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A device and method for continuously producing metal powder by multi-electrode plasma arc

A plasma arc and metal powder technology, which is applied in the field of high melting point refractory metals and multi-element alloyed powders, achieves the effects of uniform particle size distribution, good powder roundness, and reduced powder manufacturing costs

Active Publication Date: 2017-02-08
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Subsequent powder recycling packaging

Method used

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  • A device and method for continuously producing metal powder by multi-electrode plasma arc
  • A device and method for continuously producing metal powder by multi-electrode plasma arc
  • A device and method for continuously producing metal powder by multi-electrode plasma arc

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Experimental program
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Effect test

Embodiment 1

[0041] Such as Figure 5-7 As shown, 1. During production, first fill inert gas at the protective gas inlet 4, empty the air inside the nozzle 1 of the expansion chamber, and then start the plasma arc generator electrode 3. The plasma arc generator electrode 3 is a non-transferred arc, a total of three groups , wherein the angle between the two groups of electrodes below is 115°, and the angle between the other two groups is 122.5°. Generally, the adjustable output current range is 20 amperes, and the temperature of plasma arc generator electrode 3 is 8000°C; the outlet angle of nozzle 1 in the expansion chamber is 5°, the inner diameter of the outlet end section D 1 At 15 mm, the arc radius r is at 10 mm, and the middle section of the outlet is D 2 At 10 mm, the arc radius R is at 50 mm, and the front section of the exit is D 3 At 100mm, the total nozzle length is at 180mm.

[0042] 2. After completing step 1, start the moving flange 9' and the raw material rod clamp 7' of...

Embodiment 2

[0052] Such as Figure 5-7 As shown, 1. During production, first fill inert gas at the inlet of the protective gas, empty the air inside the nozzle of the expansion chamber, and then start the electrodes of the plasma arc generator. The electrodes of the plasma arc generator are three groups of non-transferred arcs, and the included angle is 120°, the general adjustable output current range is 100 amperes, the electrode temperature of the plasma arc generator is 13000°C; the outlet angle of the expansion chamber nozzle is 75°, and the inner diameter of the end section of the outlet is D 1 At 190 mm, the arc radius r is at 130 mm, and the middle section of the outlet is D 2 At 50 mm, the arc radius R is at 350 mm, and the front section of the exit is D 3 At 900 mm, the total nozzle length is at 1500 mm.

[0053] 2. After completing step 1, start the moving flange of the second set of propellers of the feeding device and the raw material rod clamp. The raw material rod clamp c...

Embodiment 3

[0062] Such as Figure 5-7 As shown, 1. During production, first fill inert gas at the inlet of the protective gas, empty the air inside the nozzle of the expansion chamber, and then start the electrodes of the plasma arc generator. The electrodes of the plasma arc generator are non-transferred arcs in three groups, of which the following two The included angle of the electrodes is 115°, and the mutual included angle of the other two groups is 122.5°. Generally, the adjustable output current range is 300 amperes, and the electrode temperature of the plasma arc generator is 30,000°C; the outlet angle of the expansion chamber nozzle is 45°, and the inner diameter of the end section of the outlet D. 1 At 100 mm, the arc radius r is at 100 mm, and the middle section of the outlet is D 2 At 30 mm, the arc radius R is at 150 mm, and the front section of the exit is D 3 At 250mm, the total nozzle length is at 500mm.

[0063] 2. After completing step 1, start the moving flange of t...

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Abstract

The invention relates to a device and method for continuously manufacturing metal powder through multi-electrode plasma arcs. The device and method are characterized in that raw material rods enter a plasma arc generator electrode inner cavity of a heating area through a feeding opening in a feeding device; three electrodes of the plasma arcs are used for evaporating the metal raw material rods into fogging plasma bodies, namely, rods, wires or ceramic rods with the same powder materials are manufactured, wherein the raw material rods are located in the center, and the arcs are located on the periphery; and inert gas flow is used for blowing fogging metal fog into a collecting device, and the fogging metal fog is rapidly cooled and solidifies into powder along with rapid reduction of the temperature and the air pressure. Convenience is brought to mechanized production, and the powder manufacturing cost is greatly reduced. Through adjustment of parameters such as the plasma arc output heat and the protection gas pressure, the powder granularity can range from 0.1 micrometer to 100 micrometers. One-time molding of powder manufacturing is achieved.

Description

technical field [0001] The invention relates to a device and method for continuously manufacturing metal powder by a multi-electrode plasma arc, which is used for the manufacturing method of metal and ceramic powder used in additive manufacturing technology (3D printing), especially refractory metal with high melting point and multi-element alloying powder body. Background technique [0002] With the rapid rise of additive manufacturing technology (3D printing), it has broad application prospects in the fields of aerospace, aviation and energy. In the manufacture of complex structural parts and gradient materials, it has incomparable advantages over traditional manufacturing methods. Among them, the powder materials used in additive manufacturing are the key to the application of this technology. [0003] At present, the materials used in additive manufacturing technology are mainly concentrated in: titanium-nickel alloy, steel, ceramics, magnesium-aluminum alloy, and rare ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14
Inventor 刘耀东张爽冉旭
Owner CHANGCHUN UNIV OF TECH
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