PURPOSE: To easily produce the dispersion strengthened metallic composite material having good quality by dividing the target component compsn. of an alloy for dispersion medium by the temp. width between a solidus line-liquidus line, adding and mixing a dispersion strengthening material to and with a slurry of the broader component compsn. and incorporating the slurry into the molten metal under stirring of the remaining component compsn.
CONSTITUTION: The component compsn. (for example, Cu-1mass% Sn alloy) of the broader temp. width between the solidus line-liquidus line than the target component compsn. of the dispersion medium is prepd. as the slurry of the liquid-solid mixed phases. While this slurry is kept stirred, the dispersion strengthening material (for example, Al2O3 particles) is added and mixed to and with the slurry to form the precomposite material. The precomposite material is incorporated into the molten metal (for example, pure copper) prepd. to the remaining component compsn. under stirring to uniformly disperse the dispersion strengthening material, by which the composite material (for example, consisting of Cu-0.19mass% Sn alloy and the Al2O3 particles) is prepd. As a result, the dispersion strengthened metallic composite material (for example, high-strength conductive material) having the good quality is obtd.
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