초록 ▼

An apparatus and process for the continuous casting of tubular shapes wherein molten metal from which the tubular shape is formed is centrifugally deposited adjacent to the outlet of a fluid-cooled mold by a nozzle assembly, with the metal being cooled and rapidly solidified by the mold to form a cy

An apparatus and process for the continuous casting of tubular shapes wherein molten metal from which the tubular shape is formed is centrifugally deposited adjacent to the outlet of a fluid-cooled mold by a nozzle assembly, with the metal being cooled and rapidly solidified by the mold to form a cylindrical shell upon which additional metal is deposited to incrementally build the thickness of the tubular shape. The tubular shape being formed is withdrawn continuously from the mold, and is further cooled by coolant directed thereon. The nozzle assembly may be rotated to discharge the molten metal or, alternatively, the mold may be rotated as the metal is deposited thereon. Single-layer tubular shapes, with or without reinforcing material, may be cast and multiple-layer composite shapes may be produced having layers of different material composition and thicknesses. An inert atmosphere is maintained to prevent oxidation of the molten metal. Tubular shapes cast may be longitudinally split and flattened to form sheet metal having desirable, refined microstructures.

대표청구항 ▼

An apparatus for forming a continuous tubular metallic article from a molten metal comprising: a mold having an interior passage with an outlet and cooled by a circulating heat transfer fluid; a nozzle assembly for discharging the molten metal at a location in said interior passage adjacent to said

An apparatus for forming a continuous tubular metallic article from a molten metal comprising: a mold having an interior passage with an outlet and cooled by a circulating heat transfer fluid; a nozzle assembly for discharging the molten metal at a location in said interior passage adjacent to said outlet where the metal is rapidly cooled and solidified to form a tubular article, said nozzle assembly having a plurality of orifices through which said metal is discharged, at least one of said orifices directing a first quantity of molten metal toward said interior passage, and at least one other orifice directing a second quantity of molten metal downstream of and adjacent to said outlet where the second quantity of molten metal is disposed on the solidified first quantity of metal; means for rotationally distributing the molten metal in said interior passage; means for continuously withdrawing the tubular article from said mold; and means disposed adjacent to said mold outlet for directing a second heat transfer fluid onto the tubular article. A process for forming a continuous tubular metallic article from a molten metal comprising the steps of: providing a mold having an interior passage with an outlet and cooled by a circulating heat transfer fluid; discharging the molten metal through a nozzle assembly at a location in said interior passage adjacent to said outlet where the metal is rapidly cooled and solidified to form a tubular article, said nozzle assembly having a plurality of orifices, at least one of which directs a first quantity of molten metal toward said interior passage, and at least one other orifice directs a second quantity of metal downstream of and adjacent to said outlet where the second quantity of molten metal is disposed on the solidified first quantity of metal; rotationally distributing the molten metal in said interior passage; continuously withdrawing the tubular article from said mold; and further cooling the tubular article exteriorly of the mold as it is being withdrawn.