Comprehensive Estimation of Changes in the Microgeometry of Steel 45 by Ultrasonic Plastic Deformation with a Free Deforming Element

A method of ultrasonic surface plastic deformation is widely used to change the properties layers metal products. Under influence this type treatment, structure material changes, microhardness increases, roughness decreases, internal tensile stresses are removed, and compressive created. Now many types have been developed, which differ in degree impact on material. The object paper study microgeometry steel 45 (ASTM M1044; DIN C45; GB 45) under action by a free deforming element (indenter form rolling ball). During study, factors that greatest sample during treatment were identified. These include initial sample, number passes indenter, feed force with indenter pressed treated surface, amplitude oscillations horn. presents dependences changes main parameters above factors. value at it possible obtain uniform microrelief determined. optimization providing height step was carried out. Recommendations for choosing most effective technological modes ball given.