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Device and method for preparing high-melting-point alloy powder through electric arc

An alloy powder, high melting point technology, used in transportation and packaging, metal processing equipment, additive processing, etc., can solve problems such as high melting temperature, and achieve high milling efficiency, easy implementation, and flexible powder types.

Active Publication Date: 2021-07-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the current atomization powder production methods that atomization powder production requires a very high melting temperature, and the temperature that can be reached by general equipment does not exceed 1600 degrees Celsius. If high melting point materials are required for powder production, no matter in terms of equipment or cost there are challenges
Many other powder-making methods also need to achieve uniform smelting of the prepared alloy materials. For materials with high melting points, how to smelt them into uniform and large-scale materials without segregation is also a difficult problem.

Method used

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  • Device and method for preparing high-melting-point alloy powder through electric arc
  • Device and method for preparing high-melting-point alloy powder through electric arc
  • Device and method for preparing high-melting-point alloy powder through electric arc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 As shown, a device for preparing high melting point alloy powder by electric arc includes: collector 7, melting pole 2, non-melting pole 3, both melting pole 2 and non-melting pole 3 are inserted into the opening of collector 7; collector 7 is a container structure, wherein a protective medium is provided, and the protective medium is selected from one or both of inert gas or liquid nitrogen;

[0052] The melting electrode 2 is provided with a wire material 11, and the non-melting electrode 3 is provided with a tungsten electrode 4; the metal wire material 11 is connected to the positive pole of the arc generating power supply 1, and the tungsten electrode 4 is connected to the negative pole of the arc generating power supply 1, and the arc is formed on the wire material. Arcing between 11 and tungsten electrode 4;

[0053] The melting electrode 2 is provided with a coaxial shielding gas; the non-melting electrode 3 is provided with a coaxial shielding...

Embodiment 2

[0057] Adopt the device described in embodiment 1 to prepare the stainless steel powder of laser additive manufacturing:

[0058] The welding wire adopts ER308 stainless steel welding wire with a diameter of 1.2mm, and liquid nitrogen is filled into the collector for collecting the molten droplets;

[0059] The ER308 stainless steel welding wire in the melting pole is connected to the positive pole of the arc generator power supply, and the tungsten pole in the non-melting pole is connected to the negative pole of the arc generator power supply, so that the arc starts and burns stably between the ER308 stainless steel welding wire and the tungsten pole; at a current of 300A At that time, the argon gas flow rate of the ER308 stainless steel welding wire coaxial gas protection is 15L / min, the argon gas flow rate of the non-melting electrode is 15L / min, and the gas flow rate of the bypass side blowing atomization nozzle is 30L / min, and the formed droplets are directly Spray into ...

Embodiment 3

[0062] Adopt the device described in embodiment 1 to prepare iron-based amorphous powder:

[0063] The welding wire is a flux-cored welding wire made by drawing high-purity iron sheet wrapped metal powder, and the nominal composition of the welding wire is Fe 67 Cu 2 Nb 3 Si 19 B 9 , the diameter of the welding wire is 2.0mm; the powder collector for collecting powder is filled with liquid nitrogen;

[0064] The flux-cored wire in the melting pole is connected to the positive pole of the arc generator, and the tungsten pole in the non-melting pole is connected to the negative pole of the welding power supply, so that the arc starts between the flux-cored wire and the tungsten pole and burns stably; when the current is 350A , the flux-cored wire coaxial shielded argon gas flow rate is 15L / min, the argon gas flow rate of the non-melting electrode is 15L / min, and the argon gas flow rate of the bypass side-blown atomizing nozzle is 30L / min, the formed droplets Spray directly ...

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Abstract

The invention relates to the technical field of preparation of alloy powder, in particular to a device and method for preparing high-melting-point alloy powder through a high-temperature electric arc. The device comprises a powder collecting device, a consumable electrode and a non-consumable electrode, wherein the consumable electrode and the non-consumable electrode are used for generating electric arcs and are both inserted into an opening of the collecting device, a metal wire passes through the consumable electrode, a tungsten electrode is arranged in the non-consumable electrode, the metal wire passing through the consumable electrode is connected to a positive electrode of an arc generating power supply, a tungsten electrode is connected to a negative electrode of the arc generating power supply, an arc arches between the metal wire and the tungsten electrode, an atomizing spray pipe is arranged on one side of the electric arc, high-speed gas sprayed out of the atomizing spray pipe is directly sprayed to molten drops formed by combustion of the electric arc, bypass side blowing is carried out, the molten drops are further finely atomized, and a wire feeding device is used for conveying metal wires into the consumable electrode. The alloy powder prepared by the preparation method can meet the shape requirement of spherical powder, the particle size distribution of the powder is adjusted according to the current, the powder making efficiency is high, and the types of the prepared powder are flexible.

Description

technical field [0001] The invention relates to the technical field of alloy powder preparation, in particular to a device and method for preparing high melting point alloy powder by electric arc. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of additive manufacturing, there is an increasing demand for various alloy powders. Generally speaking, there are four methods for preparing alloy powders at home and abroad, namely atomization, electrolytic deposition, chemical reduction, and mechanical crushing. Among them, the atomization method has become the mainstream method for preparing powders for additive manufacturing because it can obtain spherical ...

Claims

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Application Information

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IPC IPC(8): B22F9/14B22F1/00B33Y70/00
CPCB22F9/14B33Y70/00B22F2304/10B22F1/065Y02P10/25
Inventor 邹勇吴东亭张永昂种凯高昱张硕
Owner SHANDONG UNIV
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