Influence of Laser Scan Speed on the Relative Density and Tensile Properties of 18Ni Maraging Steel Grade 300

Abstract

Laser powder bed fusion (LPBF) enables tool makers to design tools with complex geometries and internal features. To exploit the possibilities provided by LPBF it is necessary to understand how the processing parameters influences the properties of the end-product. This study investigates the effect of laser scan speed on relative density and tensile properties of 18Ni300 in the as-built condition. The results show that there is a relatively wide processing window which gives satisfactory relative density and tensile properties. Furthermore, it was shown that the scan speed which produced the highest relative density in this study did not provide satisfactory tensile properties, indicating that processing parameters can not be established based on relative density measurements alone.