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Process Technological Develpoments for Improvement of the Castability of High‐Carbon Steels
Author(s) -
Bolender Thorsten,
Kaiser Heinz Peter,
Pluschkell Wolfgang,
Wünnenberg Klaus
Publication year - 2003
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.200300159
Subject(s) - castability , metallurgy , materials science , liquidus , clogging , carbon fibers , nuclear chemistry , chemistry , aluminium , composite material , alloy , archaeology , composite number , history
Steels for rail‐making involve standard requirements concerning oxide cleanness. Castability problems do not generally occur. Due to the extremely high demands on cleanness, roller‐bearing steel 100Cr6 is cast using narrow SENs, which are extremely susceptible to clogging. Problems caused by clogging occur despite the fact that these heats are deoxidized using C, Si and Mn, with no addition of Al. Castability improved significantly after conversion to low‐Al ferrosilicon for deoxidation and rinsing of ladles with carbon‐deoxidized preceding heats. Casting temperature with a superheat of 30°C and a reduction in Al content to less than 20 ppm made it possible to increase sequence length to three heats.