Characterization of laser-borided Nimonic 80A-alloy

¹ Institue of Mechanical Technology, Faculty of Mechanical Engineering and Management, Poznan University of Technology, Poland
² Institue of Material Engineering, Faculty of Mechanical Engineering and Management, Poznan University of Technology, Poland

^* Corresponding author: piotr.a.kieruj@doctorate.put.poznan.pl

Abstract

Nimonic 80A-alloy belongs to Nickel-based superalloys. Many of them are used in variety branches of industry due to high strength and resistance in aggressive conditions. Moreover, its mechanical properties are kept in high temperature. However, these materials should be coated by appropriate wear protection, under conditions of considerable mechanical wear. Unfortunately, the production of thick borided layer in diffusion boriding required high temperature and long duration of this processes. Therefore, in this study instead conventional diffusion process laser boriding was applied in order to produce boride layer on Nimonic 80A-alloy substrate. Laser alloying is the high-tech process which allows to modify the chemical composition of the surface. Laser boriding was arranged as a single tracks, therefore it was possible to evaluate the influence of laser treatment parameters on thickness and hardness of produced layers. The laser beam power P, laser scanning speed v_l and laser beam diameter d_l were the variable parameters used during laser alloying.