Increase of wear resistance of the critical parts of hydraulic hammer by means of ion-plasma treatment

The parts of a hydraulic hammer are subjected to wearing during the exploitation. This leads to the decrease of their service life. Many methods of surface strengthening are used in accordance with the literature and the practice, but they do not produce any significant effect. Therefore, it is currently important to develop the new methods of surface strengthening. Ion-plasma chromizing is one of such methods. To determine the influence of ion-plasma chromizing on the wear resistance and the mechanical properties of the hydraulic hammer on the basis of experimental researches and to analyze the structural changes in the material. Ion-plasma chromizing of the parts promotes the increase of their wear resistance in 1.75 times as compared to those which are not strengthened. The technology of ion-plasma chromizing secures the running of the strengthened parts without breaking off and chipping. The zones of structural changes are marked on the sections of parts damages, which are typical for the effects of the second hardening.