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Method for preparing spherical 3D printing powder by utilizing plasma

A printing powder, plasma technology, applied in metal processing equipment, transportation and packaging, additive processing, etc., can solve the problem of high price, achieve the effect of low cost, no dust pollution, and reduce the preparation cost

Pending Publication Date: 2018-07-06
江民德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the high-quality 3D printing powder mainly depends on imports (mainly 3D printing powder produced in Germany using the gas spray method), and the price is expensive, about 5000-6000 yuan per kilogram

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In the embodiment of the present invention, a method of using plasma to prepare spherical 3D printing powder uses pre-alloyed powder (titanium vanadium aluminum alloy) or metal powder (titanium powder) as raw material, and plasma prepares spherical 3D printing powder. The specific preparation steps are: feed the pre-alloyed powder or metal powder into the plasma flame, the feeding amount is 10-50g / min, control the power of the plasma at 15kW; the plasma gas is argon, and the flow rate is 2.5m 3 / h; through the high temperature of 10000-30000 ℃ of plasma flame, the pre-alloyed powder or metal powder is melted into droplets (the instantaneous processing time is about 0.01-0.1s), and the molten droplets form balls under the action of surface tension, spherical droplets Under the action of gravity, it will drop to the argon gas with powder feeding (the flow rate is 0.65m 3 / h) in the stainless steel barrel, the powder-feeding argon gas fed into the cooling device can well r...

Embodiment 2

[0055] In the embodiment of the present invention, a method of using plasma to prepare spherical 3D printing powder uses cobalt-chromium-tungsten pre-alloyed powder as raw material, and plasma prepares 3D printing powder. The specific preparation steps are: pre-alloyed cobalt-chromium-tungsten The powder is sent into the plasma flame, the feeding amount is 15g / min, and the power of the plasma is controlled at 20kW; the ion gas is argon, and the flow rate is 2-3m 3 / h; through the high temperature of 10000-30000 ℃ of plasma flame, cobalt-chromium-tungsten pre-alloy powder is melted into droplets (instantaneous processing time is about 0.01-0.1s), and the molten droplets form balls under the action of surface tension, spherical droplets Under the action of gravity, it is dropped into a stainless steel bucket filled with pure water, and then filtered, dried and heat-treated to obtain a spherical 3D printed cobalt-chromium-tungsten powder with a probability of forming a ball of mor...

Embodiment 3

[0058] In the embodiment of the present invention, a method of using plasma to prepare spherical 3D printing powder uses titanium powder as a raw material to prepare 3D printing powder with plasma. The specific preparation steps are: feeding titanium powder into a plasma flame, feeding The volume is 18g / min, the power of the control plasma is 15-20kW; the ion gas is argon, and the flow rate is 2.3m 3 / h; through the high temperature of 10000-30000 ℃ (preferably 15000 ℃) of the plasma flame, the titanium powder is melted into droplets (the instantaneous processing time is about 0.01-0.1s), and the molten droplets form balls under the action of surface tension, and the spherical liquid The drops fall into a stainless steel bucket filled with pure water under the action of gravity, and then filter, dry and heat-treat to obtain a spherical 3D printing titanium powder with a ball forming probability of more than 95%.

[0059] The 3D printing powder prepared in this example is spher...

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Abstract

The invention discloses a method for preparing spherical 3D printing powder by utilizing plasma. According to the method for preparing the spherical 3D printing powder by utilizing the plasma, multiple procedures including refining, deoxygenization, slag making, slag fishing treatment, ball forming through air blowing, atomization and the like are not required to be used for preparation, and the prepared spherical 3D printing powder is smooth in surface, uniform in distribution, free of pollution, large in loose weight and good in liquidity, and is a relatively excellent form at present; the plasma is utilized to prepare the 3D printing powder, so that simple and rapid preparation of the 3D printing powder is achieved, the process is simple, no dust or pollution exists, and furthermore, the prepared 3D printing powder is spherical in surface, good in liquidity, low in cost and worthy of being widely popularized; and the prepared 3D printing powder is subjected to quenching treatment byusing water, so that the balling probability of the prepared 3D printing powder is greatly improved, and meanwhile, water cooling greatly reduces the preparation cost and improves working efficiencyfor the preparation process, and is especially suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of a method for preparing 3D printing powder, in particular to a method for preparing spherical 3D printing powder by using plasma. Background technique [0002] At present, spherical powder with very good fluidity is generally required when using 3D printing powder at home and abroad. This is because non-spherical ordinary powder particles have complex shapes, poor flow, and uneven powder feeding, resulting in uneven quality of printed products. Although the gas spray method is mainly used to prepare such spherical powders at present, the process is complicated, the production cost is high, and the scope of application is limited (only suitable for materials with a melting point below 2000 ° C). [0003] Today's 3D printing technology is widely used in various fields, and high-quality 3D printing powder has become a hot and important resource. At present, most of the high-quality 3D printing powder mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C04B35/626B33Y70/00B22F1/065
CPCC04B35/62665C04B35/62695B22F9/08B22F9/14B22F1/065B33Y70/10
Inventor 江民德
Owner 江民德
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