Strengthening Thermal Treatment of Economy-Alloyed Steel After Carburization

Abstract

The paper addresses the issues of improving the performance characteristics of aviation gear wheels made of low carbon economy-alloyed steel C0,15Cr2MnNi2TiB. Provides information about the modes of final heat treatment, used after vacuum cementation. A heat treatment process was developed to ensure the presence of carbides on the tooth profiles, the absence of a carbide mesh in the carburized layer, the minimum amount of residual austenite, and the optimum mechanical properties of gears: surface hardness of 60 HRC, core hardness of 40 HRC. The optimum temperature conditions for high tempering after carburization and low tempering after quenching are determined.