Continuous Cooling Transformations in Martensitic Stainless Steels.

To gain further insight into the nonequilibrium transformations produced by non-isothermal cycles in martensitic stainless steels, the study experimentally determined the CCT diagrams of four Crl 3 and CrMoV1 4 type steels, which were cooled from two different austenizing temperatures. The resu]ts show that the changes in the chemical composition of the austenite, which are caused by the carbide dissolution and precipitation processes, have a considerable effect on the phasetransformations that occur during continuous cooling.