Gold alloy including hardness improving elements

Abstract

The present disclosure provides for a gold alloy composition that has a greater hardness than conventional gold alloys of the same composition. The gold alloy composition includes 96.4-97% gold by weight. The composition also includes elements improving hardness and golden yellow color in the proportion of 3-3.6% by weight, which are one or more elements among: silver, copper, zinc, nickel, cobalt, gallium, tin, antimony, and iron. The composition also includes elements improving the flowing of melted gold alloy and surface smoothness, which are one or more elements among: iridium, palladium, aluminum, indium, silicon, germanium and lead. An example procedure is also provided to increase the hardness of gold alloys.

1 . A gold alloy composition with hardness improving elements comprising:
 gold (Au), wherein gold is 96.4-97% by weight of the composition;   one or more hardness improving elements selected from the group including: copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), gallium (Ga), tin (Sn), antimony (Sb) and iron (Fe), wherein the one or more hardness improving elements is between 0.1-3.6% by weight of the composition;   one or more flow improving elements selected from the group including: iridium (Ir), palladium (Pd), aluminum (Al), indium (In), silicon (Si), germanium (Ge) and lead (Pb), wherein the one or more flow improving elements is between 0.0-0.1% by weight of the composition; and   silver (Ag), wherein the silver (Ag) is a percentage by weight of the composition that refines the proportion of all components to 100%.   
     
     
         2 . The gold alloy composition of  claim 1 , wherein the one or more hardness improving elements selected from a group consisting of copper (Cu) or zinc (Zn) or both, and wherein the copper (Cu), zinc (Zn), or both is between 0.5-3.6% by weight of the composition. 
     
     
         3 . The gold alloy composition of  claim 1 , wherein the gold is 96.5% of the composition by weight. 
     
     
         4 . The gold alloy composition of  claim 1 , wherein the one or more hardness improving elements is 0.5-2.1% by weight of the composition. 
     
     
         5 . The gold alloy composition of  claim 1 , wherein the silver (Ag) is between 1.4-3% by weight of the composition. 
     
     
         6 . The gold alloy composition of  claim 1 , wherein gold (Au) is 96.5%, the one or more hardness improving elements is between 0.5-2.1%, and the silver (Ag) is between 1.4-3% by weight of the composition, respectively.