Do you know the characteristics of laser surface treatment?

Laser heat treatment uses high-power density laser beams to perform surface treatment on metals. It can achieve phase change hardening (also called surface quenching, surface amorphization, surface remelting and quenching), surface alloying and other surface modification treatments for metals. , Resulting in changes in the surface composition, structure and performance that cannot be achieved with its large surface quenching. Compared with other traditional heat treatment processes such as induction hardening, carburizing and nitriding, laser heat treatment technology has the following characteristics:

1. There is no need to use additional materials, only the structure of the surface of the material to be processed is changed. The modified layer after the treatment has sufficient thickness, and the depth can be adjusted as needed, generally up to 0.1-0.8mm.

2. The treatment layer and the substrate have high bonding strength. The laser surface treatment of the modified layer and the substrate material is a dense metallurgical bond, and the surface of the treatment layer is a dense metallurgical structure with high hardness and wear resistance.

3. The deformation of the processed part is extremely small. Due to the high laser power density, the interaction time with the part is very short (10-2-10 seconds), so the thermal deformation zone and the overall change of the part are very small. Therefore, it is suitable for high-precision parts processing as the final processing procedure of materials and parts.

4. Good processing flexibility and wide application range. Using a flexible light guide system, the laser can be directed to the processing part at will, so that deep holes, inner holes, blind holes and grooves can be conveniently processed, and selective local processing can be performed.

At present, the most widely used machine industries such as automobiles, metallurgy, petroleum, heavy machinery, agricultural machinery, etc., as well as high-tech products such as aerospace and aviation. Laser heat treatment is widely used in the automotive industry. Laser heat treatment can be applied to many key automotive parts, such as cylinder blocks, cylinder liners, crankshafts, camshafts, Piqifa, valve seats, rocker arms, and aluminum piston ring grooves.

After laser treatment, the surface hardness of cast iron can reach above HRC60 degrees, and for medium-carbon and high-carbon carbon steels, the surface hardness can reach above HRC70 degrees, thereby improving wear resistance, fatigue resistance, corrosion resistance, and oxidation resistance. Its service life.