STUDY OF RESIDUAL-STRESS DISTRIBUTION IN THE MACHINED STAINLESS-STEELCOMPONENTS

The demand for high quality and fully automated production, coupled wi th advances in alloy development, focuses attention on the surface con dition of products, especially the residual stresses on the machined s urface because of its effect on component performance, longevity, and reliability. Although stainless steel is an important material with wi de application, it is not easy to obtain a favorable surface condition due to its sensitivity to thermal and mechanical operations. In order to obtain favorable surface conditions in a stainless steel component , it is necessary to have practical data which include information con cerning tool wear, surface roughness and surface residual stress. In t he research toward developing a machinability chart which can provide suitable cutting parameters for the high production rate and good qual ity surface, and can be used in computer controlled machining tools, s urface residual stress distributions in the turning process for stainl ess steel were studied. Austenitic 304 stainless steel bars were selec ted as the workpieces and uncoated carbide tools were used in the test s. The obtained results will show residual stress conditions on the ma chined stainless steel 'components varying according to cutting condit ions.