Análise da integridade superficial na retificação dupla face de anéis de pistão de aço inoxidável ISO 6621- 3 MC 66 Nitretado

Abstract

In Grinding, geometrical irregularities called surface texture and surface integrity are normally controlled. To obtain a good surface texture and better surface integrity, depends to a large extend on choosing the cutting parameters. These parameters are the cutting speed, the table speed and the depth of cut per pass. This work presents the influence of these parameters on the finishing surface and the subsurface when their levels are changed. The finishing surface, residual stresses and surface alterations were analysed. A 23 factorial design was used in the surface finish evaluation. The results of the analysis prove that in the double disc grinding with CBN of hardened steels ISO 6621-3 subclass MC 66, there is no thermal damage on the surface and the residual stresses have a tendency to be compressive on the surface and higher when grinding conditions are not soft. The influence of the cutting speed, table speed and depth of cut was not significant, but their interactions, were found to play a more significant role in the finishing surface.