Ni-Co-Fe-B series eutectic high-entropy alloy and preparation method and application thereof

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: 2021-09-28
CHINA UNIV OF MINING & TECH
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  • Abstract
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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 prepar

Method used

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  • Ni-Co-Fe-B series eutectic high-entropy alloy and preparation method and application thereof
  • Ni-Co-Fe-B series eutectic high-entropy alloy and preparation method and application thereof
  • Ni-Co-Fe-B series eutectic high-entropy alloy and preparation method and application thereof

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Experimental program
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preparation example Construction

[0026] Preparation method of Ni-Co-Fe-B-index high entropy alloy, including the following steps:

[0027] (1) A physical method or chemical method is used to remove the surface of the alloy raw material, and the raw material of ethanol is used for 15 to 20 min; wherein the physical method is sandpaper grinding, sand blast, sand blast, laser clearance one or more, chemical method is Upturing acid washing, spray acid washing, one or more of the rust method of acid paste; the purity of alloy raw materials is 99.5 to 100%.

[0028] (2) Put the alloy raw material in the quartz test tube in the suspended mesencing furnace according to each component of the eutectic high entropy alloy;

[0029] (3) Treatment of vacuum to 6 × 10 to be suspended -3 PA ~ 5 × 10 -3 The Pa was filled with argon and the furnace gas pressure reached 0.05 ~ 0.06 MPa.

[0030] (4) Sollow the eutectic high entropy alloy having an eutectic layer tissue.

[0031] In the present invention, the ratio of the non-metall...

Embodiment 1

[0035] An eutectic high entropy alloy, its component massage is Ni a CO b FE c B d M e , M is trace element. Among them, A = 36.5%, b = 36.5%, C = 7%, D = 20%, E = 0%, Ni 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 Preparation method, including the following steps:

[0037] (1) Remove the surface oxide skin of the raw material using sandpaper, and the use of ethanol ultrasonic cleaning alloy is 15 min;

[0038] (2) According to the contriction high entropy alloy Ni 36.5 CO 36.5 FE 7 B 20 The proportion of each component, put alloy raw materials in the quartz test tube in suspended melting furnace;

[0039] (3) Treatment to the vacuum to 6 × 10 -3 The Pae is filled with argon and the furnace is at 0.05 MPa;

[0040] (4) Smelting, obtaining a uniform tissue component uniform eutectic high entropy alloy Ni 36.5 CO 36.5 FE 7 B 20 .

[0041] In the above-mentioned alloy component, the alloy properties are made in Table 1, and the alloy vis...

Embodiment 2

[0045] An eutectic high entropy alloy, its component massage is Ni a CO b FE c B d M e , M is trace element. Among them, A = 37.5%, B = 37.5%, C = 7%, D = 18%, E = 0%, ie Ni 37.5 CO 37.5 FE 7 B 18 .

[0046] Eutectic high entropy alloy Ni 37.5 CO37.5 FE 7 B 18 Preparation method, including the following steps:

[0047] (1) Remove the surface oxide skin of the raw material using sandpaper and use ethanol ultrasonic cleaning alloy raw materials for 20 min;

[0048] (2) According to the contriction high entropy alloy Ni 37.5 CO 37.5 FE 7 B 18 The proportion of each component, put alloy raw materials in the quartz test tube in suspended melting furnace;

[0049] (3) Treatment to the vacuum to 6 × 10 -3 The Pae is filled with argon and the furnace is at 0.05 MPa;

[0050] (4) Smelting to obtain a highly crystal high entropy alloy from the homogeneous component.

[0051] The alloy properties of the alloy component decreased, as shown in Table 2, the alloy viscosity prepared in this exam...

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Abstract

The invention discloses a Ni-Co-Fe-B series eutectic high-entropy alloy and a preparation method thereof. The alloy component of the eutectic high-entropy alloy is NiaCobFecBdMe, M is a trace element, a, b, c, d and e are respectively molar percentages of corresponding elements, a is greater than 15%, b is greater than 15%, c is greater than or equal to 5% and less than or equal to 10%, d is greater than or equal to 10% and less than or equal to 25%, e is greater than or equal to 0%, and a + b + c + d + e = 100. The eutectic high-entropy alloy is prepared by adopting a suspension smelting method. The eutectic high-entropy alloy is of an eutectic lamellar structure, a nonmetal principal element plays an important role in an eutectic system, and the eutectic high-entropy alloy is small in lamellar spacing, strong, good in plasticity matching, excellent in mechanical property, high in fluidity, excellent in casting performance and wide in application prospect in the fields of aerospace, mechanical industry and the like.

Description

Technical field [0001] The present invention relates to the field of high entropy alloy, and more particularly to an eutectic high entropy alloy and a preparation method thereof. Background technique [0002] The high entropy alloy (HEAS) breaks the traditional alloy design concept, which is a new alloy composed of a multi-main element element, but most of the high high entropy alloy fluidity and variable castability, ingredients are uneven, which is not conducive to high entropy alloy. Large application. The eutectic high entropy alloy (EHEAS) can simultaneously have the characteristics of high entropy alloys and eutectic alloys, reduce casting defects, and improve casting performance. [0003] The application publication code is disclosed as a "one hyperbited eutectic high entropy alloy and its preparation method thereof", which is published, is published, is therefore an ultra-fine crystal high entropy alloy. 1.0 CR 1.0 CO x FE y Ni z Mn i M j . Among them, M is one or more of...

Claims

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Application Information

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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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