Question: Nitriding is a process in which nitrogen is allowed to diffuse into the surface of steel for the purpose of increasing the surface hardness of

Nitriding is a process in which nitrogen is allowed to diffuse

Nitriding is a process in which nitrogen is allowed to diffuse into the surface of steel for the purpose of increasing the surface hardness of a component. It has been determined that a satisfactory nitrogen case depth is produced in BCC iron after 1 hour at 730C. How much time in hours) is required to produce a satisfactory case depth if nitriding is carried out at 640C? For the diffusion of nitrogen into BCC iron Q= 76.6 kJ/ mol and Do = 0.0047 cm/s

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