Differences in the mode of thermomechanical processing between white gold alloys to produce semi-finished products
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The results of the investigation of the reduction degree on the hardness of a gold sample with chemical composition Au58,5Ag15Cu9,5Ni9Zn5Pd3 for old white gold alloy and Au58,5Ag18Cu10,5Ga8Zn5 (wt %) for new white gold alloy, are shown. The obtained results show that hardness of samples is higher when total reduction is higher, and that it decreases after process annealing. Also, the mechanical properties of the investigated alloys were compared. Alloy without Ni has lower hardness and higher elongation values.
Ključne reči:white gold / rolling / drawing / hardness / total elongation / nickel / gallium
Izvor:Bulgarian Chemical Communications, 2015, 47, 1, 161-166
- Bulgarian Acad Science, Sofia