CN115522100B - Alloy for jewelry and jewelry comprising same - Google Patents
Alloy for jewelry and jewelry comprising same Download PDFInfo
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- CN115522100B CN115522100B CN202211209013.0A CN202211209013A CN115522100B CN 115522100 B CN115522100 B CN 115522100B CN 202211209013 A CN202211209013 A CN 202211209013A CN 115522100 B CN115522100 B CN 115522100B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/0084—Bracelets in the form of a ring, band or tube of rigid material
- A44C5/0092—Bracelets in the form of a ring, band or tube of rigid material essentially made from metal
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/02—Alloys based on gold
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of noble metal alloys, in particular to an alloy for jewelry and an ornament containing the alloy. The alloy consists of the following components: 18 to 22 weight percent of nickel, 0.3 to 0.7 weight percent of iron, 11 to 15 weight percent of zinc, and the balance of copper and unavoidable impurities. The alloy can be used as a joint coating material and is matched with noble metal taking gold as a main component to prepare ornaments so as to improve the ductility and the elasticity, so that the gold alloy can obtain more elastic deformation capability and can be processed into ornaments with finer shapes. Compared with the gold alloy prepared by adopting the traditional joint coating material, the product provided by the invention has lighter weight, better elastic effect, larger deformability amplitude and reduced processing difficulty.
Description
Technical Field
The invention relates to the technical field of noble metal alloys, in particular to an alloy for jewelry and an ornament containing the alloy.
Background
Gold for jewelry is usually expressed in terms of K or color, 24K is known as gold or gold, and the content is 99.99%.
Taking 18K gold as an example, common jewelry contains 75% gold, which is called 18K. About 25% of a piece of 18K gold jewelry is Ni, cu, zn, ag, etc. metals, and these other metals used to produce gold and gold are known in the jewelry industry as joint compound. The joint coating is closely related to the processing performance of the gold alloy.
The joint coating materials in jewelry industry in China mainly depend on import, because the production technology of some alloy joint coating is not solved yet. In addition, the joint used in the prior art has the problems of heavy weight and limited deformable range of the product, and the alloy added with the joint is not ideal in ductility and plastic deformation capacity, so that the joint is limited in processing and application, and the joint is difficult to prepare ornaments with high requirements on elastic properties.
Disclosure of Invention
A first object of the present invention is to provide an alloy consisting of the following components:
18 to 22 weight percent of nickel, 0.3 to 0.7 weight percent of iron, 11 to 15 weight percent of zinc, and the balance of copper and unavoidable impurities.
A second object of the invention is to provide a gold alloy comprising gold and an alloy as described above.
A third object of the present invention is to provide an ornament, at least part of which is made of the gold alloy as described above.
The fourth object of the present invention is to provide a method for manufacturing a bracelet, comprising:
a) Obtaining a gold alloy as described above and casting into an elongated metal strip;
b) After at least one line pressing and at least one annealing process treatment, the metal strip is pulled into a noble metal line;
c) Winding the noble metal wire into a ring shape;
d) And (5) annealing and shaping.
The alloy can be used as a joint coating material and is matched with noble metal taking gold as a main component to prepare ornaments so as to improve the ductility and the elasticity, so that the gold alloy can obtain more elastic deformation capability and can be processed into ornaments with finer shapes. Compared with the gold alloy prepared by adopting the traditional joint coating material, the product provided by the invention has lighter weight, better elastic effect, larger deformability amplitude and reduced processing difficulty.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a test flow of test 1 according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a test flow of test 2 according to an embodiment of the invention.
Detailed Description
Reference now will be made in detail to embodiments of the invention, one or more examples of which are described below. Each example is provided by way of explanation, not limitation, of the invention. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment.
Unless otherwise defined, all terms (including technical and scientific terms) used to describe the invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. By way of further guidance, the following definitions are used to better understand the teachings of the present invention. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms "comprising," "including," and "comprising," as used herein, are synonymous, inclusive or open-ended, and do not exclude additional, unrecited members, elements, or method steps.
In the present invention, unless otherwise specified, the percentage means mass percentage.
The recitation of numerical ranges by endpoints of the present invention includes all numbers and fractions subsumed within that range, as well as the recited endpoint.
Concentration values are referred to in this invention, the meaning of which includes fluctuations within a certain range. For example, it may fluctuate within a corresponding accuracy range. For example, 2%, may allow fluctuations within + -0.1%. For values that are larger or do not require finer control, it is also permissible for the meaning to include larger fluctuations. For example, 100mM, fluctuations in the range of.+ -. 1%,.+ -. 2%,.+ -. 5%, etc. can be tolerated.
In the present invention, the terms "plurality", and the like refer to, unless otherwise specified, 2 or more in number.
In the invention, the technical characteristics described in an open mode comprise a closed technical scheme composed of the listed characteristics and also comprise an open technical scheme comprising the listed characteristics.
In the present invention, "preferred", "better", "preferred" are merely embodiments or examples which are better described, and it should be understood that they do not limit the scope of the present invention. In the present invention, "optional" means optional or not, that is, means any one selected from two parallel schemes of "with" or "without". If multiple "alternatives" occur in a technical solution, if no particular description exists and there is no contradiction or mutual constraint, then each "alternative" is independent.
The invention relates to an alloy, which consists of the following components:
18 to 22 weight percent of nickel, 0.3 to 0.7 weight percent of iron, 11 to 15 weight percent of zinc, and the balance of copper and unavoidable impurities.
The alloy can be used as a joint coating material, and can be matched with noble metal taking gold as a main component to prepare ornaments so as to improve the ductility and the elasticity.
In some embodiments, the alloy consists of the following components:
19-21 wt% of nickel, 0.4-0.6 wt% of iron, 12-14 wt% of zinc and the balance of copper and unavoidable impurities.
In some embodiments, the alloy consists of the following components:
19.5 to 20.5 weight percent of nickel, 0.45 to 0.55 weight percent of iron, 12.5 to 13.5 weight percent of zinc, and the balance of copper and unavoidable impurities.
Preferably, the alloy consists of the following components: 20wt% of nickel, 0.50wt% of iron, 12.8wt% of zinc, and the balance of copper and unavoidable impurities.
Preferably, the alloy consists of the following components: 20.03wt% of nickel, 0.50wt% of iron, 12.81wt% of zinc, and the balance of copper and unavoidable impurities.
The invention also relates to a gold alloy comprising gold and an alloy as described above.
In some embodiments, the gold is present in an amount of 33wt% to 80wt% and the alloy is present in an amount of 20wt% to 67wt%.
In some embodiments, the gold is present in an amount of 75wt% to 76wt% and the alloy is present in an amount of 24wt% to 25wt%.
According to an extension of the invention, the gold content of the gold alloy may be 33wt% to 80wt%, such as 35wt%, 40wt%, 45wt%, 50wt%, 55wt%, 60wt%, 65wt%, 70wt%, 71wt%, 72wt%, 73wt%, 74wt%, 75wt%, 75.3wt%, 75.4wt%, 75.5wt%, 75.6wt%, 75.7wt%, 76wt%, 77wt%, 78wt%, 79wt%.
According to an extension of the invention, the alloy content in the gold alloy may be 20wt% to 67wt%, such as 21wt%, 22wt%, 23wt%, 24wt%, 24.3wt%, 24.4wt%, 24.5wt%, 24.6wt%, 24.7wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 35wt%, 40wt%, 45wt%, 50wt%, 55wt%, 60wt%, 65wt%.
The gold alloy may also be doped or undoped with some other metal (preferably a noble metal), such as one or more of silver, platinum, zinc, lead, tin. When other metals are present, it is preferred that the content of other metals is not more than 10wt%, or not more than 5wt%, or not more than 4wt%, or not more than 3wt%, or not more than 2wt%, or not more than 1wt%, or not more than 0.5wt%, or not more than 0.1wt%.
According to yet another aspect of the invention, it also relates to an ornament, at least part of the ornament being made of a gold alloy as described above.
The ornamental article may also comprise other ornamental materials, typically such as platinum, silver, precious stone, or alloys of other composition than the gold alloy defined in the present invention.
The gemstones defined in the present invention are broad and include natural mineral crystals such as diamond, crystal, emerald, ruby, sapphire and chrysomede (alexandrite, cat eye) green-curtain, etc.; there are also a few natural single mineral aggregates, such as Wu Lan knoop, opal. There are also a few organic materials such as amber, pearl, coral, coal essence, and are included in the broad sense of precious stones.
In the present invention, "jewelry" refers broadly to all items for decoration, typically jewelry and home furnishings, for example. Preferably jewelry, such as jewelry worn on the head, such as a hairpin, earring and the like; and ornaments worn on the body of the finger, such as necklaces, brooches, bracelets, rings, foot rings and the like. Because the gold alloy provided by the present invention has good elastic deformability, in some preferred embodiments, the jewelry has a ring formed around the gold alloy.
In the present invention, "ring" refers broadly to any geometric figure that is hollow, such as a polygonal ring, preferably a regular polygonal ring, more preferably a circular ring. The ring may be closed or notched, and when it is a neck ring, a hand ring, a foot ring or a finger ring, it is only required to be fastened to the neck/wrist/ankle/finger.
In some embodiments, the gold alloy is a solid or hollow noble metal wire.
The gold alloy provided by the invention can be used for processing finer noble metal wires while maintaining good elastic deformability due to the particularly significantly improved processability. In some embodiments, the noble metal wire has an outer diameter of 0.5mm to 1mm, e.g., 0.6mm, 0.7mm, 0.8mm, 0.9mm.
The "loop" may be formed by a noble wire wrapped (single convolutions in the same plane) or wound (convolutions one or more convolutions at an oblique angle), in some embodiments, the noble wire is wrapped to form a loop having a thickness of 1, 2, 3, 4, 5, 6 or more convolutions, preferably substantially parallel between each convolution. In other embodiments, a continuous noble metal wire forms a structural unit, and the ornament may comprise at least 2 such structural units, which may also be mechanically, preferably non-detachably, connected to each other on at least one end, preferably by an end piece. In particular they may be welded or glued to the end piece.
In some embodiments, the ring is a notched (single turn) ring (or ring segment).
In some embodiments, the ornament is a bracelet. In the present invention, a "bracelet" may be used interchangeably with a "bracelet".
Particularly, for the bracelet with the notch, the wearing mode usually needs to apply external force at the notch to increase the ring diameter, but the bracelet is easy to deform due to the operation, particularly the bracelet prepared by the thin noble metal wire, and the gold alloy provided by the invention can effectively solve the problem.
According to a further aspect of the invention, it also relates to a method for preparing a bracelet, comprising:
a) Obtaining a gold alloy as described above and casting into an elongated metal strip;
b) After at least one line pressing and at least one annealing process treatment, the metal strip is pulled into a noble metal line;
c) Winding the noble metal wire into a ring shape;
d) And (5) annealing and shaping.
The metal strip is an elongated shape, but is not limited to a cross section thereof, but is preferably a strip having a substantially circular cross section.
In some embodiments, the metal strip is a round strip having a diameter of 10mm to 14 mm.
In some embodiments, in step b), the annealing temperature is 580 ℃ to 680 ℃, e.g., 600 ℃, 610 ℃, 620 ℃, 630 ℃, 640 ℃, 650 ℃, 660 ℃.
In some embodiments, step b) comprises:
b 1 ) Pressing the metal strip into a first square line with the outer diameter of 2-3 mm, and annealing at 580-680 ℃ for 20-30 minutes;
b 2 ) Will b 1 Pressing the first square line obtained by treatment into a second square line with the thickness of 1 mm-1.2 mm, and annealing at the temperature of 580-680 ℃ for 20-30 minutes;
b 3 ) Will b 2 The second square wire obtained by treatment is pulled into a round wire with the outer diameter of 0.5-0.9 mm.
In some embodiments, step b 1 ) The annealing times of (2) were 21, 22, 23, 24, 25, 26, 27, 28, 29 minutes.
In some embodiments, the annealing temperature of step d) is 550 ℃ to 650 ℃ and the annealing time is 15 to 25 minutes.
The annealing temperature in step d) may be 560 ℃, 570 ℃,580 ℃, 590 ℃, 600 ℃, 610 ℃, 620 ℃, 630 ℃ and 640 ℃.
Embodiments of the present invention will be described in detail below with reference to examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples, in which specific conditions are not noted, are preferably referred to in the guidelines given in the present invention, and may be according to the experimental manuals or conventional conditions in the art, and may be referred to other experimental methods known in the art, or according to the conditions suggested by the manufacturer.
In the specific examples described below, the measurement parameters relating to the raw material components, unless otherwise specified, may have fine deviations within the accuracy of weighing. Temperature and time parameters are involved, allowing acceptable deviations from instrument testing accuracy or operational accuracy.
Example 1
The embodiment provides a preparation method of a golden bracelet.
The manufacturing flow is as follows:
(1) preparing gold: preparing a gold alloy containing 75.5% gold and 24.5% PLAST220 alloy;
the PLAST220 joint coating comprises the following components: nickel (Ni) =20.03%, iron (Fe) =0.50%, copper (Cu) =67.12%, zinc (Zn) =12.81%;
(2) melt Jin Zhu: casting into 12mm round bars by a continuous casting machine;
(3) and (3) line pressing: pressing a 12mm round bar into a 2.6mm square line;
(4) annealing: putting the square wire into a middle annealing furnace for an annealing process, wherein the annealing temperature is 630 ℃, and the annealing time is 25 minutes;
(5) and (3) line pressing: pressing the square line with the length of 2.6mm into a square line with the length of 1.1 mm;
(6) annealing: putting the square wire into a middle annealing furnace for an annealing process, wherein the annealing temperature is 630 ℃, and the annealing time is 25 minutes;
(7) and (3) pulling wires: pulling the square wire with the length of 1.1mm into a round wire with the length of 0.7mm by using a wire pulling machine;
(8) winding: a round wire with the diameter of 0.7mm is wound on the bracelet rod for fixation;
(9) annealing: and (3) putting the wound bracelet into an annealing furnace for an annealing process, wherein the annealing temperature is 600 ℃, and the annealing time is 20 minutes, so that the shaping is finished.
Example 2
The embodiment provides a preparation method of a golden bracelet.
The manufacturing flow is as follows:
(1) preparing gold: preparing a gold alloy containing 75.5% gold and 24.5% PLAST220 alloy;
the PLAST220 joint coating comprises the following components: nickel (Ni) =18.44%, iron (Fe) =0.65%, copper (Cu) = 66.71%, zinc (Zn) =14.20%;
(2) melt Jin Zhu: casting into round bars with the diameter of 13mm by a continuous casting machine;
(3) and (3) line pressing: pressing the 13mm round strip into a 3mm square line;
(4) annealing: putting the square wire into a middle annealing furnace for annealing at 580 ℃ for 30 minutes;
(5) and (3) line pressing: pressing the square line with the length of 2.6mm into a square line with the length of 1.1 mm;
(6) annealing: putting the square wire into a middle annealing furnace for annealing at 580 ℃ for 30 minutes;
(7) and (3) pulling wires: pulling the square 1.1mm wire into a round 1mm wire by using a wire pulling machine;
(8) winding: 1mm round wire is wound on the bracelet rod for fixation;
(9) annealing: and (3) putting the wound bracelet into an annealing furnace for an annealing process, wherein the annealing temperature is 550 ℃, and the annealing time is 25 minutes, so that the shaping is finished.
Example 3
The embodiment provides a preparation method of a golden bracelet.
The manufacturing flow is as follows:
(1) preparing gold: preparing a gold alloy containing 70% gold and 30% PLAST220 alloy filler;
the PLAST220 joint coating comprises the following components: nickel (Ni) =21.63%, iron (Fe) =0.33%, copper (Cu) =66.57%, zinc (Zn) =11.47%;
(2) melt Jin Zhu: casting into 12mm round bars by a continuous casting machine;
(3) and (3) line pressing: pressing a 12mm round bar into a 2.3mm square line;
(4) annealing: putting the square wire into a middle annealing furnace for annealing at 680 ℃ for 20 minutes;
(5) and (3) line pressing: pressing the square line with the length of 2.6mm into a square line with the length of 1.1 mm;
(6) annealing: putting the square wire into a middle annealing furnace for annealing at 680 ℃ for 30 minutes;
(7) and (3) pulling wires: pulling the square wire with the length of 1.1mm into a round wire with the length of 0.7mm by using a wire pulling machine;
(8) winding: a round wire with the diameter of 0.7mm is wound on the bracelet rod for fixation;
(9) annealing: and (3) putting the wound bracelet into an annealing furnace for an annealing process, wherein the annealing temperature is 650 ℃, and the annealing time is 15 minutes, so that the shaping is finished.
Example 4
The embodiment provides a preparation method of a golden bracelet.
The manufacturing flow is as follows:
(1) preparing gold: preparing a gold alloy containing 75.5% gold and 24.5% PLAST220 alloy;
the PLAST220 joint coating comprises the following components: nickel (Ni) =18.44%, iron (Fe) =0.65%, copper (Cu) = 66.71%, zinc (Zn) =14.20%;
(2) melt Jin Zhu: casting into a sheet with the thickness of 4mm and the width of 32mm by a continuous casting machine;
(3) and (3) line pressing: tabletting the sheet material with the thickness of 4mm and the width of 32mm into a cut piece with the thickness of 0.2mm and the width of 32mm by a tablet press;
(4) annealing: the sheet with the thickness of 0.2mm and the width of 3.1mm is put into a middle annealing furnace for annealing process, the annealing temperature is 620 ℃, and the annealing time is 6 minutes;
(5) and (3) winding a pipe: a sheet with the thickness of 0.2mm and the width of 3.1mm passes through a wire eye with the thickness of 1mm, and then a hollow tube with the thickness of 1mm is wound on a bracelet rod for molding by a bracelet molding machine;
(6) annealing: and (3) putting the wound bracelet into an annealing furnace for annealing at 600 ℃ for 20 minutes, and shaping.
Experimental example 1
Sample description:
sample a: the hollow pipe bracelet prepared in the embodiment 4 has the pipe diameter of 1mm, the bracelet diameter of 56mm and the opening of 1cm;
sample B: the solid elastic thread bracelet prepared in example 2 has a thread diameter of 1mm, a bracelet diameter of 56mm and an opening of 1cm
Test 1:
the left and right opening and closing test is carried out on the two types of handrings by using equipment, as shown in fig. 1, the two ends of the long axis of the sample handring are fixed at a testing instrument (Instron 2344 series 1000N, universal testing machine) (A in fig. 1), a distance a is set for stretching the sample (maximum opening and closing distance: 35mm opening and closing times: 200 times), and if the sample just cannot be restored to the original shape under the distance a (C in fig. 1), the limit displacement of the sample is recorded as a.
The test results are: the sample B limit displacement was 47.8mm and the sample a limit displacement was 33.6mm.
Test 2:
as shown in fig. 2, a in fig. 2 is a sample state, a bracelet is opened and closed longitudinally (front and back, B in fig. 2) and transversely (left and right, C in fig. 2) by two hands, and after the bracelet is fixed, a line is taken to be placed in the middle of the bracelet, a triangle is formed between the line and the bracelet, and if the opening and closing distance of the bracelet is D and the line length is L, the opening and closing angle at the moment can be obtained by using a sine theorem (D in fig. 2). From the experimental results, it can be seen that: under the transverse limit interval, the limit opening and closing of the elastic bracelet is 82 degrees, and the hollow pipe bracelet is 78 degrees; under the longitudinal limit interval, the limit opening and closing of the elastic bracelet is 158 degrees, and the hollow pipe bracelet is 156 degrees.
Experimental example 2
Conventional alloy materials were compared and examined for their elastic deformability by the same method as in experimental example 1.
Alloy data used in comparative examples
The same doping ratio of gold and the filler as in example 1 was used to obtain a gold alloy having a main metal content other than gold: 0.01 per mill of nameplate (Cr), 0.01 per mill of gold (Au), 0.02 per mill of iron (Fe), 36.72 per mill of copper (Cu), 130.91 per mill of zinc (Zn), 4.71 per mill of indium (In) and 827.30 per mill of silver (Ag).
Experimental tests of different alloys and production process flow:
sample description:
sample a: example 1 elastic thread, thread diameter 0.7mm, bracelet diameter 56mm, opening 1cm
Sample B: the elastic thread prepared by the conventional method is adopted in the comparative example, the thread diameter is 0.7mm, the bracelet diameter is 56mm, and the opening is 1cm.
Test 1:
the left and right opening and closing test is carried out on the two types of hand rings by using equipment, the limit displacement of the sample A is 50.2mm, and the limit displacement of the sample B is 30.4mm.
Test 2:
and testing the opening and closing angles by using a sine theorem. From the experimental results, it can be seen that: at the transverse limit spacing, the limit opening and closing of the sample A is 158 degrees, and the limit opening and closing of the sample B is 77 degrees; at the longitudinal limit spacing, sample a had a limit opening and closing of 142 ° and sample B had a limit opening and closing of 66 °.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. The scope of the invention is therefore intended to be covered by the appended claims, and the description and drawings may be interpreted in accordance with the contents of the claims.
Claims (16)
1. An alloy for use as a gold joint, consisting of the following components:
18 to 22 weight percent of nickel, 0.3 to 0.7 weight percent of iron, 11 to 15 weight percent of zinc, and the balance of copper and unavoidable impurities.
2. The alloy of claim 1, consisting of the following composition:
19-21 wt% of nickel, 0.4-0.6 wt% of iron, 12-14 wt% of zinc and the balance of copper and unavoidable impurities.
3. The alloy of claim 1, consisting of the following composition:
19.5 to 20.5 weight percent of nickel, 0.45 to 0.55 weight percent of iron, 12.5 to 13.5 weight percent of zinc, and the balance of copper and unavoidable impurities.
4. A gold alloy comprising gold and an alloy according to any one of claims 1 to 3.
5. The gold alloy of claim 4, wherein the gold content is 33wt% to 80wt%, and the alloy content is 20wt% to 67wt%.
6. The gold alloy of claim 5, wherein the gold is present in an amount of 75wt% to 76wt%, and the alloy is present in an amount of 24wt% to 25wt%.
7. An ornament, at least part of which is made of the gold alloy according to any one of claims 4 to 6.
8. The article of claim 7 having a ring formed around the gold alloy.
9. The article of claim 8, the gold alloy being a solid or hollow noble metal wire.
10. The article of claim 9, wherein the noble metal wire has an outer diameter of 0.5mm to 1mm.
11. The article of any one of claims 8-10, the ring being a notched ring.
12. The article according to any one of claims 7 to 10, which is a bracelet.
13. The preparation method of the bracelet comprises the following steps:
a) Obtaining the gold alloy of any one of claims 4-6 and casting into an elongated metal strip;
b) After at least one line pressing and at least one annealing process treatment, the metal strip is pulled into a noble metal line;
c) Winding the noble metal wire into a ring shape;
d) And (5) annealing and shaping.
14. The method for manufacturing a bracelet according to claim 13, wherein the metal strip is a round strip with a diameter of 10-14 mm.
15. The method for manufacturing a bracelet according to claim 14, step b) comprising:
b 1 ) Pressing the metal strip into a first square line with the length of 2 mm-3 mm, and annealing at the temperature of 580-680 ℃ for 20-30 minutes;
b 2 ) Will b 1 Pressing the first square line obtained by treatment into a second square line with the thickness of 1 mm-1.2 mm, and annealing at the temperature of 580-680 ℃ for 20-30 minutes;
b 3 ) Will b 2 The second square wire obtained by treatment is pulled into a round wire with the outer diameter of 0.5-0.9 mm.
16. The method for producing a bracelet according to any one of claims 13 to 15, wherein the annealing temperature in step d) is 550 to 650 ℃ and the annealing time is 15 to 25 minutes.
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| CN202211209013.0A CN115522100B (en) | 2022-09-30 | 2022-09-30 | Alloy for jewelry and jewelry comprising same |
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| CN202211209013.0A CN115522100B (en) | 2022-09-30 | 2022-09-30 | Alloy for jewelry and jewelry comprising same |
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| CN115522100B true CN115522100B (en) | 2023-06-27 |
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