The calculation method of tooth surface temperature is studied

based on the model of thermal shock and Hertz contact theory

the calculation formula of instantaneous contact temperature on tooth surface is derived

the calculation problem of gear body temperature and the flash temperature are discussed

the influence of gear shift coefficient and modification parameters on transient contact temperature of gear tooth is analyzed

the change rule of the flash temperature along the meshing line is revealed

the research results show that the proper choice of gear shift coefficient and modification parameters can significantly improve the resistance scuffing performance of gear transmission system

avoid scuffing failure.