KR20120085127A

KR20120085127A - Alloy composite for low purity gold and low purity gold using the same

Info

Publication number: KR20120085127A
Application number: KR1020110006565A
Authority: KR
Inventors: 이한동
Original assignee: 이한동
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2012-07-31

Abstract

In the present invention, when a small amount of 2K (Karat) or 4K gold (Au) is added by mixing silver (Ag) and copper in a predetermined ratio to brass, which is an alloy of copper (Cu) and zinc (Zn), The color of Edo gold is expressed as it is, and it shows the characteristics of high purity gold as it does not rust or allergic when worn on the human body. A novel low purity gold alloy composition and a low purity gold using the same are widely used for a wide range of decorative materials such as bags and handbags.
The alloy composition for low purity gold according to the present invention is 19.5% by weight of silver (Ag) of 99.99% purity in 73.0% by weight of brass, which is an alloy in which zinc (Zn) and copper (Cu) are mixed at 30% by weight and 70% by weight, respectively. It is composed of 7.5% by weight of 99.99% pure copper.

Description

Alloy composition for low purity gold and low purity gold using it {ALLOY COMPOSITE FOR LOW PURITY GOLD AND LOW PURITY GOLD USING THE SAME}

The present invention relates to an alloy composition for low-purity gold and low-purity gold using the same, and more specifically, silver (Ag) and copper are defined in brass (黄銅), which is an alloy of copper (Cu) and zinc (Zn). Even when 2K (Karat) or 4K trace amount of gold (Au) is added by mixing with, the color of gold is expressed as it is, and only high purity gold does not cause any rust or allergy when worn on the human body. It has the same characteristics as it is, and its weight is lighter than that of high-purity gold, so it can be used for various accessories for body accessories, glasses frames, cutlery, bags, handbags, etc. It is about.

In general, gold is a shiny yellow soft metal, ductile and malleable transition metal. Gold is brilliant and hardly discolored, and has high scarcity. As can be seen, it is widely used as a jewel, and since gold does not rust in any case, it is widely used for making various kinds of jewelry using plating.

Figure 1. Gold Ring

Figure 2. Gold Wallet

In addition, gold has high malleability, ductility, and high electrical conductivity, so it is an important function for industrial use. For example, 1 g of silver can be extended to 1500 m long, while gold can be extended to 3,000 m, which is twice as high as silver. 70%, the electrical conductivity is 67% of the silver is not oxidized even when heated or melted at high temperature, does not discolor in the air or water, in particular, the electrical conductivity is excellent, the demand in the electrical and electronics industry is increasing gradually in recent years.

However, since gold is not easily obtained and its physical properties are very low, pure gold alone changes its shape even with a small impact. Therefore, in order to make various ornaments or ornaments using gold, a gold alloy inevitably combined with other metals is used.

Such a gold alloy is a mixture of other metals with the original pure gold, usually 24K, 22K, 20K, 18K, 14K, etc. according to the mixing ratio of the pure gold according to the mixing ratio of pure gold, in the past 10K, 8K, etc. However, since the color is changed and workability is not recognized by the craftsman, only three types of 24K, 18K, and 14K are currently distributed in Korea.

On the other hand, as a base metal mixed with pure gold when making a gold alloy, reddish brown gloss copper is generally used.

"K", which represents the purity of gold, is an abbreviation of "Karat". Since the mixing ratio of pure gold uses the binary system, 1K is 1/24 as the following calculation method. This is 4.1666 ..%, and 24K refers to 24/24 (= 4.1666 × 24), that is, pure gold.

1K = 4.1666 ...% pure gold content

14K = 4.1666 × 14 = about 58.5%

18K = 4.1666 × 18 = about 75%

24K = 4.1666 × 24 = 100%

The 18K gold alloy is made of 75% pure gold and 25% copper, which is called red gold because it is red in color. The 14K gold alloy is also made of copper and has the same color as bronze.

On the other hand, when making a gold alloy, other metals other than copper may be added, and when it is made by mixing iron (Fe) with pure gold, it becomes purple gold, and when it is made by mixing aluminum with pure gold, it becomes bluish lapis lazuli (靑金).

In addition, when silver (Ag) is mixed with 14K and 18K gold alloys, it becomes greenish green gold, and when pure gold is added with 17.3% nickel, 5.5% zinc, 2.2% copper and a small amount of silver, white 18K gold alloy (aka white gold) is made.

However, in the case of the conventional gold alloy made as described above, the smaller the amount of gold added, there is a problem that the unique color of gold is not expressed at all, and when wearing jewelry made of such a gold alloy on a human body, Easily oxidized due to salts, etc., there is a problem such as rust and black color change.

In addition, when wearing jewelry made of a gold alloy containing gold of low purity on the human body, redness occurs on the skin of the worn part or, in severe cases, allergies such as dermatitis, the use and demand is The problem is that it is extremely insignificant.

The present invention is to solve such a conventional problem, the object of the 2K (Karat) by mixing silver (Ag) and copper in a predetermined ratio to brass (黄銅), an alloy of copper (Cu) and zinc (Zn) ) Or 4K trace amount of gold (Au) is added, the color of the gold is expressed as it is, and new low low gold so that it can express the characteristics of high purity gold without any rust or allergy when worn on the human body It is to provide an alloy composition for purity gold.

Another object of the present invention is a new low-purity gold that can be used in a wide range of fields, such as body accessories, eyeglass frames, cutlery, ornaments such as bags or handbags because the specific gravity of the present invention is lighter than the high-purity gold. To provide.

In order to achieve the above object, the alloy composition for low purity gold according to the present invention is a 99.99% purity in 73.0% by weight of brass (zn) and copper (Cu) is an alloy mixed with 30% by weight and 70% by weight, respectively. 19.5% by weight of silver (Ag) and 7.5% by weight of 99.99% pure copper are mixed.

Low-purity gold according to the present invention is added and mixed with 0.834% or 1.666% by weight of pure gold in an alloy composition of 73.0% by weight of brass, 19.5% by weight of 99.99% pure silver (Ag), and 7.5% by weight copper. Has a purity of 2K or 4K.

According to the present invention, even when a small amount of pure gold is mixed in a large amount of brass, which is very similar to the color of the vault oil as a gold alloy, high purity gold-like color is expressed, as well as no rust or allergy when worn on the human body. It does not cause oxidization and does not oxidize by salts contained in human sweat, and thus exhibits the properties of high purity gold as it is.

In addition, as described above, while exhibiting the characteristics of high purity gold as it is, its specific gravity is lighter than that of high purity gold, and thus it can be widely used in various accessories, such as body accessories, eyeglass frames, cutlery, bags, handbags, etc. It is effective.

Hereinafter, preferred embodiments of the present invention will be described in more detail.

In the alloy composition for low purity gold according to the present invention, brass, copper and silver are mixed and melted at a predetermined ratio, respectively.

In the present invention, brass is an alloy in which zinc (Zn) and copper (Cu) are mixed at 30% by weight and 70% by weight, respectively, and are added at 73.0% by weight in order to exhibit a unique color of gold, but brass is less than 73.0% by weight. When added as, the gold color is not properly expressed, and when brass is added in excess of 73.0%, the color is changed as it is oxidized with time.

In the present invention, silver and copper are mixed with brass to express the color of the vault oil and are added to impart ductility, and 99.99% pure ones are used.

19.5% by weight of silver is added, and 7.5% by weight of copper is added, and when silver and copper are added in less than a predetermined ratio, there is a problem in expressing the color of the vault oil. It is disadvantageous, and ductility increases, and a processing problem arises.

The alloy for low purity gold according to the present invention is obtained by putting brass, silver, and copper accurately weighed in an electric melting furnace, respectively, and dissolving at 900 to 1,100 ° C. for 10 to 30 seconds based on 100 g of the mixture.

On the other hand, low-purity gold according to the present invention is obtained by mixing and dissolving a trace amount of pure gold in the alloy composition for low-purity gold obtained above, 73.0% by weight of the brass, 19.5% by weight of silver (Ag) of 99.99% purity, copper Melting together by adding 0.834% or 1.668% by weight of pure gold to 7.5% by weight of the alloy composition is obtained to obtain a low purity gold having a purity of 2K or 4K.

For example, low purity gold having a purity of 2K is obtained by mixing and melting by adding 0.834% by weight of pure gold to an alloy composition of 99.166% by weight, and low purity gold having a purity of 4K is contained in an alloy composition of 98.332% by weight. It is obtained by mixing and melting 1.668 weight% of pure gold.

The low purity gold of 2K or 4K thus obtained has a very low content of pure gold, and when mixed with brass, its unique color is expressed as it is, and it does not rust at all when worn on the human body or exposed to air for a long time. It shows the characteristic of high purity gold as it is.

As described above, the low purity gold according to the present invention exhibits the characteristics of high purity gold as it is, but has a low specific gravity compared to high purity gold, and is widely used as a decoration for various accessories, glasses frames, cutlery, bags, handbags, etc. Can be used.

Claims

19.5% by weight of silver (Ag) of 99.99% purity and 7.5% by weight of copper of 99.99% purity are mixed with 73.0% of brass, which is an alloy in which zinc (Zn) and copper (Cu) are mixed at 30% and 70% by weight, respectively. Alloy composition for low purity gold, characterized in that.

To the alloy composition containing 73.0% by weight of brass, 19.5% by weight of 99.99% pure silver, and 7.5% by weight copper, 0.834% by weight or 1.668% by weight of pure gold is added and mixed to have a purity of 2K or 4K. Low purity gold characterized by.