Influence of machining process on residual stresses in the surface of cemented carbides

The worldwide supply with manifold industrial goods requires superior manufacturing techniques. In the field of steel products cold forging has gained importance for the last sixty years. One of the main challenges in cold forging is tool manufacturing. As a result of the ongoing trend in using work piece materials with high yield stresses cemented carbides are increasingly used as tool materials. The manufacturing process of the tool requires a combination of hard and fine machining. The result is a specific combination of coarse and fine structure which is determined by the processing parameters of different machining steps. Analyses of residual stresses in the top layer reveal this superposition. The scope of the present study is the investigation and description of correlation between manufacturing process and surface properties in a quantitative way.