9th ECCC European Continuous Casting Conference – ECCC 2017

Corner crack is one of the main defects which affects continuous casting slabs. It downgrades slab surface quality and requires further scarfing which is costly and time consuming. Chamfer mold technology is a new mold design which may reduce corner cracks occurrence during continuous casting process. Conventional continuous slab casting uses rectangular shape mold with 90°corners. Chamfer...

Following increasing market demand for thicker plates, work was carried out to increase the cast thickness of a 0.16% C – 1.5% Mn plate grade, microalloyed with Niobium, from 225 mm to 305 mm. This paper describes a surface quality issue encountered during the change and steps taken to investigate the cause. Specifically, fine transverse cracks were observed at around 150 to 300 mm in from the...

Based on the numerical simulation and industrial experiment research, the retention characteristics of the ultra-low carbon steel slab corner shape in the hot rolling process and its influence on the edge defects are analyzed. Numerical calculation results show that, the chamfered face changes to be circle arc during hot rolling process. The uniformity of stress distribution is improved. The...

The black and white band defects of type 304 stainless steel on the hot and cold rolled coils are chronic. The black and white band defects are subsurface defects and can be found chrome carbide in the defects on the surface of the hot rolled coils. The cause of chrome carbide is an increase of carbon near the oscillation mark on the subsurface of slab due to carbuizing of mold powder during...