Method for forming nanometer gradient structure on surface layer of shaft metallic material

A metal material and gradient structure technology, which is applied in the processing field of plastic deformation on the surface of the material, can solve the problems of difficulty in forming nanocrystalline structure on the surface of the workpiece, poor surface finish, large surface roughness, etc., to achieve uniform force and processing. Simple method and low surface roughness effect
CN102643966BActive Publication Date: 2013-11-06INST OF METAL RESEARCH - CHINESE ACAD OF SCI
6 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2013-11-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a surface treatment method for forming a nanometer gradient structure on a surface layer of a shaft metallic material. The invention aims to solve the problems that the surface roughness of the material to be treated is higher, the surface smoothness is not high and a nanometer crystal structure is difficult to form on the surface of a workpiece in the prior art. A spherical treatment tool is adopted to roll on the surface of the rotary shaft metallic material, and meanwhile, the spherical treatment tool moves along the axial direction of the workpiece, and plastic deformation is generated on the surface layer of the material, so that grains on the surface layer of a workpiece material are refined to form the nanometer gradient structure, wherein the depth of the deformation layer of the nanometer gradient structure reaches 100-300 micrometers; and the grains on the surface layer of the workpiece material are nanometer grains, submicron grains, deformation grains and initial grains in sequence in size from the surface to the inside. According to the processing method provided by the invention, the integral mechanical property of the material is improved through improving the microstructure of the surface layer, thereby, the service life of the material is prolonged. The processing method provided by the invention is small in investment and is simple and convenient in operation.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a surface treatment technology for forming a nanometer gradient structure on the surface of a shaft-like metal material, and in particular provides a processing method for producing plastic deformation on the surface of the material, so that the grain size of the surface layer of the material is sequentially from the surface to the inside of nano-sized grains, sub-micron Size grains, deformed grains and initial grain structure. Background technique

[0002] At present, the methods for forming gradient structures on the surface of shaft-like metal materials mainly include:

[0003] β‘  Surface mechanical grinding treatment method

[0004] The surface mechanical grinding treatment method is to hit the surface of the material being treated by a high-speed moving projectile, resulting in strong plastic deformation on the surface of the material and introducing a large number of defects, such as dislocations, twins, shear bands, etc....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More