Preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing

A spherical titanium powder, 3D printing technology, applied in the field of metal powder preparation, can solve the problems of coarse particle size, high cost, wide distribution range, etc., and achieve the effects of high fluidity, high sphericity, and low oxygen content

Active Publication Date: 2015-07-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the morphology of titanium or titanium alloy powder prepared by these methods is difficult to control, and the particle size is relatively coarse and the distribution range is wide.
Among them, due to the low air velocity of the gas atomization method, the yield of the prepared metal or alloy powder with a particle size below 50 μm is usually only about 30%; the cost of electrochemical and reduction methods is high, and the solvents and reducing agents used are mostly Highly toxic and easy to introduce impurities such as halogen and sulfur; ball milling method can only be used for brittle materials, usually with high oxygen content and unable to control the shape of powder particles

Method used

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  • Preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing
  • Preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing
  • Preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing

Examples

Experimental program
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Effect test

example 1

[0017] Example 1. Using the raw material high-purity titanium block (purity 99.99wt%) as the anode, in an inert gas argon environment, a high-intensity arc is formed by discharge, the arcing current is 100A, the arc voltage is 10V, and then hydrogen is introduced , the ratio of hydrogen to inert gas is 1:1, and titanium hydride (TiH 2 ), form solid titanium hydride nanoparticles after condensation, such as figure 1 ; Polyvinyl alcohol, polyethylene glycol, deionized water and titanium hydride nanoparticles were prepared into a suspension liquid slurry, and the centrifugal atomization drying method was used for agglomeration and granulation to obtain 20 μm spherical titanium hydride particles; The tubular furnace heat-treated the granulated titanium hydride powder. The heat treatment temperature of the first stage was 230°C, and the holding time was 120 minutes; the heat treatment temperature of the second stage was 700°C, and the holding time was 180 minutes; the heat treatmen...

example 2

[0018] Example 2. Using the raw material high-purity titanium block (purity 99.99wt%) as the anode, in an inert gas helium environment, a high-intensity arc is formed by discharge, the arc starting current is 250A, the arc voltage is 30V, and then hydrogen is introduced , the ratio of hydrogen to inert gas is 1:3, and titanium hydride (TiH 2 ), solid titanium hydride nanoparticles are formed after condensation, and its micromorphology and particle size distribution are as follows figure 2 ; Polyvinyl alcohol, polyethylene glycol, deionized water and titanium hydride nanoparticles were prepared into a suspension liquid slurry, and the centrifugal atomization drying method was used for agglomeration and granulation to obtain spherical titanium hydride particles of 50 μm; argon-protected The tubular furnace heat-treated the granulated titanium hydride powder. The heat treatment temperature of the first stage was 280°C, and the holding time was 90 minutes; the heat treatment temp...

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Abstract

The invention discloses a preparation method of fine-particle spherical titanium powder for three-dimensional (3D) printing and belongs to the technical field of preparation of metal powder. The method comprises the following steps: firstly, by using a high-purity titanium block material as a raw material, performing arc evaporation under an inert gas environment, and meanwhile, charging hydrogen to synthesize titanium hydride nano powder through a gas-phase reaction; secondly, agglomerating and granulating the titanium hydride nano powder to obtain micron-sized titanium hydride powder with higher density; finally, performing heat treatment on the granulated micron-sized titanium hydride powder, and performing degumming, dehydrogenation and compacted consolidation to obtain pure-titanium powder particles of which the particle size, the sphericity and the fluidity meet a 3D printing requirement. According to the method, the sphericity and the particle size distribution of the titanium powder particles are highly controlled; the process is simple, and the cost is low; metal titanium with great activity is stabilized in a new way of generating oxidation-resistant titanium hydride nano powder particles firstly, and the content of oxygen in the titanium powder particles which are finally prepared can be controlled.

Description

technical field [0001] The invention relates to a method for preparing fine particle spherical titanium powder for 3D printing, belonging to the technical field of metal powder preparation. Background technique [0002] 3D printing technology is especially suitable for the development of high value-added complex structural products, personalized customization and verification of design and R&D before mass production. Compared with the current international advanced level, my country still has a big gap in the research and development of forming materials required for 3D printing. At present, the material design and preparation process mainly follow the foreign progress. In terms of forming material products for 3D printing, the fine-grained spherical titanium and titanium alloy powder needed in China are almost completely dependent on imports. The lack of high-quality forming materials for 3D printing is one of the bottleneck factors restricting the promotion and applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30
Inventor 聂祚仁张亚娟王海滨宋晓艳刘雪梅贺定勇
Owner BEIJING UNIV OF TECH
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