Grain refinement of steel plate by continuous equal-channel angular process

Abstract

Equal-channel angular rolling was attempted to refine grain size of a low carbon steel cooling from a lower 7 region. Distinct refinement of ferrite gains as well as disappearance of ferrite-pearlite bands occurred by shear deformation. Nano-size particles of cementite were observed in ferrite grains as well as on grain boundaries, and strength increased appreciably. (C) 2004 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.