FIELD: powder metallurgy, namely processes for making low-porosity articles, possibly manufacture of hot deformed pistons of powder material on base of aluminum.
SUBSTANCE: process comprises steps of making porous blank with variable height of its end cross section with use of shaped chamfered lower punch; subjecting blank to heating and hot forming.
EFFECT: enhanced quality of articles.
1 dwg, 1 ex
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SU1174160A1 |
