Determining the Diffusion Coefficient in Practice of Nitrogen and Carbon for Nitro-Carburizing High Alloy Steel

Through concomitant diffusion of carbon and nitrogen it is aimed the obtaining of superior characteristics of layer and the increasing of efficiency of diffusion process, compared with the simple nitriding.The phenomena of wear, fatigue and corrosion are the main factors that lead to out of use of a tool.All these unwanted phenomena have a common feature: they preponderant occur or in exclusiveness in the superficial layer of the tool.From these considerations appears special significance that is giving researching the physical -chemical processes which occur in superficial layers, as well technologies of obtaining of these layers.Hardness, wear, and fatigue problems are resolved by using in majority of cases of some thermo-chemical and heat treatments, which allow the obtaining of the necessary proprieties of exploitation due to transformations that occur in steel at heating-cooling it.