Ovlivnění parametru drsnosti metodou re-melting materiálu AlSi10Mg v procesu SLM

Abstract

This thesis investigates the effect of the re-melting method on the surface roughness of parts made of aluminium alloy AlSi10Mg using selective laser melting (SLM) technology. The surface quality of parts made by SLM is often limited by surface roughness, which can negatively affect their mechanical properties and subsequent use. Re-melting, or repeated surface melting, is one method of improving surface quality in additive manufacturing. This process allows the reduction of surface roughness by better smoothing of the melt layer. The aim of this work is to analyze the parameters of the re-melting process, such as the laser power used or the number of remelting cycles, affecting the resulting surface roughness and surface hardness of AlSi10Mg parts. According to the results obtained in this work, it has been found that it is not possible to clearly determine the best combination of suitable hardness and surface roughness of the sample. It is therefore necessary to know the intended use of the product in order to determine what properties the product should achieve. If a trade-off between sample properties were sought, one would have to look at a group of samples printed at 200 W for both properties under investigation. The results may contribute to improving the quality of additively manufactured metal parts and expanding their industrial applications.