METHOD FOR CASTING Ti-Al BASED ALLOY
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsTomohiro NISHIMURA, Daisuke MATSUWAKA, Hitoshi ISHIDA
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Abstract
The objective of the present invention is to improve non-defective product yield by reducing shrinkage cavities inside small-diameter ingots, in a method for casting active metals. In this Ti—Al based alloy casting method for casting an ingot of Ti—Al based alloy by tapping molten metal from a tapping hole (5) provided in a bottom portion of a water-cooled copper crucible (2), in an induction melting furnace (3) employing said crucible (2), into a casting mold (4), the degree of vacuum inside the induction melting furnace (3) when the Ti—Al based alloy is being melted or cast is in a range of 80 to 700 Torr, and the Al concentration in the cast ingot is within ±1.0 mass % of a target value.
Claims1
A method for casting a Ti—Al based alloy comprising:
- tapping molten metal from a tapping hole provided in a bottom portion of a water-cooled copper crucible in an induction melting furnace;
- and
- casting an ingot of Ti—Al based alloy, wherein
- a degree of vacuum in the induction melting furnace at the time of melting or casting the Ti—Al based alloy is set within a range of 80 Torr to 700 Torr, and
- a concentration of Al of the cast ingot is set within ±1.0 mass % of a target value.
Dependencies are inferred from the claim text.