Patent ID: 6187119
Filing Date: 2001-02-13
Classification: C22C

Abstract:
A process for the production of an alloy based on gold, the titer of gold being between 9 and 22 karats, which comprises steps of: providing the gold based alloy consisting essentially of silver, copper, titanium, zinc, and balance gold and inevitable impurities and free of cobalt and nickel; fusing the gold based alloy in three phases: in the first phase, subjecting the copper and titanium to fusion thereby forming a first fused metallic product, the amount of titanium being 0.1-1 wt. %; in the second phase, the metallic product obtained in the first phase is fused with silver, copper, and zinc, except gold to obtain prelega; and in the third phase, the metallic product obtained in the second phase, the prelega, is fused with gold.