1999 / Solid Freeform Fabrication Proceedings
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Author C. Hauser, T. H. C. Childs, K. W. Dalgarno, The University of Leeds
Source Solid Freeform Fabrication Proceedings, 1999, pp 273-280
Abstract Metal powder bed pre-heating is a proposed route for the homogenisation of temperature gradients that can otherwise cause individual layer warping and cracking in direct metal Selective Laser Sintering (SLS). However, the high temperatures involved complicate a relatively simple process. This paper reports on the conditions for successful small scale SLS of binderless stainless steel 314S powders within the surrounds of a room temperature powder bed. Results show that a scan length around 15.0 mm and a scan spacing around 0.275mm produce sintered layers showing no signs of warping. Experimentation also indicates that single layer shape effects warping but length of layer propagation does not. Keywords Rapid. prototyping, Selective laser sintering, Processing, Part quality. (Auth abstract) [References: 6]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
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