Abstract:97W-2Ni-1Fe heavy alloy feedstocks with different powder loadings were prepared for injection molding. The rheological behavior of these feedstocks was studied. The mechanical properties of assintered parts and the shrinkage during sintering were measured. The results showed that the rheological behavior of these feedstocks could be described as pseudoplastic fluid. The mechanical properties of the injection molded alloy are superior to those of alloy prepared by conventional press/sinter process. There is an optimal powder loading 47%(volume fraction) with the best mechanical properties. The shrinkage during sintering is isotropical and the tolerances of products are small.

Key words: injection molding　heavy alloy　powder loading