Influence of scanning velocity on Co24.7Cr5Mo5.4W alloy built via selective laser melting on roughness properties

Abstract

 The utilization of Selective Laser Melting (SLM) in the production of intricate metal items has gained 
significant attention in the medical and dental sectors. Products created using SLM must possess surfaces that exhibit 
a high degree of smoothness. The objective of this research is to examine the impact of various laser process 
parameters, specifically the scan rate and hatch spacing, on the surface roughness of Co-Cr dental alloys fabricated in 
three dimensions (3D) by selective laser melting (SLM) technology. The results indicate that a scanning speed of 700 
mm/s yields superior surface morphology and microstructure. The parameter investigation conducted in this paper 
resulted in the attainment of relative densities as high as 98.9% for the additively built workpieces. The present study 
focuses on investigating surface roughness in Co–Cr alloys fabricated using powder metallurgy techniques, namely 
selective laser melting.