Device for preparing gradient nanometer layer on surface of metal material by using rolling deformation

Abstract

The invention discloses a device for preparing a gradient nanometer layer on the surface of a metal material by using rolling deformation. The device comprises a rotary working table, a hydraulic system and a roller pressure head, wherein the rotary working table comprises a motor, a base, a working table surface and a fixture; the motor is connected with the working table surface, and is used for driving the rotation of the working table surface; the hydraulic system comprises a hydraulic press, a power system and an electric control system; the roller pressure head comprises a pressure head base, and a rolling needle inlaid in the pressure head base; and the hydraulic press is used for driving the pressure head base and pressing the inlaid rolling needle in the surface of a metal material sample clamped on the fixture. The device has the advantages of easy operation, high safety, no noise pollution and high production efficiency; the treated metal material is uniformly deformed, and is smooth in surface; and the thickness and the crystal grain size of the gradient nanometer layer on the surface of the metal material can be controlled through adjusting such conditions as pressure value, treatment time and treatment temperature, so that the controllable preparation of the gradient nanometer layer is realized.

Description

[0001] technical field [0002] The invention belongs to the technical field of surface film materials, and in particular relates to a device for preparing gradient nano-layers on the surface of metal materials by rolling deformation. Background technique [0003] Since the advent of nanomaterials in the 20th century, they have shown various properties far superior to traditional materials, such as high strength, high diffusion coefficient, high wear resistance, good electrical and magnetic properties, etc., attracting people to continue to explore and research A more excellent method for preparing nanomaterials. However, there are still many deficiencies in the current mainstream preparation methods of bulk metal nanomaterials. The in-situ synthesis method (In-situ Synthesis) has complex process equipment and extremely low output, which is difficult to meet the requirements of performance research and application; strong plastic deformation (Severe Plastic Deformation) me...

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Problems solved by technology

This method has the disadvantages of low production efficiency and difficulty in applying it to engineering practice.

[0008] At the same time, the existing metal material surface nanotechnology, because the deformation mode is relatively complex, the structure parameters such as the thickness of the surface nanolayer and the grain size are more affected. Due to the influence of various process parameters, it is difficult to control the structure of the material and the repeatability of the material performance. At the same time, the thickness of the surface nanolayer is insufficient, so it is difficult to realize the controllable preparation of the surface gradient nanocrystalline layer.

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