GOLD-BASED ALLOY, HARDENED WITH INTERMETALLIDES CONTAINING NICKEL, (VERSIONS) Russian patent published in 2016 - IPC C22C5/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of noble metals and alloys, particularly to alloys based on gold, and can be used in electronics, aerospace engineering, jewellery production. According to one version, alloy contains, wt%: gold - 50-95, nickel - 3-5, silicon - 0.5-2, boron - 0.01-1.0, copper - balance, at total content of nickel and silicon not more than 5 %, wherein after thermal or thermo-mechanical processing alloy has a structure, hardened with an intermetallide Ni₂Si. According to a second version alloy contains, wt%: gold - 50-85, cobalt - 11-13.5, aluminium - 1.5-4, boron - 0.01-1.0, copper - balance, at total content of nickel and aluminium, not exceeding 15 %, wherein after thermal or thermo-mechanical processing alloy has a structure hardened with intermetallides Ni₃Al, NiAl, Νi₂Αl₃.

EFFECT: technical result is improved strength properties, especially hardness, while maintaining level of casting properties and ductility.

4 cl, 2 ex