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High-entropy alloy containing aluminum and iron components suitable for additive manufacturing and modification method thereof

A high-entropy alloy and additive manufacturing technology, which is applied in the field of additive manufacturing, can solve problems such as the difficulty in obtaining amorphous structures, and achieve the effects of simple modification methods, low modification costs, and improved mechanical properties

Inactive Publication Date: 2020-03-24
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a modification method for high-entropy alloy powder containing aluminum and iron, which is used to solve the problem that it is difficult to obtain an amorphous structure after the powder material of the aluminum-iron-based high-entropy alloy system is additively manufactured, and satisfies the requirements of the high-entropy alloy powder. The need for additive manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The present invention is further described by taking the preparation of beryllium-modified Al22Fe24Co15Ni16Ti23 high-entropy alloy powder as an example.

[0040] Its preparation process comprises the following steps:

[0041] S1: Ingredients: Alloy raw materials use high-purity metals such as aluminum, iron, cobalt, nickel, and titanium. Grind and polish the surface oxide layer before feeding, put it in a vacuum drying oven and dry it at 120°C for 3 hours, and set it aside. At the same time, take high-purity beryllium beads for use, in which aluminum and iron elements account for 46% of the weight percentage of the high-entropy alloy;

[0042] S2: Melting and atomizing powder making, adding the dried raw materials into the crucible of the melting chamber, and putting the beryllium beads into the secondary feeding port.

[0043] Start the vacuum system, evacuate the melting chamber and spray chamber to 10Pa, and then fill it with argon to atmospheric pressure.

[0044]...

Embodiment 2

[0051] The present invention is further described by taking the preparation of beryllium-modified Al20Fe16Cr18Ni22Mn24 high-entropy alloy powder as an example.

[0052] Its preparation process comprises the following steps:

[0053] S1: Ingredients: Aluminum, iron, chromium, nickel, manganese high-purity metals are used as alloy raw materials, the surface oxide layer is polished and polished before feeding, put in a vacuum drying oven for 4 hours at 120°C, and set aside, and weigh high-purity beryllium beads at the same time Standby, wherein the aluminum and iron elements account for 36% of the high-entropy alloy weight percentage;

[0054] S2: Melting and atomizing powder making, adding the dried raw materials into the crucible of the melting chamber, and putting the beryllium beads into the secondary feeding port.

[0055] Start the vacuum system, evacuate the melting chamber and spray chamber to 50Pa, and then fill it with argon to atmospheric pressure.

[0056] Start the...

Embodiment 3

[0063] The present invention is further described by taking the preparation of beryllium-modified Al20Fe16Cr18Ni22Mn24 high-entropy alloy powder as an example.

[0064] Its preparation process comprises the following steps:

[0065] S1: Ingredients: Aluminum, iron, chromium, nickel, manganese high-purity metals are used as alloy raw materials. Grind and polish the surface oxide layer before feeding, put it in a vacuum drying oven and dry it at 120°C for 3 hours, and set it aside. At the same time, take high-purity beryllium beads for use, wherein aluminum and iron elements account for 36% of the weight percentage of the high-entropy alloy;

[0066] S2: Melting and atomizing powder making, adding the dried raw materials into the crucible of the melting chamber, and putting the beryllium beads into the secondary feeding port.

[0067] Start the vacuum system, evacuate the melting chamber and spray chamber to 50Pa, and then fill it with argon to atmospheric pressure.

[0068] S...

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Abstract

The invention provides a modification method of a high-entropy alloy containing aluminum and iron components suitable for additive manufacturing. The method comprises the following steps of: S1: proportioning: preparing high-purity metals and beryllium, wherein the high-purity metals are 4-5 of aluminum, iron, cobalt, chromium, nickel, manganese and titanium, and the aluminum and iron elements account for 40-50 wt% of the high-entropy alloy; and S2, smelting and atomizing to prepare powder, namely smelting high-purity metal and beryllium, and performing atomizing to prepare powder to obtain powder, wherein the smelting temperature is 1100-1300 DEG C, heat preservation is conducted for 15-35 min, after deterioration, atomization is conducted, and beryllium is high-purity beryllium beads. The modification method of the aluminum-iron-based high-entropy alloy powder material is simple, modification can be completed only by adding beryllium as a modified alloy element in the process of preparing the aluminum-iron-based high-entropy alloy powder, and the modification cost is low; and moreover, an amorphous structure can be obtained through additive manufacturing of the modified aluminum-iron-based high-entropy alloy powder material, the density of a formed high-entropy alloy product can reach 99.9% or above, and the requirement for high-entropy alloy additive manufacturing is met.

Description

technical field [0001] The invention relates to the field of additive manufacturing, and relates to a method for modifying a high-entropy alloy containing aluminum-iron components and a high-entropy alloy suitable for additive manufacturing. Background technique [0002] High-entropy Alloys (High-entropy Alloys), referred to as HEA, is an alloy formed of five or more equal or approximately equal amounts of metals. Because high-entropy alloys may have many desirable properties, they have received considerable attention in materials science and engineering. There may be only one or two main metal components in previous alloys. For example, based on iron, some trace elements are added to improve its characteristics, so the resulting alloy is mainly iron. In the past concept, if more metals are added to the alloy, the material will be embrittled, but the high-entropy alloy is different from the previous alloys, there are many kinds of metals but it will not be embrittled, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B22F3/105C22C30/00C21D1/18C22F1/16B33Y10/00B33Y40/20B33Y70/00
CPCB22F9/082C22C30/00C22C38/105C22C38/14C22C38/06C22C22/00C21D1/18C22F1/16C22F1/002B33Y10/00B33Y40/00B33Y70/00B22F2009/0824B22F2009/0848B22F2009/0844B22F10/00B22F1/05B22F10/36B22F10/34B22F10/64B22F10/20Y02P10/25
Inventor 李晓庚宰雄飞周朝辉
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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