Patent ID: 7442225

Claim:
A worked molybdenum-alloy material having high strength and high toughness, comprising: molybdenum matrix containing a nitride forming element dissolved therein forming a solid solution; at least one of carbide particles, oxide particles, and boride particles precipitated and dispersed in said molybdenum matrix; and fine nitride particles dispersed in said molybdenum matrix, wherein said nitride particles are dispersed by internally nitriding a worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved forming a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed, and wherein a worked crystal-grain structure or a recovered crystal-grain structure is maintained in both surface region and inner region of the worked molybdenum-alloy material, and the worked molybdenum-alloy material has a recrystallization temperature of 1800° C. or higher.