CN113621841A - Purple alloy and preparation method and ornament thereof - Google Patents
Purple alloy and preparation method and ornament thereof Download PDFInfo
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- CN113621841A CN113621841A CN202110846678.1A CN202110846678A CN113621841A CN 113621841 A CN113621841 A CN 113621841A CN 202110846678 A CN202110846678 A CN 202110846678A CN 113621841 A CN113621841 A CN 113621841A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
- A44C27/003—Metallic alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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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Abstract
The application belongs to the technical field of alloys, and particularly relates to a purple alloy, a preparation method thereof and an ornament. The preparation method of the purple alloy comprises the following steps: mixing 20-30 parts of aluminum and 0.1-3 parts of titanium, and then carrying out melting treatment to obtain an intermediate alloy; melting 67-79.9 parts of gold, and then mixing and melting the gold and the intermediate alloy to form a gold ingot; and sequentially carrying out reverse die forming treatment and annealing treatment on the gold ingot to obtain the purple alloy. The preparation method of the purple alloy effectively avoids aluminum segregation, guarantees the fluidity and uniformity of the alloy, and enables the surface of the purple alloy to be smoother and brighter, and the color to be uniform and full. Meanwhile, the hardness of the purple alloy is improved, the fatigue resistance of the purple alloy is improved, the brittleness of the alloy is reduced, the surface of the alloy is smooth and compact, fine lines are reduced, and the processing performance is improved; and enhances the corrosion resistance of the alloy.
Description
Technical Field
The application belongs to the technical field of alloys, and particularly relates to a purple alloy, a preparation method thereof and an ornament.
Background
The color gold jewelry is a color K gold jewelry which is smelted and processed by utilizing a color separation electroplating process or a mode of alloying gold and other metals. The purple alloy is an alloy with gold and aluminum as main components, usually gold is used as a raw material, aluminum is used as an intermediate alloy, and the purple alloy with various shapes is cast by the gold and the aluminum according to a certain proportion under the protection of inert gas in a gold melting furnace, so that the color gold jewelry material with potential utilization value is obtained. Because of the atomic structural form of AuAl2The intermetallic compound, which is an intermetallic compound, has high hardness and very poor mechanical properties, and particularly, a jewelry sample obtained by a traditional jewelry material processing mode, namely a smelting and casting mode, has very high brittleness and poor ductility. When the sample falls to the floor at a height of 1.5 meters, there is a high chance that the sample will be damaged by impact. In the processing process, the brittleness of the intermetallic compound often causes the jewelry to crack or break, and the jewelry is extremely difficult to process, so that the popularization of the purple alloy to the actual jewelry application market is greatly limited.
Currently, purple alloy jewelry has several disadvantages: purple is not pure enough, purple alloy jewelry on the market is light purple, the surface has light white texture, and the color is easy to dim under harsh conditions such as salt water, sulfide and the like; secondly, the gold quality is poor, compared with other color alloy ornaments, the purple alloy ornament has a small amount of sand holes on the surface, is rough in gold quality, lacks the fineness and the smoothness of the ornament, and is not bright enough in metallic luster; thirdly, the production process conditions are harsh, and in the prior art, the annealing time is generally dozens of hours to ensure the glossiness and the ductility of the purple alloy; fourthly, the corrosion resistance is poor, and the purple color of the general purple alloy jewelry can be dull and even faded after the general purple alloy jewelry is used for a period of time.
Disclosure of Invention
The application aims to provide a purple alloy, a preparation method thereof and an ornament, and aims to solve the problems of poor color and luster, poor corrosion resistance and harsh production process conditions of the existing purple alloy to a certain extent.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides a method for preparing a violet alloy, comprising the steps of:
mixing 20-30 parts of aluminum and 0.1-3 parts of titanium, and then carrying out melting treatment to obtain an intermediate alloy;
melting 67-79.9 parts of gold, and then mixing and melting the gold and the intermediate alloy to form a gold ingot;
and sequentially carrying out reverse die forming treatment and annealing treatment on the gold ingot to obtain the purple alloy.
Further, the weight fraction of the titanium is 0.8-1.5 parts.
Further, the step of melt processing comprises: and after mixing the aluminum and the titanium, melting and mixing the aluminum and the titanium in an inert atmosphere at the temperature of 1000-1100 ℃ to form the intermediate alloy.
Further, the melting conditions of the gold are as follows: and melting the gold in an inert atmosphere at the temperature of 900-1100 ℃.
Further, the step of hybrid melt processing comprises: and mixing the molten gold and the intermediate alloy, and then melting and mixing the gold and the intermediate alloy in an inert atmosphere at the temperature of 1000-1100 ℃ to form the gold ingot.
Further, the step of the reverse mold forming process includes: under the conditions that the vacuum pressure is 2.0 KPa-3.0 KPa and the temperature is 1030-1250 ℃, melting the gold ingot, and then performing reverse molding to form a crude blank.
Further, the annealing treatment step includes: and preserving the heat of the rough blank subjected to the reverse die forming for 3-5 hours at the temperature of 350-650 ℃ in an inert atmosphere.
In a second aspect, the present application provides a purple alloy, which is characterized by comprising the following metal raw materials by mass percentage, with the total mass of the purple alloy being 100%:
20 to 30 percent of aluminum,
0.1 to 3% of titanium,
67-79.9% of gold.
Further, the titanium accounts for 0.8-1.5% by mass.
Further, the purple alloy comprises the following metal raw materials in percentage by mass with the total mass of the purple alloy as 100 percent: 75% of gold, 1.25% of titanium and 23.75% of aluminum;
or 75% of gold, 0.8% of titanium and 24.2% of aluminum;
alternatively, gold 75%, titanium 1.5% and aluminum 23.5%.
In a third aspect, the present application provides an ornament, wherein the ornament is made of the purple alloy prepared by the above method, or the purple alloy.
According to the preparation method of the purple alloy, aluminum and titanium are melted firstly to form the intermediate alloy, and then the intermediate alloy is mixed with gold for melting treatment, so that the segregation of aluminum is effectively avoided, the fluidity and uniformity of the alloy are ensured, and the surface of the purple alloy is smoother and brighter. Moreover, through the reverse die forming treatment and the annealing treatment, the purple color of the alloy is brighter, and the hardness of the alloy is improved. In addition, a titanium metal element is added to the formula, and TiAu is dispersed and precipitated through gold and titanium4Thereby achieving the purpose of strengthening the alloy, improving the hardness of the purple alloy and greatly improving the purpleThe fatigue resistance of the alloy reduces the brittleness of the alloy, so that the surface of the alloy is smooth and compact, fine lines are reduced, and the processing performance is improved; meanwhile, the corrosion resistance of the alloy is enhanced, the color of the alloy is not influenced, and the alloy is kept uniform and full purple.
In the purple alloy provided by the second aspect of the application, 0.1-3% of titanium metal is added in the formula, and TiAu is precipitated by dispersion of gold and titanium4The aim of strengthening the alloy is fulfilled, the hardness of the purple alloy is improved, the fatigue resistance of the purple alloy is greatly improved, the brittleness of the alloy is reduced, the surface of the alloy is smooth and compact, fine lines are reduced, and the processing performance is improved; meanwhile, the corrosion resistance of the alloy is enhanced, the color of the alloy is not influenced, and the alloy is kept uniform and full purple.
According to the ornament provided by the third aspect of the application, due to the adoption of the purple alloy, the alloy is smooth and bright in surface, uniform and full in color, good in alloy texture, strong in corrosion resistance and good in color stability, the durability of the ornament is improved, and the ornamental value of the ornament is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a diagram of the appearance of a purple alloy jewelry provided in example 1 of the present application;
FIG. 2 is a diagram of the morphology of the purple alloy jewelry provided in example 2 of the present application;
FIG. 3 is a schematic diagram of a purple alloy jewelry item provided in example 3 of the present application;
FIG. 4 is a schematic diagram of a purple alloy jewelry item provided in example 4 of the present application;
FIG. 5 is a morphology of the purple alloy jewelry provided in comparative example 1 of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (one) of a, b, or c," or "at least one (one) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass in the description of the embodiments of the present application may be in units of mass known in the chemical industry, such as μ g, mg, g, and kg.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In a first aspect of the embodiments of the present application, a method for preparing a violet alloy is provided, which includes the following steps:
s10, mixing 20-30 parts of aluminum and 0.1-3 parts of titanium, and then carrying out melting treatment to obtain an intermediate alloy;
s20, melting 67-79.9 parts of gold, and then mixing and melting the gold and the intermediate alloy to form a gold ingot;
and S30, sequentially carrying out reverse mold forming treatment and annealing treatment on the gold ingot to obtain the purple alloy.
According to the preparation method of the purple alloy provided by the first aspect of the embodiment of the application, aluminum and titanium are firstly subjected to melting treatment to form the intermediate alloy, and then the intermediate alloy is mixed with gold for melting treatment, so that the segregation of aluminum is effectively avoided, the fluidity and uniformity of the alloy are ensured, and the surface of the purple alloy is smoother and brighter. Moreover, through the reverse die forming treatment and the annealing treatment, the purple color of the alloy is brighter, and the hardness of the alloy is improved. In addition, a titanium metal element is added to the formula, and TiAu is dispersed and precipitated through gold and titanium4The aim of strengthening the alloy is fulfilled, the hardness of the purple alloy is improved, the fatigue resistance of the purple alloy is greatly improved, the brittleness of the alloy is reduced, the surface of the alloy is smooth and compact, fine lines are reduced, and the processing performance is improved; meanwhile, the corrosion resistance of the alloy is enhanced, the color of the alloy is not influenced, and the alloy is kept uniform and fullThe color of (1).
In some embodiments, in step S10, 20 to 30 parts of aluminum and 0.8 to 1.5 parts of titanium are mixed and then melted to obtain an intermediate alloy. According to the research of the embodiment, on the premise that the adding amount of the aluminum is 20-30 parts, when the adding amount of the titanium metal is 0.1-0.5 part, the quality of the alloy is improved relative to that of an alloy formula without titanium, but the sand holes on the surface of the alloy are more. When the addition amount of the titanium metal is 0.8-1.5 parts, the purple alloy has smooth and bright surface, uniform and full color and better texture. In addition, the purple color of the alloy can be gradually reduced with the continuous increase of the addition amount of the titanium, and when the addition amount of the titanium is 3 parts, the purple color of the alloy is lighter and the color is uneven and pure. Therefore, the amount of titanium metal added in the examples of the present application is preferably 0.8 to 1.5 parts.
In some embodiments, in the step S10, the step of melting includes: mixing aluminum and titanium, and melting and mixing the aluminum and the titanium under inert atmosphere such as nitrogen, argon and the like at the temperature of 1000-1100 ℃ to form the intermediate alloy. The temperature of the inert atmosphere is 1000-1100 ℃, so that aluminum and titanium can be fully melted to form intermediate alloy, and metal oxidation caused by high temperature is avoided. If the melting temperature is too low, segregation phenomenon can occur, so that the alloy has uneven color and poor gold quality; if the melting temperature is too high, excessive volatilization of aluminum may result, causing unnecessary loss and increasing the risk of producing subcutaneous blowholes.
In some embodiments, in the step S20, the melting conditions of gold are: melting the gold in an inert atmosphere such as nitrogen and argon at 900-1100 ℃. The temperature condition of the embodiment of the application can enable the gold to fully form molten liquid with strong liquidity, and is beneficial to fully mixing and melting the gold and the intermediate alloy.
In some embodiments, the step of hybrid melt processing comprises: and mixing the molten gold and the intermediate alloy, and melting and mixing the gold and the intermediate alloy at the temperature of 1000-1100 ℃ in inert atmosphere such as nitrogen, argon and the like to form a gold ingot. The inert atmosphere with the temperature of 1000-1100 ℃ in the embodiment of the application is beneficial to fully melting the gold and the aluminum-titanium intermediate alloy to form a gold ingot, so that metal oxidation caused by high temperature is avoided; but also is beneficial to avoiding the occurrence of segregation and the generation of subcutaneous air holes. If the melting temperature is too low, segregation phenomenon can occur, so that the alloy has uneven color and poor gold quality; if the melting temperature is too high, excessive volatilization of aluminum may result, causing unnecessary loss and increasing the risk of producing subcutaneous blowholes.
In some embodiments, in the step S30, the step of the inverse mold forming process includes: under the conditions that the vacuum pressure is 2.0 KPa-3.0 KPa and the temperature is 1030-1250 ℃, melting the gold ingot, and then performing reverse molding to form a crude blank. In the reverse mold forming process of the embodiment of the application, the size of the vacuum pressure and the reverse mold temperature can affect the fluidity of the alloy liquid. If the pressure is too low, the gold of the coarse blank is loosened to generate pores; if the pressure is too high, segregation of the green body may occur.
In some embodiments, the step of annealing comprises: and (3) preserving the heat of the rough blank subjected to the reverse die forming for 3-5 hours under the inert atmosphere of nitrogen, argon and the like at the temperature of 350-650 ℃. In the annealing treatment process of the embodiment of the application, the purple depth of the alloy can be influenced by the annealing temperature and the annealing time. If the annealing temperature is too low, the alloy is lighter in purple; if the annealing time is too short, the alloy is less purple. The annealing treatment of the embodiment of the application is an aging hardening effect, and after the annealing aging hardening, the purple alloy surface has higher purple glossiness, brighter surface color and brighter purple color. Meanwhile, the alloy is better in gold quality, the surface of the purple alloy is smoother after the improvement of the annealing process, and the hardness and the compressive strength of the alloy are improved.
The second aspect of the embodiments of the present application provides a purple alloy, which includes the following metal raw materials by mass percentage, with the total mass of the purple alloy being 100%:
20 to 30 percent of aluminum,
0.1 to 3% of titanium,
67-79.9% of gold.
In the purple alloy provided by the second aspect of the embodiment of the application, 0.1-3% of titanium metal is added in the formula, and TiAu is precipitated by diffusion of gold and titanium4The aim of strengthening the alloy is fulfilled, the hardness of the purple alloy is improved, the fatigue resistance of the purple alloy is greatly improved, the brittleness of the alloy is reduced, the surface of the alloy is smooth and compact, fine lines are reduced, and the processing performance is improved; meanwhile, the corrosion resistance of the alloy is enhanced, the color of the alloy is not influenced, and the alloy is kept uniform and full purple.
The purple alloy of the embodiment can be prepared by the method of the embodiment.
In some embodiments, the titanium accounts for 0.8-1.5% by mass, and the titanium metal fully ensures the adjusting effect of the titanium on the color, the surface smoothness and the flatness of the purple alloy. When the addition amount of the titanium metal is 0.1-0.5 part, the quality of the alloy is improved relative to the formula of the alloy without titanium, but the surface of the alloy has more sand holes and poor surface smoothness. When the addition amount of the titanium metal is 0.8-1.5%, the surface of the purple alloy is smooth and bright, the color is uniform and full, and the texture of the alloy is better. In addition, the purple color of the alloy can be gradually reduced with the continuous increase of the addition amount of the titanium, and when the addition amount of the titanium is 3 percent, the purple color of the alloy is lighter and the color is uneven and pure. Therefore, the amount of titanium metal added in the examples of the present application is preferably 0.8 to 1.5 parts.
In some specific embodiments, the purple alloy comprises the following metal raw materials in percentage by mass, with the total mass of the purple alloy being 100%: 75% of gold, 1.25% of titanium and 23.75% of aluminum.
In some specific embodiments, the purple alloy comprises the following metal raw materials in percentage by mass, with the total mass of the purple alloy being 100%: 75% of gold, 0.8% of titanium and 24.2% of aluminum.
In some specific embodiments, the purple alloy comprises the following metal raw materials in percentage by mass, with the total mass of the purple alloy being 100%: 75% of gold, 1.5% of titanium and 23.5% of aluminum.
The third aspect of the embodiments of the present application provides an ornament, where the ornament is made of the purple alloy prepared by the above method, or the purple alloy.
According to the ornament provided by the third aspect of the embodiment of the application, due to the adoption of the purple alloy, the alloy is smooth and bright in surface, uniform and full in color, good in alloy texture, strong in corrosion resistance and good in color stability, the durability of the ornament is improved, and the ornamental value of the ornament is improved.
In some embodiments, the article may be a ring, necklace, watch, earring, or the like.
In order to make the above-mentioned implementation details and operations of the present application clearly understood by those skilled in the art and to make the advanced performance of the purple alloy, the preparation method thereof and the ornament of the present application obviously manifest, the above-mentioned technical solution is exemplified by a plurality of examples below.
Example 1
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 23.75 g of pure aluminum and 1.25 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Example 2
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 24.2 g of pure aluminum and 0.8 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Example 3
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 23.5 g of pure aluminum and 1.5 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Example 4
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 24.9 g of pure aluminum and 0.1 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Example 5
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 22 g of pure aluminum and 3 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Comparative example 1
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold and 25 g of pure aluminum;
2. pouring pure aluminum into a casting machine, heating to 1100 ℃, and melting uniformly;
3. putting the pure gold into a gold melting machine, heating to 1000 ℃, then adding the molten pure aluminum obtained in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, keeping the temperature of 350 ℃ for 5 hours under the protection of inert gas to obtain the color alloy jewelry.
Comparative example 2
A purple alloy jewelry is prepared by the following steps:
1. weighing 75 g of pure gold, 21.9 g of pure aluminum and 3.1 g of titanium;
2. pouring pure aluminum and titanium into a casting machine, heating to 1100 ℃, and melting uniformly to form an aluminum-titanium intermediate alloy;
3. putting pure gold into a gold melting machine, heating to 1000 ℃, then adding the intermediate alloy in the step (2), heating to 1100 ℃, and completely and uniformly melting to form an alloy ingot;
4. putting the alloy ingot prepared in the step 3 into a vacuum mould-reversing machine, heating to 1200 ℃ under the vacuum pressure of 2.0KPa, and after the alloy ingot is completely melted, carrying out heat preservation for 5 minutes and then reversing the mould to form a crude blank;
5. and 4, after the rough blank is subjected to die holding and lathing and beating of the jewelry processing technology, the blank is subjected to heat preservation for 5 hours at 350 ℃ under the protection of inert gas, and the purple alloy jewelry with beautiful luster can be prepared.
Further, in order to verify the progress of the examples of the present application, the following performance tests were performed on the purple alloy jewelry prepared in the examples and comparative examples:
1. and (3) observing the appearance: FIG. 1 is a picture of a purple alloy jewelry of an embodiment 1, FIG. 2 is a picture of a purple alloy jewelry of an embodiment 2, FIG. 3 is a picture of a purple alloy jewelry of an embodiment 3, FIG. 4 is a picture of a purple alloy jewelry of an embodiment 4, and FIG. 5 is a picture of a purple alloy jewelry of a comparative example 1. As can be seen from the topography, compared with the comparative example 1 without titanium, the purple alloy jewelry prepared by the embodiment added with titanium has better glossiness, more uniform color and smoother surface. In the examples 1-3, when the addition amount of titanium is 0.8-1.5%, the jewelry has the best color and smoothness. In the embodiment 4, the content of the added titanium is relatively less and is only 0.1%, so that the purple alloy jewelry has sand holes, and the surface smoothness is reduced.
2. And (3) drop resistance test: in the simulation wearing process, the test height is 1.6 m according to the impact test method of carelessly dropping to the ground. The results are shown in table 1 below:
TABLE 1
Wherein, the total test times of the example 1 is 20 times, and the purple alloy jewelry passes 20 times of falling resistance tests. The total number of tests of example 2 was 16, and the violet alloy jewelry broke at the 16 th test. The total number of tests in example 3 was 18, and the violet alloy jewelry broke at the 18 th test. The total number of tests of example 4 was 3, and the violet alloy jewelry broke at the 3 rd test. The total number of tests of example 5 was 3, and the violet alloy jewelry broke at the 3 rd test. The total number of tests of comparative examples 1 and 2 was 2, and the purple alloy jewelry cracked during the second test. The test results in the table 1 show that, compared with the comparative example 1 without titanium or the comparative example 2 with too high titanium addition, the purple alloy jewelry prepared in the embodiments 1 to 5 of the application has 0.1 to 3 percent of titanium added, so that the falling resistance of the jewelry is obviously improved, the brittleness of the jewelry is reduced, and the falling passing rate from the height of 1.6 m is obviously improved. When the addition amount of titanium is 0.8-1.5%, the purple alloy jewelry shows better drop resistance.
3. And (3) vulcanization test: the samples were immersed in a sodium sulfide solution, the test temperature was controlled at 20 + -5 deg.C, and the time to sulfidation corrosion resistance was recorded if discoloration occurred in about 25% of the area.
TABLE 2
From the test results in table 2, it can be seen that the time for resisting sulfidation corrosion is increased in the titanium-containing examples 1 to 4 and the comparative example 2 compared with the comparative example 1 without titanium, which shows that the corrosion resistance of the purple alloy jewelry can be remarkably improved by adding titanium metal.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The preparation method of the purple alloy is characterized by comprising the following steps of:
mixing 20-30 parts of aluminum and 0.1-3 parts of titanium, and then carrying out melting treatment to obtain an intermediate alloy;
melting 67-79.9 parts of gold, and then mixing and melting the gold and the intermediate alloy to form a gold ingot;
and sequentially carrying out reverse die forming treatment and annealing treatment on the gold ingot to obtain the purple alloy.
2. The method for producing the purple alloy of claim 1, wherein the weight fraction of titanium is 0.8 to 1.5 parts.
3. The method for producing a violet alloy according to claim 1 or 2, wherein the step of melt-processing comprises: and after mixing the aluminum and the titanium, melting and mixing the aluminum and the titanium in an inert atmosphere at the temperature of 1000-1100 ℃ to form the intermediate alloy.
4. The method for preparing the purple alloy of claim 3, wherein the melting conditions of the gold are as follows: and melting the gold in an inert atmosphere at the temperature of 900-1100 ℃.
5. The method for producing a violet alloy of claim 4, wherein the step of mixing and melting comprises: and mixing the molten gold and the intermediate alloy, and then melting and mixing the gold and the intermediate alloy in an inert atmosphere at the temperature of 1000-1100 ℃ to form the gold ingot.
6. The method for producing a violet alloy according to any one of claims 1, 2, 4 or 5, wherein the step of the reverse molding process comprises: under the conditions that the vacuum pressure is 2.0 KPa-3.0 KPa and the temperature is 1030-1250 ℃, melting the gold ingot, and then performing reverse molding to form a crude blank;
and/or the step of annealing treatment comprises: and preserving the heat of the rough blank subjected to the reverse die forming for 3-5 hours at the temperature of 350-650 ℃ in an inert atmosphere.
7. The purple alloy is characterized by comprising the following metal raw materials in percentage by mass based on 100% of the total mass of the purple alloy:
20 to 30 percent of aluminum,
0.1 to 3% of titanium,
67-79.9% of gold.
8. The violet alloy of claim 7, wherein the titanium is present in an amount of 0.8 to 1.5% by mass.
9. The purple alloy of claim 7 or 8, wherein the purple alloy comprises the following metal raw materials in percentage by mass based on 100% of the total mass of the purple alloy: 75% of gold, 1.25% of titanium and 23.75% of aluminum;
or 75% of gold, 0.8% of titanium and 24.2% of aluminum;
alternatively, gold 75%, titanium 1.5% and aluminum 23.5%.
10. An ornament, wherein the purple alloy prepared by the method of any one of claims 1 to 6 is used, or the purple alloy of any one of claims 7 to 9 is used.
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| CN115011833A (en) * | 2021-12-21 | 2022-09-06 | 昆明理工大学 | Formula for improving toughness of purple 18K gold-aluminum alloy and preparation method thereof |
| CN115092895A (en) * | 2022-07-19 | 2022-09-23 | 江西先进铜产业研究院 | Low-cost purple alloy material and preparation method and application thereof |
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