Device for self-nanometerization of the surface of rod-shaped metal materials

A metal material, self-nanoization technology, applied in the field of metal material processing, can solve the problems of inability to handle complex shape test pieces, difficulty in working on the back of the test piece, difficulty in ensuring uniformity, etc., to achieve simple and practical equipment construction, uniform processing quality, Overcome the effect of uniform surface treatment
CN104878176BInactive Publication Date: 2017-02-22南通河海大学海洋与近海工程研究院 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南通河海大学海洋与近海工程研究院
Publication Date
2017-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a rod-shaped metal material surface self-nanocrystallization device. The rod-shaped metal material surface self-nanocrystallization device comprises a metal cylinder, a driving device, baffles on the two sides, a baffle adjusting device, fixtures on the two sides and projectiles, wherein the whole metal cylinder is through in a ring shape, no bottom face exists, a closed space is formed between the metal cylinder and the baffles on the two sides, and a projectile loading device is arranged on the metal cylinder; the fixtures on the two sides are attached to the baffles on the two sides respectively, the driving device drives the metal cylinder to conduct high-speed revolution surrounding one point O1 deviated from the circle center in the metal cylinder, and meanwhile the O1 is also the shaft center of the rod-shaped metal to be machined. The rod-shaped metal material surface self-nanocrystallization device has the advantages that a simple mechanical device and a power device are adopted, the surface of a machined sample is uniformly impacted continuously and periodically by a plurality of spherical metal projectiles obtaining enough kinetic energy, therefore, crystalline grains in a certain depth range on the surface of the sample generate violent severe plastic deformation and are refined to a nanometer scale, a special microstructure with the crystalline grain size distributed in a gradient mode is obtained, and finally the material surface nanocrystallization modification is achieved.
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Description

technical field

[0001] The invention relates to a self-nanometerization device on the surface of a rod-shaped metal material, which belongs to the field of metal material processing. Background technique

[0002] Self-nanometerization (SNC) of metallic materials is a brand-new concept first proposed by Lu Ke, Institute of Metal Research, Chinese Academy of Sciences in 1997, that is, to form a surface layer with nanostructures on the surface of the material itself. The nano surface layer has excellent performance and has great industrial application value for the surface modification of traditional engineering materials. At present, the research of surface self-nanoization mainly focuses on the method of mechanical processing.

[0003] The surface machining method mainly refines the grains through surface plastic deformation and dislocation movement, that is, the external load repeatedly acts on the surface of the material, causing the surface structure to produce strong pla...

Claims

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