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High strength and high hardness AlCoCrFeNi high-entropy alloy and preparation method thereof

A high-entropy alloy and high-hardness technology is applied in the field of high-strength and high-hardness AlCoCrFeNi high-entropy alloys and their preparation, which can solve the problems of bottlenecks in the research and development of metal materials, inability to meet industrial application requirements, etc., and achieve the effect of good application prospects.

Inactive Publication Date: 2017-10-20
JILIN INST OF CHEM TECH
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Problems solved by technology

[0002] With the development of modern industry, higher and higher performance requirements are put forward for metal materials: excellent mechanical properties, high temperature resistance, corrosion resistance, soft magnetic properties, etc., although through new material processing technologies such as rapid solidification and laser processing Improve the performance of materials, but still cannot meet the requirements of industrial applications, and the research and development of traditional metal materials has entered a bottleneck

Method used

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  • High strength and high hardness AlCoCrFeNi high-entropy alloy and preparation method thereof
  • High strength and high hardness AlCoCrFeNi high-entropy alloy and preparation method thereof
  • High strength and high hardness AlCoCrFeNi high-entropy alloy and preparation method thereof

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Embodiment Construction

[0011] 1. The preparation of high entropy alloy, the preparation process is as follows:

[0012] 1) Raw material preparation: The alloy smelting raw materials used in the present invention are high-purity (≥ 99.9%) Al, Co, Cr, Fe and Ni elements, and the raw materials are removed from scale by means of grinding wheels, and accurately weighed and formulated according to the molar ratio. Ratio, cleaned with ultrasonic vibration in alcohol for use in smelting alloys. The nominal composition (at.%) of AlCoCrFeNi high-entropy alloys (HEAs) is shown in Table 1:

[0013] element

Al

Cr

co

Fe

Ni

nominal component

25

25

25

25

25

[0014] 2) Preparation of high-entropy alloys: the invention uses a vacuum non-consumable electric arc furnace to smelt alloys. When smelting, place the proportioned raw materials in a water-cooled copper crucible, and evacuate the furnace cavity to 1×10 -3 After Pa is below, fill the furnace cavity with ...

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Abstract

The invention relates to a high-strength and high-hardness AlCoCrFeNi high-entropy alloy and a preparation method thereof. The composition of the high-entropy alloy is AlaCobCrcFedNie, 20≤a≤30, 20≤b≤30, 20≤c≤30, 20≤d≤30, 20≤e≤30. The preparation method of the alloy of the present invention includes: accurately weighing and proportioning the surface oxide skins of metallurgical raw materials Al, Co, Cr, Fe and Ni metals according to the molar ratio, and preparing the alloy by smelting; melting the alloy by using a non-consumable vacuum electric arc furnace , the alloy is cast into a copper mold, and then heat-treated to obtain a high-entropy alloy bulk material. The high-entropy alloy of the present invention has high strength and high hardness, therefore, the high-entropy alloy has a good application prospect in parts with pressure resistance and hardness requirements.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, and provides a high-strength, high-hardness AlCoCrFeNi high-entropy alloy and a preparation method thereof. The high-entropy alloy has good application prospects in high-pressure-resistant and high-hard parts. Background technique [0002] With the development of modern industry, higher and higher performance requirements are put forward for metal materials: excellent mechanical properties, high temperature resistance, corrosion resistance, soft magnetic properties, etc., although through new material processing technologies such as rapid solidification and laser processing Improve the performance of materials, but still cannot meet the requirements of industrial applications, and the research and development of traditional metal materials has entered a bottleneck. [0003] A high-entropy alloy is defined as an alloy with at least 5 main elements and an atomic concentration of...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02
Inventor 曲明洋李廷取刘祥玲
Owner JILIN INST OF CHEM TECH
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