| 摘要 |
A "hard metal" insert (e.g. sintered carbide) is cast-in to a metal body by enclosing the insert in a thin coating of metal. The coated insert is mounted on a wax pattern, invested with a refractory, which is fired (e.g. at 650 DEG C - 750 DEG C), and then the metal body is cast about the insert. The metal coating of the insert is fugitive during casting. |
