MANUFACTURE OF TITANIUM ALLOY IN HIGH EFFICIENCY BY MECHANICAL ALLOYING

摘要

PROBLEM TO BE SOLVED: To provide a technique of manufacturing an alloy powder composed essentially of titanium by a mechanical alloying method in high efficiency and also to provide a solidification and forming technique causing no deterioration in the functional property of the alloy. SOLUTION: In the method for synthesizing an alloy powder containing >=50 atomic % titanium, a magnesium powder in an amount of <=5 wt.% is added to the powder of metals or nonmetals constituting an alloy and then the resultant powder mixture is subjected to mechanical alloying treatment. A dense green body is obtained by compacting the above powder in a reduced- pressure atmosphere under pressurization to remove magnesium. Further, the green compact is heat treated at a temperature not higher than the melting point in an inert gas or reduced-pressure atmosphere.