| 摘要 |
PURPOSE:To produce a casting free from blowholes, etc. having high quality in the stage of casting molten metal in a die under pressure by applying specific oscillation thereto. CONSTITUTION:A steel material 1 is placed in a die 6 and a flux is scattered on the surface thereof in the case of melt sticking a copper alloy 2 on the surface of a steel material 1. The die is put in a furnace to preheat the entire part thereof, whereafter the die is placed on an oscilation base 8. A molten copper alloy 2 is charged into the die which is kept oscillated by the same in a prescribed direction. When the molten metal 2 begins to slidify and enters a solid- liquid coexistence region, a plunger 7 is brought down to pressurize the metal 2 until the metal is thoroughly solidified. The molten metal is stirred by the oscillation and is pressurized in the solid-liquid coexistence state, the gas, foam, etc. in the molten metal are released, and the metallic material wherein the copper alloy 2 free from blowholes and pinholes is securely melt stuck to the material 1 is obtd. |
