9th ECCC European Continuous Casting Conference – ECCC 2017

The demands for AHSS have gradually increased due to their ability to reduce vehicle weight as a means to save energy, and to reduce the environmental impact. However, the successful design of AHSS often require the addition of large amounts of alloying elements such as aluminum, which make it difficult to cast sound slabs without surface defects. When casting high aluminum AHSS, due to the...

High Al steel containing Al more than a percent has been recently developed which increases specific strength significantly by forming very fine FeAl intermetallic compounds in the matrix. For a successful commercial production, continuous casting is prerequisite, but the high Al content causes serious trouble for the casting practice due to strong reaction between Al and SiO2 in mold flux. ...

A Molten mold flux technology so called, POCAST process has been newly used to enhance the slab quality of Ultra Low Carbn Steel(0.001~0.002 C%). Due to the thicker slag layer and higher temperature of meniscus, POCAST technology can influence in many ways; shorten the hook length, decreased C-pickup on the slab surface, less inclusion within the slab, enhancing the slab lubrication and etc.....

Optimization of CaO-SiO2-CaF2 based flux in a continuous steel caster should be determined from the view point of dual viscous functions for minimizing slab surface defects - high viscosity enough to alleviate flux entrainment at mold top surface where shear rate is about 10 – 40 reciprocal second and low viscosity enough to maximize lubrication capability at oscillated mold wall region where...