| 摘要 |
PROBLEM TO BE SOLVED: To obtain a lightweight blank excellent in durability of cutting well by compacting and sintering a composition prepared by mixing specific proportions of Ti powder of specific grain size, aluminum-vanadium alloy powder consisting of aluminum and vanadium in a specific ratio and having specific grain size and vanadium carbide powder of specific grain size. SOLUTION: This material is a sintered compact composed of a composition prepared by mixing, based on 100 pts.wt. of the total amount, about 80 pts. of titanium powder of 100 to 150μm grain size, about 5 to 8 pts. of aluminum- vanadium alloy powder of <=20μm grain size having an aluminum/vanadium ratio of 6/4 by weight and about 8 to 15 pts. of vanadium carbide powder of <=3μm grain size. In order or know the toughness of a blade material, an inspection sample 1 is supported by round bars 3 placed on a fixed plate 2 and the central part of the inspection sample is pressed by means of a round bar 4 having the size identical with the round bars 3 to measure the pressing force at the time of breakage of the inspection sample. Sintering is performed at 1200 to 1300 deg.C for 2 hr in a vacuum furnace or an argon gas furnace. If necessary, aging treatment is carried out at 400 deg.C for 40 hr or at 500 deg.C for 3 hr.
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