| 摘要 |
PURPOSE:To obtain a product having a desired shape and size at a low cost, by casting molten metal and carbide particles having the specific gravity larger than the specific gravity of the molten metal into a hollow cylindrical casting mold while rotating said mold and making the composite phase of the composite phase with the formed metallic phase into a product. CONSTITUTION:A casting mold 1 consisting of a product forming part 1.1 and a riser forming part 1.2 is rotated on a horizontal rotary table 4, and the casting port 61 of a hopper 6 is placed to face to the opening end in the upper part thereof. Carbide powder P is charged from a charging jig 8 into the hopper 6 and molten metal M' is charged therein from a ladle 10, respectively through the port 61. Since the powder P has the specific gravity larger than the specific gravity of the molten metal M', the powder flocculates in a product forming part 1.1, thus forming a composite phase with the metal M'. Only the metallic phase is formed in a riser forming part 1.1. The metal M' is removed from the mold 1 upon thorough solidification and the composite phase and the metallic phase are cut along a line V to remove the metallic phase part B, whereby a hollow cylindrical casting A is obtd. |
