Test research of fatigue life of laser quenching gears shows that fatigue life of laser quenching gears is much higher than that of conventional quenching gears. Laser quenching gears also possess high resistance to wear

teeth break and peeling. Based on the test research

the mechanism of high fatigue life and wear resistance of laser hardening gears are analysed in the paper

and factors that the fatigue life of laser hardening gears is higher than that of conventional quenching treatment gears are also aralysed.