METHOD FOR MANUFACTURING PURE TITANIUM INGOT, AND PURE TITANIUM INGOT

摘要

PROBLEM TO BE SOLVED: To provide a method for easily and inexpensively manufacturing a large pure-titanium ingot by using cut scrap and cut pieces generated in a working process for a titanium material, and a titanium sponge containing relatively high contents of oxygen, nitrogen, and iron, namely, relatively low purity of titanium, and to provide a pure titanium ingot.;SOLUTION: The method for manufacturing the pure titanium ingot comprises a step of forming a consumable electrode by arranging the first titanium material containing an O content of 0.07 wt.% or less, an N content of 0.009 wt.% or less, and an Fe content of 0.05 wt.% or less, on a periphery, and arranging the second titanium material containing the O content of 0.08-0.3 wt.%, the N content of 0.01-0.1 wt.%, and the Fe content of 0.06-5.0 wt.%, inside the first titanium material, and a step of melting the consumable electrode obtained in the above step, by vacuum arc.;COPYRIGHT: (C)2003,JPO