Application of ultrasonic shot-peening to metal surface alloying

A technology of ultrasonic shot peening and metal surface, applied in metal material coating process, pressure inorganic powder coating, coating, etc., can solve the problems of narrow application area, cumbersome operation, complicated process, etc. Good effect of internal stress and metallographic structure compactness

Active Publication Date: 2016-08-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These include laser surface alloying technology, plasma surface alloying technology, electron beam alloying technology, mechanical surface grinding technology (SMAT), etc., but most of them are cumbers

Method used

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  • Application of ultrasonic shot-peening to metal surface alloying
  • Application of ultrasonic shot-peening to metal surface alloying
  • Application of ultrasonic shot-peening to metal surface alloying

Examples

Experimental program
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Embodiment 1

[0020] The surface alloying method of adding nickel powder on the surface of pure iron-based substrates after ultrasonic shot peening is carried out according to the following steps:

[0021] (1) The experimental materials are industrial pure iron and Ni60 powder, in which the iron content of the pure iron-based substrate is Fe≥90%, and the particle size of the nickel powder is 300-400 mesh. The size of the pure iron-based substrate is 200×200×4mm, and the pure iron-based substrate is repeatedly polished with 400-grit sandpaper to obtain a fresh metal surface. Clean the surface of the pure iron-based substrate with alcohol to make it clean, and let it dry naturally.

[0022] (2) Sprinkle the nickel powder evenly on the surface of the pure iron-based substrate, and the thickness of the nickel powder is 1-2mm. Shot peening is performed using ultrasonic shot peening equipment. Selected shot peening operating parameters: the shot peening power is characterized by the current val...

Embodiment 2

[0026] Embodiment 2 uses low-carbon steel and tungsten carbide powder, the particle size is 200 mesh, other steps and parameters are consistent with embodiment 1, through the alloying of tungsten carbide on the surface of low-carbon steel, the wear resistance of its surface has been improved. Effective improvement. The friction and wear experiment was carried out using the model MMW-1 configuration control universal friction and wear testing machine. Under the load of 15N, the friction coefficient of tungsten carbide powder was increased by nearly 10 times compared with the untreated material after ultrasonic shot peening. ; When the load is 35N, the friction coefficient of the added tungsten carbide powder after ultrasonic shot peening is nearly 2.6 times higher than that of the untreated material. The present invention has been described as an example above, and it should be noted that, without departing from the core of the present invention, any simple deformation, modifica...

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Abstract

The invention discloses an application of ultrasonic shot-peening to metal surface alloying. The application is characterized in that alloying powder is added in an ultrasonic impact process, diffusion behaviors, in metal, of the alloying powder are strengthened after ultrasonic shot-peening treatment is carried out, and a rapid alloying process under a non-equilibrium state is generated, so that an alloy layer is formed on the metal surface, wherein an intermetallic compound and a solid solution phase are generated; and then, thermal treatment is carried out on the alloy layer to quicken the surface alloying process of the alloy layer, so that a compact alloy layer structure is obtained. Under the action of ultrasonic shot-peening, the alloying powder prearranged on the metal surface quickens diffusion, in the metal, of the alloying powder, and an alloying process, so that the strength, the hardness, the corrosion resistance and the wear resistance of the metal surface are effectively improved.

Description

[0001] The application of the present invention is a divisional application of the parent application "a metal surface alloying method based on ultrasonic shot peening and its application". The application number of the parent application is 2012101015359, and the filing date of the parent application is April 9, 2012 day. technical field [0002] The present invention relates to a metal surface alloying method, more specifically, relates to a metal surface alloying method based on ultrasonic shot peening, so as to improve its surface strength, hardness, corrosion resistance and wear resistance. Background technique [0003] The surface of metal materials is a frequent site of failure. For a long time, people have manufactured new composite materials with surface functions through various material surface treatment technologies in order to improve their wear resistance and corrosion resistance and reduce production costs. Surface alloying technology is a material protection ...

Claims

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Application Information

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IPC IPC(8): C23C24/04
CPCC23C24/045
Inventor 王颖王东坡张涛邓彩艳程方杰
Owner TIANJIN UNIV
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