Interaction of the oxyfluoride melts of Ca, Al, Mg, Si, Ba, and Cr with refractories based on alumina and magnesia

Бурцев, В. Т.; Serov, G. V.

doi:10.1134/s0036029509020049

Cited by 3 publications

(1 citation statement)

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“…The lack of the reaction interface in the experimental sample A4 may be because of the low Al content in the molten steel, which prevents the formation of the reaction interface. 38) Figures 4 and 5 that the reaction between the molten steel and the crucible produces Al 2 O 3 inclusions containing a small amount of MgO. At this time, the MgO content of the crucible reaction transition layer will diminish the activity of Al 2 O 3 ; therefore, the Al-O equilibrium test point is below the theoretical calculation value in the range of 0.001-0.01% Al content in molten steel.…”

Section: Reaction Of Mgo Crucible With Al-deoxidizedmentioning

confidence: 89%

Inclusion Control of 15-5 PH High-strength Stainless Steel through Aluminum Deoxidation

et al. 2023

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15-5PH high-strength stainless steel is an important alloy used for numerous critical components. Ultralow oxygen content and inclusion control have become urgent problems that need to be addressed for the broad application of this steel. In this study, we investigate the thermodynamic equilibrium of Al-O and inclusion morphology of 15-5PH stainless steel to understand the basic mechanism behind the results obtained after commercial production of the alloy. The deoxidation behavior of 15-5PH stainless steel depends on the dissolved Al content ([Al%]). When [Al%] < 0.001%, mixed Al-Si deoxidation occurs and the deoxidation product is Al 2 O 3 -SiO 2 -MnO-CrO x . When [Al%] ≥ 0.001%, simple Al deoxidation equilibrium is dominant and the deoxidation product is MgO•Al 2 O 3 . The formation of Al 2 O 3 -SiO 2 -MnO-CrO x , low melting point inclusions, and a MgO•Al 2 O 3 interface layer reduces the activity of Al 2 O 3 , which is why the calculated results of Al-O thermodynamic equilibrium are higher than the experimental results. The measured results for the Al-O equilibrium demonstrate a relatively good agreement with the calculated values. This proved that the phases formed on the crucible surfaces were in equilibrium with the Al and O contents in the molten steels after holding for 120 min.

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Section: Reaction Of Mgo Crucible With Al-deoxidizedmentioning

confidence: 89%