Microstructure and properties of Fe-base alloy fabricated using selective laser melting

Manlong Sun; Li Lu; Jerry Ying Hsi Fuh

doi:10.1117/12.456802

25 February 2002 Microstructure and properties of Fe-base alloy fabricated using selective laser melting

Manlong Sun, Li Lu, Jerry Ying Hsi Fuh

Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456802
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore

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.

Citation Download Citation

Manlong Sun, Li Lu, and Jerry Ying Hsi Fuh "Microstructure and properties of Fe-base alloy fabricated using selective laser melting", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); https://doi.org/10.1117/12.456802

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