Alloy for jewelry and its manufacturing method

Abstract

In addition to its decorative effect, it also has multiple functions and is highly efficient to manufacture. For accessories To provide an alloy and a method for producing the same. Decorative metal Only silver and copper are used as decorative metals, and four other metals, iridium, tungsten, indium, and palladium, are used in addition to the decorative metals. The blending ratio of silver and copper is several tens of percent by weight, and the blending ratios of the four metals, zinc, and platinum are significantly smaller than the several tens of percent by weight. alloy The alloy for jewelry is selected from white, silver-white, deep pink, and light pink by adjusting the weight ratio of silver and copper, and the alloy for jewelry is made of silver and copper as decorative metals and the above four kinds of metals. The process involves mixing, casting and polishing in three stages. Through manufacturing methods A configuration that achieves the above object.

Description

[Technical Field]

[0001] The present invention is intended for jewelry use and other applications. For accessories It covers alloys and their manufacturing methods. [Background technology]

[0002] In alloys containing decorative metals, particularly alloys for jewelry, the construction of mixing other metals into the decorative metal to achieve a predetermined function has been disclosed as a publicly known technique. Incidentally, decorative metals are metals that literally exhibit decorative effects, and typically include precious metals such as gold, silver, platinum group metals represented by platinum, palladium group metals represented by palladium, and even copper.

[0003] For example, in Patent Document 1, silver is used as the decorative metal, and by containing one of a typical metal element, a metalloid element, or a transition metal element, the sulfidation resistance and corrosion resistance of silver are improved (Claim 2 and paragraph

[0025] ).

[0004] Similarly, in Patent Document 2, gold, silver, and platinum are all used as decorative metals, and by containing indium and the like, corrosion resistance is achieved (Claim 1 and paragraph

[0015] ).

[0005] However, there are many metals that not only provide corrosion resistance but also have various other functions and that contain metals other than decorative metals, which improve manufacturing efficiency. For accessories The alloy composition has not been proposed so far. In particular, when alloys for jewelry are worn on the body, the decorative metals such as silver and copper tend to discolor due to sweat and other factors, making plating of the alloys for jewelry essential. However, no alloy for jewelry has been developed that prevents such discoloration and does not require plating. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-037169 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-179890 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention provides multi-functionality in addition to decorative effects, and also allows for high manufacturing efficiency. For accessories The objective is to provide an alloy and a method for producing the alloy. [Means for solving the problem]

[0008] In order to solve the problems, the basic configuration of the present invention is as follows. (1) Silver and copper as decorative metals In addition to the decorative metals, four other metals are used: iridium, tungsten, indium, and palladium. The silver content is 29.60-95.60 wt%, the copper content is 3.93-69.76 wt%, the respective content ratios of the four metals are 0.01-0.10 wt%, and the total content ratio is 0.07-0.20 wt%. In addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31-0.52 wt% and 0.01-0.05 wt%, respectively. Alloy for jewelry And, The weight ratio of silver to copper is 、 92.00~94.00 Selected values in the entire range of values :5.00~7.00 Selected values in the entire range of values The alloy for jewelry exhibits a white color by setting the above. (2) Silver and copper as decorative metals In addition to the decorative metals, four other metals are used: iridium, tungsten, indium, and palladium. The silver content is 29.60-95.60 wt%, the copper content is 3.93-69.76 wt%, the respective content ratios of the four metals are 0.01-0.10 wt%, and the total content ratio is 0.07-0.20 wt%. In addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31-0.52 wt% and 0.01-0.05 wt%, respectively. Alloy for jewelry And, The weight ratio of silver to copper is 、 94.50~96.00 Selected values in the entire range of values :3.00~4.50 Selected values in the entire range of values By setting the above, the alloy for jewelry exhibits a silvery white color. (3) Silver and copper as decorative metals In addition to the decorative metals, four other metals are used: iridium, tungsten, indium, and palladium. The silver content is 29.60-95.60 wt%, the copper content is 3.93-69.76 wt%, the respective content ratios of the four metals are 0.01-0.10 wt%, and the total content ratio is 0.07-0.20 wt%. In addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31-0.52 wt% and 0.01-0.05 wt%, respectively. Alloy for jewelry And silver and copper The weight ratio of , selected values in the entire range of 24.00 to 34.00 : Selected values within the full range of 65.00 to 75.00 This alloy for jewelry exhibits a deep pink color when set as follows: ( 4 ) As decorative metals, silver, copper In addition to the decorative metals, four other metals are used: iridium, tungsten, indium, and palladium. The silver content is 29.60-95.60 wt%, the copper content is 3.93-69.76 wt%, the respective content ratios of the four metals are 0.01-0.10 wt%, and the total content ratio is 0.07-0.20 wt%. In addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31-0.52 wt% and 0.01-0.05 wt%, respectively. Alloy for jewelry And silver and copper The weight ratio of , selected values in the entire range of 40.00 to 55.00 : Selected values within the full range of 44.00 to 59.00 The alloy for jewelry exhibits a pale pink color when set as follows: ( 5 ) by the following process Any one of the above (1), (2), (3), and (4) Described For accessories Methods for producing alloys. 1 silver, copper, Iridium, tungsten, indium, palladium , zinc, platinum Preparation of a mixture of all of the above. 2. Casting the mixture of step 1 by heating. 3 Polishing in the following order: (1) Barrel polishing, in which protrusions on the surface of each casting are removed by colliding them with each other in a rotating container. (2) Intermediate polishing with a rotary tool having a textured surface. (3) Final polishing to achieve gloss using rotary tools with no textured surfaces. [Effects of the Invention]

[0009] Basic configuration (1), (2) 、(3)、(4) In this case, By varying the ratio of silver and copper, jewelry alloys can be achieved in a variety of desired colors. Not only that, but in basic configurations (1), (2), (3), and (4), The following effects can be achieved: The inclusion of iridium not only contributes to improving the corrosion resistance of decorative metals, as in the case of Patent Document 1, but also makes them less susceptible to wear, as is evident from the fact that iridium is used in pen nibs and the like. Moreover, since iridium has few porosity and is highly dense, a dense alloy can be formed by setting the content to a predetermined level, specifically, 3.00% by weight or more. b. As in the case of Patent Document 2, the inclusion of palladium can contribute to improving corrosion resistance. c Tungsten improves the hardness of the alloy, Basic configurations (1), (2), (3), and (4) When copper is used as the decorative metal, the effect of this improvement is remarkable. d Indium not only contributes to improving corrosion resistance as in Patent Document 2, but also contributes to making the alloy transparent by setting a predetermined content, specifically, 2.00 wt% or more. e. By containing the above four types of metals, discoloration caused by sweat adhering to decorative metals can be prevented, making plating unnecessary for this purpose. Moreover, such inclusion can also improve gloss. Furthermore, by using zinc as a metal other than the four types mentioned above, high bending stress resistance can be achieved, while by uniformly mixing multiple decorative metals and by having minute pores on the surface, high gloss can be obtained, and by using platinum, corrosion resistance and ease of processing can be achieved.

[0010] The exact chemical mechanism behind the effects of preventing discoloration and improving gloss due to the above-mentioned e is unknown. However, if even one of the four metals is missing, this effect becomes impossible, and this effect can be confirmed.

[0011] Basic configuration ( 5 ) not only does not require electrolytic polishing as in the case of ordinary alloys, but also makes it possible to achieve extremely efficient polishing, the specific details of which will be described later in the embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0012] Below are the basic configurations (1), (2), (3) 、(4)、(5) The embodiments thereof will be specifically described below.

[0013] Basic configuration (1) 、(2)、(3)、(4) In order to achieve the effects of a, b, c, d, and e, the amount of ingredients required is as follows: The lower limit of the weight percentage of each of the four metals is set at 0.01 wt%, and the lower limit of the total weight percentage is set at 0.07 wt%. is set. However, when a predetermined content is required in the above a and d, the lower limit does not correspond to the standard value.

[0014] On the other hand, basic configuration (1) 、(2)、(3)、(4) In this case, the decorative effect is not affected, and the four metals mentioned above are rare metals, so the cost burden was taken into consideration. The upper limit of each weight percentage is set at 0.10% by weight, and the upper limit of the total weight percentage is set at 0.20% by weight. is set.

[0015] Basic configuration (1) 、(2)、(3)、(4) It is preferable that the ratio of the amounts of the four metals mixed in the alloy is uniform. However, the inventors' experience has confirmed that when the minimum blending amount of the four metals is 1 / 3 or more of the maximum blending amount, the effects of a, b, c, d, and e can be achieved. However, when a predetermined content is required in the above a and d, the above ratio does not necessarily correspond to the standard value.

[0016] Basic configuration (1)、(2)、(3)、(4) In the above, an embodiment can be realized in which the jewelry alloy is in the form of a chain with fastening devices at both ends. Chain-shaped jewelry alloys are used in necklaces, bracelets, rings, etc., but in the case of necklaces in particular, they tend to sway when worn, and as a result, friction between the units that make up the chain cannot be avoided during molding. However, in the above embodiment, the function of being resistant to wear due to the above item a can be exhibited.

[0017] Basic configuration (1) 、(2)、(3)、(4) In the case of the above, as a metal that exhibits effects other than decorative effects, any of zinc, platinum, germanium, and rhenium is used as a metal other than the above four types of metals. One or more The present invention can employ an embodiment characterized in that the components are contained in an amount of 0.01 to 1.00% by weight, and the effects of this embodiment are as follows.

[0018] In the case of zinc, As mentioned above, Its high ductility and malleability make it easily deformable, allowing it to withstand high bending stress, while the uniform mixture of multiple decorative metals and the minute pores on the surface allow it to achieve a high gloss.

[0019] Platinum is As mentioned above, This contributes to the functions of being rust-resistant and easy to process. Germanium can contribute to the functions of sulfidation resistance and ease of processing in decorative metals. Rhenium can contribute to improved corrosion resistance and hardness. The lower limit of 0.01% by weight is set as the amount that is essential for achieving each of the above functions, and the upper limit of 1.00% by weight is set so that the decorative effect will not be impaired when further added to the four types of metals.

[0020] In this way, in the case of the above embodiment, it is possible to achieve effects other than the above a, b, c, d, and e.

[0021] Basic configuration ( 5 ) does not require electrolytic polishing, and the reason for this is thought to be that in the case of iridium, which has the property of being resistant to wear, the surface is very smooth and has very few protrusions.

[0022] Basic configuration ( 5 In the above-mentioned 3(1), (2), and (3) polishing, the polishing can be completed in approximately half the time compared to polishing a normal accessory.

[0023] Such effects can be confirmed by comparing the results of polishing the decorative metals alone, without the four metals mentioned above, in accordance with 3(1), (2), and (3) above.

[0024] At present, there is no accurate analysis based on metallurgy as to why efficient polishing is possible. However, it can be assumed that the inclusion of tungsten provides high hardness, while the inclusion of iridium makes the surface less susceptible to wear, resulting in a relatively smooth surface.

[0025] Basic configuration ( 5 ) can be adopted an embodiment characterized in that the temperature of the mixing step in a vacuum state is 1850°C and the temperature of the casting is 1100°C. In the production of the alloy of basic structure (1), the temperature in the conventional mixing process is about 1000°C, but in the case of the temperature of 1850°C, it exceeds the melting points of all the decorative metals described in paragraph

[0002] , and an extremely uniform mixed state can be achieved. The casting temperature for conventional alloys is approximately 750°C, but by setting the temperature at 1100°C as described above, it is possible to achieve efficient casting in a short time. Incidentally, among the decorative metals mentioned in paragraph

[0002] , the melting points of gold, silver, and copper are lower than 1100°C, so when these decorative metals are used for casting, the casting can be carried out with a rapid flow of metal. The following will explain the present invention based on examples. [Example]

[0026] Example 1 is a basic configuration ( 1 ) is characterized by the use of the following blending amounts. Silver: 93.50% by weight Copper: 6.11% by weight Zinc: 0.31% by weight Platinum: 0.01% by weight Indium: 0.02% by weight Tungsten: 0.02% by weight Palladium: 0.02% by weight Iridium: 0.01% by weight By using such a blend, among the effects of a, b, c, d, and e, it is possible to confirm the effects other than those when the specified content of a and d is required. Furthermore, for the manufacturing process involving such blending, the basic structure ( 5 ) and other efficient polishing effects can be confirmed. [Example]

[0027] Example 2 is characterized by employing the following blending amounts in the basic structure (2) that exhibits silvery white color. Silver: 95.60% by weight Copper: 3.93% by weight Zinc: 0.38% by weight Platinum: 0.02% by weight Indium: 0.02% by weight Tungsten: 0.02% by weight Palladium: 0.02% by weight Iridium: 0.01% by weight By using such a blend, among the effects of a, b, c, d, and e, it is possible to confirm the effects other than those when the specified content of a and d is required. Furthermore, for the manufacturing process involving such blending, the basic structure ( 5 ) and other efficient polishing effects can be confirmed. [Example]

[0028] Example 3 is characterized by the use of the following blending amounts in the basic configuration (3) that exhibits a deep pink color. silver: 29.60 weight% copper: 69.76 weight% Zinc: 0.40% by weight Platinum: 0.04% by weight Iridium: 0.10% by weight Tungsten: 0.06% by weight Indium: 0.02% by weight Palladium: 0.02% by weight By using such a blend, among the effects of a, b, c, d, and e, it is possible to confirm the effects other than those when the specified content of a and d is required. Furthermore, for the manufacturing process involving such blending, the basic structure ( 5 ) and other efficient polishing effects can be confirmed. [Example]

[0029] Example 4 is characterized by the use of the following blending amounts in the basic composition (4) that exhibits a pale pink color. silver: 42.77 weight% copper: 56.48 weight% Zinc: 0.52% by weight Platinum: 0.05% by weight Iridium: 0.08% by weight Tungsten: 0.06% by weight Indium: 0.02% by weight Palladium: 0.02% by weight By using such a blend, among the effects of a, b, c, d, and e, it is possible to confirm the effects other than those when the specified content of a and d is required. Furthermore, for the manufacturing process involving such blending, the basic structure ( 5 ) and other efficient polishing effects can be confirmed. [Industrial Applicability]

[0030] Thus, in the alloy of the present invention, the four types of metals are used together with decorative metals. The compounding ratio of each metal is 0.01 to 0.10% by weight, and the total compounding ratio is 0.07 to 0.20% by weight. In addition to the four metals, zinc is compounded at a ratio of 0.31 to 0.52% by weight, and platinum is compounded at a ratio of 0.01 to 0.05% by weight. By doing so, the use as an accessory and other uses can be realized, and the above a, b, c, d, e 、f The present invention can exert various functions as described above, and can also realize an efficient polishing process, and therefore has great industrial applicability.

Claims

1. An alloy for personal ornaments, which uses only silver and copper as decorative metals and, in addition to the decorative metals, uses four other metals: iridium, tungsten, indium, and palladium, and the silver content is 29.60 to 95.60 wt %, the copper content is 3.93 to 69.76 wt %, the content of each of the four metals is 0.01 to 0.10 wt %, for a total content of 0.07 to 0.20 wt %, and, in addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31 to 0.52 wt % and 0.01 to 0.05 wt %, respectively, and by setting the weight ratio of silver to copper to a number selected from the entire range of 92.00 to 94.00 and a number selected from the entire range of 5.00 to 7.00, the alloy for personal ornaments exhibits a white color.

2. An alloy for personal ornaments, which uses only silver and copper as decorative metals and, in addition to the decorative metals, uses four other metals: iridium, tungsten, indium, and palladium, and the silver content is 29.60 to 95.60 wt %, the copper content is 3.93 to 69.76 wt %, the content of each of the four metals is 0.01 to 0.10 wt %, for a total content of 0.07 to 0.20 wt %, and, in addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31 to 0.52 wt % and 0.01 to 0.05 wt %, respectively, and by setting the weight ratio of silver to copper to a number selected from the entire range of 94.50 to 96.00 and a number selected from the entire range of 3.00 to 4.50, the alloy for personal ornaments exhibits a silvery-white color.

3. An alloy for personal ornaments, which uses only silver and copper as decorative metals and, in addition to the decorative metals, uses four other metals: iridium, tungsten, indium, and palladium, the silver content being 29.60 to 95.60 wt %, the copper content being 3.93 to 69.76 wt %, the respective content ratios of the four metals being 0.01 to 0.10 wt %, for a total content ratio of 0.07 to 0.20 wt %, and, in addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31 to 0.52 wt % and 0.01 to 0.05 wt %, respectively, and by setting the weight ratio of silver to copper to a value selected from the entire range of 24.00 to 34.00 and a value selected from the entire range of 65.00 to 75.00, the alloy for personal ornaments exhibits a deep pink color.

4. An alloy for personal ornaments, which uses only silver and copper as decorative metals and, in addition to the decorative metals, uses four other metals: iridium, tungsten, indium, and palladium, the silver content being 29.60 to 95.60 wt %, the copper content being 3.93 to 69.76 wt %, the respective content ratios of the four metals being 0.01 to 0.10 wt %, for a total content ratio of 0.07 to 0.20 wt %, and, in addition to the decorative metals and the four metals, zinc and platinum are blended in at 0.31 to 0.52 wt % and 0.01 to 0.05 wt %, respectively, and by setting the weight ratio of silver to copper to a number selected from the entire range of 40.00 to 55.00 and a number selected from the entire range of 44.00 to 59.00, the alloy for personal ornaments exhibits a pale pink color.

5. 5. The alloy for jewelry according to claim 1, 2, 3 or 4, characterized in that the alloy for jewelry is in the form of a chain having fastening devices at both ends.

6. An alloy for jewelry as described in any one of claims 1, 2, 3, and 4, characterized in that it contains, as metals other than decorative metals, not only the four types of metals but also one or more of germanium and rhenium, each in a proportion of 0.01 to 1.00 weight percent.

7. A method for producing the alloy for jewelry according to any one of claims 1 to 4, comprising the following steps:

1. Preparation of a mixture of silver, copper, iridium, tungsten, indium, palladium, zinc, and platinum.

2. Casting the mixture of step 1 by heating.

3. Polishing in the following order: (1) Barrel polishing, in which protrusions on the surface of each casting are removed by colliding the castings with each other in a rotating container. (2) Intermediate polishing with a rotary tool having a textured surface. (3) Final polishing to achieve gloss with a rotary tool that does not have a textured surface.

8. 8. The method for producing an alloy for jewelry according to claim 7, wherein the temperature in the mixing step under vacuum is 1850°C, and the temperature in the casting step is 1100°C.