JP2021188134A - Alloys, particularly precious metal alloys, semi-finished products made of such alloys, ornaments having at least one such semi-finished product, and methods for producing such semi-finished products - Google Patents

Abstract

To provide: alloys that do not limit the use for specific ornaments that require elastic properties; semi-finished products made of such alloys; ornaments having at least one such semi-finished product; and methods for producing such semi-finished products.SOLUTION: An alloy comprises at least 33 wt.% to at most 75.5 wt.% gold, at least 1.5 wt.% to at most 45 wt.% silver, at least 8 wt.% to at most 45 wt.% copper, and the remainder being zinc.SELECTED DRAWING: Figure 2

Description

The present invention relates to alloys, in particular precious metal alloys, semi-finished products made of such alloys, accessories having at least one such semi-finished product, and methods for manufacturing such semi-finished products.

The alloy is particularly a noble metal alloy and contains at least 33 wt.% (Mass%) of gold, and the gold alloy generally has high ductility. In particular, alloys generally react to shear stress with plastic deformation, but generally break when the applied stress increases. For this reason, there are restrictions on the use of such alloys for certain accessories that require particular elasticity. That is, it seems as if it is impossible to make elastic jewelry from alloys, especially from precious metal alloys containing at least 33 wt.% Gold, especially from gold alloys.

The present invention is based on the object of developing an alloy that does not have the above-mentioned disadvantages, a semi-finished product made of such an alloy, an accessory having at least one such semi-finished product, and a method for manufacturing such a semi-finished product.

This object is achieved by the technical teachings, in particular the independent claims and the teachings of the dependent claims and the specification according to the disclosed embodiments.

The purpose is, in particular, at least 33 wt.% And less than 75.5 wt.% Gold, at least 1.5 wt.% And less than 45 wt.% Silver, at least 8 wt.% And less than 45 wt.% Copper, and the balance. Achieved by developing an alloy composed of zinc. Surprisingly, it has been found that semi-finished products and especially elastic jewelery can be produced from such alloys. This forms semi-finished products and jewelery from gold-containing alloys and, conversely, contains gold in the production of elastic, especially at least elastically deformable semi-finished products and jewelery. It is possible to use an alloy. This expands the use of gold-containing alloys, while enabling the production of gold, i.e., gold-based accessories with specific elasticity.

In particular, the mass fraction of each specified composition, including the balance zinc, totals 100 wt.%.

The expression "residual zinc" in the scope of the technical teachings proposed herein refers to an alloy being 100 wt.% With respect to the constituents of the alloy, in particular in a predetermined range of mass fraction, i.e., identified by a predetermined mass fraction. It means that the composition lacking to satisfy is composed of the zinc component. According to one embodiment, the zinc component is pure zinc, and according to another embodiment, the zinc component is composed of impurities which are particularly unavoidable, particularly zinc having a trace amount of impurities.

In the developed form of the present invention, the alloy is said to have a copper content of at least 9 wt.% And 42 wt.% Or less, preferably at least 17 wt.% And 27 wt.% Or less.

Preferably, the copper content is 40 wt.% Or less, preferably 35 wt.% Or less, preferably 30 wt.% Or less, preferably 25 wt.% Or less, preferably 20 wt.% Or less, preferably at least 10 wt. .%, preferably at least 15 wt.%, preferably at least 18 wt.%, preferably at least 16 wt.% And 21.5 wt.% Or less, preferably at least 19 wt.% And 21 wt.% Or less, preferably. At least 19.6 wt.% And less than 20.6 wt.%.

In a further development of the invention, the alloy has a silver content of at least 2.5 wt.% Of 39 wt.% Or less, preferably at least 3.5 wt.% Of 27.5 wt.% Or less.

Preferably, the silver content is 40 wt.% Or less, preferably 35 wt.% Or less, preferably 30 wt.% Or less, preferably 25 wt.% Or less, preferably 20 wt.% Or less, preferably 15 wt. % Or less, preferably 10 wt.% Or less, preferably 5 wt.% Or less, preferably 4 wt.% Or less, preferably at least 2 wt.%, preferably at least 3 wt.%, preferably at least 5 wt.% , Preferably at least 10 wt.%, preferably at least 15 wt.%, preferably at least 3.8 wt.% Of 4.2 wt.% Or less, preferably at least 3.9 wt.% And 4.1 wt.% Or less. Is.

Preferably, the gold content of the alloy is at least 33.3 wt.% And less than or equal to 75.5 wt.%, preferably at least 40 wt.%, preferably at least 45 wt.%, preferably at least 50 wt.%, Preferably. , At least 55 wt.%, preferably at least 60 wt.%, preferably at least 65 wt.%, preferably at least 70 wt.% And 75.3 wt.% Or less, preferably at least 75 wt.% And 75.1 wt.% It is as follows.

The alloy is preferably at least 70 wt.% And less than 75.5 wt.% Gold, at least 2.7 wt.% And less than 4.2 wt.% Silver, and at least 16 wt.% And less than 21.5 wt.% Copper. It is composed of the balance zinc.

The alloy is preferably at least 75 wt.% And less than 75.1 wt.% Gold, at least 3.7 wt.% And less than 4.0 wt.% Silver, at least 19 wt.% And less than 21 wt.% Copper, and the balance zinc. Consists of.

Preferably, the alloy is at least 75 wt.% And no more than 75.1 wt.% Gold, preferably at least 3.1 wt.% And less than 4.0 wt.% Silver, preferably at least 19.6 wt.% To 21. It is composed of .6 wt.% Copper and the balance zinc.

Preferably, the alloy is composed of 75 wt.% Gold, 4.3 wt.% Silver, 20 wt.% Copper and the balance zinc.

The alloy is preferably composed of 75.1 wt.% Gold, 4.0 wt.% Silver, 20.6 wt.% Copper and the balance zinc.

The alloy is preferably composed of 75.5 wt.% Gold, 2.1 wt.% Silver, 22 wt.% Copper and the balance zinc.

Preferably, the alloy is composed of 75 wt.% Gold, 1.7 wt.% Silver, 23 wt.% Copper and the balance zinc.

This object is also achieved by the development of semi-finished products having alloys according to the present invention or alloys according to any of the above embodiments. Preferably, the semi-finished product is made from such an alloy. The semi-finished product has the shape of a tube with a slot. Such semi-finished products are advantageously elastic, especially when stressed perpendicular to the longitudinal extension of the slotted tube. In addition, such a semi-finished product having a tube shape with a slot is also called a "hinge".

In a further development of the invention, the semi-finished product is provided by being formed from a sheet metal extending in a first direction. This first direction corresponds specifically to the direction of the longest portion of the semi-finished product, which is the slotted tube, and thus is the longitudinal direction of the slotted tube. The sheet metal is preferably bent in a second direction perpendicular to the first direction (the second direction extends in the plane formed by the surface of the sheet metal) and is circular, especially circular. It is molded into an arc shape. In particular, the tube with slot is molded in this way. The slot is formed by providing both ends of the sheet metal at a finite distance from each other along a virtual circular line, the tube of which is not a closed circular cross section, but rather an arcuate cross section, i.e. a partially open slot. Has a shape. The cut surface of the semi-finished product is a plane perpendicular to the longitudinal direction.

The sheet metal preferably forms the shape of an annulus piece, especially by being squeezed through a round drawing die.

The semi-finished product designed in this manner preferably has an outer diameter of at least 0.3 mm and 5.0 mm or less, preferably at least 0.5 mm and 1.5 mm or less, and preferably 0.9 mm and 1. It is 3 mm or less, preferably at least 0.99 mm and 1.2 mm or less.

Semi-finished products in the form of slotted tubes preferably have an inner diameter of at least 0.03 mm and 4.5 mm or less, preferably 0.4 mm to 3 mm, preferably at least 0.55 mm and 0.76 mm or less. ..

The minimum spacing between the ends of the sheet metal bent towards each other in the slot region is preferably at least 0.02 mm and 1.0 mm or less, preferably at least 0.04 mm and 0.08 mm or less. Is 0.06 mm.

In a preferred embodiment of the semi-finished product, it has an outer diameter of 1.2 mm, an inner diameter of 0.76 mm and a minimum spacing of 0.06 mm in the slot region.

In another preferred embodiment of the semi-finished product, it has an outer diameter of 0.99 mm, an inner diameter of 0.55 mm and a minimum spacing of 0.06 mm in the slot area.

In a further development of the invention, the semi-finished product is measured at a distance of 15 mm from the clamp, especially when a force is applied at a speed of 0.1 mm / s by a pressure piece, preferably at least 1500 N / m and 2200 N / m or less. Has a spring constant of at least 1600 N / m and 2100 N / m or less, preferably at least 1700 N / m and 2050 N / m or less. The spring constant is 1964 N / m when the slot is arranged and clamped in the direction of the acting force, and 2025 N / m when the slot is arranged and clamped in the direction opposite to the acting force, especially perpendicular to the acting force. When the slot is oriented and clamped, it is 1720 N / m. In such a semi-finished product, it is possible to particularly measure the value corresponding to the spring constant, and the semi-finished product formed by this manufacturing method, particularly the semi-finished product formed within the range of the manufacturing method defined below. Will be demonstrable to have elasticity. In particular, it is used for semi-finished products having alloys composed of 75.1 wt.% Gold, 4.0 wt.% Silver, 20.6 wt.% Copper, and zinc balance, and can measure specific values for a given clamping. be. Among the conventional gold alloys clamped as samples correspondingly, those having a gold content of 75 wt.% Obtained spring constants of 1106 N / m before curing and 1008 N / m after curing. Also, in a properly clamped spring steel sample, a spring constant of 3958 N / m was obtained. It can be seen that the alloy semi-finished product proposed herein thus has a spring constant that significantly increases in the direction of the spring steel as compared to conventional gold alloys.

An object of the present invention is to make at least one semi-finished product according to the present invention, which is wound at least partially in the longitudinal direction, that is, along the first direction, or one of the above-described embodiments in the development of jewelry. It is also achieved by having at least one such semi-finished product. In this way, elastic accessories are advantageously provided, in particular with gold-containing alloys or made from gold alloys.

The semi-finished product is thus wound, especially along the longitudinal direction of the slotted tube.

The semi-finished product is preferably spirally wound along the first direction. Thus, it can have a particularly spiral spring-like appearance.

Further developments of the present invention provide accessories having at least two semi-finished products, each wound in the longitudinal direction, i.e., parallel to each other along a first direction. In particular, the semi-finished products are arranged adjacent to each other along their entire length, i.e., in particular extending parallel to each other along a spiral. Thus, the accessory preferably has a plurality of spiral strands, particularly double strands, formed from at least two semi-finished products. Each semi-finished product is mechanically, preferably at least one at both ends, preferably connected to each other via an end piece so as not to separate. In particular, it can be welded or glued to the end piece. Particularly preferably, the jewelery has such end pieces at both ends of the semi-finished product.

Preferably, the accessory can have exactly one semi-finished product wound along the first direction. According to an alternative embodiment, the jewelery has exactly two semi-finished products that are wound parallel to each other in the first direction. However, according to another preferred embodiment, the jewelery may also have more than one, or more than two, semi-finished products that are wound parallel to each other in the first direction. In particular, jewelery can have three such semi-finished products, four such semi-finished products, five such semi-finished products, or even more than five such semi-finished products.

In a further development of the invention, at least one semi-finished piece of jewelry is around it, i.e., in the circumferential direction, with noble metal wires, especially gold wires, platinum wires or other noble metal wires, especially gold or platinum wires. It is provided by being wrapped. Preferably, the semi-finished product is completely wound with the precious metal wire along its longitudinal length, especially in a spiral. Preferably, the semi-finished product is tightly spirally wound around the semi-finished product, especially with precious metal wire. As such, the semi-finished product is completely obscured by the precious metal wire, i.e., particularly completely contained. In this way, it is possible to give a noble impression to the jewelry.

The semi-finished product of at least two accessories is preferably wrapped with a precious metal wire around it.

The jewelery preferably has at least one socket at one end for use in at least one jewel. In particular, at least one end piece is preferably designed as such a stone clasp for one or more gems. The jewelery preferably has such stone clasps at both ends of at least one semi-finished product, especially as end pieces, for at least one gem.

In an advanced form of the invention, the accessory is provided by being designed as a bracelet. Its elastic design allows the jewelery to be placed around the arm, especially around the forearm, especially around the wrist, in a particularly simple and sophisticated style.

This object is also achieved by developing a method for manufacturing a semi-finished product according to the present invention or a semi-finished product according to one of the above-described embodiments. The method consists of the following steps. A sheet metal made of an alloy according to the present invention or an alloy according to one of the above-described embodiments extending in the first direction is prepared. The sheet metal is molded into a tube with a slot. The slotted tube is cured at a specific curing temperature for a specific curing time. The specific curing temperature is at least 100 ° C to 400 ° C or less, preferably at least 250 ° C to 300 ° C or less, preferably at least 270 ° C to 290 ° C or less, preferably 270 ° C or less, preferably 270 ° C or less. Is in the range of 275 ° C, preferably 280 ° C, preferably 285 ° C, preferably 290 ° C. The specific curing time is at least 2 hours and 8 hours or less, preferably at least 3 hours and 7 hours or less, preferably at least 4 hours and 6 hours or less, preferably 2 hours, preferably 2.5 hours. Time, preferably 3 hours, preferably 3.5 hours, preferably 4 hours, preferably 4.5 hours, preferably 5 hours, preferably 5.5 hours, preferably 6 hours. It is a range.

The curing temperature is preferably 270 ° C., and the curing time is 6 hours. The curing temperature is preferably 280 ° C., and the curing time is 4 hours. The curing temperature is preferably 285 ° C., and the curing time is 3.5 hours. The curing temperature is preferably 290 ° C, and the curing time is 3 hours. The curing temperature is preferably 300 ° C., and the curing time is 2.5 hours.

The stretched sheet metal is prepared, the sheet metal is remolded into a slotted tube, and finally the slotted tube is cured to finally obtain a semi-finished product.

Sheet metal is provided, in particular by casting molten alloys followed by rolling.

In particular, sheet metal is squeezed through a round drawing die to form a tubular with slots.

Semi-finished products made of gold-containing alloys or elastic gold alloys can be advantageously obtained within the scope of the present manufacturing method.

In a further development of the invention, the semi-finished product is provided by being spirally wound along a first direction. In particular, jewelry is obtained in this way. It is spirally wound along a first direction, preferably at least two, preferably exactly two, or even more than two semi-finished products, swirling adjacent to each other, especially parallel to each other. Arranged like this. In this way you get the jewelry.

In a further development of the invention, the semi-finished product is wound around it, i.e., in the circumferential direction, by a noble metal wire, in particular a gold or platinum wire, or another noble metal wire, in particular a gold or platinum wire. Provided by.

Preferably, at least two parallel semi-finished products are wrapped with precious metal wires. Alternatively, the semi-finished product is preferably individually wound with precious metal wires one by one in the circumferential direction. Subsequently, the semi-finished products are spirally wound parallel to each other.

At least two semi-finished products that are wound parallel to each other are preferably at least one of their ends, particularly via an end piece, preferably via a stone clasp used for at least one gem. It is mechanically connected. Preferably, the semi-finished products are connected to each other by end pieces at both ends, in particular by sockets for at least one gem.

Especially in this way, an accessory, preferably a bracelet, is obtained.

The present invention will be described in detail below with reference to the drawings. In the illustrated example,
It is a schematic sectional view of embodiment of a semi-finished product. An embodiment of an accessory is shown.

FIG. 1 is a schematic cross-sectional view of an embodiment of Semi-Product 1. The semi-finished product has the shape of a slotted tube 2 extending along a longitudinal direction perpendicular to the plane of the drawing of FIG. The longitudinal direction is also referred to as the "first direction". The semi-finished product 1 is formed of a sheet metal (metal thin plate) 3 extending in the first direction, that is, in the longitudinal direction, so as to be circular, particularly arcuate, in the second direction perpendicular to the first direction. It is preferably formed by drawing the sheet metal 3 from a round drawing die.

Semi-finished products are composed of alloys. The alloy is particularly composed of at least 33 wt.% And less than 75.5 wt.% Gold, 1.5 wt.% And less than 45 wt.% Silver, at least 8 wt.% And less than 45 wt.% Copper, and the balance zinc. ..

The copper content of the alloy is preferably at least 9 wt.% And 42 wt.% Or less, preferably at least 17 wt.% And 27 wt.% Or less.

The silver content of the alloy is preferably at least 2.5 wt.% And 39 wt.% Or less, and preferably at least 3.5 wt.% And 27.5 wt.% Or less.

The semi-finished product 1 preferably has an outer diameter D1 of at least 0.3 mm and 5.0 mm or less. The inner diameter D2 of the semi-finished product 1 is preferably at least 0.03 mm and 4.5 mm or less. The minimum distance A of the slot region of the semi-finished product 1 is preferably at least 0.02 mm and 1.0 mm or less.

The semi-finished product 1 has a spring constant measured perpendicular to the longitudinal direction, preferably at least 1500 N / m and 2200 N / m or less, preferably at least 1600 N / m and 2100 N / m or less. In particular, the spring constant measured at a distance of 15 mm from the clamp is preferably at least 1700 N / m and 2050 N / m or less.

The semi-finished product 1 is preferably produced by preparing an elongated sheet metal 3 made of an alloy, particularly by casting and rolling. Subsequently, the sheet metal is formed in the slotted tube 2 by drawing, in particular, from a round drawing die. Subsequently, the tube with slot 2 is preferably cured at a curing temperature of at least 100 ° C and 400 ° C or less for at least 2 hours and a curing time of 8 hours or less. In this way, the semi-finished product 1 is finally obtained.

The semi-finished product 1 is preferably spirally wound so as to obtain jewelry in particular. The semi-finished product 1 is preferably a noble metal wire, particularly a gold wire or a platinum wire, or another noble metal wire, particularly a gold wire or platinum, in the circumferential direction, that is, in the direction of the arrow P in FIG. 1 or the opposite direction thereof. The wire is wound.

FIG. 2 is an embodiment of the accessory 5 showing that the accessory 5 has at least one semi-finished product 1 of FIG. 1 wound in a region along a first direction. In particular, in this case, the accessory 5 has two such semi-finished products 1, each of which is wound parallel to each other along the longitudinal direction. In particular, the semi-finished product 1 is spirally wound to form a double strand. However, in another embodiment, the jewelery 5 is exactly one semi-finished product 1 wound along the first direction, or half wound parallel to each other along the longitudinal direction. It is also possible to have more than two products 1.

Further, in FIG. 2, since the precious metal wire 7 is wound around the semi-finished product 1, it can be seen that the actual semi-finished product 1 can no longer be seen from the outside.

It is preferred that at least one end of the semi-finished product 1 is an end piece 9 and does not look like a stone clasp for at least one gem. In particular, the two semi-finished products 1 are mechanically connected to the end piece 9, preferably by welding or gluing.

In a preferred embodiment, each semi-finished product 1 has such end pieces 9 at both ends thereof.

The accessory 5 is specifically designed as a bracelet 11.

Claims (13)

It ’s an alloy,
At least 33 wt.% And less than 75.5 wt.% Gold,
At least 1.5 wt.% And less than 45 wt.% Silver,
At least 8 wt.% And less than 45 wt.% Copper,
With the balance zinc,
An alloy composed of. The alloy according to claim 1, wherein the alloy has a copper content of at least 9 wt.% And 42 wt.% Or less, preferably at least 17 wt.% And 27 wt.% Or less. The alloy according to claim 1 or 2, wherein the alloy has a silver content of at least 2.5 wt.% And 39 wt.% Or less, preferably at least 3.5 wt.% And 27.5 wt.% Or less. A semi-finished product (1) in the shape of a tube with a slot (2), which comprises the alloy according to any one of claims 1 to 3. The semi-finished product (1) is formed of a sheet metal (3) extending in a first direction, and is formed in a circular shape, particularly an arc shape, in a second direction perpendicular to the first direction. , The semi-finished product (1) according to claim 4. The semi-finished product (1) is particularly measured at a distance of 15 mm from the clamp and is at least 1500 N / m and 2200 N / m or less, preferably at least 1600 N / m and 2100 N / m or less, preferably at least 1700 N / m and 2050 N. The semi-finished product (1) according to claim 4 or 5, which has a spring constant of / m or less. Accessory (5)
An accessory (5) comprising at least one semi-finished product (1) according to any one of claims 4 to 6, which is at least partially wound along the longitudinal direction. The accessory (5) according to claim 7, wherein the accessory (5) has at least two semi-finished products (1) wound in parallel with each other along the longitudinal direction. The accessory (5) according to claim 7 or 8, wherein the precious metal wire (7) is wound around the at least one semi-finished product (1) of the accessory (5). The accessory (5) according to any one of claims 7 to 9, wherein the accessory (5) is designed as a bracelet (11). The method for manufacturing a semi-finished product (1) according to any one of claims 4 to 6.
The step of preparing the alloy sheet metal (3) according to any one of claims 1 to 3, which extends in the first direction, and
A step of forming the sheet metal (3) into a tube with a slot (2), and
A step of curing the tube with slot (2) at a specific curing temperature of at least 100 ° C and 400 ° C or less for a specific curing time of at least 2 hours and 8 hours or less.
The process of obtaining the semi-finished product (1) and
A manufacturing method. The manufacturing method according to claim 11, wherein the semi-finished product (1) is spirally wound along the first direction. The manufacturing method according to any one of claims 11 or 12, wherein the semi-finished product (1) has a precious metal wire (7) wound around the semi-finished product (1).

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