ZrおよびCを微量添加した電子ビーム溶解Moの機械的性質

概要

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Electron beam was applied to the industrial production of melted molybdenum doped with carbon and zirconium. The effect of zirconium doping was investigated down to the dilute amount of from 50 to 60ppm. The addition of zirconium in amount of the said ppm could raise the recrystallization temperature by 200°C while keeping the ductility good. The characteristics of this molybdenum, melted by 300kW electron beam furnace, was compared with those of powder metallurgy molybdenum in 1mm, 5mm and 12mm thick plate. Superiority of electron beam molybdenum doped with zirconium to powder metallurgy molybdenum was shown more clearly in thicker plates.High temperature structural material should have good mechanical properties even in large sections as well as good weldability. The weldability of this electron beam melted molybdenum was reported in another paper. In these respects the electron beam melted molybdenum is expected to be utilized in high temperature technologies.
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