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High-entropy alloy powder material for supersonic spraying and manufacturing method thereof

A technology of supersonic spraying and high-entropy alloy, applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of powder sphericity is not high, not suitable for spraying materials, etc., to achieve low porosity, containing The effect of low oxygen content and improved wear resistance

Active Publication Date: 2013-04-24
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 high-entropy alloy powder prepared by gas atomization rapid solidification technology can be used for spraying. Entropy alloy powder materials have not been reported yet

Method used

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  • High-entropy alloy powder material for supersonic spraying and manufacturing method thereof
  • High-entropy alloy powder material for supersonic spraying and manufacturing method thereof
  • High-entropy alloy powder material for supersonic spraying and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] 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 is 18.1%, Fe is 16.7%, Co is 16.4%, Ni is 16.2%, and Cr is 17.2% , Mo is 15.4%, put into the corundum crucible in order of melting point from low to high, and then vacuumize until the vacuum degree is lower than 2.5×10 -3 MPa, filled with argon, the argon pressure is 2×10 -2 The smelting starts under the condition of Pa, the smelting current is 80A, the smelting time is 20min, 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.

[0023] 2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment to melt, and form a metal liquid flow with a diameter of 5mm, and at the same...

Embodiment 2

[0026] 1) Weigh the metal raw materials that remove impurities and oxide films by equal atomic percentages, the total percentage is 100%, of which Al is 16.7%, Fe is 16.7%, Co is 16.7%, Ni is 16.7%, Cr is 16.6%, Mo is 16.6%, put them into corundum crucibles in order of melting point from low to high, and then evacuate until the vacuum degree is lower than 2.5×10 -3 MPa, filled with argon, the argon pressure is 2×10 -2 The smelting starts under the condition of Pa, the smelting current is 76A, the smelting time is 20min, 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.

[0027] 2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment until it melts, and form a metal liquid flow with a diameter of 6mm. At the same time, nitrogen gas is introd...

Embodiment 3

[0030] 1) Remove impurities and oxide films on the surface of metal raw materials, weigh according to atomic percentages Al: 10%, Fe: 18%, Co: 18%, Ni: 18%, Cr: 18%, Mo: 18%, and 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 2.5×10 -3 MPa, filled with argon, the argon pressure is 2×10 -2 The smelting starts under the condition of Pa, the smelting current is 78A, and the smelting time is 22min. 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.

[0031] 2) Heat the high-entropy alloy master alloy with the induction coil in the atomization equipment until it melts, and form a metal liquid flow with a diameter of 6mm. At the same time, nitrogen gas is introduced through...

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Abstract

The invention relates to a high-entropy alloy powder material for supersonic spraying and a manufacturing method thereof. The high-entropy alloy powder material for the supersonic spraying can be obtained and is characterized in that the high-entropy alloy powder material comprises, by atomic percent, 10-20% of Al, 15-20% of Fe, 15-20% of Co, 15-20% of Ni, 15-20% of Cr and 15-20% of Cr, and total percent is 100%. The high-entropy alloy powder material is made by a gas atomization rapid solidification process. Particles of high-entropy alloy powder are spherical or ellipsoidal, a phase structure is composed of a solid solution phase with a simple face-centered cubic or body-centered cubic structure, ingredients and tissues are even, alloy solid solubility is high, and segregation is small. The manufacturing method of the high-entropy alloy powder material is controllable in powder size, good in mobility, low in oxygen content, small in environment pollution, high-entropy alloy coating with excellent combination property or a block high-entropy alloy material with more excellent performance can be obtained through a supersonic spraying process.

Description

technical field [0001] The invention relates to an alloy powder material for supersonic spraying and a preparation method thereof. Background technique [0002] High-entropy alloys are a new type of alloy system developed on the basis of bulk amorphous alloys. It breaks through the design concept of traditional alloys with one or two elements as the main components, and consists of no less than 5 main elements. , in which each element occupies a relatively high percentage, and no atomic percentage of any element exceeds 50%, which can be regarded as a composite material on the atomic scale, giving full play to the characteristics of the synergistic effect of each component, so that the alloy obtains high strength, high Hardness, high corrosion resistance, high heat resistance, special electrical and magnetic properties, etc., have a wide range of application prospects. At present, high-entropy alloy powder materials have been prepared by mechanical alloying method, but due ...

Claims

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Application Information

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IPC IPC(8): B22F1/00C23C4/08B22F9/08C22C30/00C23C4/073
Inventor 朱胜王晓明杜文博王启伟姚巨坤殷凤良曹勇韩国峰张晓刘玉项李显鹏
Owner ACADEMY OF ARMORED FORCES ENG PLA
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