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Corrosion-resistant 18k gold for jewelry and its process

A corrosion-resistant and jewelry technology, applied in the field of alloys, can solve the problems of easy wear and deformation, and achieve the effects of avoiding oxidation loss, enhancing strength, and enhancing corrosion resistance.

Active Publication Date: 2022-01-11
深圳市宝瑞莱珠宝首饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soft gold deforms easily and wears out easily

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The invention provides a corrosion-resistant 18K gold for jewelry. The raw materials used (by weight percentage) include: Au: 75wt%-77wt%, Ni: 5.2wt%-5.6wt%, Cr: 0.5wt%-0.7 wt%, Mo: 1.2wt%-1.4wt%, W: 3.6wt%-3.8wt%, Nb: 0.9wt%-1.1wt%, Ta: 0.4wt%-0.6wt%, B: 0.2wt%-0.4 wt%, Zr: 2.5wt%-2.8wt%, the balance is silver;

[0021] Specifically in this embodiment, the raw materials used (by weight percentage) include: Au: 75wt%, Ni: 5.6wt%, Cr: 0.7wt%, Mo: 1.4wt%, W: 3.8wt%, Nb: 1.1wt%, Ta: 0.6wt%, B: 0.4wt%, Zr: 2.8wt%, Ag: 8.6wt%.

[0022] The present invention also includes a preparation process of 18K gold for corrosion-resistant jewelry, and the specific processing steps are as follows:

[0023] S1. Melting: Prepare Au and Ag raw materials according to the ratio, put them in the alumina crucible of the vacuum intermediate frequency induction melting furnace to melt, set the pressure condition in the furnace to 8-8.5Pa, and then fill the vacuum intermediate frequency inducti...

Embodiment 2

[0027] The invention provides a corrosion-resistant 18K gold for jewelry. The raw materials used (by weight percentage) include: Au: 75wt%-77wt%, Ni: 5.2wt%-5.6wt%, Cr: 0.5wt%-0.7 wt%, Mo: 1.2wt%-1.4wt%, W: 3.6wt%-3.8wt%, Nb: 0.9wt%-1.1wt%, Ta: 0.4wt%-0.6wt%, B: 0.2wt%-0.4 wt%, Zr: 2.5wt%-2.8wt%, the balance is silver;

[0028] Specifically in this embodiment, the raw materials used (by weight percentage) include: Au: 76wt%, Ni: 5.4wt%, Cr: 0.6wt%, Mo: 1.3wt%, W: 3.7wt%, Nb: 1wt%, Ta: 0.5wt%, B: 0.3wt%, Zr: 2.7wt%, Ag: 8.5wt%.

[0029] The present invention also includes a preparation process of 18K gold for corrosion-resistant jewelry, and the specific processing steps are as follows:

[0030]S1. Melting: Prepare Au and Ag raw materials according to the ratio, put them in the alumina crucible of the vacuum intermediate frequency induction melting furnace to melt, set the pressure condition in the furnace to 8-8.5Pa, and then fill the vacuum intermediate frequency induction ...

Embodiment 3

[0034] The invention provides a corrosion-resistant 18K gold for jewelry. The raw materials used (by weight percentage) include: Au: 75wt%-77wt%, Ni: 5.2wt%-5.6wt%, Cr: 0.5wt%-0.7 wt%, Mo: 1.2wt%-1.4wt%, W: 3.6wt%-3.8wt%, Nb: 0.9wt%-1.1wt%, Ta: 0.4wt%-0.6wt%, B: 0.2wt%-0.4 wt%, Zr: 2.5wt%-2.8wt%, the balance is silver;

[0035] Specifically in this embodiment, the raw materials used (by weight percentage) include: Au: 77wt%, Ni: 5.2wt%, Cr: 0.5wt%, Mo: 1.2wt%, W: 3.6wt%, Nb: 0.9wt%, Ta: 0.4wt%, B: 0.2wt%, Zr: 2.5wt%, Ag: 8.5wt%.

[0036] The present invention also includes a preparation process of 18K gold for corrosion-resistant jewelry, and the specific processing steps are as follows:

[0037] S1. Melting: Prepare Au and Ag raw materials according to the ratio, put them in the alumina crucible of the vacuum intermediate frequency induction melting furnace to melt, set the pressure condition in the furnace to 8-8.5Pa, and then fill the vacuum intermediate frequency inducti...

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Abstract

The invention discloses a corrosion-resistant 18K gold for jewelry and its technology, and specifically relates to the field of alloys. The raw materials used (by weight percentage) include: Au: 75wt%-77wt%, Ni: 5.2wt%-5.6wt% , Cr: 0.5wt%‑0.7wt%, Mo: 1.2wt%‑1.4wt%, W: 3.6wt%‑3.8wt%, Nb: 0.9wt%‑1.1wt%, Ta: 0.4wt%‑0.6wt% , B: 0.2wt%-0.4wt%, Zr: 2.5wt%-2.8wt%, and the balance is silver. In the present invention, gold and silver are used as the alloy matrix, supplemented by the addition of nickel, chromium, niobium, tantalum and zirconium raw materials, so that the good ductility of the obtained alloy can be maintained, and compact oxides can be formed on the surface of the obtained alloy The thin film is in a passive state, which can enhance the corrosion resistance of the alloy in both acidic and alkaline environments, and the addition of molybdenum, tungsten, and boron raw materials can not only enhance the stability of the chemical properties of the alloy, Moreover, the strength of the obtained gold alloy can be enhanced, and the performance of the obtained 18K gold alloy can be enhanced in many ways.

Description

technical field [0001] The invention relates to the technical field of alloys, more specifically, the invention relates to a corrosion-resistant 18K gold for jewelry and a process thereof. Background technique [0002] 18k gold is an alloy with a gold content of at least 75%, that is, an alloy with a gold content of 18 / 24, and the remaining 25% is other precious metals, including platinum, nickel, silver, palladium, etc. 18K gold is a kind of gold jewelry with lower cost and more comfortable to wear. In theory, only 100% gold can be called 24K gold, but in reality, it is impossible to have 100% gold, and gold with a content of more than 99.6% (including 99.6%) can be called 24K gold. The content of these kinds of K gold is the general specification of jewelry. Some gold jewelry is marked with text, which stipulates that: pure gold-the gold content is not less than 99%, thousand pure gold-the gold content is greater than 99.9%, and generally requires the production company c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/02C22C1/03C22F1/14
CPCC22C5/02C22C1/03C22F1/14
Inventor 朱文丽
Owner 深圳市宝瑞莱珠宝首饰有限公司