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Gold alloy including hardness improving elements

a technology of hardness improvement and gold alloy, applied in the field of chemistry, can solve the problems of insufficient hardness of conventional 96.5% gold for a design that requires durability, and achieve the effect of improving the hardness of gold alloy and the flow of melted gold, and reducing “porosity”

Inactive Publication Date: 2020-10-29
HIRUNJARU NOPPON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present disclosure introduces a new gold alloy with improved hardness and flowing properties during production. This results in a smooth surface appearance, reduced porosity and cracks in the workpiece, and high surface hardness. The process includes solution treatment, quenching, and aging, resulting in a -2.25k gold alloy with improved hardness compared to conventional 96% gold alloys. The new gold alloy can be formed to slim or complicated designs with no damage while remaining smooth, glossy, and bright yellow in color.

Problems solved by technology

The hardness of conventional 96.5% gold is insufficient for a design that requires durability.

Method used

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Examples

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Embodiment Construction

[0015]The present disclosure provides for a gold alloy including 96.4% to 97% gold by weight and the remaining percentage including other elements, such as hardness improving elements. The other elements may improve various properties of the gold alloy or the production of the gold alloy. In some examples of the present disclosure, the gold is mixed or diluted with the hardness improving elements.

[0016]In some examples, hardness improving elements are provided in the proportion of 0.1-3.6% by weight. The hardness improving elements are selected from one or more elements among: copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), gallium (Ga), tin (Sn), antimony (Sb), and iron (Fe). In some examples, if only copper (Cu) or zinc (Zn) or both are selected, then the proportion by weight of copper (Cu) and zinc (Zn) is 0.5 to 3.6%.

[0017]In some examples, elements improving the flowing of a melted gold alloy in the production process, reducing the shrinkage, and / or improving the surface qual...

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Abstract

The present disclosure provides for a gold alloy composition that has a greater hardness than conventional gold alloys of the same composition. The gold alloy composition includes 96.4-97% gold by weight. The composition also includes elements improving hardness and golden yellow color in the proportion of 3-3.6% by weight, which are one or more elements among: silver, copper, zinc, nickel, cobalt, gallium, tin, antimony, and iron. The composition also includes elements improving the flowing of melted gold alloy and surface smoothness, which are one or more elements among: iridium, palladium, aluminum, indium, silicon, germanium and lead. An example procedure is also provided to increase the hardness of gold alloys.

Description

PRIORITY CLAIM[0001]The present application claims priority to Thai Application No. 1901002436, filed Apr. 23, 2019, the entire contents of which are incorporated herein by reference and relied upon.FIELD OF THE INVENTION[0002]The present invention relates to chemistry in relation to a gold alloy including hardness improving elements.BACKGROUND OF THE INVENTION[0003]Gold (Au) is a natural metallic mineral. It is solid with a unique bright yellow color. Gold is inert to most chemical reactions, for example, it does not react when exposed to oxygen or acid. Therefore, it is resistant to rusting, tarnishing or corrosion by acid. Gold is soft, malleable and ductile making it capable of being formed into wires or thin sheets. With its great properties, gold became a high value metal used as collateral for foreign exchange trading, jewelry, fine arts, and is also used in other industries such as dental work, electronic circuits (CPU), coins, etc. Jewelry and fine arts are the majority of ...

Claims

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Application Information

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IPC IPC(8): C22C5/02C22F1/14
CPCC22C5/02C22F1/14
Inventor HIRUNJARU, NOPPON
Owner HIRUNJARU NOPPON