1999 / Solid Freeform Fabrication Proceedings
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Author C. Hauser, T. H. C. Childs, K. W. Dalgarno, R. B. Eane, The University of Leeds
Source Solid Freeform Fabrication Proceedings, 1999, pp 265-272
Abstract Stainless steel grade 314S powders have been Selective Laser Sintered (SLS) in three different argon/air (oxygen) atmospheric mixtures. The amount of oxygen present during the heating, melting and fusing of the metal powder strongly limits the range of laser powers and scanning speeds for successful processing. As oxygen levels diminish, powder oxidation reduces. This reduces absorption of laser energy as well as balling and other detrimental surface phenomena. This paper reports the conditions for creating sintered layers and observations of part quality variation within these conditions. Sintered microstructure observations are also helpful in determining thermal history changes. Keywords Atmosphere, Oxidation, Surface Tension, Metallography. (Auth abstract) [References: 6]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
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