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Proceedings Paper

Microstructure and properties of Fe-base alloy fabricated using selective laser melting
Author(s): Manlong Sun; Li Lu; Jerry Ying Hsi Fuh
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Paper Abstract

This paper studies recent advances in rapid tooling (RT) of high performance components via selective laser melting (SLM). The present study of SLM focuses on the development of materials used in injection molding. In the process, the pre-alloyed iron-base alloy powder was used to fabricate parts using a 3KW CO2 laser machine. Iron components with nearly full density have been directly produced under suitable laser parameters. The result of the SLM processed parts showed very fine dendrite microstructure. The surface hardness measured is 35-40 HRC, which is comparable to that of the AISI P20 steel (30-35 HRC). The advantages of this technique include elimination of a secondary infiltration process used by former selective laser sintering technology, reduced pre-processing time, and reduction in post- processing steps. The SLM process has a great potential in the field of RT.

Paper Details

Date Published: 25 February 2002
PDF: 4 pages
Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); doi: 10.1117/12.456802
Show Author Affiliations
Manlong Sun, National Univ. of Singapore (Singapore)
Li Lu, National Univ. of Singapore (Singapore)
Jerry Ying Hsi Fuh, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 4426:
Second International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Yong Feng Lu; Koji Sugioka; Jan J. Dubowski, Editor(s)

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