Study of macro-segregations in a continuously cast billet

Abstract

This paper is devoted to the study of macro-segregations on the longitudinal section of a continuously cast billet Ø 160 mm destined for the production of seamless pipes. Its evaluation comprised a visual inspection of macro-etching, microstructure characterisation and a quantitative X-ray microanalysis by means of an energy-dispersive X-ray microanalysis (EDX) in the selected areas. Furthermore, segregation parameters were calculated using combustion-analysis data. The results given in this paper present the basic information about the interior structure of a continuously cast billet. The results will be used, beside other things, for the verification of the results of the numerical modelling of continuously cast billets. Keywords: steel, macro-segregation, continuous casting, round billet Ta~lanek obravnava {tudij makro-izcej na vzdol`nem prerezu kontinuirno ulite gredice Ø 160 mm namenjene za proizvodnjo brez{ivnih cevi. Ocena je sestavljena iz vizuelnega pregleda po makrojedkanju, iz ocene in kvantitativne rentgenske mikroanalize s pomo~jo energijsko disperzijske rentgenske analize (EDX) izbranih podro~ij. Izra~unani so bili tudi parametri izcejanja s pomo~jo podatkov zgorevne analize. Rezultati, prikazani v tem~lanku, predstavljajo osnovno informacijo o notranji strukturi v kontinuirno uliti gredici. Rezultati bodo uporabljeni, poleg drugega, tudi za preverjanje rezultatov numeri~nega modeliranja kontinuirno ulitih gredic.

Optimizing of steel flow in three-strand T-type tundish using mathematical and physical models

“…The aim of optimizing of the tundish furniture by changing the angles of the holes in the tundish baffle is to minimize the differences in residence time between 2nd (middle), 1st and 3rd (lateral) casting strands while respecting the requirement to eliminate excessive wear of tundish working lining at the slag line area caused by dynamic steel flow in the inlet section [13,14,15]. All the simulations above are compared with the standard (currently used) configuration of the tundish -marked as the standard configuration 0 °.…”