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Experimental Study to Improve the Castability of Aluminum Killed Cold Heading Steel
Author(s) -
Jun Yang,
BoTao Chen,
Wei Tang,
FanZheng Zeng,
Gang Yu,
Feng Shen
Publication year - 2013
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.201200246
Subject(s) - castability , refining (metallurgy) , metallurgy , materials science , aluminium , casting , heading (navigation) , melting point , calcium , slag (welding) , composite material , engineering , aerospace engineering
Experimental study on the LF refining of aluminum killed cold heading steel shows that calcium content in the molten steel increased to about 0.0010% at the end of refining, and the aluminum deoxized products were transformed from Al 2 O 3 to the complex inclusions CaO–MgO–Al 2 O 3 with lower melting point by the high basicity, high Al 2 O 3 , and strong deoxidizing slag. The inclusions are in liquid state and can be easily floated up during LF refining and continuous casting. The total oxygen content of the steel falls to about 0.0020%. The experimental technology uses only 50 m calcium wire to the 80‐t heat or even without calcium treatment. As compared to the traditional technology with higher amount of calcium for treatment, which forms CaS and CaO–MgO–Al 2 O 3 inclusions with high melting point, the experimental technology improves the castability and reduces the manufacturing cost.