Water-cooling copper crucible device for atomization powdering

A water-cooled copper crucible and atomization powder-making technology, which is applied in the field of water-cooled copper crucible devices, can solve problems such as low atomization efficiency, clogged leakage, and atomization failure, and achieve the effects of improving smoothness, increasing heat sources, and increasing heat conduction

Pending Publication Date: 2019-02-01
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the diameter of the diversion nozzle is large, the liquid column flowing down will be too thick, and the gas cannot completely crush it; if the diameter of the diversion nozzle is too small, the liquid flow will not flow down smoothly and it will easily block the leakage, resulting in atomization failure and fogging. low chemical efficiency

Method used

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  • Water-cooling copper crucible device for atomization powdering
  • Water-cooling copper crucible device for atomization powdering
  • Water-cooling copper crucible device for atomization powdering

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The product to be prepared in this embodiment is Ti6Al4V spherical powder. combine Figure 4 , the close-coupled gas atomization preparation method of Ti6Al4V spherical powder in this embodiment includes the following steps:

[0039] (1) Turn on the pump and compressor connected to the deionized water tank, the cooling water pressure should be kept between 0.1 and 0.2 MPa, and the outlet water temperature should be ≤20°C. When the deionized water circulates normally, put the Ti6Al4V alloy ingot into the water-cooled copper crucible, and vacuumize and pass in argon gas for gas protection, and the atomization chamber is also evacuated, and then pass in argon gas to make the atomization chamber The pressure is 800Pa;

[0040] (2) Turn on the power and increase the current step by step. When the current value reaches 250A, open the argon valve connected to the tightly coupled nozzle, and adjust the argon pressure of the tightly coupled nozzle 13 to 4Mpa. After waiting for...

Embodiment 2

[0044] The product to be prepared in this embodiment is Ti48Al2Cr2Nb spherical powder. combine Figure 4, the close-coupled gas atomization preparation method of Ti48Al2Cr2Nb spherical powder in this embodiment includes the following steps:

[0045] (1) Turn on the pump and compressor connected to the deionized water tank, the cooling water pressure should be kept between 0.1 and 0.2 MPa, and the outlet water temperature should be ≤20°C. When the deionized water circulates normally, put the Ti48Al2Cr2Nb alloy ingot into the water-cooled copper crucible, and evacuate and pass in argon gas for gas protection, and the atomization chamber is also evacuated, and then pass in argon gas to make the atomization chamber The pressure is 800Pa;

[0046] (2) Turn on the power and increase the current step by step. When the current value reaches 250A, open the argon valve connected to the tightly coupled nozzle, and adjust the argon pressure of the tightly coupled nozzle to 4Mpa. After w...

Embodiment 3

[0050] The product to be prepared in this embodiment is pure Ti spherical powder. combine Figure 4 , the close-coupled gas atomization preparation method of pure Ti spherical powder in this embodiment comprises the following steps:

[0051] (1) Turn on the pump and compressor connected to the deionized water tank, the cooling water pressure should be kept between 0.1 and 0.2 MPa, and the outlet water temperature should be ≤20°C. When the deionized water circulates normally, put the high-purity titanium sponge into the water-cooled copper crucible, and then vacuumize and pass in argon gas for gas protection. The pressure is 800Pa;

[0052] (2) Turn on the power and increase the current step by step. When the current value reaches 250A, open the argon valve connected to the tightly coupled nozzle, and adjust the argon pressure of the tightly coupled nozzle to 4Mpa. After waiting for 5-8s, the current value increases. up to 300~350A;

[0053] (3) When the molten pure Ti allo...

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Abstract

The invention belongs to the technical field of preparation of spherical metal powder through an atomization method, and particularly relates to a water-cooling copper crucible device for atomizationpowdering. The water-cooling copper crucible device is of an integrated structure, and comprises an upper crucible body and a lower leaking column; the crucible body comprises an outer side wall and crucible flaps; the crucible flaps are fixed to the inner side of the outer side wall, and a gap is formed between the crucible flaps and allows a magnetic line to penetrate through; the bottoms of thecrucible flaps are welded to the top end of the leaking column, and the inner diameter of the top end of the leaking column is equal to the minimum diameter of the bottoms of the crucible flaps; andthe upper part of the leaking column is of a design structure with the caliber being decreased stage by stage, and the lower part of the leaking column is of a straight-tube-shaped design structure. Amethod for decreasing the caliber of the leaking column stage by stage is adopted, thus heat conduction of the bottoms of solid materials is improved, the materials can be completely molten and smoothly flow down, the problem that a liquid flow cannot smoothly flow down, and consequently the leaking column is blocked is solved, and the lower part of the leaking column is designed into a straighttube shape, so that the powering effect is improved.

Description

technical field [0001] The invention belongs to the technical field of atomization preparation of spherical metal powder, in particular to a water-cooled copper crucible device for atomization powder production. Background technique [0002] With the development of 3D printing forming technology, the demand for spherical powder in the world has been in short supply, and more attention has been paid to the research and development of its preparation technology. Among them, the spherical powder prepared by the vacuum induction melting atomization method has the advantages of high purity, relatively low cost, low oxygen content, high sphericity, and high yield of fine powder, and is currently one of the most widely used technologies for preparing spherical powder. [0003] In general, the leakage in the crucible used in the vacuum induction melting atomization method is composed of two parts: graphite diversion base and diversion inner core, and the overall structure and materi...

Claims

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Application Information

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IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0888
Inventor 陈光孙预麟李沛潘曦徐东东
Owner NANJING UNIV OF SCI & TECH
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