Gaseous carburising of self-passivating Fe–Cr–Ni alloys in acetylene–hydrogen mixtures
2011; Maney Publishing; Volume: 27; Issue: 8 Linguagem: Inglês
10.1179/1743294411y.0000000006
ISSN1743-2944
AutoresThomas L. Christiansen, Thomas Strabo Hummelshøj, Marcel A.J. Somers,
Tópico(s)Intermetallics and Advanced Alloy Properties
ResumoGaseous carburising of self-passivating Fe–Cr–Ni alloys in acetylene–hydrogen was investigated for temperatures up to 823 K. Acetylene–hydrogen gas mixtures allow both the activation of the surface and the subsequent carburising at a high and adjustable carburising potential. For relatively low temperatures, carbon stabilised expanded austenite develops, which has high hardness, while retaining the corrosion performance of the untreated alloy; for relatively high temperatures, Cr based carbides develop, and eventually, the material deteriorates by metal dusting corrosion.
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