Metallurgical Aspects of Layered Cracks in Hot-Rolled Plates

Abstract

The nature of separations arising in hot-rolled plates from high-toughness steels of the new generation like 05G2B and of cleavages arising in traditional building steels of type 09G2S is studied. Like and unlike features of separations and cleavages are determined. The concept of “critical stress \( {\upsigma}_{\mathrm{b}}^{\mathrm{cr}} \)” describing the strength of the interlayer boundaries responsible for formation of layered cracks is used to analyze various factors responsible for the susceptibility of rolled plates to layered fracture.