ALLOY BASED ON PALLADIUM AND METHOD FOR STRENGTHENING PALLADIUM ALLOYS USED FOR MANUFACTURE OF PIECES OF JEWELLERY Russian patent published in 2015 - IPC C22C5/04 C22F1/14 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of precious metals and alloys used for manufacture of pieces of jewellery. Palladium-based alloy contains the following, wt %: palladium 50-95, nickel 3-5, silicone 0.5-2, copper 1-40, gold 1-30, indium 1-10, gallium 1-10, boron 0.01-1,0, at the total content of nickel and silicone of up to 5% in a stoichiometric ratio determining formation of Ni₂Si intermetallide, or the alloy contains the following, wt %: palladium 50-85, nickel 11-13.5, aluminium 1.5-4, copper 1-40, gold 1-30, indium 1-10, gallium 1-10, boron 0.01-1,0, at the total content of nickel and aluminium of up to 15% in a stoichiometric ratio corresponding to Ni₃Al, NiAl, and Ni₂Al₃ intermetallides. A method for obtaining alloys on the basis of palladium involves melting of alloys of the specified compositions and their heat treatment involving heating and exposure at temperature of formation of an oversaturated solid solution, tempering to the temperature of less than 100°C, ageing at the temperature of 300 to 800°C during 5 minutes to 24 hours and further cooling.

EFFECT: improvement of strength properties of a palladium alloy.

5 cl