摘要
The effects of refractories of quartz-corundum, consisting of 45mass% quartz and 55mass% corundum, fused corundum and fused magnesia on the total oxygen content (TOC) and the composition of inclusions in interstitial free (IF) steel were stud-ied. 3 mass % microsilica, Was added into the three refractories as binder. The refractories were shaped as lining of the graphite crucible by castable method., IF steel was placed in the crucibles, then they were heated at 1600℃ for 90min and 45min respectively. Oxygen contents of the steel samples were obtained by oxygen determinator . Inclusions were analyzed by SEM and EDS. The results show that the TOC of steel increased with increase of Index of Oxygen Potential (IOP) of the refractories. The steel sample coped with MgO refractories having the lowest IOP has the lowest TOC.
The effects of refractories of quartz-corundum, consisting of 45mass% quartz and 55mass% corundum, fused corundum and fused magnesia on the total oxygen content (TOC) and the composition of inclusions in interstitial free (IF) steel were stud-ied. 3 mass % microsilica, Was added into the three refractories as binder. The refractories were shaped as lining of the graphite crucible by castable method., IF steel was placed in the crucibles, then they were heated at 1600℃ for 90min and 45min respectively. Oxygen contents of the steel samples were obtained by oxygen determinator . Inclusions were analyzed by SEM and EDS. The results show that the TOC of steel increased with increase of Index of Oxygen Potential (IOP) of the refractories. The steel sample coped with MgO refractories having the lowest IOP has the lowest TOC.
基金
The project is sponsored by China National Nature Science Fund and Bao Steel,Shanghai(50174041)
