What is the function of atmosphere in gas nitriding?

In gas nitriding, it is particularly important to adjust the atmosphere in order to obtain a uniform nitriding layer and prevent the formation of an excessively thick brittle compound layer. Because CO2 and NH3 in the atmosphere will precipitate ammonium carbonate+water in the sampling tube for analysis, which will cause blockage, at present, the more advanced measurement method is the total factor monitoring system of nitriding atmosphere in Hua Min, Wuhan, which adopts all-laser technology to directly measure nitriding atmosphere online, and is not afraid of environmental interference.