High-entropy alloy powder containing amorphous nanocrystalline and fabrication method thereof

An amorphous nanocrystalline and high-entropy alloy technology is applied in the field of high-entropy alloy powder containing amorphous nanocrystalline and its preparation, which can solve the problems of narrow application range, low powder sphericity, unsuitable for spraying materials, etc. Scope of application, effect of optimizing the structure and properties of alloys

Active Publication Date: 2013-08-21
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, high-entropy alloy powder materials have been prepared by mechanical alloying method, but due to the low sphericity of the powder prepared by mechanical alloying method, it is not suitable for spraying materials, and the application range is narrow. Amorphous and nanocrystalline high-entropy alloy powder materials have not been reported yet

Method used

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  • High-entropy alloy powder containing amorphous nanocrystalline and fabrication method thereof
  • High-entropy alloy powder containing amorphous nanocrystalline and fabrication method thereof
  • High-entropy alloy powder containing amorphous nanocrystalline and fabrication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Weigh the metal raw materials from which impurities and oxide films have been removed by nearly equal atomic percentages, and the total percentage is 100%, of which Al: 14.3%, Fe: 14.3%, Co: 14.3%, Ni: 14.3%, Cr: 14.3% , Mo: 14.3%, Si: 14.2%, the total percentage is 100%, put them into the corundum crucible in order of melting point from low to high, and then evacuate until the air pressure is lower than 6×10 -2 MPa, filled with argon, the argon pressure is 3×10 -2 The smelting starts under the condition of Pa, the smelting current is 75A, the smelting time is 25min, and electromagnetic stirring is introduced to reduce the segregation of alloy components. After the smelting is completed, the alloy solution is cast into the magnesia mold shell to obtain a high-entropy alloy master alloy with uniform composition.

[0018] 2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment to melt, keep overheating, and form a metal liquid ...

Embodiment 2

[0021] 1) Weigh the metal raw materials from which impurities and oxide films have been removed by nearly equal atomic percentages, and the total percentage is 100%, of which Al: 14.3%, Fe: 14.3%, Co: 14.3%, Ni: 14.3%, Cr: 14.3% , Mo: 14.3%, Si: 14.2%, the total percentage is 100%, put them into the corundum crucible in order of melting point from low to high, and then evacuate until the vacuum degree is lower than 6×10 -2 MPa, filled with argon, the argon pressure is 3×10 -2 The smelting starts under the condition of Pa, the smelting current is 75A, the smelting time is 25min, and electromagnetic stirring is introduced to reduce the segregation of alloy components. After the smelting is completed, the alloy solution is cast into the magnesia mold shell to obtain a high-entropy alloy master alloy with uniform composition.

[0022] 2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment to melt, keep overheating, and form a metal liquid...

Embodiment 3

[0025] 1) Weigh the metal raw materials from which impurities and oxide films have been removed by nearly equal atomic percentages, and the total percentage is 100%, of which Al: 14.3%, Fe: 14.3%, Co: 14.3%, Ni: 14.3%, Cr: 14.3% , Mo: 14.3%, Si: 14.2%, the total percentage is 100%, put them into the corundum crucible in order of melting point from low to high, and then evacuate until the vacuum degree is lower than 6×10 -2 MPa, filled with argon, the argon pressure is 3×10 -2 The smelting starts under the condition of Pa, the smelting current is 75A, the smelting time is 25min, and electromagnetic stirring is introduced to reduce the segregation of alloy components. After the smelting is completed, the alloy solution is cast into the magnesia mold shell to obtain a high-entropy alloy master alloy with uniform composition.

[0026]2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment to melt, keep overheating, and form a metal liquid ...

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Abstract

The invention relates to high-entropy alloy powder containing amorphous nanocrystalline and a fabrication method thereof. A high-entropy alloy coating is composed of, by atomic percent, 14.3% of Al, 14.3% of Fe, 14.3% of Co, 14.3% of Ni, 14.3% of Cr, 14.3% of Mo and 14.2% of Si, and the total percentage is 100%. The fabrication method includes the following steps: S1, high-entropy alloy master alloy is fabricated through a medium-frequency induction smelting technique, wherein weighed metallic raw materials are put in a carborundum crucible in sequence and according to melting points from low to high, then the carborundum crucible is vacuumized until the pressure is lower than 6.0*10MPa; argon gas is inflated in the carborundum crucible, the metallic raw materials are melted under the condition that the pressure of the argon air is 3*10-2 Pa, the smelting current is 75A, the melting time is 25min, the alloy composition is segregated with the assistance of electromagnetic stirring, the alloy composition is poured into a magnesia framework after the alloy composition is melted completely, and the high-entropy alloy master alloy which is even in ingredients is obtained; S2, high-entropy alloy powdered materials are fabricated through gas atomization equipment. The fabrication method of the high-entropy alloy powder is used for fabricating the high-entropy alloy coating containing the amorphous nanocrystalline or bulk alloy materials of more superior performance.

Description

technical field [0001] The invention relates to an amorphous and nanocrystalline high-entropy alloy powder and a preparation method thereof, which can be used to prepare high-entropy alloy coatings and bulk materials with superior comprehensive performance. Background technique [0002] High-entropy alloys are a new type of alloy system developed on the basis of bulk amorphous alloys. They are composed of no less than 5 main elements, each of which occupies a high percentage, and there is no atomic percentage of any element More than 50%, it can be regarded as a composite material on the atomic scale, which is easy to form a simple solid solution, and nanophase or even amorphous phase can be precipitated in the cast state, so that the alloy can obtain high strength, high hardness, high corrosion resistance, high heat resistance, Special electrical and magnetic properties and other characteristics have broad application prospects. Gas atomization method is one of the main me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08C22C45/00C22C30/00
Inventor 朱胜杜文博王晓明姚巨坤殷凤良曹勇王启伟李显鹏韩国峰刘玉项
Owner ACADEMY OF ARMORED FORCES ENG PLA
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