A laser high temperature shock-nitriding compound processing device and method

A compound processing and nitriding technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of low processing efficiency, poor uniformity, and complicated operation, so as to reduce the intermediate process time and facilitate operation , the effect of simple structure

Active Publication Date: 2021-02-12
JIANGSU UNIV
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Problems solved by technology

However, nitriding technology has disadvantages such as low processing efficiency, complicated operation, high surface roughness, poor uniformity, and thin nitrided layer. In addition, there are problems such as the inability to obtain a high-hardness layer and high-temperature stress release on the surface of the material by simply using laser high-temperature shock.

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  • A laser high temperature shock-nitriding compound processing device and method
  • A laser high temperature shock-nitriding compound processing device and method

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0018] like figure 1 As shown, a laser high-temperature shock-nitriding composite processing device for improving the fatigue resistance of materials in the present invention includes a laser high-temperature shock system, a nitriding processing system, and a control computer 14 . The laser high temperature impact system includes: air pump 1, pressure gauge 2, pressure accumulator 3, laser 5, reflector 9, gas transmission channel 11, high pressure resistant lens 12, black paint conduit 13, laser head 25, black paint storage tank 27, black paint storage tank electromagnetic valve 32; the inside of the laser head 25 is provided with three passages, the central passage is for the laser beam to pass through, the gas transmission passage 11 on the side of the central passage is used for high-pressure gas to pass through, and the pressure...

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Abstract

The invention relates to a laser high-temperature shock-nitriding composite processing device and method, including a laser high-temperature shock system, a nitriding processing system, and a control computer. First, carry out the first high-temperature and high-pressure nitriding treatment on the material through the nitriding processing system to form a certain depth of nitriding layer on the surface of the sample, then decompress the nitriding furnace, and adjust the nitriding furnace according to the temperature requirements of the dynamic time-effect strain of the material The internal temperature is kept warm, and the laser high-temperature shock system is started to perform the first impact strengthening on the surface of the material, generating high-density dislocations, dislocation entanglements and sub-grain boundaries on the surface of the material, and inducing high-temperature phase transitions between nitrogen atoms and metal atoms reaction. Furthermore, a second nitriding and a second laser shock strengthening can also be carried out. The invention can greatly improve the high-temperature oxidation resistance, wear resistance, corrosion resistance and high-temperature fatigue performance of the material, and has simple device, easy operation and high processing efficiency.

Description

technical field [0001] The invention relates to a surface processing technology for improving the anti-fatigue performance of materials, in particular to a laser high-temperature shock-nitriding composite processing device and method for improving the anti-fatigue performance of materials. Background technique [0002] Alloy materials such as stainless steel, alloy steel, and titanium alloy are the most widely used materials in industrial production, but these materials have disadvantages such as low hardness, poor wear resistance and fatigue resistance, and require parts to have good mechanical properties. Strengthening treatment is very necessary. Nitriding treatment is widely used due to the advantages of low treatment temperature, small deformation of parts after treatment, high surface hardness, and good fatigue resistance; At the same time, it is accompanied by dynamic strain aging and dynamic precipitation of reinforcing phases, and can induce high-amplitude residual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/24C23C8/80C21D10/00
CPCC21D10/005C23C8/24C23C8/80
Inventor 任旭东童照鹏焦加飞周王凡陈兰陈炳泉
Owner JIANGSU UNIV
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