Silver alloy with resistance to hydrogen sulfide corrosion discoloration and red appearance and machining process thereof

Abstract

The invention discloses a silver alloy with resistance to hydrogen sulfide corrosion discoloration and red appearance and a machining process thereof. The silver alloy is prepared from the following components in percentage by weight: 0.1-0.2wt% of B, 0.6-0.8wt% of Sc, 1.2-1.4wt% of Ti, 0.2-0.4wt% of V, 12.0-15.0wt% of In, 0.8-1.2wt% of Ta, 30.0-32.0wt% of Cu and the balance of silver. Through thesilver alloy, a solution of material science is provided for the silver alloy applied to jewelries in China and provided with red appearance; the silver alloy has excellent resistance to hydrogen sulfide corrosion blackening; implementation and industrialization of the silver alloy can effectively solve the current situation that product types in the field of colored silver are restricted and insufficient; the silver alloy will certainly achieve fruitful economic result and social benefit in the future.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a silver alloy. Background technique [0002] Human beings have discovered and utilized silver and silver alloys for thousands of years, and the oldest silver jewelry with a history of more than 5,000 years was discovered in today's Iraq. The earliest silver ornaments unearthed in my country have a history of more than 4,000 years. Silver ornaments mostly appeared on the emperor's crown and jade seal, and became a symbol of showing off wealth, power and status. Although the price of silver jewelry is not so expensive, the quality of silver jewelry is also very good. Because silver has good ductility and relatively toughness, the styles of silver jewelry are varied, and its color is also relatively fashionable, which can be matched with other types of materials. [0003] Jewelry needs to increase the hardness of the alloy to meet the requirements of wear resistance. Some jewelr...

AI Technical Summary

Problems solved by technology

However, these coatings are inevitably worn out in daily life, and the exposed silver substrate is corroded and vulcanized and blackened.

Therefore, this kind of silver jewelry will inevitably turn black after 6 months of use, which reduces the use perception of silver jewelry.

(2) At present, alloying has not achieved complete success in forming a corrosion-resistant layer on the surface of silver alloys. These alloys are not easy to crack because of poor processing performance, or show large voids and inclusions due to poor casting performance, making Product yield is very low

However, it is inevitable that these coatings will leak out of the silver base alloy due to wear and tear after several months of use, so the subsequent vulcanization and blackening are also inevitable.

[0007] Since the early 1980s, my country's gold and jewelry consumption has gone through several development stages: in the early stage of development, the purchase of jewelry was the main focus, and the value preservation function was emphasized, but the style and style rarely changed, and the variety was monotonous.