TITLE:
Refractory Hard Alloys Elaborated by Casting of Ternary (Co, Ni Fe)-30Cr-2.5 to 5 wt% C Compositions
AUTHORS:
Patrice Berthod, Ophélie Hestin, Elise Souaillat, Moussa Ba, Ahmed Dia, Lionel Aranda, Thierry Schweitzer, Ludovic Mouton, Alain Kohler, Pascal Villeger, Elodie Conrath
KEYWORDS:
Cast Co-Based Alloy, Cast Ni-Based Alloy, Cast Fe-Based Alloy, Chromium Carbides, High Hardness, Graphite
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.7,
July
1,
2015
ABSTRACT:
Three series of ternary alloys of the
{M-30Cr-xC}-type with M = Co, Ni or Fe and x ranging from 2.5 to 5 wt% were
elaborated by casting. Their microstructure characterizations by XRD and SEM
show that very high volume fractions in chromium carbides (even more than 50%)
may be obtained in a metallic matrix by this way. However graphite may also
appear in very low quantities in the carbon-richest alloys. The hardness
increases with the carbon content (up to 1000 Hv30kg) but it may be a little
lowered when graphite is also present. The results show that very hard alloys
may be simply obtained by casting of rather cheap elements.