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A metal surface alloying method based on ultrasonic shot peening and its application

An ultrasonic shot peening and metal surface technology, applied in the direction of pressure inorganic powder coating, etc., can solve the problems of complex process, cumbersome operation, narrow application area, etc., and achieve good metallographic structure compactness, eliminate internal stress, and strong adaptability Effect

Active Publication Date: 2016-06-15
天津益普科技发展有限公司
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  • 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 cumbersome to operate, complex in process, narrow in scope of application, and high in energy consumption. Therefore, it is of great practical significance to propose a simple and easy surface alloying method

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  • A metal surface alloying method based on ultrasonic shot peening and its application
  • A metal surface alloying method based on ultrasonic shot peening and its application
  • A metal surface alloying method based on ultrasonic shot peening and its application

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Embodiment 1

[0019] 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:

[0020] (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.

[0021] (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

[0025] 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.

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Abstract

The invention discloses a metal surface alloying method based on ultrasonic shot-peening and an application thereof. The method is characterized in that alloyed powder is added in the process of ultrasonic peening, after carrying out ultrasonic peening on the powder, the diffusion of the powder in metal is enhanced, and rapid alloying in nonequilibrium state happens, thus an alloy layer is formed on the metal surface, wherein intermetallic compounds and solid solution phases are generated, then heat treatment is conducted to accelerate the process of surface alloying, thus a compact alloy layer structure is obtained. According to the invention, under the effect of ultrasonic peening, the diffusion and alloying process of the preset alloy powder on the metal surface are accelerated, and the strength, hardness, corrosion resistance and wear resistance of the metal surface are effectively raised.

Description

technical field [0001] 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 [0002] 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 technology that changes the composition and organization of the surface layer of the base metal by diffusion. The main application in machinery manufacturing is to make nickel powder, chromium carbide, silicon carbide, zinc powder, carbon powder, tungsten carbide, zirconium dioxide, aluminum powder and other alloy powders on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04
Inventor 王颖王东坡张涛邓彩艳程方杰
Owner 天津益普科技发展有限公司
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