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Titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and preparation method thereof

A high compression ratio, composite material technology, applied in the field of metal ultra-fine grain and fine-grained alloy preparation, can solve the problem of no titanium-based ultra-fine grain and fine-grain composite material, and achieve uniform microstructure and grain, high Effects of oxygen content, high compression ratio strength

Inactive Publication Date: 2011-01-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no literature report on the preparation of titanium-based ultrafine-grained and fine-grained composite materials with high compressive strength, high oxygen content, and high plasticity by powder metallurgy technology.

Method used

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  • Titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and preparation method thereof
  • Titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and preparation method thereof
  • Titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and preparation method thereof

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Embodiment 1

[0036] A titanium-based ultra-fine-grained composite material with high compression specific strength, the specific components and their content in atomic percentage are: Ti 85.5-92.5 at.%, O 6.0-8.8 at.%, N 1.3-1.9 at.% , Fe 1.0~1.9at.%, and the rest are inevitable trace impurities of nickel and carbon; its microstructure is represented by Hcp Ti 3 O is the matrix phase and Hcp Ti is the reinforcing phase; at the same time, both the matrix phase and the reinforcing phase contain dispersed FeTi 2 、NiTi 2 Or TiC nanocrystalline or ultrafine crystal compound particles.

[0037] The preparation method of the above-mentioned titanium-based ultrafine-grain composite material is a forming method combining high-energy ball milling technology and pulse current sintering technology, which includes the following steps and its process conditions:

[0038] Step 1: Preparation of amorphous titanium alloy powder by high energy ball milling

[0039] The initial powder is metal titanium po...

Embodiment 2

[0051] A titanium-based fine-grain composite material with high compression specific strength, the specific components and their content in atomic percentage are: Ti 85.5-92.5 at.%, O 6.0-8.8 at.%, N 1.3-1.9 at.%, Fe 1.0~1.9at.%, the rest are inevitable trace impurities of nickel and carbon; its microstructure takes Hcp Ti as the matrix phase, and Hcp Ti 3 O is the reinforcing phase, and at the same time, both the matrix phase and the reinforcing phase contain dispersed FeTi 2 、NiTi 2 Or TiC nanocrystalline or ultrafine crystal compound particles.

[0052] A preparation method of titanium-based fine-grained composite material with high compression specific strength is a forming method combining high-energy ball milling technology and pulse current sintering technology, which includes the following steps and its process conditions:

[0053] Step 1: Preparation of amorphous titanium alloy powder by high energy ball milling

[0054] The initial powder is metal titanium powder ...

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Abstract

The invention discloses a titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and a preparation method thereof. In a microstructure of the titanium-based ultrafine grain composite material, Hcp Ti3O is taken as a matrix phase and Hcp Ti as an enhanced phase; and in a microstructure of the titanium-based fine grain composite material, Hcp Ti is taken as the matrix phase and Hcp Ti3O as the enhanced phase. The preparation method comprises the following steps of: interruptedly exposing powder in the air until the initial powder becomes amorphous state titanium alloy powder by a high-energy ball; and quickly sintering by adopting pulse current at the sintering temperature Ts being not less than 740K and not more than 1,473K and the sintering pressure of at least 40MPa for 1-10 minutes. The method has simple process and convenient operation; grains have controllable size, high finished rate, raw materials saving and near net shape; and the large-sized titanium-based ultrafine grain or fine grain composite material has excellent comprehensive mechanical property and favorable popularization and application prospect.

Description

technical field [0001] The invention relates to the preparation technology of metal ultra-fine grain and fine-grain alloy, specifically a titanium-based ultra-fine grain or fine-grain composite material with high compression specific strength and a preparation method thereof. Background technique [0002] Titanium alloys have excellent comprehensive properties such as low density, high specific strength and specific fracture toughness, good low temperature toughness and corrosion resistance. As a new type of structural material and engineering material, titanium alloy has broad application prospects in aviation, aerospace, chemical industry, shipbuilding, medical treatment, energy and other fields. For a long time, improving the room temperature strength and plasticity of titanium alloys has been one of the important research topics in the field of advanced structural materials. Studies have shown that there are mainly the following methods for preparing high-strength and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/04
Inventor 杨超魏田李元元屈盛官李小强邵明
Owner SOUTH CHINA UNIV OF TECH
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