Cone-shaped part prepared by pure Al powder sintered material processed by HPT was studied by compressible rigid plastic FEM, the distribution and the variational trend of strain and density in HPT process were analyzed; The specimen was deformed by HPT equipment and die, microstructure, microhardness and density of different points in undeformed and deformed specimens had been examined. The results show that HPT process is a useful tool for reducing the porosity in specimen, the relative density of specimen is above 0.996 in FEM, while it reaches to 0.98 in the experiment; the strain-effective of different points in specimen are different, it reaches to the highest in the edge of specimen, about 4.5, microhardness reaches to 61.12HV0.1/10 in the edge of specimen, it is also the highest.
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2010, Vol. 21 
