Rare earth modified high oxygen titanium powder for 3D printing and preparation method

A 3D printing and rare earth modification technology, applied in the field of 3D printing materials, can solve the problems of restricting the promotion and use of 3D printing titanium products, poor fluidity, low plasticity of printing materials, etc. Excellent plasticity

Inactive Publication Date: 2019-07-09
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing titanium powder preparation methods, such as plasma rotating electrode method and gas atomization method, can prepare spherical titanium powder with low oxygen content, but the powder is expensive, which seriously restricts the promotion and use of 3D printed titanium products
[0004] In addition to low-oxygen spherical titanium powder, there are a large number of low-cost hydrogenated dehydrogenated titanium powders (made of sponge titanium or titanium processing scrap material hydrodehydrogenated) and TiH 2 Powder, their price is less than one-twentieth of that of football-shaped titanium powder, but due to their poor fluidity and high oxygen content (0.2-1.0wt.%), it leads to cracking during the printing process, and the plasticity of the printed material is extremely low. Difficult to use in 3D printing manufacturing

Method used

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  • Rare earth modified high oxygen titanium powder for 3D printing and preparation method
  • Rare earth modified high oxygen titanium powder for 3D printing and preparation method
  • Rare earth modified high oxygen titanium powder for 3D printing and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: prepare Y-containing titanium powder with hydrodehydrogenation titanium powder

[0037] The hydrogenated dehydrogenation titanium powder (all particle size2 The powder was mechanically mixed for 12 hours under the protection of Ar to obtain a mixed powder; the mixed powder was taken out and put into a cold isostatic pressing bag for pressing at a pressure of 150 MPa and held for 5 minutes. The pressed blank is put into a vacuum furnace and sintered into a rod, and the vacuum degree during sintering is -3 Pa, the sintering temperature is 1200°C, and the sintering time is 1.5h. After the sintered bar is processed, the electrode induction melting gas atomization method is used for atomization and powder production.

[0038] figure 1 It is the distribution of main elements in the sintered rod, and the white particles in the figure are Y 2 o 3 The particles, whose size is about 20 μm, are unevenly distributed throughout the cross-section. The composition of...

Embodiment 2

[0041] Embodiment 2: with TiH 2 Powder preparation of Ce-containing titanium powder

[0042] TiH 2 powder (2 The powder was mechanically mixed for 12 hours under the protection of Ar to obtain a mixed powder; the mixed powder was taken out and put into a mold for compression molding at a pressure of 250 MPa and held for 5 minutes. The pressed blank is put into a vacuum furnace for sintering, and the vacuum degree during sintering is -3 Pa, the sintering temperature is 1200°C, and the sintering time is 2h.

[0043] The sintered blank is atomized and powdered by electrode induction melting gas atomization method after turning. The oxygen content of the atomized powder is 0.35wt.%, and the Ce content is 0.28wt.%. The powder with a particle size in the range of 53-120 μm was screened out as the raw material for laser coaxial 3D printing. After 3D printing, the tensile strength of the material is 650MPa, and the elongation is 25%.

Embodiment 3

[0044] Embodiment 3: manufacture Y-containing titanium powder with titanium powder

[0045] Titanium scrap powder (2 The powder was mechanically mixed for 12 hours under the protection of Ar to obtain the mixed powder; the mixed powder was taken out and placed in a circular steel sheath for degassing treatment, the degassing temperature was 500 °C, and the vacuum degree was -3 Pa, degassing holding time 3h. The material after wrapping and degassing treatment is placed in a hot isostatic pressing furnace for densification at a temperature of 900°C and a pressure of 150 MPa for 3 hours.

[0046] After the obtained rods are machined, the electrode induction melting gas atomization method is used for atomization and pulverization. The oxygen content of the powder after atomization is 0.63wt.%, and the Y content is 0.55wt.%. The powder with a particle size in the range of 53-120 μm was screened out as the raw material for laser coaxial 3D printing. After 3D printing, the tensile ...

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Abstract

The invention relates to a rare earth modified high oxygen titanium powder for 3D printing and a preparation method. The rare earth modified high oxygen titanium powder for 3D printing is a powder product prepared by adding a rare earth additive to a pure titanium matrix, wherein the addition amount of the rare earth additive is 0.05%-1.5% of the total mass of an alloy. Compared with the prior art, a certain amount of rare earth elements are added to hydrogenation dehydrogenation titanium powder or TiH2 powder, an electrode rod is made by a powder metallurgy method (cold isostatic pressure, molding pressure or hot isostatic pressure) after mixing, and then the high oxygen titanium powder is prepared by aerosol atomization. The tensile strength of the rare earth modified titanium powder is500-900 MPa after 3D printing, and the elongation is 15%-30%. The rare earth modified high oxygen titanium powder for 3D printing and the preparation method can effectively use the low cost and high oxygen hydrogenation dehydrogenation titanium powder or the TiH2 powder to obtain 3D printing materials with excellent high-plasticity, and havea good application prospect.

Description

technical field [0001] The invention relates to the field of 3D printing materials, in particular to a rare-earth modified high-oxygen titanium powder for 3D printing and a preparation method thereof. Background technique [0002] Titanium and its alloys have low density, high specific strength, high corrosion resistance, and good biocompatibility, and are widely used in chemical, medical, aerospace, navigation, automotive and other fields. Additive manufacturing (3D printing) technology, as an advanced manufacturing process, can directly manufacture products with complex shapes, and has important applications in aerospace and medical fields. [0003] For powder-based 3D printing technology, in order to obtain high-quality 3D printed parts, it is generally believed that the oxygen content of the raw material powder should be low. ASTM F2924 stipulates that the oxygen content of titanium alloys should not exceed 0.2wt.%. The existing titanium powder preparation methods, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/05C22C1/10B22F3/105B22F3/04B22F3/10B22F3/02B22F3/15B22F9/08B33Y70/00
CPCC22C14/00C22C1/05B22F3/04B22F3/1007B22F3/02B22F3/15B22F9/082B33Y70/00B22F2009/0836B22F10/00B22F10/25Y02P10/25
Inventor 孙继锋杨旗吴文恒
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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