Abstract
Hot rolling was carried out of high chromium cast irons containing chromium 15 and 30% in which the eutectic ratio was controlled to be 65 to 100% for the purpose of breaking down the eutectic carbides and dispersing them. The high chromium cast iron is plastically workable under some appropriate rolling conditions. The hot rolling workability is improved by elevating the rolling temperature. A critical temperature TC at which the workability abruptly increases is also found. As the rolling reduction is increased and the carbon and chromium contents are increased, TC rises and the workability becomes poor. The eutectic carbides having rod or plate shape are deformed, broken down and dispersed uniformly in the matrix by hot rolling.
