Possibility to predict the surface quality of billets from C35 steel by using the laser triangulation method

Speaker:
Pindor, Lukas; Trinecke zelezarny as; Czech Republic

Authors:
Pindor, L.; Trinecke zelezarny; Czech Republic
Hermann, R.; Trinecke zelezarny; Czech Republic
Milata, R.; Trinecke zelezarny; Czech Republic
Tofel, P.; Brno University of Technology; Czech Republic
Sedlak, P.; Brno University of Technology; Czech Republic
Majzner, J.; Brno University of Technology; Czech Republic

ID: ECNDT-0260-2018

The laser triangulation method (LTM) was applied to complex evaluation of surface quality of continuously casted billets of C35 steel. Within the scope of work, a few series of laboratory hot-rolling experiments were performed to assess the deformation behaviour of various primary casting defects during the final product forming. Subsequently, laboratory rolled-out samples with identified transferred defects were thoroughly investigated by means of NDT method and metallography and the outcomes were finally used to adjust the settings of laser triangulation method for detection possibilities of surface defects typical for continuously casted billets. Based on the results, an optimization of billets grinding procedures especially in corner-regions was accomplished to achieve a stable surface quality of C35 steels.