Refractory Hard Alloys Elaborated by Casting of Ternary (Co, Ni Fe)-30Cr-2.5 to 5 wt% C Compositions


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.

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Berthod, P. , Hestin, O. , Souaillat, E. , Ba, M. , Dia, A. , Aranda, L. , Schweitzer, T. , Mouton, L. , Kohler, A. , Villeger, P. and Conrath, E. (2015) Refractory Hard Alloys Elaborated by Casting of Ternary (Co, Ni Fe)-30Cr-2.5 to 5 wt% C Compositions. Journal of Materials Science and Chemical Engineering, 3, 127-135. doi: 10.4236/msce.2015.37017.

Conflicts of Interest

The authors declare no conflicts of interest.


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