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Technique for preparing special Ti6Al4V alloy powder used for material increase manufacturing

A process method and alloy powder technology, which is applied in the field of preparing Ti6Al4V alloy powder for additive manufacturing, can solve the problems of no formation, influence of forming process, high price, etc., achieve non-oxidized temperature and composition, increase melting rate, and uniform solution composition Effect

Active Publication Date: 2014-11-19
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the titanium alloy currently used in the field of additive manufacturing still has the following problems: first, the oxygen content in the titanium alloy powder cannot meet the requirements, and a higher oxygen content will affect the forming process and reduce the quality of the titanium alloy formed parts. Quality; Second, there is a lack of material standardization and serialization specifications. Additive manufacturing has high requirements on the particle size distribution, bulk density, oxygen content, fluidity and other properties of powder materials, but there is no industry standard yet; Third, the cost of titanium alloy powder is relatively high. Due to the difficulty in producing titanium alloy powder, titanium alloy powder that meets the requirements cannot be manufactured in China at present. It mainly relies on imported foreign materials, which makes the price of materials higher, which affects the promotion and application of additive manufacturing.

Method used

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  • Technique for preparing special Ti6Al4V alloy powder used for material increase manufacturing
  • Technique for preparing special Ti6Al4V alloy powder used for material increase manufacturing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw material preparation: The high-purity Ti powder and Al-V master alloy powder are ball milled and mixed according to the alloy composition ratio by the mixed element method to obtain a mixed powder, and then the mixed powder is pressed into a bar block by the cold isostatic pressing method. The alloy composition ratio is: Al: 5.5%, V: 3.5%, Fe≤0.3%, C≤0.1%, N≤0.05%, H≤0.015%, O≤0.2%, the balance is Ti, and the purity of Ti is above 99.9%.

[0030] Alloy Melting: Place the bar block from the previous step in a water-cooled copper crucible, vacuumize the melting chamber, and then heat and melt the bar block by electromagnetic induction, and control the superheat of the titanium alloy solution obtained after melting to 190±1°C.

[0031] Atomized powder: The metal melt obtained after smelting titanium alloy powder is atomized into fine droplets through the 99.999% high-purity argon high-pressure airflow sprayed by multi-stage annular holes, and the atomized fine par...

Embodiment 2

[0034] Raw material preparation: The high-purity Ti powder and Al-V master alloy powder are ball milled and mixed according to the alloy composition ratio by the mixed element method to obtain a mixed powder, and then the mixed powder is pressed into a bar block by the cold isostatic pressing method. The alloy composition ratio is: Al: 6.75%, V: 4.5%, Fe ≤ 0.3%, C ≤ 0.1%, N ≤ 0.05%, H ≤ 0.015%, O ≤ 0.2%, the balance is Ti, and the purity of Ti is above 99.9%.

[0035] Alloy Melting: Place the bar block from the previous step in a water-cooled copper crucible, vacuumize the melting chamber, and then heat and melt the bar block by electromagnetic induction, and control the superheat of the titanium alloy solution obtained after melting to 210±1°C.

[0036] Atomized powder: The metal melt obtained after smelting titanium alloy powder is atomized into fine droplets through the 99.999% high-purity argon high-pressure airflow sprayed by multi-stage annular holes, and the atomiz...

Embodiment 3

[0039] Raw material preparation: The high-purity Ti powder and Al-V master alloy powder are ball milled and mixed according to the alloy composition ratio by the mixed element method to obtain a mixed powder, and then the mixed powder is pressed into a bar block by the cold isostatic pressing method. The alloy composition ratio is: Al: 6.0%, V: 4.0%, Fe ≤ 0.3%, C ≤ 0.1%, N ≤ 0.05%, H ≤ 0.015%, O ≤ 0.2%, the balance is Ti, and the purity of Ti is above 99.9%.

[0040] Alloy Melting: Place the bar block from the previous step in a water-cooled copper crucible, vacuumize the melting chamber, and then heat and melt the bar block by electromagnetic induction, and control the superheat of the titanium alloy solution obtained after melting to 200±1°C.

[0041] Atomized powder: The metal melt obtained after smelting titanium alloy powder is atomized into fine droplets through the 99.999% high-purity argon high-pressure airflow sprayed by multi-stage annular holes, and the atomize...

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Abstract

The invention discloses a technique for preparing special Ti6Al4V alloy powder used for material increase manufacturing. The technique organically combines vacuumized and water-cooled copper crucible induction smelting with multistage ultrasonic atomization on the basis of ensuring the purity of raw materials, ensures that titanium alloy is not oxidized and metal melt is uniform in temperature and ingredient during smelting to obtain consistent degree of superheat, and can prevent nozzle blockage as well as prevent that liquid drops adhere in the cooling process to from nonspherical particles; powder particles are relatively thinner and uniform and can reach high standards of requirements on particle size distribution, apparent density, oxygen content, liquidity and other performances.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a process method for preparing special Ti6Al4V alloy powder for additive manufacturing. Background technique [0002] The manufacturing industry has always been the pillar of the national economy. With the continuous development of science and technology, the manufacturing industry is also making continuous progress and innovation. The additive manufacturing technology commonly known as "3D printing" is a new type of manufacturing technology developed under this situation. As an important supplement to the traditional manufacturing technologies of subtractive manufacturing and isomaterial manufacturing, additive manufacturing technology is being increasingly widespread attention. Additive manufacturing technology is a technology that uses CAD data to accumulate material layer by layer to manufacture solid parts. It is a bottom-up material accumulation method. Through layer-by-laye...

Claims

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Application Information

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IPC IPC(8): B22F9/08C22C1/03C22C14/00
Inventor 李海英刘睿诚万宁姚爽严东海
Owner 四川省有色冶金研究院有限公司
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