| 摘要 |
PROBLEM TO BE SOLVED: To provide an Mo-alloy work material which can be used at temperature higher at least than those in the case of conventional TZM alloys and also to provide its manufacturing method. SOLUTION: In the high-strength and high-toughness Mo-alloy work material, an Mo-alloy work material into which nitride-forming metallic elements are dissolved to form a solid solution in an Mo matrix phase and also at least one kind among carbide particles, oxide particles and boride particles is dispersedly precipitated is internally nitrided and, in addition to the at least one kind among the carbide particles, oxide particles and boride particles, fine nitride particles are dispersed. The alloy work material in which Mo is used as a matrix phase and at least one kind among carbide particles, oxide particles and boride particles is dispersedly precipitated and also at least one element among Ti, Zr, Hf, V, Nb and Ta is dissolved to form a solid solution is subjected to multi-step internal nitriding treatment where treating temperature is raised stepwise to manufacture the objective Mo-alloy work material. COPYRIGHT: (C)2004,JPO
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