A kind of white gold alloy used for high temperature enamel jewelry and preparation method thereof
A white gold alloy and enamel technology, applied in the field of white gold alloy and its preparation, can solve problems such as uneven distribution of internal stress, influence on enamel color, influence on cold working performance, etc., and achieve excellent anti-sulfur discoloration performance and excellent high-temperature oxidation resistance. , the effect of excellent cold workability
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[0039] The preparation method of the above-mentioned white gold alloy for high-temperature enamel jewellery, the steps are:
[0040] 1) Melting the raw materials under a protective atmosphere;
[0041] 2) After all the materials are melted, adjust the temperature of the molten metal and cast to obtain ingots;
[0042] 3) After the ingot is rolled, it is annealed.
[0043] Preferably, step 1) is: under the protection of commercially pure argon, the raw materials are melted in an induction furnace at a melting temperature of 1030-1050°C;
[0044] Preferably, in step 2), adjust the temperature of the molten metal to 1020-1040°C;
[0045] Preferably, in step 3), the annealing treatment is: annealing at 700-800° C. for 3-10 minutes.
Embodiment 1
[0048] The white gold alloy used for firing high-temperature enamel of the present embodiment is composed of the following components by mass percentage:
[0049] 75.30wt% gold, 9.97wt% copper, 7.50wt% nickel, 3.63wt% silver, 3.15wt% zinc, 0.40wt% palladium, 0.015wt% silicon, 0.015wt% scandium, and other unavoidable impurities.
[0050] The preparation method of the present embodiment, the steps are:
[0051]Smelting is carried out in a vacuum induction furnace, and the mass percentages of the raw materials are: 1.5wt% silver-scandium alloy, 1.0wt% silver-palladium alloy, 0.2wt% copper-silver alloy, 1.0wt% silver-zinc alloy, 0.5wt% copper-silicon Alloy, 0.8wt% pure silver, 12.5wt% copper-nickel alloy, 7.2wt% copper-zinc alloy, 75.3wt% pure gold. Put the above materials into the graphite crucible one by one, fill it tightly and close the furnace cover, evacuate to 5.0Pa, and fill it with industrial pure argon to 1.0atm. Start induction heating for smelting, and the smelting t...
Embodiment 2
[0059] The white gold alloy used for firing high-temperature enamel of the present embodiment is composed of the following components by mass percentage:
[0060] 75.10wt% gold, 9.87wt% copper, 7.32wt% nickel, 3.53wt% silver, 3.31wt% zinc, 0.80wt% palladium, 0.030wt% silicon, 0.008wt% scandium, and other unavoidable impurities.
[0061] The preparation method of the present embodiment, the steps are:
[0062] Smelting in a vacuum induction furnace, the mass percentages of the raw materials are: 0.8wt% silver-scandium alloy, 2.0wt% silver-palladium alloy, 1.0wt% copper-silicon alloy, 2.2wt% silver-zinc alloy, 6.7wt% copper-zinc Alloy, 12.2wt% copper-nickel alloy, 75.1wt% pure gold. Put the above materials into the graphite crucible one by one, fill it tightly and close the furnace cover, evacuate to 4.8Pa, and fill it with industrial pure argon to 1atm. Start induction heating for smelting, and the smelting temperature is 1040-1050°C. After the charge is completely melted, t...
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