Compared with traditional theramal treatment technology, the Laser hardening process has more advantages.

What is Laser hardening process?

Compared with traditional theramal treatment technology, the Laser hardening process has more advantages-from an economic perspective, it improves product of efficiency, productivity and quality. In many applications, a small amount of local heat treatment can reduce deformation, and rapid cooling produce good microstructure.

Laser surface treatment can be divided into several steps, which involve converting solid and melting processes. The former include martensitic hardening, tempering and irresolute of red, while the latter includes re-melting, alloying, cladding and dispersion hardening.

The common method we use is the martensite transformation hardening, it is applied to carbon steel and cast iron products.

Applications can be quickly raised the surface temperature of the laser beam (up to 1000K / sec), so as to form a thin coating, i.e. then converted into austenite. After the laser beam finishes the movement, its heat gets relatively cooling, then achieving self-quenching purposes. This process will result in rapid cooling of the surface coating, and the austenite into martensite. It is therefore important that the steel must be under (quenching and tempering) suitable conditions, and the process conditions are carefully selected.

The main advantages of laser hardening is to improve the wear resistance. Accordingly, it is possible to reduce a large degree of roughness. Laser quenched surface has a higher strength than the milling media, and adhesive wear ratio also reduced coefficient of friction. In addition, laser hardening can be increased compressive stress bearing capacity, it will be raised to higher than the original Hertz stress level, and improved the fatigue properties of the surface.

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