PRODUCTION OF HIGH-TEMPERATURE NICKEL-BASED COMPOSITE Russian patent published in 2015 - IPC B22F3/20 B22F3/18 C22C19/05 C22C1/04 C22C32/00 

FIELD: metallurgy.

SUBSTANCE: proposed process comprises mixing of powders for preparation of material matrix and disperse powder of metal oxide, mechanical alloying of produced mix, compacting and tolling of obtained alloy. Powders are mixed to get the mix containing the metal oxide with its volume content of 1-3.5%, 7.5-8.5 wt % of aluminium, 4-5 wt % of chromium, 2-2.5 wt % of tungsten, 2.5-3.5 wt % of cobalt, 0.8-1.5 wt % of titanium, Ni making the rest. Mechanical alloying is performed in high-power plant for grinding and mixing in protective atmosphere for 40-60 hours. Compaction is performed by hot extrusion at 1100-1250°C and drawing factor of 11-16. Produced alloy shaped to extruded bars is rolled in direction of extrusion at 950-1150°C and deformation factor of 15-20% in a pass.

EFFECT: nickel matrix-based composite reinforced by aluminium oxide with tensile strength at the room temperature of 900 MPa.

4 cl, 3 ex