A kind of ni-co-fe-b system eutectic high-entropy alloy and its preparation method and application

A ni-co-fe-b, high-entropy alloy technology, applied in the field of high-entropy alloys, can solve the problems of poor fluidity and castability of high-entropy alloys, and achieve the effects of good fluidity, excellent casting performance and easy operation

Active Publication Date: 2021-12-21
CHINA UNIV OF MINING & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a Ni-Co-Fe-B eutectic high-entropy alloy and its preparation method and application, so as to solve the problems of poor fluidity and castability of high-entropy alloys

Method used

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  • A kind of ni-co-fe-b system eutectic high-entropy alloy and its preparation method and application
  • A kind of ni-co-fe-b system eutectic high-entropy alloy and its preparation method and application
  • A kind of ni-co-fe-b system eutectic high-entropy alloy and its preparation method and application

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preparation example Construction

[0026] A method for preparing a Ni-Co-Fe-B eutectic high-entropy alloy, comprising the following steps:

[0027] (1) Use physical or chemical methods to remove the oxide skin on the surface of the alloy raw materials, and use ethanol to ultrasonically clean the alloy raw materials for 15 to 20 minutes; wherein, the physical method is one or more of sandpaper grinding, sandblasting, and laser removal, and the chemical method is One or more of immersion pickling method, spray pickling method, and acid paste rust removal method; the purity of the alloy raw material is 99.5-100%.

[0028] (2) according to the ratio of each component of the eutectic high-entropy alloy, the alloy raw material is put into the quartz test tube in the suspension melting furnace;

[0029] (3) Wait until the vacuum degree of the suspension smelting furnace is pumped to 6×10 -3 Pa~5×10 -3 Argon is filled after Pa, and the pressure in the furnace reaches 0.05-0.06MPa.

[0030] (4) Melting to obtain eute...

Embodiment 1

[0035] A eutectic high-entropy alloy whose components are designed as Ni in molar ratio a co b Fe c B d m e , M is a trace element. Among them, a=36.5%, b=36.5%, c=7%, d=20%, e=0%, namely Ni 36.5 co 36.5 Fe 7 B 20 .

[0036] Eutectic high entropy alloy Ni 36.5 co 36.5 Fe 7 B 20 The preparation method comprises the following steps:

[0037] (1) Remove the oxide skin on the surface of the raw material by sandpaper grinding, and use ethanol to ultrasonically clean the alloy raw material for 15 minutes;

[0038] (2) According to the eutectic high entropy alloy Ni 36.5 co 36.5 Fe 7 B 20 Put the alloy raw material into the quartz test tube in the suspension melting furnace;

[0039] (3) To be vacuumed to 6 × 10 -3 Argon is filled after Pa, and the pressure in the furnace reaches 0.05MPa;

[0040] (4) Smelting to obtain eutectic high-entropy alloy Ni with uniform structure composition 36.5 co 36.5 Fe 7 B 20 .

[0041] The properties of the alloy prepared unde...

Embodiment 2

[0045] A eutectic high-entropy alloy whose components are designed as Ni in molar ratio a co b Fe c B d m e , M is a trace element. Among them, a=37.5%, b=37.5%, c=7%, d=18%, e=0%, namely Ni 37.5 co 37.5 Fe 7 B 18 .

[0046] Eutectic high entropy alloy Ni 37.5 co37.5 Fe 7 B 18 The preparation method comprises the following steps:

[0047] (1) Remove the oxide skin on the surface of the raw material by sandpaper grinding, and use ethanol to ultrasonically clean the alloy raw material for 20 minutes;

[0048] (2) According to the eutectic high entropy alloy Ni 37.5 co 37.5 Fe 7 B 18 Put the alloy raw material into the quartz test tube in the suspension melting furnace;

[0049] (3) To be vacuumed to 6 × 10 -3 Argon is filled after Pa, and the pressure in the furnace reaches 0.05MPa;

[0050] (4) Smelting to obtain a eutectic high-entropy alloy with uniform composition.

[0051] The properties of the alloys prepared under the above-mentioned alloy components a...

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Abstract

The invention discloses a Ni-Co-Fe-B eutectic high-entropy alloy and a preparation method thereof. The alloy component of the eutectic high-entropy alloy is Ni a co b Fe c B d m e , M is a trace element, wherein a, b, c, d, e are the molar percentages of corresponding elements, a>15%, b>15%, 5%≤c≤10%, 10≤d≤25%, e≥0%, and a+b+c+d+e=100. The eutectic high-entropy alloy of the invention is prepared by a suspension melting method. The eutectic high-entropy alloy has a eutectic lamellar structure, and the non-metallic principal element plays an important role in the eutectic system. The lamellar spacing is small, strong, and the plasticity is well matched. Casting performance, has broad application prospects in aerospace, machinery industry and other fields.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloys, and in particular relates to a eutectic high-entropy alloy and its preparation method and application. Background technique [0002] High-entropy alloys (HEAs) break the traditional alloy design concept and are new alloys composed of multi-principal elements. Scale application. Eutectic high-entropy alloys (EHEAs) can have the characteristics of both high-entropy alloys and eutectic alloys, reduce casting defects, and improve casting performance. [0003] The invention patent application publication number CN 109750209 A discloses "an ultrafine-grain eutectic high-entropy alloy and its preparation method" discloses an ultra-fine-grain eutectic high-entropy alloy whose general formula is Al 1.0 Cr 1.0 co x Fe y Ni z mn i m j . Wherein, M is one or more of Nb element, Mo element, W element, Ti element, V element, Zr element, Cu element or Si element, 0≤x≤1.2, 0.6≤y≤1.6, z≤3.2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02
Inventor 陈正单彩霞刘猛赵李新王汝江张平顾申翔宇时晓
Owner CHINA UNIV OF MINING & TECH
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