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Possibilities and constraints of implementing starch consolidated high speed steel in prototyping
Högskolan Dalarna, Akademin Industri och samhälle, Materialvetenskap.
Högskolan Dalarna, Akademin Industri och samhälle, Materialvetenskap.
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2008 (Engelska)Ingår i: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 475, nr 1-2, s. 34-38Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the starch consolidation (SC) process, a water-based slurry containing powder, starch, dispersant and thickener is used to fabricate near net-shape green bodies that are de-binded and further consolidated by sintering. In this study, gas atomized M3/2 as well as high and low carbon V-rich M4 type high speed steel powder (<150 mu m) are considered, Both material types undergo high volumetric shrinkage during super-solidus liquid phase sintering enabling them to reach near full density. The analyses and the review cover different process aspects like: recipe optimisation, post-gelatinization drying, de-binding and sintering. A SC recipe consisting of 58 vol.% powder, 3 vol.% starch, 1 vol.% dispersant and a thickener solution resulted in a density of >98% than what is theoretically stated after sintering. It is found that the success of the post-gelatinization drying procedure depends on the smoothness of mould material and controlling powder oxidation. The best combination was freeze drying the slurry in a silicon rubber mould. For V-rich alloys a total or partial control of eutectic carbides in the final microstructure could be realized for vacuum and nitrogen sintering atmospheres, respectively.

Ort, förlag, år, upplaga, sidor
2008. Vol. 475, nr 1-2, s. 34-38
Nyckelord [en]
powder metallurgy, high speed steel, starch consolidation, prototyping, SLPS, review
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:du-2720DOI: 10.1016/j.msea.2006.12.142ISI: 000253693100008OAI: oai:dalea.du.se:2720DiVA, id: diva2:519820
Konferens
International Symposium on Inorganic Interfacial Engineering 2006
Tillgänglig från: 2007-04-11 Skapad: 2007-04-11 Senast uppdaterad: 2017-12-07Bibliografiskt granskad

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Harlin, PeterOlsson, Mikael
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Materials Science & Engineering: A
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Totalt: 625 träffar
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