INCREASING WEAR RESISTANCE OF TAIL BY LASER HARDENING

The presented paper is devoted to determining the sizes of laser thermal hardening zones, microhardness, and wear resistance of steel 25 samples reinforced with a defocused and oscillating beam. The results of tribotechnical tests on an upgraded reciprocating friction machine equipped with digital signal processing from strain sensor in LabVIEW are presented. It is found out that when treated with a defocused and oscillating beam, the hardening area of the samples was 25 and 50% of the nominal surface with an equal step of the quenching tracks, which indicates an increase in process productivity twice under equal hardening conditions. The wear resistance of the samples after quenching with a defocused and oscillating beam increased by 2.93 and 2.18 times compared with the initial value.