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Method for improving zirconium-based or titanium-based amorphous alloy surface hardness through laser irradiation in nitrogen

An amorphous alloy, laser irradiation technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problem of surface hardness reduction, achieve strong practicability, simple implementation process and high efficiency. Effect

Active Publication Date: 2018-09-18
JILIN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the surface hardness of zirconium-based or titanium-based amorphous alloys by laser irradiation in nitrogen gas, so as to solve the problem that the surface hardness of amorphous alloys is significantly reduced by the existing laser irradiation method

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  • Method for improving zirconium-based or titanium-based amorphous alloy surface hardness through laser irradiation in nitrogen
  • Method for improving zirconium-based or titanium-based amorphous alloy surface hardness through laser irradiation in nitrogen
  • Method for improving zirconium-based or titanium-based amorphous alloy surface hardness through laser irradiation in nitrogen

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Embodiment

[0024] With a typical zirconium-based amorphous alloy (Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 be 22.5 ) as an example, nanosecond laser irradiation was carried out in argon and nitrogen atmospheres, and the implementation process and beneficial effects of the present invention were further compared and illustrated in conjunction with the following examples.

[0025] image 3 When the average laser power is 0.422W, the scanning speed is 1mm / s, the overlapping rate of adjacent scanning lines is 47%, the number of repeated scanning is 1 time, and the nitrogen pressure is 0.05MPa, after nanosecond laser irradiation on the surface of zirconium-based amorphous alloy, The indentation curve and hardness value obtained by nano-indentation test on the polished surface and the original surface can be seen that after laser irradiation in an argon atmosphere, the surface hardness is reduced by 0.9GPa compared with the original surface, which is 14% lower than that of the original surface. %, i...

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Abstract

The invention relates to a method for improving zirconium-based or titanium-based amorphous alloy surface hardness through laser irradiation in nitrogen, and belongs to the technical field of amorphous alloy surface modification. Chemical affinity of the zirconium or titanium element and the nitrogen element under the high temperature or other conditions is used, nanosecond laser irradiation is carried out on the zirconium-based or titanium-based amorphous alloy surface in the nitrogen atmosphere, a nitriding phase (zirconium nitride or titanium nitride) is led into an amorphous parent phase of the surface of a zirconium-based or titanium-based amorphous alloy, and the surface hardness of the zirconium-based or titanium-based amorphous alloy is improved. The method effectively solves the problem that when the amorphous alloy surface is treated through an existing laser irradiation method, the surface hardness of the amorphous alloy is obviously reduced. Laser irradiation parameters arechanged, so that regulation and control of the content of the nitriding phase on the amorphous alloy surface are conveniently achieved, and regulation and control of the zirconium-based or titanium-based amorphous alloy surface hardness are achieved. The method is simple in implementation process, high in efficiency and high in practicability, the method can be used for regulating and controllingthe zirconium-based or titanium-based amorphous alloy surface hardness, and function application of the zirconium-based or titanium-based amorphous alloy is strengthened.

Description

technical field [0001] The invention relates to the technical field of surface modification of amorphous alloys, in particular to a method for improving the surface hardness of zirconium-based or titanium-based amorphous alloys by laser irradiation in nitrogen. It can be applied to control the surface hardness of zirconium-based or titanium-based amorphous alloys and enhance their functional applications. Background technique [0002] Due to its long-range disordered structure, amorphous alloys exhibit better mechanical, physical and chemical properties than conventional crystalline materials, such as high hardness, strength, elasticity, low elastic modulus, and excellent soft magnetic properties. Good wear resistance and corrosion resistance have attracted continuous attention from the scientific and industrial circles. Although amorphous alloys are very promising structural and functional materials, the problem of catastrophic fracture of most amorphous alloys due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/02C22F1/18C23C8/24
CPCC22F1/02C22F1/183C22F1/186C23C8/24
Inventor 黄虎
Owner JILIN UNIV
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