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Liquid-solid fluidization shaping method for low-cost titanium powder for 3D printing

A 3D printing, low-cost technology, which is applied in the field of liquid-solid fluidization shaping of low-cost titanium powder for 3D printing, can solve the problems of complex process, high cost, and high requirements for spherical titanium powder production equipment, and achieve simple equipment and low cost. The effect of low cost, simple equipment and process

Pending Publication Date: 2019-12-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-cost method for preparing titanium powder with good fluidity, which can meet the requirements of powder metallurgy processes such as 3D printing and injection molding, and solve the problems of high production equipment requirements, complicated process, and high cost of spherical titanium powder.

Method used

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  • Liquid-solid fluidization shaping method for low-cost titanium powder for 3D printing
  • Liquid-solid fluidization shaping method for low-cost titanium powder for 3D printing
  • Liquid-solid fluidization shaping method for low-cost titanium powder for 3D printing

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh 300g irregular hydrogenated dehydrogenation titanium powder (microscopic appearance such as figure 2 Shown), added to the stirring container, and then added 200ml of deionized water and titanium powder to mix evenly, in order to prevent the titanium powder from being oxidized in contact with air. Set the rotation speed to 30,000 rpm, liquid-solid fluidization shaping for 1.5min, and let it cool naturally for 10min after shutting down, then add the titanium powder mixture into the Buchner funnel to filter, and then take the filtered titanium powder in a vacuum drying oven at 70°C Dry for 5 hours and take the powder for vacuum packaging. The titanium powder after liquid-solid fluidization shaping is carried out microscopic appearance observation (see image 3 ) and fluidity, oxygen content test. Among them, the Hall flow meter is used to test the powder fluidity, and the inert gas pulse infrared thermal conductivity method is used to test the powder oxygen conten...

Embodiment 2

[0023] Weigh 300g irregular hydrogenated dehydrogenation titanium powder (microscopic appearance such as figure 2 Shown), added to the stirring container, and then added 200ml of deionized water and titanium powder to mix evenly, in order to prevent the titanium powder from being oxidized in contact with air. Set the rotation speed to 30,000 rpm, liquid-solid fluidization shaping for 5 minutes, let it cool naturally for 10 minutes after shutting down, add the titanium powder mixture into the Buchner funnel to filter, and then take the filtered titanium powder and dry it in a vacuum drying oven at 70°C Dry for 5 hours and take the powder for vacuum packaging. The liquid-solid fluidized titanium powder was subjected to microscopic observation, fluidity and oxygen content test. Among them, the Hall flow meter is used to test the powder popularity and fluidity test. The Hall flow meter is used to test the powder oxygen content by the inert gas pulse infrared thermal conductivity...

Embodiment 3

[0025] Weigh 500g irregular hydrogenated dehydrogenation titanium powder (microscopic appearance such as figure 2 Shown), added to the stirring container, and then added 200ml of deionized water and titanium powder to mix evenly, in order to prevent the titanium powder from being oxidized in contact with air. Set the rotation speed to 30,000 rpm, liquid-solid fluidization shaping for 15 minutes, let it cool naturally for 10 minutes after shutting down, add the titanium powder mixture into the Buchner funnel to filter, and then take the filtered titanium powder and dry it in a vacuum drying oven at 70°C Dry for 5 hours and take the powder for vacuum packaging. The liquid-solid fluidized titanium powder was subjected to microscopic observation, fluidity and oxygen content test. Among them, the Hall flow meter is used to test the powder popularity and fluidity test. The Hall flow meter is used to test the powder oxygen content by the inert gas pulse infrared thermal conductivit...

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Abstract

The invention provides a liquid-solid fluidization shaping method for low-cost titanium powder for 3D printing, and belongs to the technical field of powder metallurgy and preparation. The method comprises the following steps: using hydrogenated dehydrogenated titanium powder as a raw material, adding deionized water and titanium powder to mix, and stirring the deionized water to make the titaniumpowder move in a fluid state in the deionized water at a fluidization speed of 3,000 rpm, wherein the liquid-solid fluidization time is 1.5-15 min. In the process of liquid-solid fluidization, irregular titanium powder collides and rubs against each other to achieve the purposes of removing irregular powder edges and improving the smoothness of the powder, so that the fluidity of the powder is improved, and the requirements of powder metallurgy processes such as 3D printing and injection molding are achieved. The method has the advantages of low cost, simple equipment and technology, high efficiency, controllable impurity content, and obvious improvement effect of powder liquidity.

Description

technical field [0001] The invention belongs to the technical field of metal powder metallurgy preparation, and provides a liquid-solid fluidization shaping method of low-cost titanium powder for 3D printing. Background technique [0002] Titanium and titanium alloys have excellent comprehensive properties such as high specific strength and good corrosion resistance, and are widely used in aerospace, shipbuilding, biomedical and other fields. In recent years, with the rapid development of powder metallurgy processes such as 3D printing and injection molding of titanium and titanium alloys, the research on titanium raw materials for powder metallurgy has attracted the attention of many researchers. Since powder metallurgy processes such as 3D printing and injection molding have high requirements on the fluidity and impurity content of titanium raw materials, the fluidity of the powder determines the powder spreading effect in the 3D printing process and the powder loading rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105B33Y40/00B33Y70/00
CPCB33Y40/00B33Y70/00B22F10/00B22F1/14B22F10/20Y02P10/25
Inventor 陈刚秦明礼丁旺旺曲选辉
Owner UNIV OF SCI & TECH BEIJING
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