The influence of intergranular oxidation on surface crack formation in continuous casting of steel

• DOI: 10.1016/j.jmrt.2023.09.214
• Publication Date: 2023-09-23T15:30:27Z
• Authors: Georg Gaiser; Roman Krobath; Peter Presoly; Christian Bernhard
• Keywords: Oxidizing agent

High-temperature oxidation phenomena play an important role in steel processing. What is mostly underrated the importance of internal casting processes, namely continuous process. To investigate impact intergranular on surface defect formation, experiments for two cooling strategies and time sequences a conventional slab caster were conducted. As influence silicon high-temperature well known its effect ductility marginal was chosen as alloying element to provoke oxidation. The methods used In-Situ Material Characterization by Bending test (IMC-B), which provides investigation susceptibility crack formation 3-point bending under oxidizing testing conditions simultaneous thermal analysis well-controlled study phenomena. results show that during cycle supporting highly conditions, favors low-melting eutectic (FeO-Fe2SiO4) at interface, infiltrating along austenite grain boundaries. formed has depth less than 50 μm but leads stress concentration subsequent tensile deformation. In consequence, cracks may easily nucleate propagate A change composition reducing content almost zero or harmful temperature sequence reduces subsequently formation.