CN108866375A - A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique - Google Patents

Abstract

The invention discloses a kind of resistance to sweat discoloration brown 14K billon of jewellery material and its techniques.According to weight percent, the ingredient of the alloy is:Ca:0.3-0.5wt.%,Te:0.2-0.4wt.%,Ru:1.0-1.2wt.%,Hf:1.5-2.0wt.%,Cu:16.0-20.0wt.%,Ni:10.0-12.0wt.%,Au:58.0-59.0wt.%, surplus are silver.The patent solves the insufficient status of the reddish brown golden performance of current K, and effectively breaches the development bottleneck in field of jewelry.It is contemplated that the implementation and industrialization of the material can obtain plentiful and substantial economic gain and social benefit.

Description

A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique

Technical field

The present invention relates to technical field of alloy, specifically, being related to a kind of billon.

Background technique

Gold has high erosion-resisting stability, good electric conductivity and thermal conductivity.Gold also good craftsmanship, Easily it is processed into ultra-thin goldleaf, micron spun gold and bronze.Gold is easy on the surface for being plated to other metals and pottery and glass, Gold is easy by melting welding and smithwelding under certain pressure.These numerous functional characteristics make gold or billon use modern height extensively In new technological industry, such as electronic technology, mechanics of communication, aerospace flight technology, Chemical Engineering Technology, medical technology.

Golden initial functions as jewellery and decorative material material and obtains the attention of people.With the development of the times and people People's improvement of living standard, the aesthetic idea of people are also constantly promoted, and noble metal jewelry is more and more by vast consumption The favor of person.Proof gold due to too soft, it is recent be no longer most popular breeding in the market.Due to controlling different add Added elements and content can control the performance color of billon, thus the jewellery of billon preparation or ornament materials are on the market It is more favourable.International K system is generallyd use to measure the content of gold, thus billon is also referred to as karat gold.

The technology that karat gold jewellery are born with its unique essence, has won the heart of people, it will be filled with mysterious, illusion color Natural gemstone dexterously combines together with karat gold, shows charming elegance.Although karat gold jewellery are not grown in the history that China produces, But between from it after generation, sweep the country immediately.Karat gold can produce the ornaments of more multi-configuration item, meet the heart that modern follows the fashion Reason, meets the aesthetic requirement of modern.Currently, traditional gold ornaments has been subjected to the impact of colourful karat gold jewelry, by It is more in karat gold ornaments color, it is handsome in appearance, it is cheap, it will to be increasingly accepted by people and like.

Why welcome karat gold jewellery are, this is because its many aspect is better than proof gold jewellery.Proof gold jewellery are softer, are easy Deformation and abrasion.And karat gold jewellery are due to joined other metals into billon, it is corrosion-resistant at both wear-resisting, and be unlikely to deform Alloying metal.Since the raising of golden hardness promotes the fast development of jewellery industry, traditional-handwork processing for thousands of years is broken The habit of jewellery also changes originally backward processing technology.Present processing of ornament not only plates, and there are also nail edge, pawl edges etc.. This is that proof gold jewellery can not be accomplished.Karat gold various colors, and proof gold jewellery are a kind of color, i.e. golden true qualities.Karat gold Occur, people are brought in a multicoloured world.When proof gold is cleverly combined with other metals, will present different Color.In addition, karat gold style is modish, and proof gold jewellery style is more dull, stiff.The style of K jewellery in the market, can be up to several Ten thousand kinds, ten tens of thousands of kinds, its novelty, aesthetic feeling completely can be with times.

As the drawback of the differentiation in market, the aggravation of competition, the promotion of consumers' aesthetic grade, industry homogeneity highlights.K Golden market is developing.Market more needs the karat gold product that personalized, fashion is graceful, and originality is full, design processing is first-class, To meet brand personality demand.On the one hand the addition of karat gold ornaments alloy element improves the hardness of gold ornaments, to be suitble to production On the other hand various gemmy jewellery can also change the colors of karat gold ornaments by changing the ratio of the type of its ingredient. The color of karat gold also has the type of brownish red with outside red in addition to yellow, white.Traditionally, it is formed when Pd is added in gold Billon just there is reddish brown color.But regrettably, the addition of Pd will form intermetallic compound.And such is closed Gold is after using some months through normal the phenomenon that changing colour, the serious perception for affecting jewellery.

Although China's bullion industry, especially first jewelry alloy is quickly grown, and due to starting evening, starting point is low, one Also there is a big difference compared with world level on a little sport technique segments.Industry problems do not solve for a long time, not only affect related production The market sales volume and usage experience of product, also serious such product that limits is in the market occupancy volume of international scope.Exploitation is simultaneously It has been the inevitable problem of field of jewelry that industrialization, which has the brownish red karat gold of advanced feature, and domestic for a long time is very much Research institution and enterprise have carried out multi-faceted trial, but regrettably, any substance is not yet obtained so far Progress.Alloy material can be carried out by the thermodynamics and kinetics means of bottom by advanced design of material technology Innovation, and very big market value is had to the problem solution and industrialization of developing and develop karat gold.In face of what is be growing more intense Domestic and international market competition, it is necessary to paces of accelerating restructuring, this is not only the needs of China's jewellery industry survival and development, It is the development trend of world today's related fields.

Summary of the invention

The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of resistance to sweat discoloration brown 14K gold of jewellery material Alloy and its technique.

To achieve the goals above, the present invention adopts the following technical scheme that：

A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique.By weight percentage, the group of alloy becomes Ca:0.3-0.5wt.%,Te:0.2-0.4wt.%,Ru:1.0-1.2wt.%,Hf:1.5-2.0wt.%,Cu:16.0-20.0wt.%, Ni:10.0-12.0wt.%,Au:58.0-59.0wt.%, surplus are silver.

The preparation method of a kind of resistance to sweat discoloration brown 14K billon of above-mentioned jewellery material and its technique, including walk as follows Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Using low after metal molten The argon gas of flow is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1200 degree when melting, leans on high frequency Induction furnace electromagnetic agitation is uniform;1 minute, which is kept the temperature, at 1200 degree after mixing evenly and is cast comes out of the stove;Billon casting uses diameter The punching block of 50-100mm, and cooled down by the way of water cooling.Resulting ingot casting is rolled at room temperature, rolls lower amount per pass For 30-40%;It is 380 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally by material be rolled into a thickness of The golden plate of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates the stress in process;Its In, homogenization temperature is 350 degree, and the time is 1-2 hours.

Compared with prior art, the present invention has the advantages that：

（1）Traditionally, the billon formed when Pd is added in gold just has reddish brown color.But regrettably, The addition of Pd will form intermetallic compound.And such alloy is passed through the phenomenon that often changing colour after using some months, it is serious Affect the perception of jewellery.This patent has carried out multi-faceted innovation and raising to karat gold by advanced materialogy technology.Also It is to say, it solves the colors that the reddish brown coloured gold material of field of jewelry K is difficult to take into account, and corrosion resistance and processing performance cannot The status obtained simultaneously.

（2）Traditional brownish red karat gold material composition is also uncomplicated, but dendritic segregation is serious after being poured, and is unfavorable for it and adds Work performance and corrosion resistance.Homogenization Treatments must be carried out before processing, corrosion resistant when causing the cumbersome of process and using Corrosion can be insufficient.The alloy of present patent application protection has close to eutectic structure, possesses optimal etch resistant properties and machining deformation Performance.The generation of primary phase, and thinning microstructure can be efficiently controlled after casting.Meanwhile the alloy due to liquidus curve it is relatively low, Thus it is suitable for casting.

（3）For the alloy of this patent when carrying out alloying component and performance optimizes, the screening of alloying component is first from electricity From the point of view of chemical attack mechanisms, select the alloying element being added in billon that can form passivating film on surface, thus right Ambient enviroment corrosion plays a protective role.Since corrosive medium is human sweat in the use environment of jewellery, thus in artificial sweat Corrosion test under pendular ring border has practical significance.According to ISO3160-2:2003《Watchcase and attachment billon shell part 2: Finish, thickness, corrosion resistance and adhesiveness measurement》, 24 h and 48 h people have been carried out to the karat gold alloy of present patent application protection Work sweat corrosion test.Test result shows that successively after 24 h and 48 h artificial perspiration's corrosion tests, karat gold color becomes without obvious Change, the equal non-corroding object of alloy surface and the bad phenomenons such as saltout are converted into when wearing corrosive chameleon and are asked up to 10 years.Illustrate this Material has good sweat proof corrosion performance.

Specific embodiment

Embodiment 1

A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique.By weight percentage, the group of alloy becomes Ca:0.3wt.%,Te:0.2wt.%,Ru:1.0wt.%,Hf:1.5wt.%,Cu:16.0wt.%,Ni:10.0wt.%,Au: 58.0wt.%, surplus are silver.A kind of resistance to sweat discoloration brown 14K billon of above-mentioned jewellery material and its technique, including walk as follows Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Using low after metal molten The argon gas of flow is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1200 degree when melting, leans on high frequency Induction furnace electromagnetic agitation is uniform;1 minute, which is kept the temperature, at 1200 degree after mixing evenly and is cast comes out of the stove;Billon casting uses diameter The punching block of 50-100mm, and cooled down by the way of water cooling.Resulting ingot casting is rolled at room temperature, rolls lower amount per pass For 30-40%;It is 380 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally by material be rolled into a thickness of The golden plate of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates the stress in process;Its In, homogenization temperature is 350 degree, and the time is 1-2 hours.

The alloy has close to eutectic structure, possesses optimal etch resistant properties and Deformation Properties of Al.Can have after casting The generation of effect ground control primary phase, and thinning microstructure.Meanwhile the alloy due to liquidus curve it is relatively low, thus be suitable for casting.It closes The screening of golden ingredient selects the alloying element being added in billon can be in table first from the point of view of Electrochemical Corrosion Mechanism Face forms passivating film, to play a protective role to ambient enviroment corrosion.By the detection of prolonged artificial sweat, alloy table The equal non-corroding object in face and the bad phenomenons such as saltout are converted into when wearing corrosive chameleon and are asked up to 10 years, illustrate that the material has Good sweat proof corrosion performance.

Embodiment 2

A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique.By weight percentage, the group of alloy becomes Ca:0.5wt.%,Te:0.4wt.%,Ru:1.2wt.%,Hf:2.0wt.%,Cu:20.0wt.%,Ni:12.0wt.%,Au: 59.0wt.%, surplus are silver.A kind of resistance to sweat discoloration brown 14K billon of above-mentioned jewellery material and its technique, including walk as follows Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Using low after metal molten The argon gas of flow is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1200 degree when melting, leans on high frequency Induction furnace electromagnetic agitation is uniform;1 minute, which is kept the temperature, at 1200 degree after mixing evenly and is cast comes out of the stove;Billon casting uses diameter The punching block of 50-100mm, and cooled down by the way of water cooling.Resulting ingot casting is rolled at room temperature, rolls lower amount per pass For 30-40%;It is 380 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally by material be rolled into a thickness of The golden plate of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates the stress in process;Its In, homogenization temperature is 350 degree, and the time is 1-2 hours.

The alloy has close to eutectic structure, possesses optimal etch resistant properties and Deformation Properties of Al.Can have after casting The generation of effect ground control primary phase, and thinning microstructure.Meanwhile the alloy due to liquidus curve it is relatively low, thus be suitable for casting.It closes The screening of golden ingredient selects the alloying element being added in billon can be in table first from the point of view of Electrochemical Corrosion Mechanism Face forms passivating film, to play a protective role to ambient enviroment corrosion.By the detection of prolonged artificial sweat, alloy table The equal non-corroding object in face and the bad phenomenons such as saltout are converted into when wearing corrosive chameleon and are asked up to 10 years, illustrate that the material has Good sweat proof corrosion performance.

Embodiment 3

A kind of resistance to sweat discoloration brown 14K billon of jewellery material and its technique.By weight percentage, the group of alloy becomes Ca:0.4wt.%,Te:0.3wt.%,Ru:1.1wt.%,Hf:1.8wt.%,Cu:18.0wt.%,Ni:11.0wt.%,Au: 58.0wt.%, surplus are silver.A kind of resistance to sweat discoloration brown 14K billon of above-mentioned jewellery material and its technique, including walk as follows Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Using low after metal molten The argon gas of flow is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1200 degree when melting, leans on high frequency Induction furnace electromagnetic agitation is uniform;1 minute, which is kept the temperature, at 1200 degree after mixing evenly and is cast comes out of the stove;Billon casting uses diameter The punching block of 50-100mm, and cooled down by the way of water cooling.Resulting ingot casting is rolled at room temperature, rolls lower amount per pass For 30-40%;It is 380 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally by material be rolled into a thickness of The golden plate of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates the stress in process;Its In, homogenization temperature is 350 degree, and the time is 1-2 hours.

The alloy has close to eutectic structure, possesses optimal etch resistant properties and Deformation Properties of Al.Can have after casting The generation of effect ground control primary phase, and thinning microstructure.Meanwhile the alloy due to liquidus curve it is relatively low, thus be suitable for casting.It closes The screening of golden ingredient selects the alloying element being added in billon can be in table first from the point of view of Electrochemical Corrosion Mechanism Face forms passivating film, to play a protective role to ambient enviroment corrosion.By the detection of prolonged artificial sweat, alloy table The equal non-corroding object in face and the bad phenomenons such as saltout are converted into when wearing corrosive chameleon and are asked up to 10 years, illustrate that the material has Good sweat proof corrosion performance.

Claims (3)

1. Brown 14K billon and its technique 1. a kind of resistance to sweat of jewellery material changes colour；According to weight percent, the ingredient of the alloy For:Ca:0.3-0.5wt.%,Te:0.2-0.4wt.%,Ru:1.0-1.2wt.%,Hf:1.5-2.0wt.%,Cu:16.0- 20.0wt.%,Ni:10.0-12.0wt.%,Au:58.0-59.0wt.%, surplus are silver.
2. 2. a kind of resistance to sweat discoloration brown 14K billon of jewellery material described in claim 1 and its technique, it is characterised in that including Following smelting step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Metal is molten It is protected after change using the argon gas of low discharge, big air-flow is avoided to make the serious scaling loss of alloying element;10 are kept the temperature at 1200 degree when melting Minute, it is uniform by Efco-Northrup furnace electromagnetic agitation;1 minute, which is kept the temperature, at 1200 degree after mixing evenly and is cast comes out of the stove;Billon pours Casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.
3. 3. according to a kind of resistance to sweat discoloration brown 14K billon of jewellery material described in claim 1 and its technique, it is characterised in that packet Step is used containing following：Resulting ingot casting is rolled at room temperature, rolling lower amount per pass is 30-40%;After rolling twice Intermediate anneal temperature is 380 degree, keeps the temperature 0.5 hour;Material is finally rolled into the golden plate with a thickness of 10-20mm;Jewellery at It during type, needs to carry out intermediate annealing process, eliminates the stress in process;Wherein, homogenization temperature is 350 degree, when Between be 1-2 hours.