9th ECCC European Continuous Casting Conference – ECCC 2017

We have investigated lamination defects (slivers) on hot rolled coils of Ca-treated steel for microstructure and composition using optical and scanning electron microscopy combined with microanalysis (SEM/EDS). The goal was to identify possible origins for the observed defects which contain a complex assemblage of phases, such as different types of calcium aluminates (CA, CA2, CA6), melilite...

The mold flux is the most important thing for the lubrication between the mold and initial solidification shell in continuous casting process. However, in the process, the mold slag generated by the mold flux is entrained into molten steel and brings about the surface defects of IF steel. Generally, in order to reduce the entrainment of the mold slag, continuous casting plants have tried to...

Oscillation marks (OMs) can be classified into depression OMs and hook-like OMs, near which subsurface hook structures appear in ultra-low-carbon steel of continuous casting slabs. In the current study, the hooks of whole-leaf type, truncated type, re-solidified type and double-hook type were observed, and bubbles were found below hooks, indicating that hooks could capture the floating...

As grain refinement can bring the substantial improvement of mechanical properties of as-cast and further rolled materials by reduction of segregation during solidification. Many studies, therefore, have been reported on grain refinement of as-cast structure by formation of inclusions based on so-called Oxide Metallurgy. However, there are also many problems in Oxide Metallurgy in terms of...

Rice husk ash on the molten slag is usually composed of solid powder layer, sintered powder layer and interface between the molten slag and sintered powder layer in continuous casting tundish. Because the complicated reaction at the molten slag-sintered powder interface has not been well understood, we investigated the effect of rice husk ash on the reoxidation of molten steel as well as on...