IMPACT TOUGHNESS OF SPECIMENS CUT OUT FROM THE ROLLERS OF MACHINES FOR CONTINUOUS CASTING OF BLANKS WITH FUSED LAYERS

摘要

We study the impact toughness of three batches of Charpy specimens cut out from the rollers of continuous-casting machines. We determine the stages of dynamic deformation and fracture of bimetallic and monometallic specimens on the micro-, meso-, and macrolevels. With the help of scanning and transmission microscopies, we study the specific features of the micromechanisms of plastic deformation and fracture for steels with ferrite-pearlite (35G2) and ferrite-martensite (18Khl 1MNFB) structures. In addition, we analyze their impact toughness with regard for these features.