Device and method for preparing metal spherical powder by utilizing metal wire material
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A spherical powder and metal powder technology, which is applied in the field of metal spherical powder preparation, can solve the problems of large particle size of spherical powder, multi-sphericity of hollow spheres, etc., and achieve the effect of less satellite spheres, high solid rate and high powder making efficiency
Inactive Publication Date: 2018-10-12
王海军
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[0014] The second object of the present invention is to overcome the defects of large particle size, many hollow spheres and poor sphericity in the preparation of spherical powder in the prior art, and provide a kind of spherical powder with small particle size that can be obtained efficiently, with fewer hollow spheres and high sphericity Method for preparing metal spherical powder using metal wire
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Embodiment 1
[0075] Embodiment one (adopting argon alone as working gas)
[0076] The plasma torch adopts high-energy supersonic plasma torch (spray gun), and uses metal titanium wire to prepare metal titanium spherical powder. The specific working parameters are as follows:
[0077] Distance between metal titanium wire and nozzle: 5mm,
[0078] Argon flow: 120L / min,
[0079] Non-transferred arc current: 80A,
[0080] Transfer arc current: 400A,
[0081] Working voltage: 130V,
[0082] Titanium wire diameter: 2mm,
[0083] The minimum negative pressure in the powder making kettle: 10mba,
[0084] The maximum positive pressure of the powder making kettle during work: 0.15MPa;
[0085] Control the wire feeding speed of the metal wire to meet:
[0086]
[0087] In the titanium spherical powder obtained in Example 1, the proportion of spherical powder with a small particle size of 15-53 μm is more than 50%; the spherical powder is basically solid, and there are few satellites; the mi...
Embodiment 2
[0088] Embodiment two (adopting the mixed gas of argon and helium as working gas)
[0089] The plasma torch adopts high-energy supersonic plasma torch (spray gun), and uses metal titanium wire to prepare metal titanium spherical powder. The specific working parameters are as follows:
[0090] Distance between metal titanium wire and nozzle: 6mm,
[0091] Main gas (argon) flow rate: 140L / min,
[0092] Secondary gas (helium) flow rate: 20L / min
[0093] Non-transferred arc current: 80A,
[0094] Transfer arc current: 400A,
[0095] Working voltage: 140V,
[0096] Titanium wire diameter: 3mm,
[0097] Wire feeding speed: 6.5m / min
[0098] The minimum negative pressure in the powder making kettle: 10mba,
[0099] The maximum positive pressure of the powder making kettle during work: 0.15MPa;
[0100]In the titanium spherical powder obtained in Example 2, the proportion of spherical powder with a small particle size of 15-53 μm is more than 50%; the spherical powder is basic...
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Abstract
The invention discloses a device for preparing metal spherical powder by utilizing a metal wire material. The device comprises a powder making kettle, a plasma torch, a nozzle, a wire feeder and a powder containing pot, wherein the front end of plasma torch is inserted into the powder making kettle, the nozzle is arranged at the front end of the plasma torch, an air inlet hole is formed in the nozzle in the axial direction, the wire feeder is provided with a wire feeding joint, furthermore, the metal wire material is conveyed to the front end of the nozzle through the wire feeding joint, and the powder containing pot is arranged at the bottom of the powder making kettle and is used for collecting spherical metal powder generated in the powder making kettle. The invention further disclosesa method for preparing the metal spherical powder by utilizing the metal wire material. The method is characterized in that the transition arc plasma torch is adopted to prepare the spherical metal powder by utilizing the metal wire material, and relatively good preparation effects are obtained through adjustment of relevant parameters including the argon flow, the transfer arc current, the wire feeding speed and the like in the preparation process. According to the device and method for preparing the metal spherical powder by utilizing the metal wire material, the spherical powder with the relatively small grain diameter can be obtained in a high-efficiency manner, the obtained metal powder has relative few hollow spheres, and the spherical degree is high.
Description
technical field [0001] The invention belongs to the technical field of preparation methods of metal spherical powders, and in particular relates to a device and method for preparing metal spherical powders by using metal wires. Background technique [0002] With the development of science and technology, the application of metal 3D printing technology is becoming more and more extensive. Some large-scale titanium alloy special-shaped structural parts such as aircraft keels can only be manufactured using 3D printing technology. High-purity and small particle size (15-53 μm) spherical titanium powder is the raw material for 3D printing, and the powder properties have an important impact on product quality. In addition, the performance of titanium powder is the key factor to determine the quality of titanium and titanium alloy powder metallurgy products. The preparation of titanium coating by thermal spraying is an effective way to solve the anti-corrosion of marine equipment,...
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