Development of Quality Criteria for the Surface Layer of Cylinders with Wear-Resistant Coatings

Abstract

Criteria for technological support of the quality of finishing the surface layer of cylinders with wear-resistant coatings using composite materials have been developed. In the process of finishing surfaces from wear-resistant materials there are defects on the production surfaces, which reduce the performance properties of products. After analyzing the causes of chips and cracks on the production surfaces, it has been identified that the occurrence of various defects is associated with thermal processes which accompanied the machining of products. During diamond abrasive machining, the structural influence of inhomogeneous surface layers of manufactured products leads to the appearance and development of various defects, such as cracks and chips. To determine the thermomechanical state of the working surface of the cylinder with a wear-resistant composite coating, which has partial delamination areas during the deposition process, an analytical model is available. On the basis of composite coatings Ni/Ni-TiO 2 , obtained by the method of electrochemical deposition, tribocorrosive studies were carried out. To ensure the required quality of wear-resistant coatings, rational treatment regimes of the respective groups were applied, as well as the instrument characteristics, taking into account hereditary defects when applying these coatings.