Principles of Creating New Economically Alloyed Ferritic Steels with a Unique Set of Properties

Resumo

On the basis of research results it is shown that provision of good strength indices, ductility, forgeability, and operating reliability that are difficult to combine may be provided simultaneously in hot-worked steels by obtaining a uniform finely dispersed ferritic structure and a volumetric system of nano-sized mainly interphase carbide precipitates. These steels have an extremely economical alloying system and simple manufacturing technology providing the possibility of obtaining hot-rolled sheet with thickness up to 1.8 mm and hot-dip zinc coating application. Initially in ferritic steels microalloying with Ti and Mo is used, although the possibility of using a complexly alloyed system of V, Nb, Ti, and Mo is demonstrated.