US2015354029A1PendingUtilityA1

Master alloy composition for producing gold alloys and gold alloy

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Assignee: LEGOR GROUP S P APriority: Jan 11, 2013Filed: Jan 9, 2014Published: Dec 10, 2015
Est. expiryJan 11, 2033(~6.4 yrs left)· nominal 20-yr term from priority
Inventors:Massimo PolieroAndrea Basso
C22C 1/03C22C 5/02C22C 1/00C22C 9/00C22C 9/04C22C 5/08C22C 9/05C22C 1/02C22C 5/04
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Claims

Abstract

A master alloy composition for producing gold alloys with innovative refiners system comprising iridium (Ir): 0.01÷0.8% by weight, ruthenium (Ru): 0.002÷0.9% by weight, rhodium (Rh): 0.002÷0.8% by weight, and copper (Cu): 20÷99.965% by weight, wherein iridium (Ir), ruthenium (Ru) and rhodium (Rh) are the grain refiners.

Claims

exact text as granted — not AI-modified
1 . Master alloy composition for producing gold alloys with innovative refiners system comprising:
 iridium (Ir): 0.01 to 0.8% by weight;   ruthenium (Ru): 0.002 to 0.9% by weight;   rhodium (Rh): 0.002 to 0.8% by weight;   copper (Cu): 20 to 99.965% by weight.   
     
     
         2 . Master alloy composition according to  claim 1 , wherein the iridium (Ir) weight percentage is in the range between 0.03% and 0.17%. 
     
     
         3 . Master alloy composition according to  claim 2 , wherein the iridium (Ir) weight percentage is in the range between 0.03% and 0.06% for yellow gold alloys and in the range between 0.1% and 0.16% for white gold alloys. 
     
     
         4 . Master alloy composition according to  claim 1 , wherein the ruthenium (Ru) weight percentage is in the range between 0.03% and 0.09%. 
     
     
         5 . Master alloy composition according to  claim 4 , wherein ruthenium (Ru) weight percentage is in the range between 0.0045% and 0.04% for yellow gold alloys and in the range between 0.01% and 0.08% for white gold alloys. 
     
     
         6 . Master alloy composition according to  claim 1 , wherein the rhodium (Rh) weight percentage is in the range between 0.05% and 0.15%. 
     
     
         7 . Master alloy composition according to  claim 1 , further comprising zinc (Zn) wherein the zinc(Zn) weight percentage is in the range between 1 and 25%. 
     
     
         8 . Master alloy composition according to  claim 7 , wherein the zinc (Zn) weight percentage is in the range between 1% and 18%. 
     
     
         9 . Master alloy composition according to  claim 8 , wherein the zinc (Zn) weight percentage is in the range between 1% and 12% for yellow gold and in the range between 7% and 14% white gold alloys. 
     
     
         10 . Master alloy composition according to  claim 1 , further comprising silver (Ag) wherein the silver (Ag) weight percentage is in the range between 20 and 64%. 
     
     
         11 . Master alloy composition according to  claim 1 , further comprising nickel (Ni) wherein the nickel weight percentage is in the range between 5 and 40%. 
     
     
         12 . Gold alloy with innovative refiners system comprising:
 gold (Au): 333.33‰ (8 k) to 958.33‰ (23 k) by weight;   master alloy composition according to  claim 1 , for the remaining part by weight.   
     
     
         13 - 14 . (canceled) 
     
     
         15 . A method of making a gold alloy which comprises adding an amount of a master alloy composition of  claim 1  to gold to form a gold alloy having 333.33‰ (8 k) to 958.33‰ (23 k) by weight of gold.

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