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Method for laser cladding of high-entropy alloy coating on copper surface

A high-entropy alloy and laser cladding technology, applied in the direction of metal material coating process, coating, etc., can solve the problem of insufficient surface strengthening performance of pure copper, and achieve the effect of high strength, hardness and strength improvement.

Pending Publication Date: 2021-11-09
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of insufficient surface strengthening performance of pure copper, and proposes a laser cladding preparation AlMoTiMnCr x Zr y A Coating Method for High Entropy Alloys, AlMoTiMnCr by Design x Zr y High entropy alloy coating has excellent mechanical properties such as wear resistance, strength and hardness

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  • Method for laser cladding of high-entropy alloy coating on copper surface
  • Method for laser cladding of high-entropy alloy coating on copper surface
  • Method for laser cladding of high-entropy alloy coating on copper surface

Examples

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Embodiment 1

[0032] Laser cladding AlMoTiMnCr on a copper surface x Zr y A method for coating a high-entropy alloy comprising the steps of:

[0033] (1) AlMoTiMnCr x Zr y Preparation of high entropy alloy powder:

[0034] Pre-cut Al, Mo, Ti, Mn, Cr, Zr metal blocks into small pieces, use sandpaper to remove the oxide layer on the surface of the material, wipe it clean with anhydrous ethanol, and use an electronic balance to weigh the ratio in equal proportions. Al, Mo, Ti, Mn, Cr and Zr have the same mole fraction (x=1, y=1). Vacuum arc melting equipment is used to repeatedly smelt metal blocks to make the composition of alloy ingots uniform. The resulting smelted balls were crushed and pulverized with a vibration mill for 30 seconds. The particles are sieved through a 200-mesh sieve to obtain AlMoTiMnCrZr high-entropy alloy powder with a particle size smaller than 74 μm.

[0035] (2) Surface pretreatment of pure copper substrate:

[0036] Pure copper is selected as the substrate, ...

Embodiment 2

[0046] Laser cladding AlMoTiMnCr on a copper surface x Zr y A method for coating a high-entropy alloy comprising the steps of:

[0047] (1) AlMoTiMnCr x Zr y Preparation of high entropy alloy powder:

[0048] Pre-cut the metal blocks of Al, Mo, Ti, Mn, Cr, and Zr into small pieces, use sandpaper to remove the oxide layer on the surface of the material, wipe it clean with absolute ethanol, and use an electronic balance to weigh the ratio in equal proportions. , Mo, Ti, Mn and Cr have the same mole fraction, and the Zr content is 0 (x=1, y=0). Vacuum arc melting equipment is used to repeatedly smelt metal blocks to make the composition of alloy ingots uniform. The obtained smelting balls were crushed, crushed with a vibrating mill for 30 seconds, and sieved through a 200-mesh sieve to obtain AlMoTiMnCr high-entropy alloy powder with a particle size of less than 74 μm.

[0049] (2) Surface pretreatment of pure copper substrate:

[0050] Pure copper is selected as the substra...

Embodiment 3

[0059] Laser cladding AlMoTiMnCr on a copper surface x Zr y A method for coating a high-entropy alloy comprising the steps of:

[0060] (1) AlMoTiMnCr x Zr y Preparation of high entropy alloy powder:

[0061] Cut each metal block of Al, Mo, Ti, Mn, Cr, and Zr into small pieces in advance, use sandpaper to remove the oxide layer on the surface of the material, wipe it clean with absolute ethanol, and use an electronic balance to weigh the ratio of Al, Mo, Ti, Mn and Zr have the same mole fraction, and the Cr content is 0 (x=0, y=1). Vacuum arc melting equipment is used to repeatedly smelt metal blocks to make the composition of alloy ingots uniform. The obtained smelting balls were crushed, crushed with a vibrating mill for 30 seconds, and sieved with a 200-mesh sieve to obtain AlMoTiMnZr high-entropy alloy powder with a particle size smaller than 74 μm.

[0062] (2) Surface pretreatment of pure copper substrate:

[0063] Pure copper is selected as the substrate, and the...

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Abstract

The invention discloses a method for laser cladding of a high-entropy alloy coating on a copper surface, and belongs to the technical field of metal material surface modification. The method comprises the following steps of (1) treating Al, Mo, Ti, Mn, Cr and Zr metal blocks, preparing a high-entropy alloy ingot through electric arc melting, crushing and screening alloy powder with proper particle size; (2) preparing a workpiece, and pretreating the surface of a pure copper base body; (3) adding a binder added into AlMoTiMnCrxZry high-entropy alloy powder to be mixed into paste, coating the surface of the cleaned base body with the paste in advance, and then putting the workpiece into a drying box to be dried; and (4) carrying out laser cladding on the prefabricated coating by utilizing an optical fiber laser and selecting proper laser processing parameters under the protection of argon, and then grinding and polishing. The relative content of the BCC phase and the FCC phase is controlled by adjusting the content of a Cr element and a Zr element in the alloy, so that the alloy with both strength and toughness is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal material surface modification, and relates to a method of laser cladding AlMoTiMnCr on the surface of pure copper x Zr y A method for coating high-entropy alloys. Background technique [0002] Pure copper has good electrical and thermal conductivity and excellent plasticity and toughness, but its strength, hardness and wear resistance are poor, which limits its wide range of applications. Therefore, it is considered to prepare a coating on the surface of pure copper to improve its mechanical properties. [0003] High-entropy alloys are generally considered to be alloys containing at least five major elements, each in a concentration between 5 and 35%. In liquid or random solid solution state, they have higher entropy of mixing than conventional alloys. In addition, they also have four core effects that affect the microstructure and properties: high entropy, slow diffusion, severe lattice distort...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 战再吉史鹏飞曹海要
Owner YANSHAN UNIV
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