| 摘要 |
A casting nozzle suitable for production of cast materials of pure magnesium and magnesium alloys. Nozzle (1) is used to feed a molten material between rolls (10) as a casting mold to thereby produce cast material (100), and arranged so that pouring port (4) is positioned between a pair of rolls (10) disposed opposite to each other. This nozzle (1) comprises main body (1a) of an oxide material, such as alumina, and coating layer (3) of a material substantially not containing oxygen, the coating layer (3) superimposed on an inner circumferential surface of the main body (1a) brought into contact with molten material. The main body (1a), as it is not brought into direct contact with molten material by means of the coating layer (3), can avoid any reaction of oxygen contained in the main body (1a) with molten material. Further, casting mold contact portion (2) of the nozzle (1) brought into contact with the rolls (10) is constituted of a heat-insulating material, so that cooling of the molten material within the nozzle (1) by the rolls (10) via the casting mold contact portion (2) can be avoided. |
