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Behaviour of master alloy during sintering of PM steels: redistribution and dimensional variations
KTH, School of Engineering Sciences (SCI), Mechanics, Physicochemical Fluid Mechanics.
KTH, School of Engineering Sciences (SCI), Mechanics, Physicochemical Fluid Mechanics.ORCID iD: 0000-0003-3336-1462
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2015 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, Vol. 58, no 2, 133-141 p.Article in journal (Refereed) Published
Abstract [en]

The addition of alloying elements in low alloyed PM steels in the form of a master alloy gives the advantage of introducing oxidation sensitive but less expensive elements and also allows manipulation in composition adjustment to achieve desired properties. In this work, interrupted sintering trials of the Fe-2MA-0.5C (%) (MA = Cu based master alloy) are performed. The behaviour of the liquid forming master alloy, for instance in terms of liquid phase formation, alloying element redistribution and effect on the dimensional changes, is investigated. The results show that master alloy particles melt over a range of temperature, which is also supported by the thermodynamic calculations. The low swelling in the master alloy system, compared to a reference system of Fe-2Cu-0.5C, is attributed to the progressive melting of the master alloy. The mean diffusion distance of Cu in Fe at the interparticle boundaries is 5.8 mu m after 34 min of isothermal holding.

Place, publisher, year, edition, pages
2015. Vol. 58, no 2, 133-141 p.
Keyword [en]
Master alloy, Cu redistribution, Dilatometry, Liquid phase behaviour, Thermo-Calc, Diffusion measurements
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-172258DOI: 10.1179/1743290114Y.0000000117ISI: 000355377900009OAI: diva2:847623

QC 20150820

Available from: 2015-08-20 Created: 2015-08-14 Last updated: 2015-08-20Bibliographically approved

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Tahir, Abdul MalikAmberg, GustavHedström, Peter
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