Abstract
The residual stresses in the case-hardening steel carburized to various case depths and hardened isothermally at 150° and 220°C are measured, at the same time the specific volume at each part in the specimens is measured. In order also to investigate the effect of specimens size on the normal quenching residual stress, the residual stresses in the 8 mmφ and 15 mmφ specimens which received the same heat treatment as the 11 mmφ specimen in the first report were measured. Thus the mechanism of occurrence of residual stresses and the correlation with tensile test results of these specimens are explained.
