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Amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation

A technology of pulsed electron beam and laser cladding, which is applied in coating, metal material coating process, etc., to achieve the effect of avoiding coating oxidation, improving hardness and wear resistance, and enriching deformation structure

Inactive Publication Date: 2021-07-09
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing amorphous coatings based on laser cladding and pulsed electron beam irradiation for the defects in the preparation of amorphous coatings by existing laser cladding technology

Method used

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  • Amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation
  • Amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation
  • Amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First dry the zirconium powder with a particle size of 200 mesh in a vacuum environment at 50°C for 12 h, then weigh 75.87 g of Zr powder, 11.37 g of Ni powder, 3.79 g of Al powder, and 8.94 g of Cu powder with a particle size of 200 mesh, and add them into a ball mill and mix them for 2 h to obtain the powder for laser cladding. Mix powder. A 702 zirconium block sample with a size of 20×20×10 mm was taken, and the surface was roughly ground with 180-mesh metallographic sandpaper, then cleaned with acetone to remove oil stains, wiped clean, then wiped with alcohol, and dried to obtain a preliminary sample. Treated zirconium alloy matrix material.

[0034] The surface-treated zirconium alloy samples were placed on the laser cladding workbench for use, and argon was used as the shielding gas.

[0035] Using the laser cladding method of pre-set powder, the mixed alloy powder is pre-laid on the surface of the substrate, and the laser cladding process parameters are adjuste...

Embodiment 2

[0043] Taking the matrix and powder in Example 1, adjust the laser cladding process parameters as follows: laser power 1200W, spot diameter 4mm, scan speed 5mm / s. Under laser energy irradiation, a coating that is metallurgically bonded to the substrate is formed on the surface of the zirconium alloy.

[0044] The pulsed electron beam treatment was performed on the coating after cladding, and the parameters of the pulsed electron beam were the same as those in Example 1.

[0045] According to the test method of Example 1, the hardness and wear resistance of the cladding layer were detected. Hardness curve such as figure 1 As shown, the wear rate results are as figure 2 shown.

Embodiment 3

[0047] Taking the matrix and powder in Example 1, adjust the laser cladding process parameters as follows: laser power 2500W, spot diameter 4mm, scanning speed 5mm / s. Under laser energy irradiation, a coating that is metallurgically bonded to the substrate is formed on the surface of the zirconium alloy.

[0048] The pulsed electron beam treatment was performed on the coating after cladding, and the parameters of the pulsed electron beam were the same as those in Example 1.

[0049] According to the test method of Example 1, the hardness and wear resistance of the cladding layer were detected. Hardness curve such as figure 1 As shown, the wear rate results are as figure 2 shown.

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Abstract

The invention discloses an amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation. The preparation method comprises the following steps of firstly, preparing a ZrNiAlCu coating on the surface of a matrix through a laser cladding technology, and then carrying out purification treatment on the surface of the coating by using pulsed electron beam HCPEB irradiation. According to the method, the amorphous content of the alloy coating is increased by utilizing the characteristics of energy concentration, high efficiency, easiness in control and the like of HCPEB irradiation treatment. The surface densification of the laser cladding coating and the homogenization of the cladding alloy are achieved, so that the wear resistance and corrosion resistance are improved. According to the method, ultrafine and even nano-scale refinement of crystal grains on the surface layer of the cladding layer can be further achieved, so that the wear resistance and corrosion resistance of the cladding layer are improved.

Description

technical field [0001] The present invention relates to a high-current pulsed electron beam irradiation modification method for laser cladding coatings, in particular to an amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation, which belongs to alloy surface treatment field. Background technique [0002] Zirconium alloys are solid solutions of zirconium or other metals. Zirconium has a very low thermal neutron absorption cross-section, high hardness, ductility and corrosion resistance. It is mainly used in the field of nuclear technology, such as fuel rods in nuclear reactors. Zirconium alloys cannot meet the requirements of nuclear fuel cladding and pressure tubes in terms of their strength, wear resistance and corrosion resistance. Zirconium is easy to absorb hydrogen, nitrogen and oxygen; zirconium has a strong affinity for oxygen and can easily react with oxygen. [0003] In recent years, researchers at home and abroad have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C23F4/00C22F3/00C22C45/10
CPCC23C24/106C23F4/00C22F3/00C22C45/10
Inventor 李玉新刘思远陈博文白培康赵占勇关庆丰蔡杰
Owner ZHONGBEI UNIV
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