FIELD: metallurgy.
SUBSTANCE: metal powder is loaded in the matrix. Loaded powder is compacted and central hole is created in the compacted loaded powder by HV discharge under vacuum with residual pressure 6-10 Pa. Then cleaning of surface of received porous pipe blank is performed by heating by series of LV DC pulses at voltage 5-15 V with total duration 120 s maximum, with separate pulse width 3·10-3 s max and amplitude 1-10 kA/cm2.
EFFECT: increased strength and plasticity of porous pipe blank.
1 dwg
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