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Change of Inclusion Characteristics during Vacuum Degassing of Tool Steel
Author(s) -
Steneholm Karin,
Andersson Margareta,
Jönsson Pär
Publication year - 2006
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200606404
Subject(s) - inclusion (mineral) , slag (welding) , metallurgy , oxygen , materials science , chemical composition , composition (language) , mineralogy , chemistry , linguistics , philosophy , organic chemistry
The inclusion characteristics were studied during vacuum degassing by interrupting the operation at five different times after the start of operation. Slag and steel samples were collected and thereafter assessed with respect to steel and slag composition, total oxygen content, size distribution of inclusions and chemical composition of inclusions. The main conclusion is that the number of inclusions in the different size classes as well as the total oxygen content seem to reach a minimum value after around ten minutes of vacuum degassing. Furthermore, it seems to be a consistent trend that, during vacuum degassing, the top slag influences the inclusion composition.