Influence of Selected Finishing Technologies on the Roughness Parameters of Stainless Steel Manufactured by Selective Laser Melting Method
The new progressive method of 3D metal printing SLM (Selective Laser Melting) is increasingly expanded into the normal operation. As a result, greater demands are placed on the surface quality of the parts produced in this way. The article deals with research of selected finishing methods (tumbling, face milling, sandblasting, shot peening and brushing) and their impact on the final surface roughness. The 20 x 20 x 7 mm produced specimens using SLM additive technology on the Renishaw AM400 were subjected to testing of these finishing methods by adjusting various parameters. Surface parameters of roughness Sa, Sz were chosen as the evaluation criteria and profile parameters Ra, Rz were used as additional measurements. Optical measurement of surface roughness was performed on Alicona Infinite Focus 5. An experiment conducted to optimize the surface roughness revealed, as expected, that the best roughness parameters were achieved through a face milling operation. Tumbling is particularly suitable for 3D printing components, as tumbling media are able to reach even complex shapes and, after changing to polishing bodies, achieve a high surface gloss. Surface quality after tumbling depends on the process time. Other methods with satisfactory results are shot peening and tumbling, which should be the focus of further research.
 Du, W., Bai, Q., Zhang, B. A novel method for additive/subtractive hybrid manufacturing of metallic parts, Procedia Manuf. 5 (2016) 1018–1030.
 Löber, L., Flache, Ch., Petters, R., Kühn U., Eckert, J. Comparison of different post processing technologies for SLM generated 316l steel parts. Rapid Prototyping Journal. DOI: 10.1108/13552541311312166. ISSN 1355-2546.
 Moton, W, S Grenn, A Rennie, T Abram. Surface finishing techniques for SLM manufactured stainless steel 316L components. Bártolo, Paulo, Ana de Lemos, Ana Tojeira, et al., ed. Innovative Developments in Virtual and Physical Prototyping (online). CRC Press, 2011, 2011-09-16, pp. 503-509. DOI: 10.1201/b11341-82. ISBN 978-0-415-68418-7.
 Kaynak, Y., Ozhan K. The effect of post-processing operations on surface characteristics of 316L stainless steel produced by selective laser melting. Additive Manufacturing. DOI: 10.1016/j.addma.2018.12.021. ISSN 22148604.
 Zhang, J., Chaudhari, A., Wang, H. Surface quality and material removal in magnetic abrasive finishing of selective laser melted 316L stainless steel, Journal of Manufacturing Processes, Volume 45, 2019, Pages 710-719, ISSN 1526-6125.
 Campanelli, S.L., G. Casalino, N. Contuzzi a A.D. Ludovico. Taguchi Optimization of the Surface Finish Obtained by Laser Ablation on Selective Laser Molten Steel Parts. Procedia CIRP. DOI: 10.1016/j.procir.2013.09.079. ISSN 22128271.
 Benoit R., Mognol, P., Hascoët, J-Y. Laser polishing of additive laser manufacturing surfaces. Journal of Laser Applications, Laser Institute of America, 2015, 27, pp.S2.
 Podhorský Š. Plazmové Leštenie Tvarovo Zložitých Kovových Predmetov. Metal 2007
 Hua, Li., Ramezani, M., Li, M., Ma, CH., Wang, J. Tribological performance of selective laser melted 316L stainless steel. Tribology International (online). 2018, 128, 121-129. DOI: 10.1016/j.triboint.2018.07.021. ISSN 0301679X
 Yamaguchi, H., Fergani, O., Wu, P-Y. Modification using magnetic field-assisted finishing of the surface roughness and residual stress of additively manufactured components. CIRP Annals. 2017, 66(1), DOI: 10.1016/j.cirp.2017.04.084. ISSN 00078506.
 SS 316L - 047: Powder for additive manufacturing. Renishaw: apply innovation. United Kingdom: Renishaw, 2015
 Renisha W. Investigating the effects of multiple re-use of Ti6Al4V powder in additive manufacturing (AM). Renishaw, 2016