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Cu redistribution during sintering of Fe–2Cu and Fe–2Cu–0·5C compacts
KTH.
KTH.
Höganäs AB.
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2014 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, Vol. 57, no 5, 373-379 p.Article in journal (Refereed) PublishedText
Abstract [en]

The effective use of alloying elements in powder metallurgical steels requires a deep understanding of their redistribution kinetics during sintering. In this work, interrupted sintering trials of Fe–2Cu and Fe–2Cu–0·5C compacts were performed. Moreover, diffusion simulations of Cu in γ-Fe using Dictra were performed. It is found that transient liquid phase penetrates the Fe interparticle and grain boundaries in less than 3 min of holding time. However, C addition limits the penetration of liquid Cu, particularly into grain boundaries of large Fe particles. The results also show that the mean diffusion distance of Cu in γ-Fe in the C added system is slightly lower than that in the C-free system at 3 min of holding time; however, after 33 min, the mean diffusion distance is similar in both systems. The diffusion distances of Cu in γ-Fe, predicted by Dictra, are in good agreement with the measured values.

Place, publisher, year, edition, pages
2014. Vol. 57, no 5, 373-379 p.
Keyword [en]
Cu redistribution kinetics, Diffusion, Wetting, Microstructure, Dilatometry, SEM/EDXS, Dictra, Powder metallurgical steels
National Category
Metallurgy and Metallic Materials Engineering and Technology
Identifiers
URN: urn:nbn:se:sh:diva-30180DOI: 10.1179/1743290114Y.0000000085ISI: 000347974900011ScopusID: 2-s2.0-84919432962OAI: oai:DiVA.org:sh-30180DiVA: diva2:932456
Available from: 2014-05-15 Created: 2016-06-01 Last updated: 2016-06-01Bibliographically approved

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Amberg, Gustav
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