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Laser high temperature shock-nitridation combined 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, complicated operation, etc., and achieve the reduction of intermediate process time and simple structure , the effect of easy operation

Active Publication Date: 2019-01-15
JIANGSU UNIV
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  • Application Information

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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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  • Laser high temperature shock-nitridation combined processing device and method
  • Laser high temperature shock-nitridation combined 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-nitridation combined processing device and method. The device comprises a laser high temperature shock system, a nitridation processing system and a control computer. The method comprises the following steps that: the laser high temperature shock system performs primary high-temperature high-pressure nitriding treatment on a material to forma nitride layer of a certain depth on the surface of a sample at first; then a nitriding furnace is decompressed, and the internal temperature of the nitriding furnace is adjusted and maintained according to the temperature requirements of dynamic aging strain of the material; and then the laser high temperature shock system is started for primary shock processing of the surface of the material soas to form high-density dislocations, dislocation tangles and subgrain boundaries on the surface of the material, and a high-temperature phase change reaction between nitrogen atoms and metal atoms is induced. Secondary nitriding and secondary laser shock processing may be performed. The device and method of the invention can greatly improve the high-temperature oxidation resistance, wear resistance, corrosion resistance and high-temperature fatigue performance of the material; and the device is simple in structure, easy to operate and high in 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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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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