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A kind of high-entropy alloy resistant to corrosion of molten aluminum and preparation method thereof

A high-entropy alloy and refractory technology, applied in the field of high-entropy alloys, can solve problems such as shortened service life, impact on product quality and production efficiency, and corrosion

Active Publication Date: 2021-09-10
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will cause serious corrosion to metals and metal oxides, resulting in production equipment failure due to corrosion, shortened service life, and seriously affecting product quality and production efficiency. It can be said that the corrosion resistance of metal materials to molten aluminum is a key factor restricting the development of the aluminum industry

Method used

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  • A kind of high-entropy alloy resistant to corrosion of molten aluminum and preparation method thereof
  • A kind of high-entropy alloy resistant to corrosion of molten aluminum and preparation method thereof
  • A kind of high-entropy alloy resistant to corrosion of molten aluminum and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: AlCoFeNiTi high entropy alloy (x=0)

[0060] AlCoFeNiTi high entropy alloy preparation method comprises the following steps:

[0061] 1. Pretreatment

[0062] Al, Co, Fe, Ni, Ti are all materials with a purity not lower than 99.9%. Separately wash and dry granular or massive Al, Co, Fe, Ni, Ti, Cr. The cleaning method is an example of aluminum. Add acetone solution to a beaker containing aluminum particles, use ultrasonic cleaning for 15 to 30 minutes, then add ethanol to the beaker, and use ultrasonic cleaning for 15 to 30 minutes, and finally put the sample in a drying oven for drying. Treat Co, Ni, Fe, Ti and Cr in the same way for smelting.

[0063] 2. Ingredients

[0064] Use a photoelectric analytical balance with an accuracy of 0.1 mg to weigh appropriate amounts of Al, Co, Fe, Ni, and Ti according to the ratio shown in Table 1, and mix them to obtain a material mixture, that is, the molar ratio of Al, Co, Fe, Ni, and Ti It is: 1:1:1:1:1, where Al...

Embodiment 2

[0083] Example 2: AlCoFeNiTiCr 1.5 High Entropy Alloy (x=1.5)

[0084] AlCoFeNiTiCr 1.5 The preparation method of high entropy alloy comprises the following steps:

[0085] 1. Pretreatment

[0086] Al, Co, Ni, Fe, Ti and Cr all use materials with a purity not lower than 99.9%. Separately wash and dry granular or bulk Al, Co, Ni, Fe, Ti and Cr. The cleaning method is an example of aluminum. Add acetone solution to a beaker containing aluminum particles, use ultrasonic cleaning for 15 to 30 minutes, then add ethanol to the beaker, and use ultrasonic cleaning for 15 to 30 minutes, and finally put the sample in a drying oven for drying. Co, Ni, Fe, Ti and Cr raw materials are processed in the same way. for smelting.

[0087] 2. Ingredients

[0088] Use a photoelectric analytical balance with an accuracy of 0.1 mg to weigh appropriate amounts of Al, Co, Ni, Fe, Ti, and Cr according to the ratio shown in Table 4, and mix them to obtain a material mixture, that is, Al, Co, Ni,...

Embodiment 3

[0106] al 0.5 CoCrFeNi high entropy alloy melting method:

[0107] al 0.5 CoCrFeNi is the molar ratio Al: Co: Cr: Fe: Ni = 0.5:1:1:1:1;

[0108] The smelting method is as follows: repeatedly turn and smelt the material mixture 5 times, each smelting time is 9 to 10 minutes, and each smelting includes: the arcing current is 30A and kept for 1min, then the current is raised to 60A and kept for 0.5min, and then the current Boost to 90A and hold. In this way, the melting of the high-entropy alloy is completed. Will Al 0.5 The CoCrFeNi high-entropy alloy was smoothed and polished with sandpaper, and then placed in a tube furnace at 900°C for 20 hours of heat preservation and oxidation, and then cooled with the furnace. 0.5 Al formation on the surface of CoCrFeNi high-entropy alloy 0.5 CoCrFeNi high-entropy alloy oxide film, obtained after pre-oxidation Al 0.5 CoCrFeNi high entropy alloy. The corrosion rate measured in 700 molten aluminum solution for 12 hours is 3.2×10 -3 ...

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Abstract

The invention discloses a high-entropy alloy resistant to melting aluminum corrosion and a preparation method thereof. The high-entropy alloy resistant to melting aluminum corrosion is formed by mixing and melting Al, Co, Ni, Fe, Ti and Cr; wherein, Al, The molar ratio of Co, Ni, Fe, Ti and Cr is A1: A2: A3: A4: A5: X; A1, A2, A3, A4, A5 are any value in 0.9~1.1; The value range of X is 0~1.5. The high-entropy alloy of the invention has excellent corrosion resistance to molten aluminum and long service life.

Description

technical field [0001] The invention belongs to the field of molten aluminum corrosion-resistant materials, in particular to a high-entropy alloy resistant to molten aluminum corrosion. Background technique [0002] Aluminum and aluminum alloys are widely used in aerospace, transportation, energy, electric power and other fields because of their good mechanical properties, high specific strength, excellent fatigue and corrosion resistance, and good electrical conductivity. Hot-dip aluminum plating is an efficient protection process developed after hot-dip galvanizing. Whether it is aluminum smelting, die-casting, or hot-dip plating, aluminum liquid and aluminum alloy melts are involved. Due to its high reactivity, molten aluminum is one of the most corrosive metals. It will cause serious corrosion to metals and metal oxides, resulting in production equipment failure due to corrosion, shortened service life, and seriously affecting product quality and production efficiency....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C30/00
CPCC22C1/02C22C30/00
Inventor 尹付成余文强王鑫铭欧阳雪枚
Owner XIANGTAN UNIV
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