Improving deformability of stainless and heat resisting two-phase steels in cold or hot rolling

The effect is studied of the polymorphous α→γ - transformation occurring in the deformation zone under the action of deformation itself, in martensitic-ferritic steels, on the position of the critical brittleness temperature (Tsub(c)). As this transformation develops, the level of Tsub(c) in these steels shifts to the lower-temperature region. The formation of the optimal phase composition in the process of hot plastic deformation itself may be one of the possible ways for enhancing the deformability of two-phase martensitic ferritic steels during the subsequent cold rolling, as well as of austenitic-ferritic steels during hot deformation. Optimal conditions for the proposed technology of high-temperature mechanical treatment as applied to two-phase corrosion and heat-resistant steels have been developed