PURPOSE: To efficiently produce an Al alloy composite having excellent heat resistance and specific strength, etc., at a low cost by adding a carbide-forming metal and solid carbon source in molten Al, reacting at a specific high temp. while mechanically stirring and uniformly dispersing the carbide.
CONSTITUTION: In the molten Al or Al alloy, the carbide-forming metal element (B, Si, Ti, etc., desirably about 5-40wt.%) and the solid carbon source (graphite, coal, etc., desirably about 1-20wt.%) are added. Successively, while stirring the molten metal by mechanical stirring or electromagnetic stirring, the molten metal is heated at 1100-1500°C and reacted, and the carbide is generated and dispersed and cast. Then, the carbon and the carbide-forming metal element in the molten metal are added so as to satisfy the expression and a jig in contact with the molten metal uses the one containing no carbide-forming metal element and carbon. By this method, the Al or Al alloy composite having light wt. and the specific Young's modulus, wear resistance, etc., is obtd.
IWAMURA HIROSHI
NOMURA MASAHIRO
