Continuous casting method for ingot produced from titanium or titanium alloy

摘要

By controlling the temperature (TS) of a surface portion (11a) of an ingot (11) in a contact region (16) between a mold (2) and the ingot (11) and/or a passing heat flux (q) from the surface portion (11a) of the ingot (11) to the mold (2) in the contact region (16), the thickness (D) in the contact region (16) of a solidified shell (13) obtained by the solidification of molten metal (12) is brought into a predetermined range. Consequently, an ingot having a good casting surface state can be cast.

主权项

1. A continuous casting method for continuously casting an ingot made of titanium or a titanium alloy by injecting molten metal having titanium or a titanium alloy melted therein into a bottomless mold and withdrawing the molten metal downward while being solidified,
wherein, by controlling temperature of a surface portion of the ingot in a contact region between the mold and the ingot, and/or a passing heat flux from the surface portion of the ingot to the mold in the contact region, thickness of a solidified shell formed by solidifying the molten metal in the contact region is brought into a predetermined range, wherein average values of the temperature Ts of the surface portion of the ingot in the contact region are controlled into the range of 800° C.