| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a titanium alloy article capable of achieving a combination of high strength and high toughness or elongation. A method of producing a titanium alloy article in the form of a wire or powder for use in laminated casting, in which Al is about 4.0-5.5 by weight and Sn is 0-about 1.0. , V of about 2.5-3.5, Mo of about 1.0-2.0, Cr of about 1.0-2.0, oxygen of about 0.35 or less, Fe of about 0.55 or less, A step of forming a melt containing other accidental elements and impurities of about 0.2 or less, and the remaining Ti, a step of casting a cast alloy casting from the melt, and optionally forming a wire from the ingot, Subsequently, the step of voluntarily forming powder from the wire, the step of quenching the as-cast alloy casting above the β-phase transformation temperature, and the step of annealing the tempered cast alloy casting from 0.03 ° C. A method comprising cooling from the β-transformation temperature or above the β-transformation temperature between 10 ° C./sec. [Selection diagram] FIG. 16 |