Unlock instant, AI-driven research and patent intelligence for your innovation.

a cocrnizr x Eutectic high entropy alloy and preparation method thereof

A technology of high-entropy alloys and alloys, which is applied in the fields of reducing greenhouse gases, nuclear power generation, and climate sustainability. It can solve the problems of limited engineering applications and low yield strength, and achieve the effects of increased strength, simple process, and uniform microstructure.

Active Publication Date: 2022-08-09
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low yield strength of CoCrNi medium entropy alloys at room temperature limits its further engineering applications.

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 cocrnizr <sub>x</sub> Eutectic high entropy alloy and preparation method thereof
  • a cocrnizr <sub>x</sub> Eutectic high entropy alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of CoCrNiZr is prepared by the method of the present invention x Eutectic high-entropy alloy and preparation method thereof, whose chemical composition is expressed as CoCrNiZr 0.2 , the mass of the alloy ingot is 60g, the CoCrNiZr 0.2 Hypoeutectic high-entropy alloy and preparation method thereof are as follows:

[0026] Step 1: Use sandpapers of different purposes (400#, 600#, 1000#, 1500#, 2000#) to remove oxides and impurities on the surface of the elemental raw materials, and place them in a mixture of water and alcohol for ultrasonic cleaning for 15 minutes; in a drying box Dry for 1 hour; weigh the pretreated metal elements according to the molar ratio of 1:1:1:0.2 respectively, and their weights are: Co: 18.82g, Cr: 16.61g, Ni: 18.74g, Zr: 5.83g; symmetrical A good amount of the elemental raw materials of each element are separately bagged for smelting.

[0027] Step 2: Place each prepared elemental raw material in three different reactors from bottom ...

Embodiment 2

[0035] A kind of CoCrNiZr is prepared by the method of the present invention x Eutectic high-entropy alloy and preparation method thereof, whose chemical composition is expressed as CoCrNiZr 0.4 , the mass of the alloy ingot is 60g, the CoCrNiZr .0.4 The hypereutectic high-entropy alloy and its preparation method are as follows:

[0036] Step 1: Use sandpapers of different purposes (400#, 600#, 1000#, 1500#, 2000#) to remove oxides and impurities on the surface of the elemental raw materials, and place them in a mixture of water and alcohol for ultrasonic cleaning for 15 minutes; in a drying box Dry for 1 hour; weigh the pretreated metal elements according to the molar ratio of 1:1:1:0.2, and their weights are: Co: 17.15g, Cr: 15.14g, Ni: 17.09g, Zr: 10.62g; symmetrical A good amount of the elemental raw materials of each element are separately bagged for smelting.

[0037] Step 2: Place each prepared elemental raw material in three different copper reactors from bottom to ...

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

No PUM Login to View More

Abstract

The present invention proposes a CoCrNiZr x A eutectic high-entropy alloy and a preparation method thereof, wherein the molar ratio of each element in the eutectic high-entropy alloy is 1:1:1:x (0.2≤x≤0.6). Eutectic high-entropy alloys with eutectic structure with different compositions were designed and prepared by adjusting the content of Zr element. When 0.2≤x<0.3, it was a hypoeutectic high-entropy alloy; when 0.3≤x≤0.35, it was a eutectic high-entropy alloy. Entropy alloy; when 0.35<x≤0.6, it is a hypereutectic high-entropy alloy. The high-entropy alloy preparation method of the present invention is as follows: grinding the metal elemental raw material with sandpaper to remove surface oxides and impurities, then cleaning and drying, and weighing the pretreated elemental raw material according to the molar ratio. Before smelting, smelting Ti blocks to remove residual oxygen molecules, then smelting Co-Ni binary alloy and Cr-Zr binary alloy 2-3 times respectively, and finally smelting Co-Cr-Ni-Zr eutectic 3-5 times as a whole A high-entropy alloy is obtained to obtain an ellipsoidal alloy ingot. The alloy structure of the invention is uniform, and the eutectic structure is a continuous network structure.

Description

technical field [0001] The invention relates to the field of metal alloy materials and preparation thereof, in particular to a CoCrNiZr x Eutectic high entropy alloy and preparation method thereof. Background technique [0002] Eutectic high-entropy alloys have the outstanding characteristics of traditional single-phase high-entropy alloys and eutectic alloys, and have a series of excellent properties such as good fluidity, relatively uniform solidification structure, controllable structure, and small casting defects, and have broad potential applications. prospect. [0003] The CoCrNi medium-entropy alloy increases both plasticity and strength at low temperature, and has outstanding low-temperature mechanical properties, which overcomes the problem of plasticity reduction of traditional alloys at low temperature. However, the low yield strength of CoCrNi medium-entropy alloys at room temperature limits its further engineering applications. [0004] Based on the character...

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): C22C30/00C22C1/02C22F1/00
CPCC22C30/00C22C1/02C22F1/00Y02E30/30
Inventor 仝永刚张浩胡永乐张显程梁秀兵程江波杨玲伟邓吨英
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY