Effect on durability ion nitriding open gears.

Abstract

Кaplun P.V., Gonchar V.A. Effect on durability ion nitriding open gears. The results of researches of durability open gears using advanced technologies of surface hardening by ion nitriding in hydrogen-saturating media and subsequent heat treatment with the creation of the material in the surface layer of optimum residual compressive stresses. An analysis of the operating conditions and the stress-strain state of open gear teeth showed that different portions of the surface of teeth takes different in magnitude and type of stress. The most dangerous areas of the surface have a leg and depression between the teeth. Therefore, it is obvious that these surface portions require different properties of the surface layer and the residual compressive stress to provide maximum wear and durability of the gears. To achieve this goal can be achieved by hardening the surface of the teeth and especially in hazardous areas by applying strengthening coatings with a gradient structure in depth, creating in the surface layers of the residual compressive stresses to the optimum value and hardening the core of the tooth. To do this, use a heat treatment of the tooth material with increased hardness of its core strengthening coatings applied using ion nitriding in hydrogen-free environment for optimum technological modes based on operating conditions.