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High-entropy alloy powder for spray coating and preparation method thereof, as well as composite material and preparation method thereof

A high-entropy alloy and composite material technology, which is applied in the fields of high-entropy alloy powder and its preparation for spraying, composite materials and its preparation, can solve problems such as difficulty in forming uniform alloys, achieve improved quality, great application prospects, and reduced oxygen content. Effect

Inactive Publication Date: 2015-04-29
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that the existing high-entropy alloys for spraying are difficult to form uniform alloys, the present invention provides a high-strength, high-hardness, corrosion-resistant high-entropy alloy powder for spraying, its preparation method, composite material and its Preparation

Method used

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  • High-entropy alloy powder for spray coating and preparation method thereof, as well as composite material and preparation method thereof
  • High-entropy alloy powder for spray coating and preparation method thereof, as well as composite material and preparation method thereof

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preparation example Construction

[0021] The present invention also provides a method for preparing the high-entropy alloy powder alloy for spraying according to the present invention, the method comprising:

[0022] 1) Preparation of master alloy ingots: After melting the high-entropy alloy raw materials in a vacuum melting furnace, they are cooled and formed. The high-entropy alloy raw materials include Cr, Fe, Co, Ni, Al, M and R;

[0023] 2) Preparation of alloy powder: put the ingot of the master alloy obtained in step 1) into an atomization device for atomization and pulverization to obtain the high-entropy alloy powder of the present invention.

[0024] The high-entropy alloy of the present invention can be prepared by vacuum induction melting to prepare master alloy ingots, and then powder can be prepared by atomization powder making technology. Such as nitrogen, argon, etc.

[0025] According to the preparation method provided by the present invention, preferably, the vacuum degree of the vacuum melt...

Embodiment 1

[0034] 1. Preparation of high entropy alloy powder

[0035] According to Cr 16.5 Fe 16.5 Ni 16.5 co 16.5 al 16.5 Ti 8 Cu 8.5 Y carries out alloy proportioning, and all metal elemental elements adopt industrial-grade purity products, and the purity is greater than 99%. Among them, Cr adopts NiCr master alloy.

[0036]After the alloy ratio is completed, put it into a vacuum melting furnace, vacuumize to 10Pa, and fill it with 99.99% argon for atmosphere protection, and carry out alloy smelting. The smelting temperature is 1400°C, and the smelting time is 30Min. The body is cast into a mold to obtain a metal casting rod with a diameter of 60 mm and a length of 50 cm.

[0037] Put the master alloy casting rod into the atomization equipment as a consumable electrode, close the furnace body, evacuate to 0.01Pa, and fill it with 99.99% argon gas for atmosphere protection, and at the same time, argon gas is introduced through the ring nozzle, and the air flow The pressure is 2...

Embodiment 2

[0041] 1. Preparation of high entropy alloy powder

[0042] According to Cr 16.5 Fe 16.5 Ni 16.5 co 16.5 Al 16.5 Ti 8 Cu 8.5 La 0.5 Ce 0.5 For alloy proportioning, all metal elemental elements should be industrial-grade purity products with a purity greater than 99%, and Cr should be NiCr master alloy.

[0043] After the alloy ratio is completed, put it into a vacuum melting furnace, vacuumize to 10Pa, and fill it with 99.99% argon for atmosphere protection, and carry out alloy smelting. The smelting temperature is 1300°C, and the smelting time is 30Min. The body is cast into a mold to obtain a metal casting rod with a diameter of 60 mm and a length of 50 cm.

[0044] Put the master alloy casting rod into the atomization equipment as a consumable electrode, close the furnace body, evacuate to 0.01Pa, and fill it with 99.99% argon gas for atmosphere protection, and at the same time, argon gas is introduced through the ring nozzle, and the air flow The pressure is 0.6M...

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Abstract

The invention provides high-entropy alloy powder for spray coating. The high-entropy alloy powder is composed of CraFebCocNidAleMfRg, wherein a, b, c, d, e, f, g are atomic percentages, a, b, c, d, e, f are nearly equal atomic percentages, g is larger than 0 and is smaller than 1, and a+b+c+d+e+f+g is equal to 100; M is at least one of Ti, HF, Mn and Cu; and R is at least one of rare earth elements. The invention further provides a preparation method of the high-entropy alloy powder, a composite material obtained by spray coating of the high-entropy alloy powder and a preparation method of the composite material. The high-entropy alloy coating provided by the invention has the advantages of high strength and low manufacturing cost, and has hardness and excellent adhesive force much better than those of traditional alloys, thereby being an excellent wear-resistant material and having a great application prospect.

Description

technical field [0001] The invention relates to the field of high-entropy alloys, in particular to a high-entropy alloy powder for spraying and a preparation method thereof, a composite material and a preparation method thereof. Background technique [0002] High-entropy alloys are a new type of alloy system developed on the basis of bulk amorphous alloys. It breaks through the design concept of traditional alloys with one or two elements as the main components. Equiatomic ratio or close to equiatomic ratio alloying, in which each element occupies a higher percentage, and no element has an atomic percentage of more than 50%, which can be regarded as a composite material on the atomic scale, giving full play to the synergistic effect of each component The characteristics make the alloy obtain high strength, high hardness, high corrosion resistance, high heat resistance, special electrical and magnetic properties and other characteristics, and have a wide range of application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C09D5/46
CPCB22F2009/0844
Inventor 张法亮宫清
Owner BYD CO LTD
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