A kind of high-strength high-plasticity high-entropy alloy and preparation method thereof

A technology of high-entropy alloy and high plasticity, which is applied in the field of high-entropy alloy and its preparation, can solve the problem of low strength, achieve the effect of improving strength and plasticity, promoting fine-grain strengthening, and simple method

Active Publication Date: 2022-02-11
SOUTHEAST UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CoCrFeNi high-entropy alloy has a single FCC phase. It has very good corrosion resistance, high temperature resistance and plasticity, but its strength is low. Improving its performance in different ways has become a hot research topic.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high-strength high-plasticity high-entropy alloy and preparation method thereof
  • A kind of high-strength high-plasticity high-entropy alloy and preparation method thereof
  • A kind of high-strength high-plasticity high-entropy alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Use fine sandpaper to remove the oxide scales on the surface of metal Co, Cr, Fe, Ni, and then use absolute ethanol to perform ultrasonic cleaning to obtain a clean metal block; weigh the total amount according to the molar ratio of 1:1:1:1 Mixed raw materials with a mass of 70g;

[0028] (2) Repeatedly smelting the weighed raw materials in a high-purity Ar gas environment in a high-vacuum arc melting furnace;

[0029] (3) The alloy melted in the step (2) is cast into an ingot at a temperature of 1000° C. for 12 hours, subjected to homogenization heat treatment, and then taken out of water and quenched to room temperature to obtain a homogenized state high-entropy alloy.

[0030] Experimental results:

[0031] The high-entropy alloy prepared above was coarsely ground step by step with different types of sandpaper, finely ground to #1600, and then mechanically polished until there were no obvious scratches on the surface, and the alloy was corroded with a metallogra...

Embodiment 2

[0034] (1) Use fine sandpaper to remove the oxide skin on the surface of metal Co, Cr, Fe, Ni, Al-10Er, and then use absolute ethanol to perform ultrasonic cleaning to obtain a clean metal block; according to the molar ratio of 1:1:1:1 : 0.05 Weigh out the mixed raw material that total mass is 70g;

[0035] (2) Repeatedly smelting the weighed raw materials in a high-purity Ar gas environment in a high-vacuum arc melting furnace;

[0036] (3) The alloy melted in the step (2) is cast into an ingot at a temperature of 1000° C. for 12 hours, subjected to homogenization heat treatment, and then taken out of water and quenched to room temperature to obtain a homogenized state high-entropy alloy.

[0037] Experimental results:

[0038] The high-entropy alloy prepared above was coarsely ground step by step with different types of sandpaper, finely ground to #1600, and then mechanically polished until there were no obvious scratches on the surface, and the alloy was corroded with a me...

Embodiment 3

[0041] A preparation method of a high-strength high-plastic high-entropy alloy, the specific steps are as follows:

[0042] (1) Use fine sandpaper to remove the oxide skin on the surface of metal Co, Cr, Fe, Ni, Al-10Er, and then use absolute ethanol to perform ultrasonic cleaning to obtain a clean metal block; according to the molar ratio of 1:1:1:1 : 0.05 Weigh out the mixed raw material that total mass is 70g;

[0043] (2) Repeatedly smelting the weighed raw materials in a high-purity Ar gas environment in a high-vacuum arc melting furnace;

[0044] (3) Casting the alloy melted in step (2) into an ingot at a temperature of 1000°C for 12 hours, performing a homogenization heat treatment, and then taking out the water and quenching to room temperature to obtain a homogenized state high-entropy alloy;

[0045] (4) Cut the homogenized heat-treated alloy ingot in step (3) into 16×16×4mm samples, and carry out 4 passes of rolling at 650°C, each time the reduction is 0.5mm, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-strength and high-plastic high-entropy alloy and a preparation method thereof, belonging to the technical field of metal materials and manufacture. The raw materials for the preparation of the high-entropy alloy of the present invention are Co, Cr, Fe, Ni metal particles and Al-10Er (Er mass fraction is 10%) intermediate alloy particles, and the preparation method is as follows: the above-mentioned metal particles are weighed according to the set ratio , melted in a high-vacuum arc melting furnace and then solidified in a copper mold to prepare a high-entropy alloy. In the melting process, in order to ensure the uniformity of the alloy composition, the alloy block needs to be smelted repeatedly. Homogenize the as-cast high-entropy alloy prepared initially in a high-temperature heat treatment furnace, then water quench, and roll the high-entropy alloy ingot at a temperature of 500-800°C, and cool the rolled sample with air , a high-entropy alloy with high strength and high plasticity can be obtained. The high-entropy alloy prepared by the invention has excellent mechanical properties and simple preparation process.

Description

technical field [0001] The invention relates to a high-strength and high-plastic high-entropy alloy and a preparation method thereof, belonging to the technical field of metal materials and their preparation. Background technique [0002] Traditional alloys are generally based on one or two elements, and some specific performance requirements can be achieved by adding a small amount of other elements. With the further development of the alloy design concept, at the beginning of the 21st century, Taiwan scholar Ye Junwei broke through the traditional alloy design concept and took the lead in proposing the design idea of ​​"high-entropy alloy", that is, the number of principal elements in the alloy is not less than 5, and each principal element The molar ratio of yuan is between 5% and 35%. High-entropy alloys have high-entropy effects, can form simple solid solution structures, and do not appear complex intermetallic compounds. The number of phases obtained is far lower than...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C30/00C22F1/00
CPCC22C1/03C22C30/00C22F1/00C22F1/002
Inventor 廖恒成黄艾婧周军陈浩
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap