GOLD-BASED ALLOY, HARDENED WITH INTERMETALLIDES CONTAINING IRON, (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, iron - 3-5, silicon - 0.5-2, boron - 0.01-1.0, at least one element selected from a group containing copper, palladium, silver, platinum in total up to 40, at total content of cobalt and silicon not more than 5 %, wherein after thermal or thermo-mechanical processing alloy has a structure hardened with intermetallide Fe₂Si. According to a second version alloy contains, wt%: gold - 50-85, iron - 11-13.5, aluminium - 1.5-4, boron - 0.01-1.0, at least one element selected from a group comprising copper, palladium, silver, platinum in total up to 40, at total content of iron and aluminium, not exceeding 15 %, wherein after thermal or thermo-mechanical processing alloy has a structure hardened with intermetallides Fe₃Al, FeAl, Fe₂Al₃.

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

4 cl, 2 ex