Technology of surface hardening of working surfaces of machine parts and equipment using laser radiation

Application: technologies provide hardening of automotive engineering parts, oil and petrochemi­cal equipment, machine parts due to the development of surface layers with specific properties.

Advantages: the development of surface layers with desired properties through the use of a laser hardening, laser alloying or laser cladding. Laser hardening is effective for carbon, alloyed tool steels, cast iron and hard alloys. With all the advantages of laser hardening, laser alloying allows, furthermore, to pro­duce hardening of the material not subjected to quenching, for example, mild steels, austenitic steels and nonferrous alloys. Laser cladding of protective coatings is used to restore worn-out parts.

Key features: laser hardening allows obtaining hardness in the hardened layer up to 1000–1200 HV. Wear resistance is increased 2–3 times as compared with volumetric-hardened steels. The depth of hard­ened layer is 0.3–1.0 mm.

In laser alloying the hardened layer depth is 0.3–0.5 mm. Increase of wear resistance is ensured in 3–5 times higher compared with volumetric-hardened.

Developed: Research Laboratory «Plasma and Laser Technologies», Prof. Dr. Devoino O.G. D.Sc. (Doc­tor of Techn. Sci.).

Tel.: +375 17 331 00 45, fax: +375 17 331 00 45, e-mail: scvdmed@bntu.by.