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High-entropy alloy powder with low nitrogen content as well as preparation method and application thereof

A high-entropy alloy and nitrogen content technology, which is applied in the field of additive manufacturing, can solve the problems of excessive N content in powder, reduce powder quality, and adverse effects on alloy properties, etc., achieve low N content, easy operation, and improve mechanical properties and product quality. Effect

Active Publication Date: 2018-11-13
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the smelting process of high-entropy alloys with high content of the above elements, if the content of N is not strictly controlled, it will be brought into the alloy liquid during atomization, which will eventually cause the N content of the powder to exceed the standard, greatly reducing the quality of the powder. adverse effect on the properties of the alloy

Method used

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  • High-entropy alloy powder with low nitrogen content as well as preparation method and application thereof
  • High-entropy alloy powder with low nitrogen content as well as preparation method and application thereof
  • High-entropy alloy powder with low nitrogen content as well as preparation method and application thereof

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preparation example Construction

[0023] The preparation method of the high-entropy alloy powder with low nitrogen content provided by the embodiment of the present invention comprises the following steps:

[0024] Carrying out the first smelting and the first refining of the material providing the elements of the first element group in the raw material of the high-entropy alloy, and then adding the material providing the elements of the second element group for the second refining and the third refining, and then Pouring atomization.

[0025] Wherein, the first element group includes at least two of Ta, Co, W, Mo, Fe, Ni, Cr, Cu, Ce, Re and Nb. The second element group includes at least one of Ti, B, Zr, Mn and Al.

[0026] In some preferred embodiments, the purity of the material providing any one element in the first element group and the second element group is ≥90%. More preferably, the purity of the above-mentioned materials is ≥99%; optimally, the purity of the above-mentioned materials is ≥99.9%.

...

Embodiment 1

[0051] The chemical formula of the high-entropy alloy powder with low nitrogen content for 3D printing provided in this example is: AlNiNbTa0.5TiZr, and 150 kg of the alloy is smelted in a single furnace.

[0052] The preparation method includes as follows:

[0053] 1. Raw material preparation: Polish off the oxides and attached sundries on the surface of the required alloy raw materials until the metallic luster appears. Then put in alcohol or acetone solution and use ultrasonic cleaning for 25 minutes, after cleaning, put it into an oven at 60°C for 10 hours of drying.

[0054] 2. Arrangement of charge: Before smelting, distribute materials in the crucible in a specific order, and add 1 / 3 of Ni chips, all Ta strips and the remaining 2 / 3 of Ni blocks in sequence.

[0055] 3. The first smelting: use a vacuum induction furnace for smelting. When the vacuum in the furnace reaches ≤5Pa, start heating with 10kW power to remove the gas attached to the raw material. When the vacuum...

Embodiment 2

[0062] The chemical formula of the high-entropy alloy powder with low nitrogen content for 3D printing provided in this example is: CoCrNiFeTiAl, and 150 kg of the alloy is smelted in a single furnace.

[0063] The preparation method includes as follows:

[0064] 1. Raw material preparation: Polish off the oxides and attached sundries on the surface of the required alloy raw materials until the metallic luster appears. Then put in alcohol or acetone solution and use ultrasonic cleaning for 35 minutes, after cleaning, put it into an oven at 80°C for 8 hours of drying.

[0065] 2. Arrangement of charge: before smelting, it is necessary to distribute materials in the crucible according to a specific order, and then add 1 / 3 of Ni chips, all Co blocks, Fe blocks, and the remaining 2 / 3 of Ni blocks.

[0066] 3. The first smelting: use a vacuum induction furnace for smelting. When the vacuum degree in the furnace reaches ≤5Pa, start heating with 40kW power to remove the gas attached...

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Abstract

The invention relates to high-entropy alloy powder with low nitrogen content as well as a preparation method and application thereof and belongs to the field of additive manufacturing. The preparationmethod comprises the following steps: carrying out first-time smelting and second-time smelting on a material for providing the element of a first element group for high-entropy alloy raw material, adding the material for providing the element of a second element group, carrying out second-time smelting and third-time smelting, and then pouring and atomizing. The first element group comprises atleast two selected from Ta, Co, W, Mo, Fe, Ni, Cr, Cu, Ce, Re and Nb; and the second element group comprises at least one selected from TI, B, Zr, Mn and Al. The preparation method is simple and convenient to operate and easy to realize and has a high denitrification effect. The high-entropy alloy powder obtained through the preparation method is low in nitrogen content and is used for 3D printingto improve the mechanical property and product quality of a formed component.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, and in particular to a high-entropy alloy powder with low nitrogen content and its preparation method and application. Background technique [0002] 3D printing (additive manufacturing) technology has become one of the most concerned emerging technologies in the world. Its special materials, especially special powder materials for direct laser manufacturing of high-performance metal components, have great development prospects. In terms of 3D printing rapid prototyping, the development and production of more versatile materials is the key to technological improvement. [0003] At present, high-entropy alloys have broken through the development framework of traditional alloys based on one or two metal elements, and are a new alloy design concept. Generally, it can be defined as a type of alloy composed of five or more elemental components alloyed according to the equiatomic ratio o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B33Y70/00
CPCB22F1/0003B22F9/082B22F2009/0848B33Y70/00
Inventor 曾克里李响翁廷宗伟宋信强朱杰李志罗浩周晚珠宋仁金潘超梅
Owner GUANGDONG INST OF NEW MATERIALS
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