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Zirconium-contained high-hardness, corrosion-resistant, high-entropy alloy material and preparation method thereof

A high-entropy alloy and high-hardness technology is applied in the field of high-hardness corrosion-resistant high-entropy alloy materials and their preparation, which can solve the problems of low room temperature hardness and restrict the application of structural materials, and achieve the effect of improving mechanical properties and good corrosion resistance.

Inactive Publication Date: 2020-07-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CoCrFeNi-based high-entropy alloys suffer from low hardness at room temperature, which limits their application as structural materials.

Method used

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  • Zirconium-contained high-hardness, corrosion-resistant, high-entropy alloy material and preparation method thereof
  • Zirconium-contained high-hardness, corrosion-resistant, high-entropy alloy material and preparation method thereof

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Embodiment 1

[0026] A zirconium-containing high-entropy alloy in this embodiment is composed of five elements: Co, Cr, Fe, Ni and Zr, wherein the molar ratio of Co:Cr:Fe:Ni:Zr is 1:1:1 :1:0.48.

[0027] First, high-purity cobalt, chromium, iron, nickel and zirconium blocks are used as raw materials, and the surface oxide scale is removed by mechanical grinding, and then put into absolute ethanol for ultrasonic cleaning and dried to obtain pure metal after cleaning. Raw materials: The cleaned metal raw materials are accurately weighed according to the molar ratio of Co:Cr:Fe:Ni:Zr 1:1:1:1:0.47. Put the weighed raw materials into the electric arc melting furnace in order of melting point from low to high, among which the element with the lowest melting point is placed at the bottom, the element with the highest melting point is placed at the top, and the pure titanium ingot is placed in the middle In a water-cooled copper crucible, close the furnace door after placing it; vacuumize the samp...

Embodiment 2

[0030] A zirconium-containing high-entropy alloy in this embodiment is composed of five elements: Co, Cr, Fe, Ni and Zr, wherein the molar ratio of Co:Cr:Fe:Ni:Zr is 1:1:1 :1:0.55.

[0031] First, high-purity cobalt, chromium, iron, nickel and zirconium blocks are used as raw materials, and the surface oxide scale is removed by mechanical grinding, and then put into absolute ethanol for ultrasonic cleaning and dried to obtain pure metal after cleaning. Raw materials: The cleaned metal raw materials are accurately weighed according to the molar ratio of Co:Cr:Fe:Ni:Zr 1:1:1:1:0.55. Put the weighed raw materials into the electric arc melting furnace in order of melting point from low to high, among which the element with the lowest melting point is placed at the bottom, the element with the highest melting point is placed at the top, and the pure titanium ingot is placed in the middle In a water-cooled copper crucible, close the furnace door after placing it; vacuumize the samp...

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Abstract

The invention relates to a zirconium-contained high-hardness, corrosion-resistant, high-entropy alloy material and a preparation method thereof, and belongs to the field of high-entropy alloys. A modified high-entropy alloy is prepared from cobalt, chromium, iron, nickel and zirconium, and is recorded as CoCrFeNiZrx (0.4<=x<=0.6) in atomic ratio; and the alloy has a dual-phase structure of a face-centered cubic phase (FCC phase) and a Laves phase. The high-entropy alloy with high hardness and excellent corrosion resistance is prepared through a non-consumable vacuum arc smelting process, and the application requirements of excellent corrosion-resistant structural materials required for future marine resource development and transportation infrastructure construction are met. The preparation process includes cleaning, material weighing, smelting and heat treatment of alloy raw materials. The CoCrFeNiZrx high-entropy alloy prepared by the preparation method has the dual-phase structure of the face-centered cubic phase and the Laves phase, has the characteristics of higher hardness and better corrosion resistance in the marine environment compared with 304 stainless steel, and has broad application prospects in the field of engineering structural materials.

Description

technical field [0001] The invention relates to a zirconium-containing high-hardness, corrosion-resistant high-entropy alloy material and a preparation method thereof, belonging to the technical field of new metal materials. Background technique [0002] With the depletion of land resources, human survival and development will increasingly rely on the ocean, and countries have identified the development of marine resources, the development of marine economy and marine industry as the main direction of current and future economic development. Among them, the development of marine engineering equipment manufacturing industry has increasingly become the key and guarantee for the development of marine resources and the comprehensive development of marine economy. Due to the harsh service environment of high humidity and high salt spray in the ocean, metal corrosion is a problem that must be solved in the development of marine resources and the construction of transportation infr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/10
CPCC22C1/02C22C19/07C22C30/00C22F1/10
Inventor 王文瑞祁武谢璐张佳明
Owner UNIV OF SCI & TECH BEIJING
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