PRODUCTION OF SECOND PHASE PARTICLE DISPERSION TYPE ULTRAQUICKLY COOLED ALLOY

摘要

PURPOSE:To produce a 2nd phase particle dispersion type ultraquickly cooled alloy having excellent functions and properties over a wide range by injecting and dispersing the 2nd phase particles to an alloy base material which is melted by heating to about the temp. at which the 2nd phase particles do not melt then solidifying the molten alloy by ultraquick cooling. CONSTITUTION:An ingot of an alloy base material 2 is put into a heat resistant tube 1 having a small-sized aperture in the bottom end thereof. The ingot is melted by heating to about the temp. at which the 2nd phase particles 7 do not melt by a vacuum high frequency melting furnace 4 provided on the outside circumference and is pressurized by a piston 5 via an inert gas 9 such as Ar sealed into the tube 1 so that the molten alloy is ejected to the joint part between a pair of rolls 6, 6 under high speed rotation through the above-mentioned aperture. The particles 7 are forcibly injected and added to the gushing flow of the material 2 by using a powder feeder 8 for plasma spraying. The molten alloy base material 2 added with the 2nd phase particles 7 is elongated by rolls 6, 6 and is at the same time ultraquickly cooled and solidified. A ribbon 10a consisting of the 2nd phase particle dispersion type ultraquickly cooled alloy formed by dispersing three-dimensionally and uniformly the particles 7 in the ultraquickly cooled alloy matrix consisting of amorphous, crystalline or mixed phases thereof is thus obtd.