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Thermo-mechanical processing method of eutectic high-entropy alloy

A technology of thermo-mechanical treatment and high-entropy alloy, applied in the field of materials, to achieve the effect of promoting the formation of precipitates, improving mechanical properties, and increasing strength

Inactive Publication Date: 2020-01-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of systematic and in-depth research on the thermomechanical processing technology of eutectic high-entropy alloys, and the failure to introduce precipitation strengthening and dislocation strengthening into it, so that there is still a lot of room for improvement in the mechanical properties of high-entropy alloys.

Method used

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Embodiment 1

[0035] Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 A thermomechanical treatment method for eutectic high-entropy alloys, comprising the following steps:

[0036] S1, Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 Preparation of Eutectic High Entropy Alloys

[0037] Alloy ingredients: Use the mechanical grinding method to remove the oxide skin on the surface of the elements of Ni, Co, Fe, Cr, Al, W, then place them in different containers and add alcohol solution, ultrasonic cleaning, take out and dry the alcohol to obtain ultrasonic treatment After the six kinds of raw materials, the six kinds of metal raw materials are pretreated according to Ni 30 co 30 Fe 10 Cr 10 al 18 W 2 Mole percentage weighing of eutectic high-entropy alloy;

[0038] Master alloy smelting: put Ni, Co, Fe, Cr, W raw materials into the crucible of vacuum induction melting furnace, put the preheated steel ingot mold into the furnace, hang Al above the crucible through Ni wire; vacuumize with mechanical pump A...

Embodiment 2

[0047] The method is the same as in Example 1, except that the aging treatment time in S3 is 1 h.

Embodiment 3

[0049] The method is the same as in Example 1, except that the aging treatment time in S3 is 2 hours.

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Abstract

The invention provides a thermo-mechanical processing method for eutectic high-entropy alloy. The method comprises the following steps that S1, rolling and recrystallization treatment is carried out multiple times; and S2, pre-strain and aging treatment is carried out; namely, the eutectic alloy is subjected to the rolling and recrystallization treatment many times, and then is subjected to the pre-strain and aging treatment to obtain the eutectic alloy subjected to thermo-mechanical processing. According to the method, mechanical treatment and multiple heat treatment processes are applied tothe eutectic alloy, interface strengthening, dislocations strengthening and precipitation strengthening are used in combination to obtain the ultrahigh-strength eutectic alloy, and the method has a wide industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a thermomechanical treatment method for eutectic high-entropy alloys. Background technique [0002] High-entropy alloys, referred to as HEA, are alloys obtained by mixing five or more elements in equal or approximately equal proportions. Due to their excellent physical and chemical properties under various conditions, high-entropy alloys have attracted extensive attention in recent years. In traditional alloys, one element is mainly used as a matrix element, such as iron, and some trace elements are added to improve its performance. The traditional theory believes that the mixture of multiple elements will form intermetallic compounds, which will make the material embrittled. High-entropy alloys break through this theoretical understanding and usually exhibit good plasticity. Among them, the eutectic high-entropy alloy is a typical high-entropy alloy with excellent strong-pla...

Claims

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Application Information

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IPC IPC(8): C22F1/00C22C30/00C22C1/03B21B3/02
CPCB21B3/02C22C1/03C22C30/00C22F1/00C22F1/002
Inventor 王志军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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