Device for accelerating nanocrystallization of impact surfaces of metal round spheres by beating

Abstract

The invention provides a novel method and device for the nanocrystallization of surfaces to solve the problems of small machining area, long process time, complex equipment structure and the like. According to the technology, a simple power device is adopted for providing enough kinetic energy for a large number of small hard metal round spheres so that the round spheres can continuously impact the surface of a machined sample at a certain speed, severe plastic deformation happens on a certain depth region of the surface of the sample; the impact of the metal round spheres on the sample embodies certain uniform clustered spreadability, thereby the severe plastic deformation of the surface of a material is ensured to generally and relatively occur, the nanocrystallization modification of the surface of the material is realized, the special microstructure with gradient distributed grain sizes is obtained, and the performance of the material is increased. Simultaneously, the investment cost and the complexity level of the technology implementing device are reduced to the greatest extend, the range of service environments of the material is widened, and the industrial application process is promoted.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to a device for realizing the nanometerization of the material surface, which is mainly applied to various metals and alloy materials, etc., so as to realize the severe plastic deformation within a certain thickness range of the surface of these materials, so as to control and optimize its Organizational structure, forming a nanoscale surface layer, improving its performance. Background technique [0002] With the emergence and development of nanotechnology at the end of the 20th century, nanocrystalline materials with a structure scale of 1-100nm have attracted more and more attention. Their special compact structure and excellent performance have made people explore the road of high-performance materials. I saw hope. In the field of metal materials science, the structure and performance of the material surface are very important to itself. Generally, the instability...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a new surface self-nanometerization method and its equipment for the existing surface nanotechnology, such as small processing area, long process time, and complex equipment structure. The power device provides enough kinetic energy for a large number of hard small metal balls, so that the balls continuously hit the surface of the processed sample at a certain speed, and the material in a certain depth area on the sample surface undergoes severe plastic deformation. The impact of the sample shows a certain uniform cluster coverage, so as to ensure the occurrence of severe plastic deformation on the surface of the material, which realizes the nano-modification of the material surface, obtains a special microstructure with a gradient distribution of grain size, and improves its own performance.

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