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Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization

A 3D printing and gas atomization technology, which is applied in the field of powder metallurgy and atomization to prepare titanium or titanium alloy powder. Production efficiency issues, heat loss reduction, and the effect of high production efficiency

Active Publication Date: 2018-04-13
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the atomization method is unrestricted atomization, the distance between the atomization airflow from the nozzle to the effective atomization area is too long, the energy loss of the airflow is large, and the cost is increased
And the atomization effect is not good, the powder particle size is 30-100μm, and the yield of fine powder is low
To sum up, the spherical titanium or titanium alloy powder obtained by the various preparation methods currently disclosed has the problems of poor sphericity, coarse powder particle size, uneven particle size distribution, and low yield of fine powder.

Method used

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  • Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization
  • Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization
  • Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization

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Experimental program
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Effect test

Embodiment 1

[0045] Select commercially pure titanium (CP-Ti) wire with a diameter of 3 mm as the wire material, and turn on the titanium and titanium alloy wire feeding equipment at a feeding speed of 20 mm / s. Set the main atomizing airflow nozzle of the spray pan and the auxiliary protective airflow nozzle of the spray pan at the same level. First, vacuum the entire set of atomization equipment, and the internal pressure of the equipment is 2.0 × 10 -3 Pa, and then rush into the protective argon gas, the internal pressure of the equipment is 0.04MPa, and then repeat the above operation once. Turn on the cooling water of the electromagnetic shielding ring system, and turn on the cooling water of the high-frequency induction coil system. After the titanium wire enters the high-frequency induction coil, turn on the high-frequency induction power supply. When the superheat of the titanium liquid reaches 300±20k, turn on the atomization spray pan, set the pressure of the main atomization spr...

Embodiment 2

[0047] Titanium alloy (TC4) wire with a diameter of 3 mm was selected as the wire material, and the titanium and titanium alloy wire feeding equipment was turned on at a feeding speed of 20 mm / s. Set the main atomizing airflow nozzle of the spray pan and the auxiliary protective airflow nozzle of the spray pan at the same level. First, vacuum the entire set of atomization equipment, and the internal pressure of the equipment is 2.0×10 -3 Pa, and then rush into the protective argon gas, the internal pressure of the equipment is 0.04MPa, and then repeat the above operation once. Turn on the cooling water of the electromagnetic shielding ring system, and turn on the cooling water of the high-frequency induction coil system. After the titanium wire enters the high-frequency induction coil, turn on the high-frequency induction power supply. When the superheat of the titanium liquid reaches 300±20k, turn on the atomization spray plate. The pressure of the main atomization spray pla...

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Abstract

The invention relates to a device and a method for continuously preparing a titanium or titanium alloy powder for 3D printing through gas atomization. The device comprises an atomization spray disc fixing top plate, an atomization spray disc, an electromagnetic shielding ring and a high-frequency induction coil from top to bottom, wherein the atomization spray disc and the fixing top plate are fixed through a fixing bolt; continuous conveying feeding holes for a titanium or titanium alloy wire material are formed in the central positions of the atomization spray disc fixing top plate and the atomization spray disc; the atomization spray disc and the electromagnetic shielding ring are coaxially installed about the axes of the conveying feeding holes; the atomization spray disc comprises a main atomization gas flow nozzle and auxiliary protection gas flow nozzles; and atomization gas flow sprayed out via the main atomization gas flow nozzle is collected on the wire material to form an atomization centre, and the atomization centre is superposed with a melting centre formed due to the heating of the high-frequency induction coil for the end part of the wire material. Therefore, melting flow is immediately limited and atomized by the main atomization gas flow after being generated, so that a superheating degree is furthest ensured, heat loss is reduced, and a high fine powder yieldof titanium or titanium alloy atomization is realized.

Description

Technical field [0001] The invention belongs to the technical field of powder metallurgy, and particularly relates to the technical field of preparing titanium or titanium alloy powder by an atomization method. Background technique [0002] Titanium or titanium alloy has a series of advantages such as low density, high specific strength, high yield-to-strength ratio, excellent plastic toughness and corrosion resistance, and non-magnetic properties. It is widely used in aviation, aerospace and other military sectors as well as chemical industry, metallurgy, and light industry. , medical and other fields. However, due to the poor thermal conductivity, low plasticity, high hardness and low specific heat of titanium alloys, its forming is difficult, which limits the application of titanium alloys in some fields. The emergence of 3D printing technology has changed the processing of metal materials from subtractive manufacturing to 3D printing, and from traditional casting, rolli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B33Y70/00
CPCB22F9/082B22F2009/0836B22F2009/088B22F2009/0888B33Y70/00
Inventor 张少明贺会军胡强赵新明郑明月刘英杰张金辉朱学新
Owner BEIJING COMPO ADVANCED TECH
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