An Investigation into the Effects of Different Oxy-Nitrocarburizing Conditions on Hardness Profiles and Corrosion Behavior of 16MnCr5 Steels : Table 2

Table 2: DOE referred to the nitro-carburizing cycle indicated as (a) in Figure 2.

	Nitriding (stage 4)			Nitro-carburizing (stage 5)
Treatment code	Time [min]	Temperature[°C]	Type of gas	Time [min]	Temperature[°C]	Type of gas	Total time [min]
Base	180	510	NH₃	240	550	NH₃, CO₂, N₂	505
A1	180	510	NH₃	240	580	NH₃, CO₂, N₂	505
A2	180	510	NH₃	180	580	NH₃, CO₂, N₂	445
A3	180	510	NH₃, N₂O	180	580	NH₃, CO₂, N₂	425
A4	120	510	NH₃, N₂O	180	580	NH₃, CO₂, N₂	360
A5	120	510	NH₃	180	580	NH₃, CO₂, N₂	380