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High-corrosion-resistance non-equimolar high-entropy alloy and preparation method thereof

A technology of high-entropy alloy and high corrosion resistance, which is applied in the field of molar high-entropy alloy and its preparation, can solve the problems of difficult control of volatile elements and poor alloy performance, and achieve uniform metallographic structure, excellent corrosion resistance, high efficiency effect

Inactive Publication Date: 2021-12-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a series of advantages such as high alloy purity, high alloy yield, and prevention of foreign inclusions, but it also has disadvantages such as difficult control of volatile elements. shrinkage, there will be a series of problems such as internal stress and shrinkage cavity, resulting in poor performance of the final alloy

Method used

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  • High-corrosion-resistance non-equimolar high-entropy alloy and preparation method thereof
  • High-corrosion-resistance non-equimolar high-entropy alloy and preparation method thereof
  • High-corrosion-resistance non-equimolar high-entropy alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the Ni-Fe-Cr-Ru-Mo-W corrosion-resistant high-entropy alloy is composed of Ni, Fe, Cr, Ru, Mo, W, and each component is constituted by mass percentage: Ni: 33.3 wt.%, Fe: 16.31wt.%, Cr: 16.68wt.%, Ru: 19.62wt.%, Mo: 8.6wt.%, W: 5.49wt.%.

[0030] The particle size of the original powder is: except the particle size of Ru powder is 100 microns, the particle size of other Ni, Fe, Cr, Mo, W powders are all 35-45 microns.

[0031] In the present embodiment, the preparation method of 30-40-1050 (the serial number represents ball milling for 30 hours, the sintering pressure is 40Mpa, and the sintering temperature is 1050°C) corrosion-resistant high-entropy alloy comprises the following steps:

[0032] Step 1: Ingredients

[0033] Weigh the six kinds of metal powders of Ni, Fe, Cr, Ru, Mo, and W according to the above mass ratio and transfer them to a ball milling tank lined with polytetrafluoroethylene with a capacity of 500mL;

[0034] Step 2: Ball Mill...

Embodiment 2

[0042]In this embodiment, the Ni-Fe-Cr-Ru-Mo-W corrosion-resistant high-entropy alloy is composed of Ni, Fe, Cr, Ru, Mo, W, and each component is constituted by mass percentage: Ni: 33.3 wt.%, Fe: 16.31wt.%, Cr: 16.68wt.%, Ru: 19.62wt.%, Mo: 8.6wt.%, W: 5.49wt.%.

[0043] The particle size of the original powder is: except the particle size of Ru powder is 100 microns, the particle size of other Ni, Fe, Cr, Mo, W powders are all 35-45 microns.

[0044] In this embodiment, the preparation method of 40-40-1050 (this number represents ball milling for 40 hours, the sintering pressure is 40Mpa, and the sintering temperature is 1050°C) corrosion-resistant high-entropy alloy comprises the following steps:

[0045] Step 1: Ingredients

[0046] Weigh the six kinds of metal powders of Ni, Fe, Cr, Ru, Mo, and W according to the above mass ratio and transfer them to a ball milling tank lined with polytetrafluoroethylene with a capacity of 500mL;

[0047] Step 2: Ball Milling

[0048] ...

Embodiment 3

[0053] In this embodiment, the Ni-Fe-Cr-Ru-Mo-W corrosion-resistant high-entropy alloy is composed of Ni, Fe, Cr, Ru, Mo, W, and each component is constituted by mass percentage: Ni: 33.3 wt.%, Fe: 16.31wt.%, Cr: 16.68wt.%, Ru: 19.62wt.%, Mo: 8.6wt.%, W: 5.49wt.%.

[0054] The particle size of the original powder is: except the particle size of Ru powder is 100 microns, the particle size of other Ni, Fe, Cr, Mo, W powders are all 35-45 microns.

[0055] In the present embodiment, the preparation method of 50-40-1050 (the serial number represents ball milling for 40 hours, the sintering pressure is 40Mpa, and the sintering temperature is 1050°C) corrosion-resistant high-entropy alloy comprises the following steps:

[0056] Step 1: Ingredients

[0057] Weigh the six kinds of metal powders of Ni, Fe, Cr, Ru, Mo, and W according to the above mass ratio and transfer them to a ball milling tank lined with polytetrafluoroethylene with a capacity of 500mL;

[0058] Step 2: Ball Mill...

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Abstract

The invention discloses a high-corrosion-resistance non-equimolar high-entropy alloy and a preparation method thereof. The NiFeCrRuMoW high-entropy alloy comprises the following components: Ni, Fe, Cr, Ru, Mo and W. Mechanical alloying is implemented through mechanical powder mixing and ball milling, then the NiFeCrRuMoW corrosion-resistant high-entropy alloy material with good comprehensive performance is prepared through spark plasma sintering, and the NiFeCrRuMoW corrosion-resistant high-entropy alloy material is uniform in structure and good in strength, hardness and other performance. In order to explore the optimal preparation conditions, an orthogonal experimental method is selected to carry out three-factor three-level variable design, and the factors are ball milling time, sintering pressure and sintering temperature. According to the finally prepared optimal alloy, the compressive strength is higher than 2, 000 Mpa, the yield strength is higher than 1, 100 Mpa, the hardness is larger than 550 HV, the corrosion rate is only 0.1107 mm / year, and the corrosion resistance is extremely excellent. In addition, the alloy is simple in preparation process and easy for industrial production, and can be used as a structural material of a nuclear waste storage container in the nuclear power industry.

Description

technical field [0001] The invention relates to a high-corrosion-resistant high-entropy alloy and a preparation method thereof, in particular to a high-corrosion-resistant non-equimolar high-entropy alloy and a preparation method thereof. Background technique [0002] High-entropy alloy is a new type of material prepared with a new alloy design concept. It is different from the traditional alloy design concept that only uses one element as the main body and adds other elements to improve its performance. The characteristics of high-entropy alloys are: principal element The types are five or more, and the content of each pivot is between 5% and 35%, and no pivot is dominant. High-entropy alloys have the advantages of high strength, high hardness, high corrosion resistance, high wear resistance, high temperature resistance and good soft magnetism, and are widely used in chemical pipelines, high-speed cutting tools, golf head striking surfaces, hydraulic pressure rods, Motor c...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/04B22F3/105
CPCC22C30/00C22C19/056C22C1/0433B22F3/105B22F2003/1051
Inventor 杨贺杰孙佳鹏高义民
Owner XI AN JIAOTONG UNIV
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