Direct Cast Titanium Alloy Strip

摘要

This research project successfully demonstrated the feasibility of inductionmelting titanium alloys in a segmented copper crucible and casting them into solid strip up to 300 mm (12 in) wide from a unique graphite tundish using melt overflow rapid solidification technology (MORST). A U.S. Patent Application was filed on the invention. Ti-6Al=4V, Ti-14Al=21Nb and Ti-34Al-4V alloys were cast into 300=mm (12-in)-wide strip. The system casts strip that has low levels of oxygen, hydrogen, nitrogen and carbon. There was no evidence of carbon contamination from the graphite tundish. The objective of casting of 0.125-mm (0.005-in)-thick strip was also realized in casting strip up to 32 mm (1.5 in) wide. (ttl)