SHORT-DURATION GAS NITRIDING OF PARTS OF VAZ PASSENGER CARS

Gas nitriding in partially dissociated ammonia is widely used in machi ne building. Surface layers obtained by this method consist of continu ous nitrides and are characterized by high brittleness and susceptibil ity to scoring and spalling in operation. The processes of short-durat ion gas nitriding in a mixture of ammonia and exogenic gas used by the VAZ plant provide surface layers that are more plastic than nitride, carbonitride, and oxynitride layers. The chemical reactions occurring in this process are analyzed and the equilibrium composition of the ex ogenic gas is calculated.