Ferrous tool materials have iron as a base metal and include tool steel, alloy steel, carbon steel, and cast iron.

In this article we discussed the possibility of replacement of cobalt alloy by Cr-Ni iron Base alloy in drill bit bearing on the basis of welding test, wearing test and microscopic examination.

In this paper, the effects of rare earth (re) and chromium on the high temperature oxidation resistance of iron base fluxing alloy spray welding coatings is reported.