Formation and Removal Mechanism of Nonmetallic Inclusions in 42CrMo4 Steel during the Steelmaking Process
نویسندگان
چکیده
Nonmetallic inclusions are harmful to the quality of 42CrMo4 steel. Therefore, formation and removal mechanism in steel during steelmaking process is investigated by industrial trials. The characteristics specimens were analyzed scanning electron microscopy energy dispersive spectroscopy. main type molten early stage ladle furnace (LF) refining MgO-Al2O3 irregular shape. CaO begins appear middle late stages LF. In vacuum degassing (VD) stage, completely change into low-melting-point CaO-MgO-Al2O3 inclusions. existence [Mg] fundamental reason for a large number Thermodynamic calculation shows that refractory mainly transfers liquid LF whereas slag VD stage. Kinetic indicates could be removed from faster than different behavior two types interfacial tension between 50% lower
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ژورنال
عنوان ژورنال: Metals
سال: 2022
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met12091505