Method and system for amorphizing metal material by adopting ultrafast pulse laser

Abstract

The invention relates to a method and system for amorphizing a metal material by adopting ultrafast pulse laser, and belongs to the technical field of ultrafast pulse laser application. Firstly, an ultrafast laser pulse sequence is focused on a metal crystal in water through an objective lens, an ultrafast pulse laser irradiation area of the metal crystal is melted by regulating and controlling the number and energy flux of ultrafast laser pulses incident on the metal crystal, and rapidly cooling and quenching are carried out to prepare amorphous metal. According to the method and the system,the single pulse energy incident into the metal crystal material is strictly controlled by adjusting a precise attenuation wheel, so that metal is rapidly melted and rapidly cooled, and therefore, thedegree of amorphization can be controlled. The cooling speed of the metal can reach 1012-1013K / s and is faster than that of a conventional processing means, and the new method and the related systemfor realizing the amorphization of the metal are provided. According to the method, the mechanical property and the corrosion resistance of the material are more optimized, so that the amorphous single metal has a wider application prospect.

Description

technical field [0001] The invention relates to a method and system for amorphizing metal materials by using an ultrafast pulse laser, and belongs to the technical field of ultrafast pulse laser applications. Background technique [0002] Amorphous metals exhibit excellent properties such as high yield strength, high hardness, and high wear resistance due to their long-range disordered and short-range ordered atomic arrangement structures, and are widely used in metallurgy, aviation, and material engineering. So far, most of the amorphous structures that people have studied are the amorphous structures of alloys. Because the atomic sizes of different elemental metals are different, the cooling rate of the alloy amorphous structure is low. However, it is difficult to prepare a single metal amorphous structure. Higher, less reported. The patent application "A method for making the surface of titanium alloy amorphous-nano by laser processing" (Chinese patent, application numbe...

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Problems solved by technology

So far, most of the amorphous structures that people have studied are the amorphous structures of alloys. Because the atomic sizes of different elemental metals are different, the cooling rate of the alloy amorphous structure is low. However, it is difficult to prepare a single metal amorphous structure. higher, less reported

The patent application "A method for making the surface of titanium alloy amorphous-nano by laser processing" (Chinese patent, application number: 201410759195.8) discloses a continuous laser scanning method to achieve the amorphous structure of the alloy, but this has been Existing technology cannot achieve rapid heating and rapid cooling, so it cannot be applied to the amorphous preparation of a single metal; the patent application "a method for in-situ amorphization modification of the surface of metal materials" (Chinese patent, application number: 201610583224.9) also introduces The most important is the continuous laser beam to modify the amorphous structure of the alloy metal surface. This method is limited by the composition of the alloy and is limited by the insufficient cooling rate to process the amorphous structure of a single metal.

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