METHOD OF PRODUCING SINTERED POROUS ARTICLES FROM TUNGSTEN-BASE PSEUDOALLOY Russian patent published in 2012 - IPC B22F3/12 C22C1/08 C22C27/04 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to methods of producing porous articles from composite tungsten-based pseudoalloy. Proposed method may be used for making corrosion-proof materials that can efficiently dissipate mechanical power at dynamic loads and increase density on collision with obstacle. Pore-forming agent NaBr with particle fineness under 0.071 mm is added to charge containing 94-98 wt % of tungsten, nickel and iron making the rest in 7:3 ratio.Tungsten powder features Fischer mean particle size of 3.9 mcm. Aforesaid charge is compacted at not over 150 MPa and sintered at 1300-1320°C for 0.5-1.0 h in atmosphere of hydrogen.

EFFECT: porosity of 50-60%, high compression resistance, uniform fine structure.

2 dwg