Method for carrying out anatonosis by adopting laser plasma impact wave in chemical heat treatment process

A laser plasma and chemical heat treatment technology, which is applied in the field of surface engineering technology and laser processing, can solve the problems of high energy consumption, long diffusion time, and high diffusion temperature, so as to increase diffusion channels, improve diffusion efficiency, and reduce diffusion activation energy. Effect

Inactive Publication Date: 2013-03-20
AIR FORCE UNIV PLA
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Problems solved by technology

Generally speaking, chemical heat treatment uses thermal energy, which requires higher diffusion temperature or longer diffusion time, and consumes more energy.

Method used

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  • Method for carrying out anatonosis by adopting laser plasma impact wave in chemical heat treatment process
  • Method for carrying out anatonosis by adopting laser plasma impact wave in chemical heat treatment process

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Embodiment Construction

[0016] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0017] The laser parameter requirements of the embodiment of the present invention are: the laser wavelength is 1064 / 532nm, the pulse width is on the order of nanoseconds, and the laser power density is 3-8GW / cm 2 , The spot overlap rate is 50-75%, and the size and shape of the spot are selected according to the structural characteristics of the workpiece. The chemical heat treatment process can be aluminizing, carburizing, nitriding or aluminizing chromium, etc.

[0018] The technical solution step that the present invention adopts is:

[0019] (a) Clamp the specimen to the motion system, using a high power density of 3-8GW / cm 2 , ns-level short-pulse laser is irradiated on the absorbing protective layer, the coating absorbs the laser energy, and induces plasma shock waves to act on the surface of the workpiece; the plasma shock waves act on the area to be tre...

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Abstract

The invention relates to a method for carrying out anatonosis by adopting laser plasma impact waves in a chemical heat treatment process. According to the method, induction to generate plasma impact waves are generated by induction with high-power short-pulse laser, act on materials and are combined with chemical heat treatment, thereby improving the surface property of metal materials and members and enhancing the oxidation resistance, abrasion resistance and corrosion resistance of the metal material and the members, wherein the chemical heat treatment can be alumetizing, carburization, nitridation, aluminum-chromium penetration and the like. The method disclosed by the invention has the beneficial effects that the temperature of the chemical heat treatment in order to obtain identical penetration layer depth, the temperature of the chemical heat treatment can be obviously reduced, and the treatment time is shortened, thereby reducing the deformation of workpieces.

Description

technical field [0001] The invention belongs to the field of surface engineering technology and laser processing, and in particular relates to a method for increasing penetration by using laser plasma shock waves in the chemical heat treatment process. Background technique [0002] Chemical heat treatment can be used to improve product quality and prolong the service life of mechanical products. For example, carburizing can be used for transmission parts such as gears; metalizing can significantly improve the anti-oxidation and corrosion resistance of parts, ensure normal work at high temperatures and prolong their use life. Generally speaking, chemical heat treatment uses thermal energy, and the required diffusion temperature is higher or the diffusion time is longer, and the energy consumption is large. Mechanical energy assisted infiltration (ZL01107820.0) technology uses infiltration agent and impact particles to impact the surface of the workpiece in the drum of the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00
Inventor 何卫锋李玉琴李应红周留成何光宇王学德
Owner AIR FORCE UNIV PLA
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