Increasing of Contact Fatigue Strength by Nitriding and Shot-Peening Treatment

Author:  Nakonieczny, Monka
Source:  Conf Proc 2011: ICSP-11 South Bend, IN USA (pgs. 453-458)
Doc ID:  2011076
Year of Publication:  2011
Abstract:  
This report describes the method of raising contact fatigue strength, designated for application in the manufacture of gears. Investigations were carried out on 41CrAlMo7 grade steel (closest equivalent: Nitralloy 135M) following quenching and tempering, nitriding and double shot-peening. Special emphasis should be placed on the combination of the nitriding and shot-peening technologies. Both nitriding and shot-peening have been significantly modified and differ from the classical processes. Nitriding was carried out in such a way as to prevent the formation on the surface of a compound layer, composed of nitrides