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A kind of high strength and toughness high entropy alloy and preparation method thereof

A high-entropy alloy, high-strength technology, applied in the direction of additive processing, etc., can solve the problems of difficult to achieve the properties of alloy materials, can not meet the requirements of equipment service, etc., to achieve the effect of avoiding insufficient diffusion, easy forming, and low price

Active Publication Date: 2019-11-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional alloy materials can no longer meet the service requirements of equipment
In the past few decades, researchers have made great efforts to improve the properties of alloys, including alloy composition adjustment, grain refinement, heat treatment and alloy deformation, etc., but the above methods are difficult to achieve a significant improvement in the properties of alloy materials

Method used

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  • A kind of high strength and toughness high entropy alloy and preparation method thereof
  • A kind of high strength and toughness high entropy alloy and preparation method thereof
  • A kind of high strength and toughness high entropy alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A kind of high-strength toughness high-entropy alloy of this embodiment, its raw material composition is as follows according to mass percentage: Ni: 27.5%, Cr: 16.5%, W: 14.5%, Fe: 37.5%, Ti: 4.0%, the particle size of above-mentioned material is 15-53um, purity ≥99.9%.

[0024] A method for preparing a high-strength and toughness high-entropy alloy of the present embodiment comprises the following steps:

[0025] (1) The raw materials are mixed and prepared into spherical alloy powder, the particle size of the alloy powder material is 15-53um; the raw material components include: Ni: 27.5%, Cr: 16.5%, W: 14.5%, Fe: 37.5% , Ti: 4.0%, the purity of the above raw materials is ≥99.9%;

[0026] (2), the alloy powder that step (1) makes is placed in dry box and carries out drying deoxidation, and vacuum degree is 1 * 10 -2 Pa, the temperature is 60°C, the time is 7h, then naturally cool to room temperature, and store in vacuum packaging;

[0027] (3) Place the alloy powd...

Embodiment 2

[0032] A kind of high-strength toughness high-entropy alloy of the present embodiment, its raw material composition is as follows by mass percentage: Ni: 28.0%, Cr: 15.5%, W: 13.5%, Fe: 40.0%, Ti: 3.0%, the particle size of above-mentioned material is 15-53um, purity ≥99.9%.

[0033] A method for preparing a high-strength and toughness high-entropy alloy of the present embodiment comprises the following steps:

[0034] (1) The raw materials are mixed and prepared into spherical alloy powder, the particle size of the alloy powder material is 15-53um; the raw material components include: Ni: 28.0%, Cr: 15.5%, W: 13.5%, Fe: 40.0% , Ti: 3.0%, the purity of the above raw materials is ≥99.9%;

[0035] (2), the alloy powder that step (1) makes is placed in dry box and carries out drying deoxidation, and vacuum degree is 1 * 10 -2 Pa, the temperature is 80°C, the time is 8h, then naturally cool to room temperature, and store in vacuum packaging;

[0036] (3) Place the alloy powder ...

Embodiment 3

[0041] A kind of high-strength toughness high-entropy alloy of this embodiment, its raw material composition is as follows by mass percentage: Ni: 26.5%, Cr: 16.3%, W: 14.3%, Fe: 39.4%, Ti: 3.5%, the particle size of above-mentioned material is 15-53um, purity ≥99.9%.

[0042] A method for preparing a high-strength and toughness high-entropy alloy of the present embodiment comprises the following steps:

[0043] (1) The raw materials are mixed and prepared into spherical alloy powder, the particle size of the alloy powder material is 15-53um; the raw material components include: Ni: 26.5%, Cr: 16.3%, W: 14.3%, Fe: 39.4% , Ti: 3.5%, the purity of the above raw materials is ≥99.9%;

[0044] (2), the alloy powder that step (1) makes is placed in dry box and carries out drying deoxidation, and vacuum degree is 1 * 10 -2 Pa, the temperature is 70°C, the time is 6h, then naturally cool to room temperature, and store in vacuum packaging;

[0045] (3) Place the alloy powder prepare...

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Abstract

The invention relates to high-intensity high-toughness high-entropy alloy and a preparation method thereof. According to the method, (1) raw materials are mixed and merged to prepare spherical alloy powder; the raw material ingredients includecomprise 26.5 to 28.0 percent of Ni, 15.5 to 16.5 percent of Cr, 13.5 to 14.5 percent of W, 37.5 to 40.0 percent of Fe and 3.0 to 4.0 percent of Ti in partsby weight; the purity of the raw materials is higher than or equal to 99.9 percent; (2) the alloy powder prepared in the step (1) is subjected to drying deoxygenation; (3) alloy powder prepared in thestep (2) are put into a 3D printer powder cylinder; (4) a printing machine is set; the equipment is started for alloy preparation; (5) after the alloy preparation is completed, sampling is performedafter the weighting for 2 to 4 hours. The spherical alloy powder and 3D printing high-entropy alloy preparation are used; the high-intensity high-toughness high-entropy alloy is successfully prepared;the important significance is realized on the material range expansion. The alloy element used by the alloyprovided by the invention has the relatively low price; the preparation process is simple; acomplicated structure component can be formed. The alloy prepared by the method has excellent intensity and toughness; the use requirements in some special occasions can be met.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a high-strength and tough high-entropy alloy and a preparation method thereof. Background technique [0002] With the continuous improvement of equipment performance, higher requirements are put forward for alloy materials. Traditional alloy materials can no longer meet the service requirements of equipment. In the past few decades, researchers have made great efforts to improve the properties of alloys, including alloy composition adjustment, grain refinement, heat treatment and alloy deformation, etc., but it is difficult for the above methods to achieve a significant improvement in the properties of alloy materials. High-entropy alloys are a new type of alloy material. Due to their high mixing entropy, they tend to form FCC or BCC simple solid solution phases instead of intermetallic compounds or other complex ordered phases. The unique crystal structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00C22C1/04C22C30/00C22C33/02C22C38/44C22C38/50
Inventor 席生岐杨喜岗周赟朱蕊花董凯强陈鹏
Owner XI AN JIAOTONG UNIV