Selective Laser Sintering (SLS), has become one of the most popular technique in the layer manufacturing processes because of the ability to build complex geometries models with a wide range of materials. Recently, the interest in SLS is mainly focused into metals because of the possibility of producing models not only for the prototyping step but also as functional parts. Driven by the need to process nearly full dense objects, with mechanical properties comparable to those of bulk materials and by the desire to avoid long post processing cycles, Selective Laser Melting (SLM) has been developed. SLM represents an evolution of the SLS process: in the first one the complete melting of powder occurs rather than sintering or partial melting of the second one. SLM, is mainly suitable to produce tools and inserts with internal undercuts and channels for conformal cooling for injection molding. A careful control of the parameters which influence the melting and the amount of energy density involved in the process is necessary to get parts with optimized quality. The aim of this paper was to study the effect of the main process parameters (laser power, scan speed, scan spacing, hatch spacing, scanning strategy) and of thermal treatments on the quality of built parts in terms of hardness, density, microstructure, and mechanical properties. The 18 Ni Marage 300 steel, one of the most used materials in the die industry was investigated, using a Nd:YAG laser with a maximum power of 100W

Manufacturing of 18 Ni Marage 300 steel samples by selective laser melting / Campanelli, Sabina L.; Contuzzi, Nicola; Ludovico, Antonio D.. - STAMPA. - 83-86:(2010), pp. 850-857. (Intervento presentato al convegno International Conference on Advances in Materials and Processing Technologies, AMPT 2008 tenutosi a Manama, Bahrain nel November 2-5, 2008) [10.4028/www.scientific.net/AMR.83-86.850].

Manufacturing of 18 Ni Marage 300 steel samples by selective laser melting

Sabina L. Campanelli;Nicola Contuzzi;Antonio D. Ludovico
2010-01-01

Abstract

Selective Laser Sintering (SLS), has become one of the most popular technique in the layer manufacturing processes because of the ability to build complex geometries models with a wide range of materials. Recently, the interest in SLS is mainly focused into metals because of the possibility of producing models not only for the prototyping step but also as functional parts. Driven by the need to process nearly full dense objects, with mechanical properties comparable to those of bulk materials and by the desire to avoid long post processing cycles, Selective Laser Melting (SLM) has been developed. SLM represents an evolution of the SLS process: in the first one the complete melting of powder occurs rather than sintering or partial melting of the second one. SLM, is mainly suitable to produce tools and inserts with internal undercuts and channels for conformal cooling for injection molding. A careful control of the parameters which influence the melting and the amount of energy density involved in the process is necessary to get parts with optimized quality. The aim of this paper was to study the effect of the main process parameters (laser power, scan speed, scan spacing, hatch spacing, scanning strategy) and of thermal treatments on the quality of built parts in terms of hardness, density, microstructure, and mechanical properties. The 18 Ni Marage 300 steel, one of the most used materials in the die industry was investigated, using a Nd:YAG laser with a maximum power of 100W
2010
International Conference on Advances in Materials and Processing Technologies, AMPT 2008
978-0-87849-297-8
Manufacturing of 18 Ni Marage 300 steel samples by selective laser melting / Campanelli, Sabina L.; Contuzzi, Nicola; Ludovico, Antonio D.. - STAMPA. - 83-86:(2010), pp. 850-857. (Intervento presentato al convegno International Conference on Advances in Materials and Processing Technologies, AMPT 2008 tenutosi a Manama, Bahrain nel November 2-5, 2008) [10.4028/www.scientific.net/AMR.83-86.850].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/8966
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