Increased wear resistance of piston rings

Abstract

One way to improve the performance properties of cast iron piston rings, exposed to abrasion, is boriding. However, the use of traditional boriding methods, associated with diffusion of boron into a solid phase, leads to the formation of a working layer having high brittleness. Therefore, the actual problem is the development of a different method of surface hardening, not leading to embrittlement. Implementation of such a process can be carried out using laser heating accompanied by surface layer melting. The properties of the product on which a borated layer is applied depend on the depth of the latter.