Rapid production of hollow SS316 profiles by extrusion based additive manufacturing

Kedarnath Rane, Salvatore Cataldo, Paolo Parenti, Luca Sbaglia, Valerio Mussi, Massimiliano Annoni, Hermes Giberti, Matteo Strano

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

18 Citations (Scopus)
3 Downloads (Pure)

Abstract

Complex shaped stainless steel tubes are often required for special purpose biomedical equipment. Nevertheless, traditional manufacturing technologies, such as extrusion, lack the ability to compete in a market of customized complex components because of associated expenses towards tooling and extrusion presses. To rapid manufacture few of such components with low cost and high precision, a new Extrusion based Additive Manufacturing (EAM) process, is proposed in this paper, and as an example, short stainless steel 316L complex shaped and sectioned tubes were prepared by EAM. Several sample parts were produced using this process; the dimensional stability, surface roughness and chemical composition of sintered samples were investigated to prove process competence. The results indicate that feedstock with a 316L particle content of 92.5 wt. % can be prepared with a sigma blade mixing, whose rheological behavior is fit for EAM. The green samples have sufficient strength to handle them for subsequent treatments. The sintered samples considerably shrunk to designed dimensions and have a homogeneous microstructure to impart mechanical strength. Whereas, maintaining comparable dimensional accuracy and chemical composition which are required for biomedical equipment still need iterations, a kinematic correction and modification in debinding cycle was proposed.

Original languageEnglish
Title of host publicationProceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
EditorsGianluca Buffa, Livan Fratini, Giuseppe Ingarao, Rosa Di Lorenzo
Number of pages6
Volume190
ISBN (Electronic)9780735416635
DOIs
Publication statusPublished - 2 May 2018
Event21st International ESAFORM Conference on Material Forming, ESAFORM 2018 - Palermo, Italy
Duration: 23 Apr 201825 Apr 2018

Publication series

NameAIP Conference Proceedings
Volume1960
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference21st International ESAFORM Conference on Material Forming, ESAFORM 2018
Country/TerritoryItaly
CityPalermo
Period23/04/1825/04/18

Keywords

  • extrusion
  • stainless steel 316L
  • tubes
  • additive manufacturing
  • shaped stainless steel tubes
  • dimensional stability
  • surface roughness
  • chemical composition

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