CONTINUOUS-CASTING WITH SOLIDIFICATION BE LOW THE MENISCUS - METALLURGICAL RESULTS AND SOLIDIFICATION MODELING

CRM and Irsid are working jointly to develop a new feeding concept of vertical continuous casting machines. The new concept consists in a sh ifting of the meniscus position upstream so that the hydrodynamical pe rturbations of the liquid steel do not affect thesolidification. Cast billets (155 x 155 mm(2)) present a remarkable surface aspect at a cas ting speed of 2 m/min (oscillation mark depth of 100 um and reduced si ze of the primary grain). In parallel, a physical and numerical model of the solidifying shell in this new concept of vertical continuous ca sters is developed in collaboration with Ecole des Mines de Nancy.