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

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...

AI Technical Summary

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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