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Metals 2017, 7(6), 186; doi:10.3390/met7060186

The Influence of Deoxidation Practice on the As-Cast Grain Size of Austenitic Manganese Steels

1
Department of Materials and Manufacturing, School of Engineering, Jönköping University, 551 11 Jönköping, Sweden
2
Swerea SWECAST AB, 553 22 Jönköping, Sweden
3
Sandvik SRP, 233 81 Svedala, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Filippo Berto
Received: 12 April 2017 / Revised: 8 May 2017 / Accepted: 22 May 2017 / Published: 24 May 2017
View Full-Text   |   Download PDF [1937 KB, uploaded 24 May 2017]   |  

Abstract

The effect of in-situ precipitating particles on the grain size of Al-Ti-treated and untreated Hadfield steel cast in a pilot scale environment was studied. Hadfield steel was melted in an induction furnace and cast in Y-Block samples. Light Optical Microscopy (LOM) and the intercept method were utilized for the grain size measurements. Additionally, Thermo-Calc Software TCFE7 Steels/Fe-alloys database version 7 was used for thermodynamic equilibrium calculations of the mole fraction of particles. The planar disregistry values between the austenite and the precipitating particles were calculated. It was observed that increasing oxide content in samples with low Ti(CN) content resulted in a finer microstructure, while increasing the Ti(CN) content under similar oxide content levels led to a coarser microstructure. The potency of each type of particle to nucleate austenitic grains was determined. Spinel (MnAl2O4, MgAl2O4) particles were characterized as the most potent, followed by olivine (Mn2SiO4), corundum (Al2O3, TiO2), and finally Ti(CN), the least potent particle. View Full-Text
Keywords: Hadfield steel; grain size; austenite; deoxidation; particles; aluminum; titanium; oxides; titanium nitrides Hadfield steel; grain size; austenite; deoxidation; particles; aluminum; titanium; oxides; titanium nitrides
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Siafakas, D.; Matsushita, T.; Lauenstein, Å.; Ekengård, J.; Jarfors, A.E.W. The Influence of Deoxidation Practice on the As-Cast Grain Size of Austenitic Manganese Steels. Metals 2017, 7, 186.

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