| 摘要 |
PURPOSE:To form the worked product having good surface condition by forming a composite billet with dispersing a reinforcing fiber in a metallic matrix and by performing an extrusion work with coating the surface of this composite billet with a metal. CONSTITUTION:Al pipe 8 is arranged on the pipe holding part 6n of the cavity 6 of the inside of the metal die 4 consisting of divided metal dies 4a, 4b and a SiC whisker 9 is put into the cavity 6. A preform is then formed by pressurizing the whisker 9 with the punch 7 for pressurizing and by filling it into a pipe 8. This preform is taken off and arranged to the inside of the cavity 14 of the divided metal die 13 and the die 13 and preform are preheated with electrifying a heater 12. A composite billet 1 is obtd. then by pouring the Al molten metal melted with heating and by pressurizing and solidifying with a plunger 15. The work product of good surface shape is obtd. by performing the extrusion work of this composite billet 1 with dies.
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