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Method for preparing high-strength and high-toughness FCC phase high-entropy alloy

A high-entropy alloy and high-toughness technology, which is applied in the direction of additive manufacturing, energy efficiency improvement, process efficiency improvement, etc., to achieve high economic benefits, high hardness, and excellent strength

Pending Publication Date: 2021-12-07
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies and literature reports on the evolution of microstructure and mechanical properties of high-entropy alloys prepared by additive manufacturing technology after cold rolling followed by high-temperature annealing, and more are speculations without clear techniques to obtain corresponding alloys. Open plan

Method used

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  • Method for preparing high-strength and high-toughness FCC phase high-entropy alloy
  • Method for preparing high-strength and high-toughness FCC phase high-entropy alloy
  • Method for preparing high-strength and high-toughness FCC phase high-entropy alloy

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Embodiment

[0024] Example: A method for preparing a high-strength and high-toughness FCC phase high-entropy alloy, preparing two groups of raw materials comprising Co, Cr, Fe, Ni, Al with an atomic percentage of 1:1:1:1:0.4 Powder, the purity of the above-mentioned raw material powder is greater than 99.95%, and the particle size is kept at 200-325 mesh, including the following preparation steps:

[0025] (1) Put the above two groups of elemental powders into the ball milling tank of the high-energy ball mill together with the alumina grinding balls after being mixed in a vacuum glove box respectively. The mass ratio of the five metal powders to the alumina grinding balls is 1:1.5. The high-energy ball mill runs forward for 5 minutes, stops for 5 minutes, then reverses for 5 minutes, and stops for 5 minutes;

[0026] (2) Turn off the high-energy ball mill after running for 12 hours, take out the uniformly mixed high-entropy alloy powder, put them in a vacuum drying oven for 2 hours, and ...

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Abstract

The invention discloses a method for preparing high-strength and high-toughness FCC phase high-entropy alloy. The method is characterized by comprising the steps that high-purity metal powder Co, Cr, Fe, Ni and Al are used as raw materials, the elementary substance powder is mechanically mixed in a high-energy ball mill according to a certain proportion and then is put into a vacuum drying oven to be dried, then a powder plasma arc additive manufacturing technology is adopted to obtain CoCrFeNiAl0.4 high-entropy alloy through layer-by-layer deposition, then cold rolling is conducted on the prepared CoCrFeNiAl0.4 high-entropy alloy, and then high-temperature annealing is conducted. According to the method, the technical scheme is adopted,so that the high-entropy alloy obtained and prepared through the raw material powder plasma arc additive manufacturing technology is high in efficiency, good in quality, low in manufacturing cost, higher in economic benefit and wide in application prospect.

Description

technical field [0001] The invention belongs to the field of additive manufacturing of metal materials, and proposes a cold-rolled composite plasma arc additive manufacturing process for high-entropy alloys, and relates to a method for preparing high-strength and high-toughness FCC phase high-entropy alloys. Background technique [0002] Additive manufacturing technology has many advantages such as short process and high material utilization rate. It has been widely used in aerospace, shipbuilding, automotive engineering, biomedicine and other fields, especially in the preparation of complex structural parts. It has great application potential . However, additive manufacturing technology has the defect of insufficient mechanical properties of components. [0003] Traditional alloys are mainly composed of one or two metal elements, and some other elements are added to adjust the mechanical properties of the alloy. High-entropy alloys are composed of more than four main elem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/66B22F9/04B33Y10/00B33Y40/10B33Y40/20B33Y70/00C22C30/00
CPCB22F10/28B22F10/66B22F9/04C22C30/00B33Y10/00B33Y40/10B33Y40/20B33Y70/00B22F2009/043Y02P10/25
Inventor 陈希章李强张玉朋
Owner WENZHOU UNIVERSITY
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