| 摘要 |
PURPOSE:To improve remarkably the cooling effect for molten steel by a roll made of a copper metal for ultraquick cooling used in the stage of producing an amorphous light-gauge steel strip by ultraquick cooling of the molten steel by forming a thin Fe or Fe alloy layer on the surface of said roll. CONSTITUTION:A water cooling roll made of Cu or a Cu alloy having excellent thermal conductivity is rotated at a high speed and molten steel is ejected to the surface thereof and is ultraquickly cooled with the roll, whereby an amorphous light-gauge steel strip is continuously produced. The Cu or Cu alloy of the roll for cooling and the molten steel have poor wettability to induce the low thermal conductivity and the poor cooling effect. A Fe metallic layer 2 having good wettability to molten steel such as Fe or Fe-Ni is formed by plating, melt spraying, vapor deposition, etc. on the surface of the Cu or Cu alloy 1 of the water cooling roll in order to improve the above-mentioned defects. Otherwise, an intermediate layer 3 of Ni or an Ni alloy is interposed between the roll 1 and the layer 2 to improve the adhesion between the layer 2 and the roll 1. The wettability between the molten steel and the roll is improved and the cooling effect by the roll is improved. |
