Factors Affecting Surface Roughness
of Low Carbon Resulfurized Free Cutting Steel
No.23 March 2018 - Special Issue on “Steel Sheet for Can-making”, “Steel Bar and Wire Rod” and “Slag Products”
Factors Affecting Surface Roughness of Low Carbon Resulfurized Free Cutting Steel
IMANAMI YutaTOMITA KunikazuNISHIMURA Kimihiro
Abstract
Factors affecting surface roughness after cutting low carbon resulfurized free cutting steel have been reported in many papers in the past. However, most of studies were carried out using high speed steel tools instead of cemented carbide or ceramics tools which are becoming more popular recently. In this study, effect of tool materials and steel factors such as sulfides and yield ratio on surface roughness after cutting was studied. As a result, difference of thermal conductivity among tool materials changes cutting temperature. Change in cutting temperature affects surface roughness through formation behavior of built-up edge. On the other hand, from the viewpoint of steel factors, enlarging sulfides, decreasing aspect ratio of sulfides and increasing yield ratio are effective in order to reduce surface roughness with both cemented carbide tools and ceramic tools.
