Ottimizzazione del trattamento termico di una ghisa multilegata con grafite libera. Study about thermal treatments on a multi-alloyed iron with free graphite. Etude du traitment thermique d'une fonte multi alliée avec graphite libre

The research about the High Speed Steel for Hot Strip Mill is moving to the opportunity of safe money decreasing the roll change with anti-sticking and lubricant properties. The aim is to combine the hard martensite matrix, hard carbides coming from particular carbide-forming elements as vanadium and niobium, and spheroidal graphite nodules in the shell of a duplex material roll. In this work two compositions are investigated to evaluate the carbides presence and verify the graphite behaviour