Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel

The effects of strain on the microstructure and mechanical properties 0.81C-0.22Si-0.31Mn (wt%) high-carbon steel were investigated by thermal simulation, scanning electron microscopy, high-resolution transmission microscopy (HRTEM), an backscatter diffractometer (EBSD). It was found that when deformed at 670 °C (a temperature between A1 Ar1), a deformation-induced pearlite transformation cementite spheroidization occurred. volume fraction ratio increased with increase from 20% to 75%. mainly consisted deformation exceeded 40%. aspect its maximum (5.3) 40% decreased 1.4 75% strain. In addition, strength elongation rapidly in 60% due cementite. However, as further 75%, slightly refinement ferrite matrix. comprehensive performance can be improved applying Ar1.