A binary compound of boron and nitrogen, of empirical formula BN; exists in forms analagous to the allotropes of carbon, many of which are inorganic polymers
The process of adding nitrogen to the surface of a steel usually from dissociated ammonia as the source Nitriding develops a very hard case after a long time at comparatively low temperature, without quenching
A case hardening process that depends on the absorption of nitrogen into the steel All machining, stress relieving, as well as hardening and tempering are normally carried out before nitriding The parts are heated in a special container through which ammonia gas is allowed to pass The ammonia splits into hydrogen and nitrogen and the nitrogen reacts with the steel penetrating the surface to form nitrides Nitriding steels offer many advantages: a much higher surface hardness is obtainable when compared with case-hardening steels; they are extremely resistant to abrasion and have a high fatigue strength
The process of adding nitrogen to the surface of a steel, usually from dissociated ammonia as the source Nitriding develops a very hard case after a long time at comparatively low temperature, without quenching
Introducing nitrogen into the surface layer of a solid ferrous alloy by holding at a suitable temperature (below Ac1 for ferritic steels) in contact with a nitrogenous material, usually ammonia or molten cyanide of appropriate composition Quenching is not required to produce a hard case
The introduction of nitrogen into the surface of tool steels by holding at a suitable temperature in contact with a nitrogenous material, usually ammonia, to produce a hard wear resistant case