A method of obtaining a porous metal body of aluminum alloy

摘要

FIELD: metallurgy.SUBSTANCE: invention relates to a method of producing a porous metal body of aluminium alloy, comprising the progressive melting of the plate from an aluminium alloy by the heat source, using hydrogen as a blowing gas, and gradual solidification of the metal. Gradual melting of the plate of aluminium alloy is carried out by local action on its surface in the form of a movable arcing AC source of heat at a speed above the plate arc 0.1-10 mm/s, a voltage of 20-40 V, a current of 20-500 A. The pore-forming gas is fed into the local area of impact of the arc on the surface of the wafer in a mixture with inert gas as argon. The flow rate of argon is ≥5 l/min, the partial pressure of the pore-forming gas in the range of 20 Pa-2.0 MPa, and the partial pressure of the shielding gas is 202 kPa-2.0 MPa.EFFECT: obtaining a metal body made of aluminium alloy with variable porosity.1 ex