Using the radial shear rolling method for deep development of the cast structure of ingots of special materials.

The behavior of the steel structure of cast ingot during rolling at the radial rolling mill RSP-10/30 was studied. The ingots for rolling were produced by vacuum induction melting from stainless steel 12H13. The ingots were rolled from a single heating in several passes from a diameter of 32 to 26 mm at 1200 °C and from 25 to 13 mm at 800 °C. This enabled, per one operation, to substantially change the sample structure from a coarse-grained cast dendritic structure of 0.5–1.5 mm to an equiaxed fine-grained structure with grain size 1–4 μm in the peripheral part and elongated grains of larger size in the axial part of the rolled billet. [ABSTRACT FROM AUTHOR]