Decorative alloy and its manufacturing method

Abstract

To provide an alloy structure having a decorative effect of exhibiting gold white while having a silvery luster without using gold, and a method for manufacturing the alloy. Solution: 4.0 to 40.0% by weight of zinc of Contains and copper as the remaining content. Brass and silver is used as an ornamental metal, and the ratio of (weight of silver) / (weight of brass) is set to 1 / 2 to 2, and Contains only zinc, copper, and silver In the alloy and the alloy with the decorative effect according to the above numerical limitations, platinum, palladium, tungsten, iridium, germanium, and antimony are blended in a proportion of 0.1 to 3.0% by weight for each metal, or a single or multiple components thereof; And contains only zinc, copper, silver and the above components The invention achieves this objective by means of an alloy and a method for producing the alloy with decorative effect, which comprises the following steps: 1. Preparation of a mixture of metals that constitute any of the above alloys. 2 Casting the mixture by heating. 3 Polishing of castings.

Description

[Technical Field]

[0001] The present invention is directed to an alloy with a decorative effect that exhibits a golden white color with a silvery luster, and a method for producing the same. [Background technology]

[0002] When nickel is mixed with brass, which is an alloy of copper and zinc, a golden-white alloy can be formed.

[0003] However, nickel has a very poor luster and is prone to discoloration due to oxidation.

[0004] It is well known that a mixture of gold and palladium gives a decorative alloy a golden white color.

[0005] However, both gold and palladium are expensive, and the drawback of high production costs is unavoidable.

[0006] Patent Document 1 discloses a configuration in which the decorative body 7 in the timepiece dial is made of stainless steel and has a golden white color (paragraph

[0047] ).

[0007] However, since such stainless steel is mainly composed of iron, its basic color is black, and it is impossible to achieve a clear golden white color. Moreover, in the case of the above-mentioned known techniques, since they do not contain silver, it is impossible to achieve a silver luster, that is, a golden white color with a white luster inherent to silver. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-089533 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention provides a silvery luster. , without using gold, The objective of the present invention is to provide an alloy composition with a golden-white decorative effect and a simple method for producing the alloy. [Means for solving the problem]

[0010] In order to solve the above problems, the basic configuration of the present invention is as follows. Basic composition (1): 4.0 to 40.0% by weight of zinc of Contains and copper as the remaining content. Brass and silver By using the decorative metal as silver and setting the ratio of (weight of silver) to (weight of brass) to 1 / 2 to 2, it shows a golden white color with a silvery luster, and Contains only zinc, copper, and silver Alloy with decorative effect. Basic composition (2): 4.0 to 40.0% by weight of zinc of Contains and copper as the remaining content. Brass and silver The decorative metal is mainly composed of the above, and the ratio of (weight of silver) / (weight of brass) is set to 1 / 2 to 2, thereby exhibiting a golden white color with a silvery luster, and containing 0.1 to 3.0 weight % of each of platinum, palladium, tungsten, iridium, germanium, and antimony, or a single or multiple components thereof; And contains only zinc, copper, silver and the above ingredients Alloy with decorative effect. Basic structure (3): A method for manufacturing an alloy with the decorative effect of basic structure (1) by the following steps. 1. Preparation of a mixture of silver and brass. 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. Basic structure (4): A method for manufacturing an alloy with the decorative effect of basic structure (2) by the following steps. 1. Preparation of mixtures of silver, brass and platinum, palladium, tungsten, iridium, germanium, and antimony, or one or more of these metals. 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]

[0011] The basic structures (1) and (2) are clearly different from the gold-white alloys of the prior art in that they exhibit a decorative effect of exhibiting a gold-white color with a silvery luster.

[0012] Furthermore, when the weight ratio of silver is made larger than that of brass, a sufficient corrosion resistance effect can be achieved. Furthermore, the economic cost can be reduced compared to when gold is used to provide a golden white color.

[0013] Furthermore, in the basic configurations (1) and (2), the degree of whiteness in the gold-white color can be increased by increasing the weight of silver or the weight of zinc in the brass. However, it is a natural consequence that the luster of silver can be fully realized by increasing the weight of silver rather than by increasing the weight of zinc.

[0014] The effects based on the specific features of the basic configurations (1) and (2) will be described later in accordance with the embodiments.

[0015] In the cases of basic configurations (3) and (4), it is possible to realize the production of an alloy with a very simple decorative effect in that electrolytic polishing, which is required in the production of ordinary alloys, is not required. DETAILED DESCRIPTION OF THE INVENTION

[0016] The basic structures (1) and (2) require that the brass contain 4.0 to 40.0% by weight of zinc. The reason for this is that a zinc content of 4.0% or more allows the brass to exhibit its characteristic golden color, and if the zinc content exceeds 40.0%, the copper and zinc form an α+β bond, resulting in a hardness that is not necessary for processing into decorative items.

[0017] The basic structures (1) and (2) require that the ratio of (weight of silver) to (weight of brass) be 1 / 2 to 2. The reason for this is that, due to such numerical requirements, Without using gold, The advantage is that it is possible to achieve both the luster of silver and a golden white color.

[0018] The basic structure (1) has a technical advantage in that it can achieve a golden white color with a silvery luster through a simple structure that uses only silver and brass as decorative metals.

[0019] In contrast, in the case of the basic configuration (2), it is possible to exhibit the characteristics of metals other than the main components of silver and brass.

[0020] Specifically, platinum can provide the effects of preventing corrosion and being easy to process.

[0021] Palladium prevents corrosion and also improves wear resistance by forming a solid solution with silver. Incidentally, it is well known that a solid solution of silver and palladium is used in dental treatment.

[0022] Tungsten improves the hardness of the alloy, and this effect is particularly noticeable when it coexists with copper, which is a component of brass. In the case of iridium, it is possible to exhibit corrosion resistance and wear resistance. Germanium not only contributes to ease of processing, but also has sulfuration resistance, and therefore can contribute to preventing the sulfuration of silver. Antimony has an antifriction function and can contribute to wear resistance.

[0023] The upper limit of each of the metal contents is set at 3.0% by weight, based on the realization of a golden white color with silver luster in the basic configuration (2).

[0024] In the case of the precious metals platinum and palladium, they usually exhibit a decorative effect due to their white luster, but even if they are mixed in at 3.0 wt%, since the content is orders of magnitude less than the content of silver and brass, it does not transform into a golden white with a silver luster of basic composition (2).

[0025] The reason why the lower limit of each metal is set at 0.1% by weight is that this is the minimum amount necessary to realize the specific action and effect of each metal.

[0026] In the basic configurations (1) and (2), an embodiment can be adopted in which the alloy with a decorative effect is an alloy for chain-shaped jewelry with fastening devices at both ends.

[0027] 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.

[0028] In such a case, if iridium and / or antimony is selected as a metal other than the main component in the basic structure (2), the degree of wear can be reduced.

[0029] The applications of the alloys with decorative effects of the basic structures (1) and (2) are not limited to jewelry only.

[0030] Specifically, an embodiment characterized by use in household goods, window frames, tableware, eyeglass frames, watch bands, or dental materials can be employed.

[0031] In the basic configuration (4), when iridium and / or antimony is selected as a metal other than the main component, the degree of wear is kept low, and polishing can be achieved in about half the time compared to the basic configuration (3).

[0032] In the basic configurations (3) and (4), an embodiment can be adopted in which the temperature in the mixing step is 1850°C and the temperature in the casting is 1100°C.

[0033] When heated to 1850°C, the melting point of all decorative metals is exceeded, and an extremely uniform mixed state can be quickly achieved.

[0034] Normally, the casting temperature for alloys is about 750°C, but by setting the temperature at 1100°C as described above, it is possible to achieve efficient casting in a short time.

[0035] The following will explain the present invention based on examples. [Example]

[0036] In Example 1, silver, copper, and zinc are blended in amounts of 47.1 wt %, 50.2 wt %, and 2.7 wt %, respectively, in accordance with the basic structure (1), and the blending ratio of zinc in brass is 5.1 wt %.

[0037] In this way, while the ratio of silver to brass is roughly equal, the weight percentage of zinc in the brass is relatively small and the weight percentage of copper is relatively large, resulting in a golden white color with a silvery luster and a deep gold color. [Example]

[0038] In Example 2, silver, copper, and zinc are blended in amounts of 49.8 wt %, 42.2 wt %, and 8.0 wt %, respectively, in accordance with the basic structure (1), and the blending ratio of zinc in brass is 15.9 wt %.

[0039] Thus, while the weight ratio of silver to brass is roughly equal, the proportion of zinc in the brass is greater than in Example 1, so Example 2 exhibits a golden white color with a silvery luster due to a lighter gold color than Example 1. [Example]

[0040] In Example 3, in accordance with the basic configuration (2), silver, copper, zinc, germanium, and platinum are blended in amounts of 47.0 wt%, 50.0 wt%, 2.7 wt%, 0.2 wt%, and 0.1 wt%, respectively, and the blending ratio of zinc in brass is 5.1 wt%.

[0041] In Example 3, the blending ratio of silver, copper, and zinc is very similar to that of Example 1, and therefore, like Example 1, the gold color is deep and golden white with a silvery luster.

[0042] Furthermore, the inclusion of germanium prevents the sulfurization of silver, while the inclusion of platinum provides the advantages of corrosion prevention and ease of processing. Furthermore, since the blending ratio of platinum is 0.1% by weight, it hardly contributes to the decorative effect. [Example]

[0043] In Example 4, in accordance with the basic structure (2), silver, copper, zinc, tungsten, antimony, and palladium are blended in amounts of 49.7 wt%, 42.1 wt%, 7.9 wt%, 0.1 wt%, 0.1 wt%, and 0.1 wt%, respectively, and the blending ratio of zinc in brass is 15.8 wt%.

[0044] In Example 4, the blending ratio of silver, copper, and zinc is very similar to that of Example 2, and therefore the product exhibits a similar state to Example 2. Compared to Example 3, the gold color is lighter and the product exhibits a golden white color with a silvery luster.

[0045] Furthermore, the coexistence of tungsten with copper increases the hardness of the alloy, which has a decorative effect, the inclusion of antimony provides wear resistance, and the inclusion of palladium prevents corrosion and forms a solid solution with silver, thereby improving wear resistance. [Example]

[0046] In Example 5, in accordance with the basic configuration (1), silver, copper, and zinc are blended in amounts of 33.3 wt%, 64.0 wt%, and 2.7 wt%, respectively, and the blending ratio of zinc in the brass is 4.0 wt%, with the weight ratio of copper being the maximum. As a result, Example 5 exhibits a deep golden white color.

[0047] In the case of Example 5, the ratio by weight of silver / weight of brass is 0.499, which is almost equal to the lower limit of 1 / 2, and therefore the degree of silver luster in Example 5 is the smallest. [Example]

[0048] In Example 6, in accordance with the basic structure (1), silver, copper, and zinc are blended in amounts of 66.6 wt %, 20.1 wt %, and 13.3 wt %, respectively, and the blending ratio of zinc in brass is the maximum value of 40.0 wt %. As a result, Example 6 exhibits a pale golden white color.

[0049] The ratio of silver weight to brass weight in Example 6 is 1.99, which is very similar to the maximum value of 2, and therefore Example 6 achieves the highest silver luster. [Example]

[0050] In Example 7, in accordance with the basic configuration (2), silver, copper, zinc, platinum, palladium, tungsten, iridium, germanium, and antimony are blended at 27.3 wt%, 52.5 wt%, 2.2 wt%, 3.0 wt%, 3.0 wt%, 3.0 wt%, 3.0 wt%, 3.0 wt%, and 3.0 wt%, respectively. The zinc blending ratio in brass is 4.0 wt%, and the ratio of silver weight to brass weight is very similar to the minimum value of 1 / 2, which is 0.499. As a result, as in Example 5, a deep golden white color is exhibited, but the silver luster is small.

[0051] However, since each of the six metals other than the decorative metals is contained at a maximum of 3.0% by weight, the effects of the six metals already explained in the embodiment section can be maximized. However, since the total content of the six metals is 18.0% by weight, the silver and brass have a certain influence on the degree of golden white color.

[0052] In Example 7, the maximum content of iridium and antimony provides wear resistance, making it possible to produce an alloy with an efficient decorative effect in the manufacturing process of basic configuration (4). [Example]

[0053] In Example 8, in accordance with the basic configuration (2), silver, copper, zinc, platinum, palladium, tungsten, iridium, germanium, and antimony are blended at 66.2 wt%, 20.0 wt%, 13.2 wt%, 0.1 wt%, 0.1 wt%, 0.1 wt%, 0.1 wt%, 0.1 wt%, and 0.1 wt%, respectively. The zinc blending ratio in brass is 40.0 wt%, and the ratio of silver weight to brass weight is 1.99, which is very similar to the maximum value of 2. As a result, Example 8 exhibits a pale golden white color with maximum silver luster in a similar manner to Example 6.

[0054] Furthermore, by including all six metals other than the decorative metal, the effects of each metal explained in the embodiment section can be exerted. However, since the content of the six metals is the minimum value of 0.1% by weight, the effect exerted by the six metals is small.

[0055] However, since the proportion of decorative metals is not affected, Example 8 has the advantage over Example 7 that the decorative effect is very unlikely to be affected by the six metals. [Industrial Applicability]

[0056] The present invention, which is based on the basic configurations (1), (2), (3), and (4), achieves a gold-white color with a silvery luster using relatively inexpensive raw materials. Moreover, by adjusting the ratio of copper to zinc and the ratio of silver to brass, the degree of silvery luster and the gold concentration of the gold-white color can be adjusted. Furthermore, an alloy with a decorative effect can be produced by a simple method without electrolytic polishing, and the industrial applicability is enormous.

Claims

1. The alloy contains 4.0 to 40.0% by weight of zinc, the remainder being copper, and silver as decorative metals, and the ratio of (weight of silver) / (weight of brass) is set to 1 / 2 to 2, thereby exhibiting a golden white color with a silver luster and providing decorative effects, and containing only zinc, copper, and silver.

2. An alloy with decorative effects that contains 4.0 to 40.0% by weight of zinc, the remainder being brass with copper and silver as the main components, and that exhibits a golden white color with a silvery luster by setting the ratio of (weight of silver) / (weight of brass) to 1 / 2 to 2, and that contains 0.1 to 3.0% by weight of each of platinum, palladium, tungsten, iridium, germanium, and antimony, or one or more of these components, and that contains only zinc, copper, silver, and the above components.

3. 3. The alloy with decorative effects according to claim 1, characterized in that the alloy with decorative effects is an alloy for chain-like jewelry with fastening devices at both ends.

4. The alloy with decorative effect according to any one of claims 1 and 2, characterized in that it is used for household goods, window frames, tableware, eyeglass frames, watch bands or dental materials.

5. 2. A method for producing the alloy with decorative effect according to claim 1 by the following steps:

1. Preparation of a mixture of silver and brass.

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.

6. 6. A method for producing an alloy with decorative effect according to claim 5, characterized in that the temperature of the mixing step is 1850°C and the temperature of the casting is 1100°C.

7. 3. A method for producing the alloy with decorative effect according to claim 2 by the following steps:

1. Preparation of mixtures of silver, brass and platinum, palladium, tungsten, iridium, germanium, and antimony, or one or more of these components.

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. A method for producing an alloy with decorative effect according to claim 7, characterized in that the temperature of the mixing step is 1850°C and the temperature of the casting is 1100°C.

9. 8. The method for producing an alloy with a decorative effect according to claim 7, characterized in that iridium and / or antimony are selected as the metals other than the main component.