Abstract:
PlaIn carbon at"els of diff",rent C/1lCOOncontent" have been 100-
nitrided in the temperature rQngc of 475-sasoc in a 75 HZ: 25 N2
gas mixt~re to ~tudy the eft~ct of carbon on the nature of the
layo,'." formaci. during lon-nitriding. l'he effects have been studied
by 01',:10a1 meta llography and lIIi<:rohardnes5 Illeaslu:ement techniques.
Opb<;al lIletalloyral-'hic studir..'s on triHlbVUn;c s""tiOllS of the
i()n-nit~ lded samples have shol.m that the thickness of compound
laye!" :l-ncreases with increasing c<lrbou content J.n the bteels.
Microhardneas rn~asurements on the surface of the nltrided samples
wer", p,,-rformed <lud also the hardn",sll versus penetration distane,"
prnLites of tnt! ion-nitrided samples were determilled. l,'rom the
hardllus<,-penetratiun d_istancu profile!; it has been observed thelt
the case-depth l i.e. the dq,th of nitrogen penetration into th"
specimens) decr<:Hises with incre ••sing carbon content in tho stoci.
