Creation of a Combined Technology for Processing Parts Based on the Application of an Antifriction Coating and Deforming Broaching

This paper presents the research results on developing a combined technology for processing parts, which integrates methods of applying antifriction coatings and surface plastic deformation. The study revealed that the existing technologies for finishing antifriction non-abrasive treatments aimed at enhancing the tribological characteristics of the surface layer do not effectively strengthen it. For this issue, the proposal was to employ deforming broaching, which can harden the surface layer of the part and enhance the bond strength between the coating and the base material. Experimental investigations were conducted to examine the feasibility of the combined technology using samples made of cast iron EN-GJL-200. The study focused on analyzing geometrical changes resulting from deforming broaching and the alteration of physical-mechanical properties associated with implementing finishing antifriction abrasion-free machining operations. These investigations facilitated the development of various combined processing technologies, encompassing finishing antifriction abrasion-free processing and deforming broaching. Based on the obtained results, a technological process for restoring cylinder liners of internal combustion engines was devised. A comparison between the existing and proposed technological processes demonstrated the advantages and prospects offered by the proposed approach.