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Method for greatly improving surface hardness of zirconium-based amorphous alloy through laser irradiation

A zirconium-based amorphous alloy, surface hardness technology, applied in metal material coating process, coating, solid diffusion coating and other directions, to achieve the effect of simple method, high efficiency and easy implementation

Active Publication Date: 2021-08-20
JILIN UNIV
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Problems solved by technology

However, up to now, this method has only increased the surface hardness of amorphous alloys by 15.7% due to no parameter optimization

Method used

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  • Method for greatly improving surface hardness of zirconium-based amorphous alloy through laser irradiation
  • Method for greatly improving surface hardness of zirconium-based amorphous alloy through laser irradiation
  • Method for greatly improving surface hardness of zirconium-based amorphous alloy through laser irradiation

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Embodiment 1

[0032] This example is used to illustrate the method of greatly improving the surface hardness of zirconium-based amorphous alloy by laser irradiation of the present invention.

[0033] Choose a Zr41.2Ti13.8Cu12.5Ni10Be22.5 amorphous alloy block with a thickness of 2 mm, and polish the surface, use 400, 800, 1200 and 2000 sandpaper to polish, and then polish with 0.5 micron diamond particle polishing paste To mirror smooth, clean the surface with alcohol. Place the block sample in a cuboid cavity that can be fed with nitrogen, with the mirror facing upwards, using a nanosecond laser with a wavelength of 1064nm, a focused spot diameter of 43μm, and a pulse width of 10ns. Perform nanosecond laser treatment.

[0034] figure 2 After laser irradiation under the test conditions of average laser power of 12.1W, scanning speed of 10mm / s, overlapping rate of adjacent scanning lines of 10%, and laser irradiation times of 3, the surface after irradiation is obtained Compared with the...

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Abstract

The invention provides a method for greatly improving the surface hardness of a zirconium-based amorphous alloy through laser irradiation, and belongs to the technical field of amorphous alloy surface modification. The method comprises the steps that nanosecond laser irradiation is conducted on the surface of the zirconium-based amorphous alloy in a nitrogen environment, a zirconium nitride phase is introduced, laser parameters are optimized through orthogonal experiment design to regulate and control the content of the zirconium nitride phase, then the surface hardness of the amorphous alloy is controlled, and the surface hardness of the amorphous alloy irradiated under the optimized experiment parameters is greatly improved. According to the method, the number of times of orthogonal test design tests is small, data distribution is uniform, and test errors are reduced to the maximum extent; the method is high in efficiency, simple, easy to implement, high in practicability and economical; and the hardness can be regulated ad controlled, and the surface hardness of the zirconium-based amorphous alloy can be changed by adjusting the laser irradiation parameters, so that the practical application of the zirconium-based amorphous alloy is enhanced.

Description

technical field [0001] The invention relates to the technical field of surface modification of amorphous alloys, in particular to a method for greatly improving the surface hardness of zirconium-based amorphous alloys by laser irradiation. The orthogonal test design of the invention has many advantages such as high efficiency, uniform data distribution, simple method, easy implementation and strong practicability. Background technique [0002] The large cooling rate of metal elements in the liquid phase makes amorphous alloys have no crystal atomic structure, no grain boundaries and dislocation defects, so amorphous alloys have excellent properties, such as high strength, high elasticity, and strong corrosion resistance. These characteristics make amorphous alloys have potential applications in aerospace, precision machinery, military weapons and other fields. However, amorphous alloys are prone to highly localized shear band deformation under tensile loading, which limits ...

Claims

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Application Information

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IPC IPC(8): C23C8/24
CPCC23C8/24
Inventor 黄虎洪婧钱永峰王超崔明明刘翰林
Owner JILIN UNIV
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