| 摘要 |
PURPOSE: A cast steel composition is provided that can substitute an existing C-Mn cast steel for slag pot for a material in which cracks due to thermal fatigues are less generated, thereby extending the life cycle of the slag pot by improving thermal fatigue properties. CONSTITUTION: The cast steel for slag pot having superior thermal fatigue properties comprises 0.05 to 0.15 wt.% of C, 0.3 to 1.5 wt.% of Cu, 0.8 to 1.3 wt.% of Mn, 0.025 wt.% or less of P, 0.025 wt.% or less of S, 0.6 wt.% or less of Si, 0.1 to 2 wt.% of Ni, 0.35 to 0.4 wt.% of Cr, 0.45 to 0.55 wt.% of Mo, 0.05 to 0.15 wt.% of Nb or V or a combination thereof, 0.02 to 0.06 wt.% of Al and 0.011 to 0.02 wt.% of N.
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