Laser heat treatment is a method of surface treating the metal with a high power density laser beam.
It can perform laser heat treatment on metals.
Surface modification such as phase hardening (referred to as surface quenching, surface amorphization, surface remelting), surface alloying, etc., resulting in changes in surface composition, structure, and properties that cannot be achieved by large surface quenching.
After laser treatment, the surface hardness of cast iron can reach more than 60 degrees HRC.
For medium carbon and high carbon carbon steel, the surface hardness can reach more than 70 degrees HRC, thus improving the wear resistance, fatigue resistance, corrosion resistance, oxidation resistance and other properties, extending its service life.
Compared with other heat treatments such as induction hardening, carburizing, and nitriding, the laser heat treatment technology has the following characteristics:
- No need to use additional materials, only change the structure of the surface of the material being treated.
The treated layer after treatment has a sufficient thickness.
Can be adjusted according to the needs of the depth. Generally it can reach 0.1-0.8mm.
- The bonding strength between the treatment layer and the substrate is high.
The laser surface treatment between the modified layer and the matrix material is a dense metallurgical bond, and the surface of the treated layer is a dense metallurgical structure with high hardness and wear resistance.
- The deformation of the treated part is extremely small. Due to the high laser power density, the action time with the part is very short (10-2-10 seconds).
Therefore, the thermal deformation zone and overall variation of the part are small.
Suitable for high-precision parts processing as the final processing of materials and parts.
- The processing flexibility is good and the application is wide.
The flexible light guiding system allows the laser to be directed to the processing section, making it easy to handle deep holes, bores, blind holes and grooves.
Selective local processing is possible.