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Preparation method of Nb roughening titanium aluminum base alloy composite material

A composite material and base alloy technology, applied in the field of powder metallurgy materials, can solve the problems of reducing the toughness of titanium-aluminum-based alloy materials, complex preparation process of AlC particles, and increasing the preparation cost of composite materials, so as to reduce deformation resistance and be difficult to stress concentration. , Uniform effect of plastic deformation

Active Publication Date: 2018-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Al 2 o 3 、TiB 2 and SiC particles belong to the brittle phase, which improves the strength and reduces the toughness of the titanium-aluminum-based alloy material to a certain extent, while Ti 2 The preparation process of AlC particles is complicated, which increases the preparation cost of composite materials

Method used

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  • Preparation method of Nb roughening titanium aluminum base alloy composite material
  • Preparation method of Nb roughening titanium aluminum base alloy composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 Shown, a kind of preparation method of titanium-aluminum matrix composite rod, comprises the following steps:

[0037] (1) With a particle size of -100 mesh titanium-aluminum pre-alloy powder (oxygen content is 0.47%) and a particle size of -150 mesh Nb powder (oxygen content is 0.34%) as raw materials, the above-mentioned titanium-aluminum pre-alloy powder is mixed with a V-shaped mixer The alloy powder and Nb powder were mixed for 8 hours, and the mixing process was always protected by argon; among them, the atomic ratio content of each element in the titanium-aluminum pre-alloy powder: Al: 45%, Nb: 7%, W: 0.4%, and the rest is Ti , the volume ratio content of Nb powder is 2% of the total amount of titanium-aluminum pre-alloyed powder and Nb powder;

[0038] (2) Put the mixed powder in step (1) into a cylindrical stainless steel sheath, the stainless steel sheath size is φ60×150mm (that is, the inner diameter d is 60mm, h is 150mm, the same below), a...

Embodiment 2

[0049] Such as figure 1 Shown, a kind of preparation method of titanium-aluminum matrix composite rod, comprises the following steps:

[0050] (1) With a particle size of -50 mesh titanium-aluminum pre-alloyed powder (oxygen content is 0.47%) and a particle size of -150 mesh Nb powder (oxygen content is 0.34%) as raw materials, the above-mentioned titanium-aluminum pre-alloy powder is mixed with a V-shaped mixer The alloy powder and Nb powder were mixed for 8 hours, and the mixing process was always protected by argon; among them, the atomic ratio content of each element in the titanium-aluminum pre-alloyed powder: Al: 45%, Nb: 5%, W: 0.4%, and the rest was Ti , the volume ratio content of Nb powder is 4% of the total amount of titanium-aluminum pre-alloyed powder and Nb powder;

[0051] (2) Put the powder mixed in step (1) into a cylindrical stainless steel sheath with a size of φ60×150mm, seal it with a stainless steel end cap and vacuum weld it, and then start hot isostati...

Embodiment 3

[0055] Such as figure 1 Shown, a kind of preparation method of titanium-aluminum matrix composite rod, comprises the following steps:

[0056] (1) With a particle size of -50 mesh titanium-aluminum pre-alloyed powder (oxygen content is 0.47%) and a particle size of -150 mesh Nb powder (oxygen content is 0.34%) as raw materials, the above-mentioned titanium-aluminum pre-alloy powder is mixed with a V-shaped mixer The alloy powder and Nb powder were mixed for 8 hours, and the mixing process was always protected by argon; among them, the atomic ratio content of each element in the titanium-aluminum pre-alloyed powder: Al: 45%, Nb: 5%, W: 0.4%, and the rest was Ti , the volume ratio content of Nb powder is 4% of the total amount of titanium-aluminum pre-alloyed powder and Nb powder;

[0057] (2) Put the mixed powder in step (1) into a cylindrical stainless steel sheath, the stainless steel sheath size is φ60×150mm (that is, the inner diameter d is 60mm, h is 150mm, the same below...

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Abstract

The invention discloses a preparation method of a Nb roughening titanium aluminum base alloy composite material. The preparation method comprises the following steps: (1) titanium aluminum prealloyingpowder and Nb powder are uniformly mixed to form mixed powder, wherein the titanium aluminum prealloying powder comprises Ti, Al, Nb and W; (2) hot isostatic pressing is performed on the mixed powderobtained in the step (1) in vacuum to obtain a hot isostatic pressing blank; (3) high-temperature hot extrusion is performed on the hot isostatic pressing blank prepared in the step (2); and a rod blank is prepared after air cooling; and (4) the rod blank prepared in the step (3) is heated, and is cooled along with a furnace to obtain the Nb roughening titanium aluminum base alloy composite material. The preparation method is simple in process step, shorter in production period, simple and easy-obtained in raw material and low in cost; and prepared products are excellent in performance.

Description

technical field [0001] The invention belongs to the field of powder metallurgy materials, and in particular relates to a preparation method of a titanium-aluminum base alloy composite material. Background technique [0002] Titanium-aluminum alloy has the advantages of low density, high strength, high hardness, corrosion resistance, creep resistance, oxidation resistance and high temperature resistance, etc. It has broad application prospects in aviation, aerospace, weapon industry and civil industry. Compared with other common structural material alloys, titanium aluminum alloy has certain advantages. The specific modulus of elasticity of titanium-aluminum alloy is 50-70% higher than that of titanium alloy, and it can still maintain high hardness at high temperatures. Compared with nickel-based superalloys, the elastic modulus (160-180GPa) of titanium-aluminum alloys is close to that of nickel-based superalloys, but the density of titanium-aluminum alloys (3.7-4.1g / cm 3 )...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/15B22F3/20B22F3/24C22C1/04C22C30/00
CPCB22F3/15B22F3/20B22F3/24B22F2003/208B22F2003/248C22C1/0458C22C14/00C22C30/00
Inventor 刘咏欧阳思慧刘彬李慧中梁宵鹏
Owner CENT SOUTH UNIV
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