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 industry, jewellery production. According to one version, alloy contains, wt%: gold - 50-95, cobalt - 3-5, silicon - 0.5-2, copper - up to 40, boron - 0.01-1.0, wherein total content of cobalt and silicon is not more than 5 %, wherein after thermal or thermo-mechanical processing alloy has a structure hardened with an intermetallide Co2Si. According to a second version alloy contains, wt%: gold - 50-85, cobalt - 11-13.5, aluminium - 1.5-4, copper - up to 40, boron - 0.01-1.0, at total content of cobalt and aluminium not exceeding 15 %, wherein after thermal or thermo-mechanical processing alloy has a structure, hardened with intermetallides Co3Al, CoAl, Co2Al3.
EFFECT: technical result is improved strength properties, especially hardness, while maintaining level of casting properties and ductility.
4 cl, 2 ex
