|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Effect of Casting Speed on Hot Ductility and Precipitation Kinetics of Micro-alloyed Steels during Continuous Casting
||Hossam Ibrahim, Heinz Palkowski
|On-Site Speaker (Planned)
Different grades of steel slabs are subjected to cracking, taking place in the casting shop or even on the route to hot rolling. One of the causes is the low ductility during straightening at a temperature range between 700 °C – 1100 °C which might lead to surface cracking. This effect is believed to be due to the presence of titanium and niobium precipitates at higher temperature ranges and a low percentage of formed ferrite during unbending at lower temperatures.
The hot ductility of a steel with 0.08% C, 0.12% Ti and 0.04% Nb was tested at different strain rates and temperatures using DIL805 thermo-mechanical simulator. The effect of thermal cycle and deformation on the precipitates was investigated by means of SEM and EDX analysis. The composition and size of precipitates were modelled by MatCalc software. It could be shown that reducing the casting speed is detrimental to hot ductility.
||Planned: None Selected