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Ti-based high temperature alloy with high toughness in bi-state structure and preparation method and application thereof

A high-temperature alloy and two-state structure technology, applied in the field of high-strength and tough titanium-based superalloy and its preparation, can solve the problems of high cost, complicated preparation process, large alloy grain size, etc., and achieve convenient operation, simple processing process, and high-quality products. high rate effect

Active Publication Date: 2013-09-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium-based superalloys of this type of structure are mainly obtained by casting and subsequent heat treatment, the preparation process is complicated, the cost is relatively high, and the grain size of the prepared alloy is relatively large

Method used

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  • Ti-based high temperature alloy with high toughness in bi-state structure and preparation method and application thereof
  • Ti-based high temperature alloy with high toughness in bi-state structure and preparation method and application thereof
  • Ti-based high temperature alloy with high toughness in bi-state structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of a high-strength and tough titanium-based superalloy with a two-state structure

[0040] (1) Preparation of alloy powder by high energy ball milling

[0041] Mix the components evenly and place them in a planetary ball mill (QM-2SP20) for high-energy ball milling to obtain alloy powder.

[0042] Among them, the distribution ratio of each component is: Ti66at.%, Nb13at.%, Cu8at.%, Ni6.8at.%, Al6.2at.%; all components are elemental powder, the particle size is about 75μm.

[0043] Ball mill: The ball milling media such as tank body and ball material are all stainless steel, the ball diameters are 15, 10 and 6mm respectively, and their weight ratio is 1:3:1.

[0044] The process parameters of high-energy ball milling are as follows: the ball mill tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, the ball-to-material ratio is 8:1, and the rotation speed is 2s -1 , the milling time is 1h.

[0045] (2) Pulse current sintered a...

Embodiment 2

[0056] Example 2: Preparation of a high-strength and tough titanium-based superalloy with a two-state structure

[0057] (1) Preparation of alloy powder by high energy ball milling

[0058] Mix the components evenly and place them in a planetary ball mill (QM-2SP20) for high-energy ball milling to obtain alloy powder.

[0059] Among them, the distribution ratio of each component is: Ti68at.%, Nb8at.%, Cu10at.%, Ni6at.%, Al8at.%; all components are elemental powder, and the particle size is about 100μm.

[0060] Ball mill: The ball milling media such as tank body and ball material are all stainless steel, the ball diameters are 15, 10 and 6mm respectively, and their weight ratio is 1:3:1.

[0061] The high-energy ball mill process parameters are as follows: the ball mill tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, the ball-to-material ratio is 10:1, and the rotation speed is 3.8s -1 , The ball milling time is 20h.

[0062] (2) Pulse current sinter...

Embodiment 3

[0072] Example 3: Preparation of a high-strength and tough titanium-based superalloy with a two-state structure

[0073] (1) Preparation of alloy powder by high energy ball milling

[0074] Mix the components evenly and place them in a planetary ball mill (QM-2SP20) for high-energy ball milling to obtain alloy powder.

[0075] Among them, the distribution ratio of each component is: Ti64at.%, Nb18at.%, Cu6at.%, Ni5at.%, Al7at.%; all components are elemental powder, and the particle size is about 150μm.

[0076] Ball mill: The ball milling media such as tank body and ball material are all stainless steel, the ball diameters are 15, 10 and 6mm respectively, and their weight ratio is 1:3:1.

[0077] The high-energy ball milling process parameters are as follows: the ball milling tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, the ball-to-material ratio is 12:1, and the rotation speed is 5s -1 , The ball milling time is 30h.

[0078] (2) Pulse current si...

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Abstract

The invention belongs to the technical field of metal high temperature alloys, and discloses a ti-based high temperature alloy with high toughness in a bi-state structure and a preparation method and an application thereof. The high temperature alloy comprises the following components in atomic percent: 64-68at.% of Ti, 8-18at.% of Nb, 6-10at.% of Cu, 5-8at.% of Ni, 3-8at.% of Al and inevitable trace impurities. The structure of the ti-based high temperature alloy consists of a widmanstatten structural base body and an equiaxial (Cu, Ni)-Ti2 phase. The invention further discloses the preparation method of the ti-based high temperature alloy. The method comprises the following steps: first, preparing alloy powder by high energy milling; and then, quickly sintering alloy powder by pulse current, wherein the process condition is as follows: in a spark plasma sintering system of pulse current, sintering is carried out for 5-25 minutes at the sintering temperature of 800-1000 DEG C and the sintering pressure of 30-400MPa, and therefor the ti-based high temperature alloy with high toughness in the bi-state structure is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal superalloy preparation, and in particular relates to a high-strength and tough titanium-based superalloy with a two-state structure, a preparation method and application 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 chemical industry, shipbuilding, medical treatment, energy and other fields. At the same time, as an important high-temperature material, titanium alloys also have important applications in aviation, aerospace and other fields. At present, the common microstructures of high-temperature titanium alloys mainly include lath-like near-α titanium alloys and two-state α+β titanium alloys (edited by C. ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/04
Inventor 杨超刘乐华李玉华李元元
Owner SOUTH CHINA UNIV OF TECH
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