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High-entropy alloy powder and preparation method thereof and high-entropy alloy laser cladding layer and preparation method thereof

A high-entropy alloy and laser cladding technology, applied in the field of high-entropy alloy, can solve the problem of limited melting amount of matrix material, low corrosion resistance of high-entropy alloy laser cladding layer, reducing the dilution rate of matrix material and deformation of thin-walled parts, etc. problem, to achieve the effect of excellent corrosion resistance

Active Publication Date: 2022-08-09
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
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  • Application Information

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Problems solved by technology

This means that the powder material enters the molten pool in a liquid state rather than in a solid particle state, so the cladding layer will be more uniform, and the amount of laser melting to the base material is very limited, only a few microns deep on the surface, rather than The millimeter scale can effectively reduce the dilution rate of the base material and the deformation of thin-walled parts, but the corrosion resistance of the prepared high-entropy alloy laser cladding layer is low

Method used

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  • High-entropy alloy powder and preparation method thereof and high-entropy alloy laser cladding layer and preparation method thereof
  • High-entropy alloy powder and preparation method thereof and high-entropy alloy laser cladding layer and preparation method thereof
  • High-entropy alloy powder and preparation method thereof and high-entropy alloy laser cladding layer and preparation method thereof

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preparation example Construction

[0036] The present invention also provides the preparation method of the high-entropy alloy powder according to the above technical solution, comprising the following steps:

[0037] (1) melting raw material to obtain alloy melt;

[0038](2) subjecting the alloy melt obtained in the step (1) to gas atomization and powdering to obtain high-entropy alloy powder.

[0039] In the present invention, the raw materials are melted to obtain an alloy melt.

[0040] The source of the raw material is not particularly limited in the present invention, and it can be prepared by using a commercially available product or a well-known preparation method well known to those skilled in the art.

[0041] In the present invention, the melting temperature is preferably 1600 to 2000°C, more preferably 1800 to 1900°C. The present invention has no special limitation on the melting time, as long as it is ensured that each raw material is completely melted.

[0042] In the present invention, the mel...

Embodiment 1

[0062] The chemical composition of the high-entropy alloy powder is calculated in atomic percentage: Fe 10%, Al 20%, Cr 20%, Ti25% and Zr25%; the particle size is 15-100 μm;

[0063] The preparation method of high-entropy alloy powder is as follows:

[0064] (1) The raw material is subjected to high-frequency induction melting to obtain an alloy melt; wherein, the melting temperature is 1600 ° C; the melting heating power current is 30A;

[0065] (2) The alloy melt obtained in the step (1) is gas-atomized and powdered in argon, and dried in a vacuum drying oven to obtain high-entropy alloy powder; wherein, the pressure of gas-atomized powder production is 0.5 MPa; the drying temperature is 100°C and the time is 1h.

Embodiment 2

[0067] The preparation steps of the high-entropy alloy laser cladding layer are as follows:

[0068] After grinding the Zr-4 metal rotor substrate and wiping it with ethanol, the high-entropy alloy powder prepared in Example 1 was put into the barrel of the powder feeder. The ultra-high-speed laser cladding technology was used to prepare a high-entropy alloy with a thickness of 150 μm on the surface of the substrate. Alloy laser cladding layer; among them, the process parameters of ultra-high-speed laser cladding technology are: the axial rotation speed of the rotor is 150r / min, the laser power is 1800W, the scanning line speed is 40m / min, the width of a single track is 1.0mm, The lap rate is 75%, the powder feeding amount is 6g / min, and the defocusing amount is 3mm; the ultra-high-speed laser cladding technology is carried out in an argon atmosphere; the flow rate of the argon gas is 18L / min; the laser cladding head is adjusted , so that it is perpendicular to the axial direc...

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Abstract

The invention provides high-entropy alloy powder, a preparation method of the high-entropy alloy powder, a high-entropy alloy laser cladding layer and a preparation method of the high-entropy alloy laser cladding layer, and belongs to the technical field of high-entropy alloys. The invention provides high-entropy alloy powder. The high-entropy alloy powder comprises the following chemical components in atomic percent: 10-40% of Fe, 13-20% of Al, 10-20% of Cr, 14-25% of Ti and 10-25% of Zr. The high-entropy alloy is designed and prepared by regulating and controlling the proportion of the five components including Fe, Al, Cr, Ti and Zr, and the high-entropy alloy has excellent corrosion resistance by controlling the content of the five components. Experimental results show that the corrosion performance of an ultrahigh-speed laser cladding coating prepared from the high-entropy alloy powder provided by the invention in a 3.5% NaCl solution is superior to that of 316 stainless steel.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloys, in particular to a high-entropy alloy powder and a preparation method thereof, and a high-entropy alloy laser cladding layer and a preparation method thereof. Background technique [0002] As a new type of high-performance metal materials, high-entropy alloys have attracted extensive attention of researchers in recent years. It is easy to form a simple cubic solid solution structure due to lattice distortion, kinetic diffusion hysteresis and "cocktail" effect, and has important application prospects in aerospace, nuclear power generation, surface engineering, and military fields. High-entropy alloys have excellent mechanical, chemical and thermophysical properties, especially refractory high-entropy alloys show higher high-temperature mechanical properties than traditional Ni-based superalloys, such as VNbMoTaW high-entropy alloys. These refractory high-entropy alloys also have excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F1/00B22F9/08C23C24/10
CPCC22C30/00B22F1/00B22F9/082C23C24/106C22C16/00Y02P10/25
Inventor 李晋锋黄留飞任聪聪王小英王斗
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS