FIELD: powder metallurgy, namely processes for making built-up complex-profile sintered articles, possibly working organs of submerged centrifugal pumps.
SUBSTANCE: method for making built-up sintered article with variable profile of cross section comprises steps of pressing different parts of article blank; forming at least on one surface of thin-wall portion of blank at least one technological member for equalizing density of powder material in volume of thin-wall portion at pressing process; assembling blank; placing impregnation briquette of easy-to-melt material on surface of blank; sintering blank and simultaneously performing diffusion welding of its parts and infiltration of easy-to-melt material.
EFFECT: enhanced mechanical properties and geometry size of article.
3 cl, 3 dwg
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