CAST COMPOSITE ALLOY AND METHOD OF ITS PRODUCTION Russian patent published in 2013 - IPC C22C32/00 C22C1/10 C22C21/00 

FIELD: metallurgy.

SUBSTANCE: proposed alloy comprises inclusions of intermetallide phases Al₃X, AlX, AlX₃, where X is Ti, Zr, V, Fe, Ni sized to <10 mcm in amount of 5-20 vol. %, high-strength endogenous ceramic nano-sized particles of TiB₂, TiC, Al₂O₃ sized to <50 nm obtained in adding them to the melt in amount of 0.1-2.0% of its weight and reinforcing discrete ceramic particles with average size of 14 mcm obtained in adding them to the melt in amount of 1-5% of its weight. Proposed method comprises mixing the powders of initial components to form in interaction one with another and with matrix aluminium melt the endogenous intermetallide and ceramic nano-sized particles and process additives represented by cryolite Na₃AlF₆ in amount of 0.1-0.2% and aluminium powder in amount of up to 30% of mix weight, pelletising the obtained composite mix, heating the pellets to 300±10°C, introducing them in matrix melt at 850-900°C and holding the melt before filling for 15-20 min.

EFFECT: improved tribological behavior at higher temperatures.

3 cl, 2 tbl