw material to make a cylindrical electrode rod, the diameter of the cylindrical electrode rod is Ф = 75mm ~ 80mm, and the length L = 700mm, and then install the cylindrical electrode rod horizontally in the vacuum furnace of the plasma rotary electrode powder making equipment side;

[0022] Step 2, install the plasma gun horizontally on the other side of the vacuum furnace through the plasma gun feeding mechanism, and make the plasma gun coaxial with the cylindrical electrode rod;

[0023] Step 3, vacuumize the vacuum furnace and fill it with mixed gas (the mixed gas is a mixture of helium and argon with a mass ratio of 3:1), then start the plasma gun to generate an arc, and at the same time start the electrode rotation mechanism to make the metal electrode Rotating at...

Embodiment 1

[0032] Step 1. Use titanium alloy as raw material to make a cylindrical electrode rod. The diameter of the cylindrical electrode rod is Ф=75mm and the length L=700mm. Then install the cylindrical electrode rod horizontally on one side of the vacuum furnace of the plasma rotary electrode powder making equipment. ;

[0033] Step 2, install the plasma gun horizontally on the other side of the vacuum furnace through the plasma gun feeding mechanism, and make the plasma gun coaxial with the cylindrical electrode rod;

[0034] Step 3, vacuumize the vacuum furnace and fill it with mixed gas (the mixed gas is a mixture of helium and argon with a mass ratio of 3:1), then start the plasma gun to generate an arc, and at the same time start the electrode rotation mechanism to make the metal electrode Rotating at a high speed with a speed of 25,000 rpm, the high temperature generated by the arc gradually melts the end of the cylindrical electrode rod, and the molten metal droplets are thro...

Embodiment 2

[0038] Step 1. Use titanium alloy as raw material to make a cylindrical electrode rod. The diameter of the cylindrical electrode rod is Ф=78mm and the length L=700mm. Then install the cylindrical electrode rod horizontally on one side of the vacuum furnace of the plasma rotary electrode powder making equipment ;

[0039] Step 2, install the plasma gun horizontally on the other side of the vacuum furnace through the plasma gun feeding mechanism, and make the plasma gun coaxial with the cylindrical electrode rod;

[0040] Step 3, vacuumize the vacuum furnace and fill it with mixed gas (the mixed gas is a mixture of helium and argon with a mass ratio of 3:1), then start the plasma gun to generate an arc, and at the same time start the electrode rotation mechanism to make the metal electrode Rotating at a high speed with a speed of 28,000 rpm, the high temperature generated by the arc gradually melts the end of the cylindrical electrode rod, and the molten metal droplets are throw...

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Abstract

The invention provides a method for preparing titanium alloy spherical powder at all levels. The method comprises the steps that cylinder electrode bars are made of titanium alloy; the cylinder electrode bars are made into powder through a plasma rotating electrode powder manufacturing device, low-temperature argon is blown into a vacuum furnace in the process of condensation and flying of the powder, the powder is cooled rapidly and solidified so that the temperature of the powder can be lowered to the room temperature rapidly, and therefore titanium alloy powder is obtained; the titanium alloy powder is screened through a powder screening device, and then the all levels of titanium alloy spherical powder with the granularity ranging from 40 micrometers to 200 micrometers can be obtained. According to the method for preparing the titanium alloy spherical powder at all levels, the powder is prepared through the plasma rotating electrode powder manufacturing device, and the low-temperature argon is blown into the powder in the process of condensation and flying of the powder so that the powder can be cooled rapidly and solidified and the temperature of the powder can be lowered to the room temperature; as a result, the titanium alloy spherical powder which is identical in particular size, good in sphericity degree, smooth in surface, free of cracks and good in mobility is obtained; in the process of screening, inert gas shielding is adopted, the content of impurity elements including O, H and N in the titanium alloy spherical powder is smaller than 1000 ppm, as a result, the ductility of a powder sintered metal product is effectively improved, and the compression performance and the sintering character of the powder are improved.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy industry, and relates to a method for preparing spherical titanium alloy powder at various levels. Background technique [0002] Obtaining high-quality and low-cost titanium alloy spherical powder at all levels is a key link to meet special forming processes such as hot isostatic pressing and to prepare high-performance titanium alloy components. At present, the inert gas atomization method and the plasma rotating electrode method are the two most widely used advanced technologies for preparing high-quality titanium alloy spherical powder. The preparation of spherical powder by the gas atomization method inevitably produces some hollow powder, and this internal void cannot be removed in the subsequent preparation of titanium alloy materials by powder metallurgy, thus forming internal defects in the material. The plasma rotating electrode method has high powder production efficiency and ...

Claims

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Application Information

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IPC IPC(8): B22F9/10
Inventor 曾光韩志宇陈小林梁书锦张鹏张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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