Residual Stress Measurement in the Hard Turned SKD Tool Steel

Most manufacturing processes such as welding, cutting and molding generate residual stresses on the surface of manufactured parts. Tensile residual stress is harmful to the surface integrity, which results in reduced fatigue life and causes other structural failures when the service stresses are superimposed on the residual stresses. In the research, the residual stresses of the high hardness steel (over HHole-drilling Method. Residual stress in the surface of hard turned workpiece was mainly appeared to be compressive stress.