KR102234078B1 - Method for producing palladium-containing white gold alloy - Google Patents

Abstract

The present invention relates to a method of manufacturing a white gold alloy containing palladium. In the case of existing white gold, white plating is performed for coloring and lustering, but, in the present invention, a white gold alloy containing palladium is produced such that the need for plating can be eliminated, which can lead to the elimination of the need for a plating process at a jewelry processing factory, thus lowering uncertainty through outsourcing and reducing process procedures and completion periods to bring about an effect of increasing the economic feasibility of a product. In order to achieve the effect, the white gold alloy comprises: 75.0 wt% of pure gold (Au); 0.4 wt% of silver (Ag); 10.0 wt% of copper (Cu); 2.9 wt% of zinc (Zn); 3.2 wt% of nickel (Ni); 0.1 wt% of chrome (Cr); and 8.4 wt% of palladium.

Description

Method for producing palladium-containing white gold alloy. {Method for producing palladium-containing white gold alloy}

The present invention relates to a method for producing white gold containing palladium, and more particularly, to an improvement in white color of 18K white gold.

Initial white gold was made by alloying platinum (Pt), palladium (Pd), silver (Ag), nickel (Ni), and zinc (Zn), and is largely divided into nickel-based white gold and palladium-based white. In modern times, white gold alloys, whose content is determined so that these materials can be safely alloyed, are manufactured and sold separately, and these white gold alloys gradually decrease in content as the value of platinum, palladium, and silver increases over time. Gada White gold alloys that are available nowadays contain less than 5% silver. As a result, white gold is made of grayish or grayish lemon color, which is not enough to call white gold and its actual color is white gold. The clear white gloss must capture the hearts of consumers, so it goes through the plating process at the end. Nickel (Ni) plating and rhodium (Rh) plating are widely used as materials for plating, and in the case of nickel plating, the gloss and white effect are strongly expressed and the ease of work is excellent, but the plating peels off well and causes an unhealthy allergic reaction. It is rarely used these days. In the case of rhodium plating, the white gloss effect is less than that of nickel plating, but the soft, clear white is maintained for a long time, and there is no physical allergic reaction, but there is a problem that the re-plating work due to scratches is undesirable.

The prior art includes Patent Publication No. 10-2009-0041135 "Carbon or graphitized nanofibers in which platinum group metal particles are dispersed, and a manufacturing method thereof".

White gold made of such white gold alloy enhances safety when alloyed with gold, but it has the disadvantage of having to be white plated because it does not produce a pure white color.In order to improve this disadvantage, a metal that generates a white effect is added as an alloy material. The purpose of this is to produce white gold that does not require plating, and to provide a white gold alloy containing palladium that has excellent castability and workability at a relatively low cost, and has a high-quality white color and improved gloss on the surface. .

In order to achieve the above object, the white gold alloy in the present invention is pure gold (Au) 75.0 wt%, silver (Ag) 0.4 wt%, copper (Cu) 10.0 wt%, zinc (Zn) 2.9 wt%, nickel (Ni) It consists of 3.2% by weight, 0.1% by weight of chromium (Cr), and 8.4% by weight of palladium, and the process sequence is 0.4% by weight of silver, 10% by weight of copper, 2.9% by weight of zinc, 3.2% by weight of nickel, 0.1% by weight of chromium at room temperature. A first melting step of preparing a first mixture by placing it in an electric furnace having a firing temperature of 750°C and a casting temperature of 680°C to 690°C when the temperature is 30°C; A second melting process in which 8.4% by weight of palladium is sufficiently dissolved in the first mixture prepared in the first melting process to prepare a second mixture; After pouring the second mixture through the second melting process into the first ingot 910 A first ingot radiant heat process of sufficiently melting using radiant heat at ℃; Pure gold injecting process in which 75.0 wt% of pure gold is added to the first ingot passed through the first ingot radiant heat process and then sufficiently mixed to form a third mixture; A second ingot frame process of injecting the third mixture generated in the pure gold input process into a second ingot frame (goldol stone) again to form a fourth mixture formed into a lump; This is a melting furnace process in which the agglomerated fourth mixture that has passed through the second ingot frame (goldol stone) process is melted in a melting furnace and then subjected to suction casting.

In the present invention, in the case of conventional white gold, white plating is performed for color and gloss, but nickel plating, silver plating, palladium plating, rhodium plating, and platinum plating are performed depending on the type of plating. Because it is produced with white gold alloy, the plating process is not necessary in the case of jewelry processing failure, so all processes in the factory are one-stop, reducing uncertainty through outsourcing, shortening the process process and completion period, increasing product economics, and small retailers selling jewelry. They can reduce the cost of handwork, which was inevitable due to the shortened time, process, and plating cost in the processing plant. Newly, white gold improves economic value with high added value that maintains the white luster for a lifetime even without plating. There is an effect of increasing profits.

1 is a process diagram according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

In the description of the present invention, the defined terms are defined in consideration of functions in the present invention, which may vary according to the intention or custom of a technician engaged in the relevant field, so the definition is based on the contents throughout the present specification. It will have to be lowered.

White gold alloy composition ratio containing palladium

Silver (Ag) 0.4% by weight

Copper (Cu) 10.0% by weight

Zinc (Zn) 2.9% by weight

Nickel (Ni) 3.2% by weight

0.1% by weight of chromium (Cr)

Palladium (Pd) 8.4% by weight

Pure gold (Au) 75.0% by weight

Total: 100.0% by weight

First melting process (100)

Silver 0.4% by weight, copper 10.0% by weight, zinc 2.9% by weight, nickel 3.2% by weight, and chromium 0.1% by weight are placed in an electric furnace with a firing temperature of 750℃ and a casting temperature of 680℃ to 690℃ when the room temperature is about 30℃. 10) Manufacturing process.

Second melting process (200)

A process of preparing the second mixture 20 by sufficiently melting 8.4% by weight of palladium in the first mixture 10 prepared in the first melting process.

The first ingot mold radiation heat process (300)

A process in which the second mixture 20 that has undergone the second melting process is poured into the first ingot (gold stone) and then sufficiently melted using radiant heat of about 910°C.

Pure gold input process (400)

A process of generating a third mixture (30) by sufficiently well mixing after adding 75.0% by weight of pure gold to the first ingot through the first ingot frame radiant heat process (300).

The second ingot mold process (500)

A process of making a fourth mixture (40) formed into a lump by adding the third mixture (30) generated in the pure gold input process to the second ingot (goldol) again.

Melting furnace process (600)

A process of melting the agglomerated fourth mixture (40) that has undergone the second ingot (goldol) process in a melting furnace and then molding by suction casting.

The present invention consisting of the above process is pure gold (Au) 75.0% by weight, silver (Ag) 0.4% by weight, copper (Cu) 10.0% by weight, zinc (Zn) 2.9% by weight, nickel (Ni) 3.2% by weight, chromium It relates to a white gold alloy consisting of (Cr) 0.1% by weight and 8.4% by weight of palladium. This will be described in detail with reference to the accompanying FIG. 1.

The first melting process 100 is to melt 0.4% by weight of silver, 10.0% by weight of copper, 2.9% by weight of zinc, 3.2% by weight of nickel, and 0.1% by weight of chromium in an electric furnace having a firing temperature of 750℃ and a casting temperature of 680℃ to 690℃. This is a process of manufacturing the first mixture 10.

The second melting process 200 is a process of manufacturing the second mixture 20 by sufficiently melting 8.4% by weight of palladium in the first mixture 10 prepared in the first melting process 100.

The 8.4% by weight of palladium was able to emit a gloss most similar to that of platinum when using 8.4% by weight of palladium as shown in Table 1 below.

Comparison table by amount of palladium
Palladium content

Product 1
Product 2


0%

5%

8.4%

10%

12.5%

A first ingot frame radiant heat process 300 in which the second mixture 20 that has undergone the second melting process is poured into the first ingot frame (gold stone) 21 and then sufficiently melted using radiant heat of about 910°C. As described above, as the melting point of palladium is 1553°C, sufficient radiant heat must be used, so that the first ingot frame radiant heat process is indispensable.

After adding 75.0% by weight of pure gold to the second mixture 20 that has passed through the first ingot radiant heat process 300, it is sufficiently well mixed to undergo a pure gold input process 400 to produce a third mixture 30,

The third mixture 30 that has passed through the pure gold input process 400 is added to the second ingot frame (gold stone) 22 to make a fourth mixture 40 formed into a lump.

It consists of a melting furnace process 600 in which the lumped fourth mixture 40 that has been subjected to the second ingot frame (goldol) process is melted in a melting furnace and then molded by suction casting.

100 First melting process.
200 Second melting process.
300 No. 1 ingot frame radiant heat process.
400 pure gold input process.
500 Second ingot frame radiant heat process.
600 furnace process.
10 first mixture.
20 second mixture.
30 third mixture.
40 fourth mixture.

Claims (1)

Prepare the first mixture by putting 0.4% by weight of silver, 10.0% by weight of copper, 2.9% by weight of zinc, 3.2% by weight of nickel, and 0.1% by weight of chromium in an electric furnace with a firing temperature of 750℃ and a casting temperature of 680℃ to 690℃ at a room temperature of 30℃. A first melting process; A second melting process in which 8.4% by weight of palladium is sufficiently dissolved in the first mixture prepared in the first melting process to prepare a second mixture; After pouring the second mixture through the second melting process into the first ingot 910 A first ingot radiant heat process of sufficiently melting using radiant heat at ℃; A pure gold input process in which 75.0% by weight of pure gold is added to the first ingot that has undergone the first ingot radiant heat process and then sufficiently mixed to form a third mixture; A second ingot frame process of injecting the third mixture generated in the pure gold input process into a second ingot mold (goldol stone) again to form a fourth mixture formed into a lump; A method for producing a white gold alloy containing palladium, characterized in that consisting of; a melting furnace process in which the agglomerated fourth mixture that has been subjected to the second ingot (goldol) process is melted in a melting furnace and then molded by suction casting.

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