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The effects of refractories of quartz-corundumconsisting of 45 mass% quartz and 55 mass% corun-dum, fused corundum and fused magnesia on thetotal oxygen content (TOC) and the composition ofinclusions in interstitial free (IF) steel were stud-ied.3 mass% microsilica was added into the threerefractories as binder. The refractories were shapedas linging of the graphite crucible by castable method.IT steel was placed in the crucible,then they were
The effects of refractories of quartz-corundum containing 45 mass% quartz and 55 mass% corun-dum, fused corundum and fused magnesia on the total oxygen content (TOC) and the composition ofinclusions in interstitial free (IF) steel were stud-ied.3 mass% microsilica was added into the three refractories as binder. The refractories were shaped as linging of the graphite crucible by castable method. IT steel was placed in the crucible, then they were