| 摘要 |
PURPOSE:To join very well a sintered metallic body and a refined metallic body together by filling the pores in the part of the sintered metallic body contacting with the refined metallic body with a molten metal for the refined metallic body under pressure by molten metal forging. CONSTITUTION:A sintered metallic body 8 of pig iron is preheated to about 250 deg.C and set in the cavity 4 of a molten metal forging machine, and a molten metal 9 such as a molten Al alloy in a cylinder 5 is forged with a plunger tip 6 by the action of a cylinder 7 for driving. After solidifying the molten metal 9, a composite metallic body 11 having the shape of a rocker arm is taken out. The body 11 is a sintered metallic body 8 coated with a refined metallic body 11 of said Al alloy by casting. |
