| 摘要 |
PROBLEM TO BE SOLVED: To melt high melting point metal, such as Ti, V, Cr, Zr, Nb, Mo, Ta, in a unit of tens of grams and in small heat-loss in a state of substantially preventing contamination and to immediately cast the molten metal. SOLUTION: A semi-floated melting while keeping the shape of the molten metal to almost spherical body is performed by supplying electric power into a high frequency induction coil having a cylindrical shape or a cylindrical shape with conical upper opening part and melting the metal in a space inside the coil while supporting the bottom part of the molten metal with the upper end surface of a water-cooled metal bar. After melting, the magnetic field is cut off by pushing up a metal-made mold from the lower side and laying the mold in the inner part of the high frequency induction coil to extinguish the floating force of the molten metal, and the molten metal which has lost the spherical shape is made to flow into the mold and cast therein. COPYRIGHT: (C)2004,JPO
|
