Increasing the wear resistance of gears during laser hardening

\nThe paper presents the main results of metallographic studies and tribotechnical tests of steel for the production of 25CrMnTi gears. Quenching of the samples was performed using a defocused and oscillating beam normal to the processing speed vector. Friction and wear tests were performed on a friction machine according to the scheme: “a flat sample with laser hardening-the end of the sleeve of a counter-tile made of 40X steel”, when industrial oil I20 was dripped onto the surface of a sample hardened by a laser beam. It was found that the microhardness of the samples tempered with an oscillating beam was 620-680 HV, which is 60-90 HV higher than when quenched with a defocused beam and 3 times higher than the hardness of the base material. The cross-sectional area of the laser quenching paths with an oscillating beam was 1.65-1.92 times higher. than when processing with an unfocused beam. The sliding speed of samples hardened by an oscillating and defocused beam to jamming is 2 and 2.5 times and the wear resistance is 4.16 and 3.4 times higher, respectively, than 25CrMnTi steel.\n