Effect of Temper Rolling Reduction Ratio on Microhardness and Microstructure of DC04 Grade Sheet Material

With temper rolling, which is the final stage of cold rolling manufacturing process, to surface sheet metal materials transferred roughness with specially roughened rolls. In this study, microhardness and microstructural evolution occurring in section along thickness DC04 grade rolled various reduction ratios were investigated. As a result, it was concluded that distribution taken from increases increase ratio center decreases. process 250 µm 500 an approximately 5% 15% has occurred, respectively compared before process. It also ratio, grains elongated thinned on change regions close less.