| 摘要 |
Continuous casting of steel strip in twin-roll caster comprises casting rolls (16). Molten steel is delivered by a delivery system and comprising delivery nozzle (19b) to casting pool (30) supported above nip (10) between the casting rolls (16) which are rotated to deliver a solidified strip (20) downwardly from the nip. To avoid dissolution of carbon from refractories of the metal delivery system including the nozzle (19b), the molten steel is a silicon/manganese killed carbon steel having a manganese content of not less than 0.02 % by weight, a silicon content of not less than 0.10 % by weight, an aluminium content of less than 0.01 % by weight and a sulphur content of at least 0.02 % by weight. The required sulphur content of the steel may be achieved by addition of iron sulphide to a batch of steel in a tundish (18) of the delivery system.
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