TITANIUM CARBIDE DISPERSION-STRENGTHENED ALUMINUM-BASE POWDER, ITS PRODUCTION AND TITANIUM CARBIDE DISPERSION-STRENGTHENED ALUMINUM-BASE COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a titanium carbide dispersion-strengthened aluminum-base powder without using the conventional soln. strengthening mechanism for which the application of solid solubility limit, compaction and hot working and the applied powder grain size are limited but by the dispersion strengthening as a quite different strengthening mechanism and its production method and a titanium carbide dispersion-strengthened aluminum-base composite material. ;SOLUTION: This titanium carbide dispersion-strengthened aluminum-base powder consists of the granular body as the composite material in which the titanium carbide gains having ≤0.5μm diameter are uniformly dispersed in the matrix of aluminum or aluminum alloy. The powder is produced by impregnating the pellet obtained by compacting the mixed powder of titanium, graphite and aluminum with a molten aluminum alloy, heat-treating the impregnated powder at 1000-1800°C to deposit the titanium carbide grains having ≤0.5μm diameter, adding the pellet contg. the titanium carbide grains to the molten aluminum and then atomizing the melt.;COPYRIGHT: (C)1998,JPO