| 摘要 |
PURPOSE:To cast centrifugally an abrasion-resistant casting having a layer mingled with hard particles of a uniform layer thickness, by forming a fused flux layer on the top surface of the molten metal in a rotary casting mold, and dispersing and charging the hard particles uniformly on said flux layer along the axial direction of the casting mold. CONSTITUTION:A fused flux layer F is formed on the surface of the molten metal layer M' of a centrifugal casting mold 1 so as to cover the entire surface of the molten metal. Hard particles P are then charged through the layer F to the molten metal M'. Then, the particles P dispersed and charged from above the layer F are once adsorbed in the layer F then contact the metal M' and are adsorbed in the molten metal, whereafter the particles settle in the molten metal toward the outside circumference. Since the layer F covers the entire surface of the molten metal, they do not largely move on the surface of the molten metal in the axial direction thereof. Thus, the particles P are prevented from moving to both end parts of the mold 1 and if the particles are dispersed and charged uniformly along the axial direction, the layer mingled with the particles of a uniform layer thickness is formed over the entire length and circumference of the casting. |
