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Additive manufacturing method for nano-particle reinforced titanium-based composite material based on electron beam selective melting

A technology for a titanium-based composite material and a manufacturing method, which is applied in the directions of additive manufacturing, additive processing, etc., can solve the problems that the content of the reinforcement phase is difficult to precisely control, the particle clusters of the reinforcement phase are impermeable, and the content of oxygen and impurities is high. Outstanding mechanical properties at room temperature and high temperature, avoiding cracking and high purity

Active Publication Date: 2021-07-02
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the high content of oxygen and impurities in the existing laser additive manufacturing titanium-based composite materials, the content of the reinforcement phase is difficult to accurately control, the high content of the reinforcement phase is difficult to achieve, the reinforcement phase particles are clustered and impermeable, and it is easy to induce cracking and holes, etc., the present invention provides a nanoparticle-reinforced titanium-based composite material additive manufacturing method based on electron beam selective melting, which lays a technical foundation for manufacturing complex parts of high-performance nanoparticle-reinforced titanium-based composite materials

Method used

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  • Additive manufacturing method for nano-particle reinforced titanium-based composite material based on electron beam selective melting
  • Additive manufacturing method for nano-particle reinforced titanium-based composite material based on electron beam selective melting
  • Additive manufacturing method for nano-particle reinforced titanium-based composite material based on electron beam selective melting

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a nano-multiphase particle reinforced high-temperature titanium-based composite material with a volume fraction of the reinforced phase of 5.5% (TiB+Y 2 o 3 +Ti 5 Si 3 ) / Ti-6Al-3Sn-4Zr-0.9Mo additive manufacturing method. The composition of chemical elements corresponding to the in-situ self-generated high-temperature titanium-based composite material is as follows in mass ratio: Ti-6Al-3Sn-4Zr-0.9Mo-0.3Si-0.4Y-0.6B, that is, the mass ratio is 6% Al, 3% Sn, 4% Zr, 0.9% Mo, 0.3% Si, 0.4% Y, 0.6% B, and the rest Ti. The nano-reinforcement phase contains in situ self-generated TiB with a volume fraction of 3.4%, 0.95% Y 2 o 3 and about 1.2% Ti 5 Si 3 .

[0046] First, step ① manufactures spherical powder. First, the raw materials are prepared according to the element mass ratio of the titanium-based composite material Ti-6Al-3Sn-4Zr-0.9Mo-0.3Si-0.4Y-0.6B, and the conventional vacuum casting, high-temperature forging and mechanical processi...

Embodiment 2

[0052] The present embodiment provides a kind of nano multi-phase particle reinforced titanium-based composite material whose volume ratio is 5.5% (TiB+Y 2 o 3 ) / Ti-6Al-4V additive manufacturing method. The chemical elements corresponding to the in-situ self-generated high-temperature titanium-based composite material are: Ti-6Al-4V-0.9Y-0.6B, that is, the mass ratio is 6% Al, 4% V, 0.9% Y, 0.6% B, the balance Ti. The in situ self-generated nano-reinforced phase contains 3.4% TiB and 2.1% Y by volume 2 o 3 .

[0053] First, step ① manufactures spherical powder. Firstly, according to the mass ratio of alloy elements of titanium-based composite materials Ti-6Al-4V-0.9Y-0.6B, the raw materials are prepared, and the standard electrode rods for powder making are manufactured by means of conventional vacuum casting, high temperature forging and machining processes. Using the processed Ti-matrix composite electrode rod, the spherical powder was fabricated by the plasma rotating...

Embodiment 3

[0060] This embodiment provides a kind of nano-multiphase particle reinforced high-temperature titanium-based composite material with a volume ratio of 5.5% (TiB+Y 2 o 3 +Ti 5 Si 3 ) / Ti-6Al-3Sn-4Zr-0.9Mo additive manufacturing method. The mass ratio of alloy elements corresponding to the in-situ self-generated high-temperature titanium-based composite material is: Ti-6Al-3Sn-4Zr-0.9Mo-0.3Si-0.4Y-0.6B, that is, the mass ratio is 6% Al, 3% Sn, 4% of Zr, 0.9% of Mo, 0.3% of Si, 0.4% of Y, 0.6% of B, and the balance of Ti. The nano-reinforcement phase contains in situ autogeneous volume ratio of 3.4% TiB, 0.95% Y 2 o 3 and about 1.2% Ti 5 Si 3 .

[0061] The difference between this embodiment and embodiment 1 lies in that: step ① the spherical powder is manufactured by using the crucible-less induction gas atomization method (EIGA). The process parameters of EIGA powder making process are as follows: electrode rod size , Melting temperature 1850℃, argon pressure 3.0MPa....

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Abstract

The invention relates to an additive manufacturing method for a nano-particle reinforced titanium-based composite material based on electron beam selective melting. The additive manufacturing method comprises the steps that S1, manufacturing titanium-based composite material spherical powder; S2, screening the powder; S3, constructing a digital model; S4, electron beam additive manufacturing; and S5, post-processing. According to the method of the invention, titanium-based composite material spherical pre-alloyed powder is directly used, additive manufacturing of the nano-particle reinforced titanium-based composite material is carried out under the conditions of high vacuum and in-situ annealing, and in-situ synthesis and dense three-dimensional net-shaped uniform distribution of a nano reinforced phase are achieved. According to the nano-particle reinforced titanium-based composite material manufactured through the method, the density reaches up to 99.8%, the oxygen content is lower than 0.12 wt%, the volume fraction of the reinforced phase can reach 5.0% or above, and the mechanical property is close to the level of a conventional forge piece. Therefore, the method provided by the invention is particularly suitable for low-cost manufacturing of high-performance nano-particle reinforced titanium-based composite parts with complex structures.

Description

technical field [0001] The invention relates to an additive manufacturing method of nanoparticle-reinforced titanium-based composite materials based on electron beam selective melting, and belongs to the technical field of additive manufacturing of metal-based composite materials. Background technique [0002] Particle-reinforced titanium-based composite material is a light-weight, high-temperature, high-strength structural material with great application prospects. It has an important strategic position in the fields of aerospace, marine equipment, and lightweight weapons and equipment. However, titanium-based composites are difficult to plastically deform at high temperatures, and have high high-temperature activity, which makes it difficult to form precision die forging or precision casting. The fracture and orientation of whiskers in the reinforced phase during plastic processing will weaken the strengthening effect and deteriorate the plasticity. Particle-reinforced ti...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C32/00B22F10/28B33Y10/00B33Y40/10B33Y40/20B33Y50/02B33Y70/10B33Y80/00C22C1/05
CPCC22C14/00C22C32/00C22C32/0047C22C1/05B33Y10/00B33Y80/00B33Y70/10B33Y50/02B33Y40/20B33Y40/10
Inventor 牛红志谭浩殷宝国张德良
Owner NORTHEASTERN UNIV
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