Abstract
TiC is the main component of cermet. It has low specific gravity, and in addition, it has superior hardness and oxidation resistance than WC. However, the TiC particle can not be inserted for gray cast iron in the same way as the WC particle. Thus partial reinforcement of gray cast iron by the TiC particle was attempted in this study. The reinforcement process was examined by planing gray cast iron on TiC powder and heating it, and by buring gray cast iron in TiC powder and heating it. In order to promote reinforcement, nickel powder or carbon steel powder was added. A more or less uniform TiC inserted layer was formed by the addition of over 50 vol % nickel. The matrix near the surface of the inserted layer transformed to a retained austenite by the effects of the nickel.
