Technological heredity – A decisive factor for tribological features of regenerated gears

The reparatory hardfacing of damaged contact surfaces is the most reliable method of renewing the tooth shape, dimensions and operating characteristics of failed gears. Proper selection of method suitable for reparatory hardfacing implies knowledge about the mechanisms of contact surfaces wear. The regeneration itself is a complex process made up of a greater number of technological operations, with a very important and strictly determined arrangement. The comparative tribological characteristics of the gears regenerated by hardfacing and newly made ones are considered at the occurrence of initial pits on the teeth surfaces i.e. at the occurrence of primary pitting on the gear tooth flanks. The speed of destructive pitting development in regenerated and newly made gears is also compared in this paper.