Yellow silver alloy for jewelry with hydrogen sulfide corrosion resistance and tarnish resistance and machining technology thereof

Abstract

The invention discloses a yellow silver alloy for jewelry with hydrogen sulfide corrosion resistance and tarnish resistance and a machining technology thereof. The alloy comprises the following components of, by weight, 0.1-0.2% of C, 1.0-1.2% of Y, 1.5-1.8% of Ti, 0.2-0.5% of Hf, 10.0-12.0% of Zn, 0.8-1.2% of Mo, 15.0-15.4% of Cu, and the balance silver. The material provides a solution of material science for the silver alloy with the yellow impression for the jewelry in China, and the product has excellent characteristics of the hydrogen sulfide corrosion resistance and blackening resistance; the implementation and industrialization of the material can effectively solve the problem of insufficient variety of products and the development restricting of the silver in the field of color silver, and a huge economic result and a social benefit can be obtained 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] Humans have discovered and used silver and silver alloys for thousands of years. The oldest silver jewelry with a history of more than 5,000 years was discovered in Iraq today. The earliest silver jewelry unearthed in my country has a history of more than 4,000 years. Silver jewelry appeared in the crown and jade seal of the emperor, 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 toughness, the style of silver jewelry has changed a lot, and its color is more fashionable, and it can be matched with other kinds of materials. [0003] Jewelry needs to increase the hardness of the alloy to meet the requirements of wear resistance. Some structural parts of jewelry, such as ear pins, ear ...

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.