Proceedings of The Twelfth International Ferroalloys Congress Sustainable Future pages:935-944
INFACON XII 2010 - The Twelfth International Ferroalloys Congress edition:12 location:Helsinki, Finland date:6-9 June 2010
Ferroalloys are added during secondary steelmaking to impart special properties to the steel. Depending upon the ferroalloy quality this may lead to the formation of inclusions. The present knowledge lacks in the exact content of the individual elements and the nature of inclusions dispersed in the ferroalloys. In order to broaden the knowledge concerning ferroalloys’ quality, five different ferroalloy grades (i.e. FeMo, FeNb, FeTi70, FeTi35 and FeP) were characterised for the impurity content. The ferroalloy samples were investigated for chemical analysis (ICP-AES and LECO combustion technique) and microstructural analysis (SEM-EDS). These impurities are linked to the ferroalloy manufacturing route. The inclusions observed in the microstructure are in good agreement with the inclusions extracted by the dissolution technique. In the present manuscript, the possible influence of ferroalloy quality over steel cleanliness is evaluated in the context of the impurities extracted and observed in the ferroalloys.
poster presentation + published in full in proceedings