CASTING IN AN EXOTHERMIC REDUCTION ATMOSPHERE

摘要

An apparatus and method for casting metal strip include a moving chill body (7) that has a quench surface (5). A nozzle mechanism (4) deposits a stream of molten metal on a quenching region of the quench surface (5) fo form the strip (6). The nozzle mechanism (4) has an exit portion (26) with a nozzle orifice (22). A depletion mechanism (8, 12) supplies a reducing gas (24) to a depletion region (13) located adjacent to and upstream from the quenching region (14). The reducing gas (24) reacts exothermically to lower the density provide a low density reducing atmosphere within the depletion and substantially prevent formation of gas pockets in the strip (6).