CN107164651B - A kind of jewellery pink colour silver alloy and preparation method thereof - Google Patents
A kind of jewellery pink colour silver alloy and preparation method thereof Download PDFInfo
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- CN107164651B CN107164651B CN201710478216.2A CN201710478216A CN107164651B CN 107164651 B CN107164651 B CN 107164651B CN 201710478216 A CN201710478216 A CN 201710478216A CN 107164651 B CN107164651 B CN 107164651B
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Abstract
The invention discloses a kind of jewellery pink colour silver alloy, the ingredient comprising following mass percentage: silver-colored 33.10~42.50%, copper 55.00~61.50%.Silver alloy of the present invention, its color is in bright pink, hardness of cast form, fusing point are moderate, with good casting forming function and punch forming performance, meet jewellery forming and inlays requirement, there is good corrosion resistance, anti-oxidant discoloration, low in cost, the practical application value height of alloy in 37 DEG C of synthetic perspirations.Meanwhile invention additionally discloses a kind of preparation methods of jewellery pink colour silver alloy.
Description
Technical field
The present invention relates to a kind of silver alloy and preparation method thereof, especially a kind of jewellery pink colour silver alloy and its preparation side
Method.
Background technique
Silver belongs to one kind of noble metal, but its price is far below other noble metals such as gold, platinum, palladium, thus in jewellery
Industrial application is extremely extensive, is largely considered as fashion decorations material.Silver have good processing and fabricating performance and
The chemical property of relative good reaches 94% to the reflectivity of visible light, is the highest substance of reflectivity in all metallic elements.
Silver jewellery material currently on the market is based on 925 silver medals and 990 silver medals, and since silver content is very high, alloy is all white without exception
, limit its decorative performance.
To make silver alloy jewellery that there is richer decorative appearance, generally pass through Integral alloy, surface coating, surface
Color is presented in the approach such as modified.Integral alloy is the alloying element of the addition energy coloring in silver alloy, such as gold, copper, is led to
The ratio of allotment color-causing element and other elements content is crossed to obtain required color.Surface coating is by plating, chemical plating
Etc. modes deposit one layer of coloured film layer, such as black coating rhodium, rose gold etc. on jewellery surface.Surface modification be by chemistry,
The techniques such as electrochemistry form colored film layer on jewellery surface, such as generate black on surface by vulcanization, high-temperature oxydation.Due to rear
Two kinds of face technique is all to belong to process of surface treatment, and jewellery may lose color because of abrasion after a period of use, make base
Bottom and the non-worn area of film layer generate apparent contrast, seriously affect decorative performance.
Japan Patent JP2005217314A discloses a kind of similar pink colour silver alloy, it includes silver, copper, gold, palladium, germanium
Five kinds of components, these alloys can obtain pink to varying degrees, but due to containing considerable amount of expensive gold,
The alloying elements such as palladium, germanium, their cost far beyond the receptible range of silver alloy jewellery institute, are not acceptable to the market, do not have
Practical application value.French Patent (FRP) FR0003707A discloses a kind of pink colour silver alloy, component include silver, copper, palladium,
Indium, gold, wherein palladium content is up to 3-20%, and also difficulty is acceptable to the market, and brings larger difficulty to processing and manufacturing.
In existing research, palladium is added in yellow gold, and certain blanching effect, copper, silver, palladium three can be generated to copper
Collocation, it is easy to prepare pink silver alloy.But the fusing point of palladium is high, addition palladium amount is more than that can obviously increase after 2%
Difficulty is cast, and the sky high cost of palladium makes it unsuitable for the alloying element as pink colour silver alloy, in addition, in existing research also
The report of pink silver alloy is not prepared only with copper and silver collocation.
Summary of the invention
Based on this, provided it is an object of the invention to overcome in place of above-mentioned the deficiencies in the prior art a kind of cost performance it is high,
Color is in bright pink jewellery silver alloy.With in pink colour silver alloy, silver and copper cooperate jewellery of the present invention, make face
Color is not only in bright pink, also has preferable processing and fabricating performance, anti-oxidant discoloration, and the cost of alloy
It is low, there is good cost performance, practical application value is high, in which:
Silver be alloy it is basic composition one of, due to silver to visible light have very strong reflex, help to improve conjunction
The brightness of gold, but excessively high silver content promotes alloy color to bleach, and increases coloring difficulty, and too low silver content is then unfavorable for
Brightness, processing and fabricating performance and the anti-oxidant discoloration of alloy.
Copper is the color-causing element of pink silver alloy.Aubergine is presented in copper itself, and when with white metal chemical combination, aubergine is obtained
With bleaching, bleaching degree depends on the type and content of other white metal elements.Alloy color is partially purplish red when copper content is excessively high,
Brightness reduces, and the chemical stability of alloy is bad, and is unfavorable for castability；Alloy color is light when copper content is too low, decoration
Performance, the hardness of alloy also will receive very big influence.
Testing inspection is carried out by the yellow gold to different proportion, discovery is big when the ratio of copper, silver-colored mass percentage
When 2.0, the color of alloy is partially red, has deviateed pink regions；And when copper, silver-colored mass percentage ratio less than 1.2 when, close
The color of gold is partially white, only very light pink colour.And when copper, silver-colored mass percentage ratio between 1.3~1.86 when, alloy table
Reveal preferable pink colour.Therefore, to achieve the above object, a kind of the technical solution used in the present invention are as follows: jewellery pink colour silver
Alloy, the ingredient comprising following mass percentage: silver-colored 33.10~42.50%, copper 55.00~61.50%.
Preferably, the silver alloy also includes zinc, and the mass percentage of the zinc is 1.50~3.00%.Zinc closes silver
Gold has auxiliary bleaching effect, can improve the anti-oxidant discoloration of alloy, can drop low-alloyed fusing point, has preferable improve to cast
The effect of performance.But in silver alloy of the present invention, inventor attempts discovery by a large amount of, when Zn content is lower than 1.5%, alloy
Antioxygenic property and casting character it is undesirable, casting and heat treatment when surface be easy black, and when Zn content be higher than 3.0%
When, the hardness of alloy is lower, and is easy to produce zinc oxide during melting and casting and is mingled with.In 1.50~3.00% this range
When, zinc can achieve Optimized Matching to the effect of the color of alloy, antioxygenic property, casting character, mechanical performance etc., because
This application selects 1.50~3.00% this range.
Preferably, the silver alloy also includes silicon, and the mass percentage of the silicon is 0.10~0.60%.Silicon can be significant
The casting character of improvement alloy and anti-oxidant discoloration, and effective blanching effect is generated to the color of alloy, improve alloy
Brightness.But in silver alloy of the present invention, inventor attempts discovery by a large amount of, when silicone content is lower than 0.1%, the casting of alloy
It is poor to make performance, surface is easy to black when casting and being heat-treated, and the brightness of alloy is undesirable, and when silicone content is higher than 0.6%,
Have the tendency that causing alloy hot tearing and crystal grain extremely coarse, processing performance deteriorates, and hard spot easily occurs, influences surface polishing matter
Amount.In 0.10~0.60% this range, silicon can to the effect of the color of alloy, antioxygenic property, casting character etc.
To reach Optimized Matching, therefore the application selects 0.10~0.60% this range.And the bleaching of the silicon of above-mentioned content range
Effect is stronger, they and silver-colored Optimized Matching can mix more beautiful pink colour.
Preferably, the silver alloy also includes beryllium, and the mass percentage of the beryllium is 0.20~0.30%.Beryllium can improve
The mechanical property of alloy, improves the intensity and hardness of alloy, and improving welding property improves corrosion resistance.But in silver alloy of the present invention
In, inventor attempts discovery by a large amount of, when beryllium content is lower than 0.2%, mechanical property, welding performance and the corrosion resistance of alloy
Can it is undesirable, and beryllium content be higher than 0.3% when, will affect the ductility and comprehensive mechanical property of alloy.0.20~0.30%
When this range, beryllium can achieve Optimized Matching to the effect of the mechanical property, welding performance and corrosion resisting property of alloy etc.,
Therefore the application selects 0.20~0.30% this range.
Preferably, the silver alloy also includes cobalt, and the mass percentage of the cobalt is 0.26~0.50%.Cobalt plays carefully
Change the effect of crystal grain, and the timeliness effect of alloy can be enhanced, is conducive to the mechanical property of alloy, but in silver alloy of the present invention,
Inventor attempts discovery by a large amount of, and when cobalt content is lower than 0.26%, the grain structure of alloy is undesirable, is especially annealing
When crystal grain may grow up, and when cobalt content is higher than 0.5%, the casting character of alloy is deteriorated, and ductility and comprehensive mechanical property
Deteriorate.In 0.26~0.50% this range, cobalt is to the grain structure and mechanical property of alloy, welding performance and corrosion resisting property
Etc. effect can achieve Optimized Matching, therefore the application selects 0.26~0.50% this range.
Preferably, the silver alloy also includes tin, and the mass percentage of the tin is 0.30~0.80%.Tin can improve
The anti-oxidant discoloration of alloy reduces alloy melting point, improves alloy flowability and casting character.But in silver alloy of the present invention
In, inventor attempts discovery by a large amount of, when Theil indices are lower than 0.3%, the casting character of alloy and anti-oxidant discoloration
It is undesirable, and when Theil indices are higher than 0.8%, the casting character of alloy is deteriorated, and ductility and comprehensive mechanical property deteriorate.?
When 0.30~0.80% this range, cobalt is to the grain structure and mechanical property of alloy, welding performance and corrosion resisting property etc.
Effect can achieve Optimized Matching, therefore the application selects 0.30~0.80% this range.
Preferably, the silver alloy also includes yttrium, and the mass percentage of the yttrium is 0.05~0.10%.Yttrium can improve
The brightness of alloy and anti-oxidant discoloration refine grain structure, improve the hardness of alloy, improve casting character.But in this hair
In bright silver alloy, inventor attempts discovery by a large amount of, when yttrium content is lower than 0.05%, the casting character of alloy and anti-oxidant
Discoloration is undesirable, tissue, and as-cast grain size is larger.And yttrium content be higher than 0.10% when, be easy scene segregation, generate oxygen
Change is mingled with, and ductility is greatly reduced, and leads to the brittleness of alloy, and the polishing performance of alloy also deteriorates.0.05~0.10% this
When range, yttrium can achieve the effect of the grain structure and mechanical property of alloy, welding performance and corrosion resisting property etc. excellent
Change matching, therefore the application selects 0.05~0.10% this range.
Meanwhile the preparation method the present invention also provides a kind of above-mentioned jewellery with pink colour silver alloy, the method are as follows: by raw material
It is placed in crucible, vacuumizes, applying argon gas, then carry out melting, it is all melting down to furnace charge, molten metal is poured into ingot mould,
Pink colour silver alloy ingot casting is obtained, by ingot casting cleaning, drying to get jewellery pink colour silver alloy.
Some fusing points height or oxidizable alloying element involved in alloy of the present invention, to avoid directlying adopt pure metal material
The problems such as bring smelting temperature is high when alloyage, ingredient fluctuation is big, metallurgical quality is poor, first prepares intermediate alloy.
Preferably, above-mentioned raw materials include the ingredient of following mass percentage: fine silver 33.2~42.6%, anaerobic fine copper
22.5~35.6%, brass 5.3~10.7%, cupro silicon 0.3~4.8%, beallon 10.2~15.1%, copper-tin alloy
3.1~8.1%, copper yittrium alloy 1.1~2.1%, copper-cobalt alloy 2.5~4.3%.
Preferably, 10wt% containing cobalt in the copper-cobalt alloy, siliceous 10wt% in the cupro silicon, the copper yttrium close
Jin Zhonghan yttrium 5wt%, stanniferous 10wt% in the copper-tin alloy.
Compared with the existing technology, the invention has the benefit that
Silver alloy of the present invention, for color in bright pink, hardness of cast form, fusing point are moderate, have good be cast as
Type performance and punch forming performance, meet jewellery forming and inlay requirement, in 37 DEG C of synthetic perspirations have good corrosion resistance,
Anti-oxidant discoloration, low in cost, the practical application value height of alloy.
Detailed description of the invention
Fig. 1 is the differential thermal analysis curve of jewellery pink colour silver alloy described in embodiment 1；
Fig. 2 is the differential thermal analysis curve of jewellery pink colour silver alloy described in embodiment 2.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Embodiment 1
A kind of embodiment of jewellery of the present invention pink colour silver alloy, jewellery pink colour silver alloy packet described in the present embodiment
Ingredient containing following mass percentage:
34.91wt% silver, 60.24wt% copper, 3.00wt% zinc, 0.56wt% silicon, 0.25wt% beryllium, 0.39wt% cobalt,
0.50wt% tin, 0.06wt% yttrium and other inevitable impurity.
One kind of the pink colour silver alloy of jewellery described in the present embodiment the preparation method is as follows:
(1) alloyage
1) intermediate alloy is prepared: the anaerobic fine copper that selects copper content for 99.95wt%, the gold that amount containing cobalt is 99.99wt%
Belong to the gold that cobalt, the metallic silicon that silicon content is 99.8wt%, the metallic yttrium that amount containing yttrium is 99.9wt%, stanniferous amount are 99.95wt%
Belong to tin, prepares the copper yttrium of the copper-cobalt alloy of the 10wt% containing cobalt, the cupro silicon of siliceous 10wt%, the 5wt% containing yttrium with them respectively
The copper-tin alloy of alloy, stanniferous 10wt%, these intermediate alloys smelting and pouring ingot under vacuum protection atmosphere.
2) it is for anaerobic fine copper, the zinc content of 99.95wt% for the fine silver of 99.95wt%, copper content with silver content
The H70 brass of 29.8wt%, the casting beryllium-bronze Cu-2Be-0.5Co-0.3Si of the 2wt% containing beryllium and previous step preparation
Intermediate alloy be raw material, prepare pink colour silver alloy of the invention, match as follows:
35.0wt% fine silver, 28.2wt% anaerobic fine copper, 10.7wt%H70 brass, 4.4wt% cupro silicon,
12.7wt% beryllium copper, 5.1wt% copper-tin alloy, 1.3wt% copper yittrium alloy, 3.3wt% copper-cobalt alloy.
(2) melting and casting
The raw material prepared in proportion and intermediate alloy are placed in graphite crucible, -0.1MPa is evacuated down to, then fills
Enter industrial straight argon.It is all melting down to furnace charge using vacuum induction melting, after temperature component is uniform, molten metal is poured into steel ingot
In mould, pink colour silver alloy ingot casting is obtained.By ingot casting cleaning, drying, that is, it can be used as Jewelry casting or stamping raw material.
(3) the performance test research of alloy
The pink colour silver alloy color that the present embodiment is prepared is pink bright, and hardness is moderate, meets jewellery forming and inlays requirement,
The fusing point of alloy is suitble to using precision casting process, and alloy has good corrosion resistance in 37 DEG C of synthetic perspirations, low in cost,
Far below containing gold, palladium, germanium alloy.
1) hardness of cast form of alloy: HV103
2) colour index of alloy: L*=84.29, a*=4.11, b*=14.7 have beautiful pink colour.
3) melting range is 755.4-788.7 DEG C to the differential thermal analysis curve of alloy as shown in Figure 1:, is very suitable to using stone
Paste type hot investment casting.
4) corrosion resistance of alloy: in 37 DEG C of synthetic perspirations, corrosion potential is -0.71V, and pitting potential is -0.1V, tool
There is good anti-corrosion discoloration-resisting.
Embodiment 2
A kind of embodiment of jewellery of the present invention pink colour silver alloy, jewellery pink colour silver alloy packet described in the present embodiment
Ingredient containing following mass percentage:
39.90wt% silver, 57.12wt% copper, 1.97wt% zinc, 0.12wt% silicon, 0.25wt% beryllium, 0.26wt% cobalt,
0.30wt% tin, 0.06wt% yttrium and other inevitable impurity.
One kind of the pink colour silver alloy of jewellery described in the present embodiment the preparation method is as follows:
(1) alloyage
1) intermediate alloy is prepared: the anaerobic fine copper that selects copper content for 99.95wt%, the gold that amount containing cobalt is 99.99wt%
Belong to the gold that cobalt, the metallic silicon that silicon content is 99.8wt%, the metallic yttrium that amount containing yttrium is 99.9wt%, stanniferous amount are 99.95wt%
Belong to tin, prepares the copper yttrium of the copper-cobalt alloy of the 10wt% containing cobalt, the cupro silicon of siliceous 10wt%, the 5wt% containing yttrium with them respectively
The copper-tin alloy of alloy, stanniferous 10wt%, these intermediate alloys smelting and pouring ingot under vacuum protection atmosphere.
2) it is for anaerobic fine copper, the zinc content of 99.95wt% for the fine silver of 99.95wt%, copper content with silver content
The H70 brass of 29.8wt%, the casting beryllium-bronze Cu-2Be-0.5Co-0.3Si of the 2wt% containing beryllium and previous step preparation
Intermediate alloy be raw material, prepare pink colour silver alloy of the invention, match as follows:
40wt% fine silver, 34.3wt% anaerobic fine copper, 7wt%H70 brass, 0.3wt% cupro silicon, 12.7wt% beryllium
Copper, 3.1wt% copper-tin alloy, 1.3wt% copper yittrium alloy, 2.0wt% copper-cobalt alloy.
(2) melting and casting
The raw material prepared in proportion and intermediate alloy are placed in graphite crucible, -0.1MPa is evacuated down to, then fills
Enter industrial straight argon.It is all melting down to furnace charge using vacuum induction melting, after temperature component is uniform, molten metal is poured into steel ingot
In mould, pink colour silver alloy ingot casting is obtained.By ingot casting cleaning, drying, that is, it can be used as Jewelry casting or stamping raw material.
(3) alloy performance test is analyzed
The pink colour silver alloy that the present embodiment is prepared has color pink bright, and hardness is moderate, meets jewellery forming and inlays
It is required that the fusing point of alloy is suitble to using precision casting process, alloy has good corrosion resistance, cost in 37 DEG C of synthetic perspirations
It is cheap, far below containing gold, palladium, germanium alloy.
1) hardness of cast form of alloy: HV104
2) colour index of alloy: L*=84.68, a*=5.14, b*=14.62 have beautiful pink colour.
3) differential thermal analysis curve of alloy is as shown in Figure 2: melting range is 755.0-790.1 DEG C, is very suitable to using stone
Paste type hot investment casting.
4) polarization curve and corrosion resistance of alloy: in 37 DEG C of synthetic perspirations, corrosion potential is -0.53v, pitting potential
For -0.1V, there is good anti-corrosion discoloration-resisting.
Embodiment 3
A kind of embodiment of jewellery of the present invention pink colour silver alloy, jewellery pink colour silver alloy packet described in the present embodiment
Ingredient containing following mass percentage:
33.10wt% silver, 61.50wt% copper, 3.00wt% zinc, 0.60wt% silicon, 0.30wt% beryllium, 0.50wt% cobalt,
0.80wt% tin, 0.10wt% yttrium and other inevitable impurity.
One kind of the pink colour silver alloy of jewellery described in the present embodiment the preparation method is as follows:
(1) alloyage
1) intermediate alloy is prepared: the anaerobic fine copper that selects copper content for 99.95wt%, the gold that amount containing cobalt is 99.99wt%
Belong to cobalt, the gold that the metallic silicon that silicon content is 99.8wt%, the metallic yttrium that amount containing yttrium is 99.9wt%, stanniferous amount are 99.95wt%
Belong to tin, prepares the copper yttrium of the copper-cobalt alloy of the 10wt% containing cobalt, the cupro silicon of siliceous 10wt%, the 5wt% containing yttrium with them respectively
The copper-tin alloy of alloy, stanniferous 10wt%, these intermediate alloys smelting and pouring ingot under vacuum protection atmosphere.
2) it is for anaerobic fine copper, the zinc content of 99.95wt% for the fine silver of 99.95wt%, copper content with silver content
The H70 brass of 29.8wt%, the casting beryllium-bronze Cu-2Be-0.5Co-0.3Si of the 2wt% containing beryllium and previous step preparation
Intermediate alloy be raw material, prepare pink colour silver alloy of the invention, match as follows:
33.2wt% fine silver, 22.5wt% anaerobic fine copper, 10.6wt%H70 brass, 4.8wt% cupro silicon,
15.1wt% beryllium copper, 8.1wt% copper-tin alloy, 2.1wt% copper yittrium alloy, 4.3wt% copper-cobalt alloy.
(2) melting and casting
The raw material prepared in proportion and intermediate alloy are placed in graphite crucible, -0.1MPa is evacuated down to, then fills
Enter industrial straight argon.It is all melting down to furnace charge using vacuum induction melting, after temperature component is uniform, molten metal is poured into steel ingot
In mould, pink colour silver alloy ingot casting is obtained.By ingot casting cleaning, drying, that is, it can be used as Jewelry casting or stamping raw material.
The pink colour silver alloy that the present embodiment is prepared has color pink bright, and hardness is moderate, meets jewellery forming and inlays
It is required that the fusing point of alloy is suitble to using precision casting process, alloy has good corrosion resistance, cost in 37 DEG C of synthetic perspirations
It is cheap, far below containing gold, palladium, germanium alloy.
1) hardness of cast form of alloy: HV108
2) colour index of alloy: L*=83.77, a*=4.23, b*=15.16 have beautiful pink colour.
3) melting range of alloy is 761.6-781.0 DEG C, is very suitable to using plaster precision foundry.
4) corrosion resistance of alloy: in 37 DEG C of synthetic perspirations, corrosion potential is -0.74V, and pitting potential is -0.08V,
With good anti-corrosion discoloration-resisting.
Embodiment 4
A kind of embodiment of jewellery of the present invention pink colour silver alloy, jewellery pink colour silver alloy packet described in the present embodiment
Ingredient containing following mass percentage:
42.50wt% silver, 55.00wt% copper, 1.50wt% zinc, 0.10wt% silicon, 0.20wt% beryllium, 0.30wt% cobalt,
0.30wt% tin, 0.05wt% yttrium and other inevitable impurity.
One kind of the pink colour silver alloy of jewellery described in the present embodiment the preparation method is as follows:
(1) alloyage
1) intermediate alloy is prepared: the anaerobic fine copper that selects copper content for 99.95wt%, the gold that amount containing cobalt is 99.99wt%
Belong to the gold that cobalt, the metallic silicon that silicon content is 99.8wt%, the metallic yttrium that amount containing yttrium is 99.9wt%, stanniferous amount are 99.95wt%
Belong to tin, prepares the copper yttrium of the copper-cobalt alloy of the 10wt% containing cobalt, the cupro silicon of siliceous 10wt%, the 5wt% containing yttrium with them respectively
The copper-tin alloy of alloy, stanniferous 10wt%, these intermediate alloys smelting and pouring ingot under vacuum protection atmosphere.
2) it is for anaerobic fine copper, the zinc content of 99.95wt% for the fine silver of 99.95wt%, copper content with silver content
The H70 brass of 29.8wt%, the casting beryllium-bronze Cu-2Be-0.5Co-0.3Si of the 2wt% containing beryllium and previous step preparation
Intermediate alloy be raw material, prepare pink colour silver alloy of the invention, match as follows:
42.6wt% fine silver, 35.6wt% anaerobic fine copper, 5.3wt%H70 brass, 0.3wt% cupro silicon, 10.2wt%
Beryllium copper, 3.1wt% copper-tin alloy, 1.1wt% copper yittrium alloy, 2.5wt% copper-cobalt alloy.
(2) melting and casting
The raw material prepared in proportion and intermediate alloy are placed in graphite crucible, -0.1MPa is evacuated down to, then fills
Enter industrial straight argon.It is all melting down to furnace charge using vacuum induction melting, after temperature component is uniform, molten metal is poured into steel ingot
In mould, pink colour silver alloy ingot casting is obtained.By ingot casting cleaning, drying, that is, it can be used as Jewelry casting or stamping raw material.
The pink colour silver alloy that the present embodiment is prepared has color pink bright, and hardness is moderate, meets jewellery forming and inlays
It is required that the fusing point of alloy is suitble to using precision casting process, alloy has good corrosion resistance, cost in 37 DEG C of synthetic perspirations
It is cheap, far below containing gold, palladium, germanium alloy.
1) hardness of cast form of alloy: HV104
2) colour index of alloy: L*=84.26, a*=3.87, b*=15.73 have beautiful pink colour.
3) melting range of alloy is 752.4-787.6 DEG C, is very suitable to using plaster precision foundry.
4) corrosion resistance of alloy: in 37 DEG C of synthetic perspirations, corrosion potential is -0.76V, and pitting potential is -0.13V,
With good anti-corrosion discoloration-resisting.
Embodiment 5
A kind of embodiment of jewellery of the present invention pink colour silver alloy, jewellery pink colour silver alloy packet described in the present embodiment
Ingredient containing following mass percentage:
37.91wt% silver, 58.85wt% copper, 1.75wt% zinc, 0.31wt% silicon, 0.22wt% beryllium, 0.43wt% cobalt,
0.45wt% tin, 0.08wt% yttrium and other inevitable impurity.
One kind of the pink colour silver alloy of jewellery described in the present embodiment the preparation method is as follows:
(1) alloyage
1) intermediate alloy is prepared: the anaerobic fine copper that selects copper content for 99.95wt%, the gold that amount containing cobalt is 99.99wt%
Belong to the gold that cobalt, the metallic silicon that silicon content is 99.8wt%, the metallic yttrium that amount containing yttrium is 99.9wt%, stanniferous amount are 99.95wt%
Belong to tin, prepares the copper yttrium of the copper-cobalt alloy of the 10wt% containing cobalt, the cupro silicon of siliceous 10wt%, the 5wt% containing yttrium with them respectively
The copper-tin alloy of alloy, stanniferous 10wt%, these intermediate alloys smelting and pouring ingot under vacuum protection atmosphere.
2) it is for anaerobic fine copper, the zinc content of 99.95wt% for the fine silver of 99.95wt%, copper content with silver content
The H70 brass of 29.8wt%, the casting beryllium-bronze Cu-2Be-0.5Co-0.3Si of the 2wt% containing beryllium and previous step preparation
Intermediate alloy be raw material, prepare pink colour silver alloy of the invention, match as follows:
38wt% fine silver, 33wt% anaerobic fine copper, 6.2wt%H70 brass, 2.3wt% cupro silicon, 11.3wt% beryllium
Copper, 4.5wt% copper-tin alloy, 1.6wt% copper yittrium alloy, 3.8wt% copper-cobalt alloy.
(2) melting and casting
The raw material prepared in proportion and intermediate alloy are placed in graphite crucible, -0.1MPa is evacuated down to, then fills
Enter industrial straight argon.It is all melting down to furnace charge using vacuum induction melting, after temperature component is uniform, molten metal is poured into steel ingot
In mould, pink colour silver alloy ingot casting is obtained.By ingot casting cleaning, drying, that is, it can be used as Jewelry casting or stamping raw material.
The pink colour silver alloy that the present embodiment is prepared has color pink bright, and hardness is moderate, meets jewellery forming and inlays
It is required that the fusing point of alloy is suitble to using precision casting process, alloy has good corrosion resistance, cost in 37 DEG C of synthetic perspirations
It is cheap, far below containing gold, palladium, germanium alloy.
1) hardness of cast form of alloy: HV105
2) colour index of alloy: L*=83.58, a*=4.92, b*=14.84 have beautiful pink colour.
3) melting range of alloy is 758.8-792.3 DEG C, is very suitable to using plaster precision foundry.
4) corrosion resistance of alloy: in 37 DEG C of synthetic perspirations, corrosion potential is -0.56V, and pitting potential is -0.11V,
With good anti-corrosion discoloration-resisting.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (7)
1. a kind of jewellery pink colour silver alloy, which is characterized in that the pink colour silver alloy is by silver, copper, silicon, cobalt, zinc, beryllium, tin, yttrium
And other inevitable impurity compositions, the ingredient of mass percentage: silver 33.10~42.50%, copper 55.00~
61.50%；The ratio of the mass percentage of the copper and silver is 1.3~1.86；The mass percentage of the silicon is 0.10
~0.60%；The mass percentage of the cobalt is 0.26~0.50%, the mass percentage of the zinc is 1.50~
3.00%, the mass percentage of the beryllium is 0.20~0.30%, and the mass percentage of the tin is 0.30~0.80%,
The mass percentage of the yttrium is 0.05~0.10%.
2. jewellery as described in claim 1 pink colour silver alloy, which is characterized in that the silver alloy is contained by following weight percent
Amount at being grouped as: 34.91wt% silver, 60.24wt% copper, 3.00wt% zinc, 0.56wt% silicon, 0.25wt% beryllium,
0.39wt% cobalt, 0.50wt% tin, 0.06wt% yttrium and other inevitable impurity.
3. jewellery as described in claim 1 pink colour silver alloy, which is characterized in that the silver alloy is contained by following weight percent
Amount at being grouped as: 39.90wt% silver, 57.12wt% copper, 1.97wt% zinc, 0.12wt% silicon, 0.25wt% beryllium,
0.26wt% cobalt, 0.30wt% tin, 0.06wt% yttrium and other inevitable impurity.
4. jewellery as described in claim 1 pink colour silver alloy, which is characterized in that the silver alloy is contained by following weight percent
Amount at being grouped as: 33.10wt% silver, 61.50wt% copper, 3.00wt% zinc, 0.60wt% silicon, 0.30wt% beryllium,
0.50wt% cobalt, 0.80wt% tin, 0.10wt% yttrium and other inevitable impurity.
5. jewellery as described in claim 1 pink colour silver alloy, which is characterized in that the silver alloy is contained by following weight percent
Amount at being grouped as: 42.50wt% silver, 55.00wt% copper, 1.50wt% zinc, 0.10wt% silicon, 0.20wt% beryllium,
0.30wt% cobalt, 0.30wt% tin, 0.05wt% yttrium and other inevitable impurity or 37.91wt% silver,
58.85wt% copper, 1.75wt% zinc, 0.31wt% silicon, 0.22wt% beryllium, 0.43wt% cobalt, 0.45wt% tin, 0.08wt%
Yttrium and other inevitable impurity.
6. a kind of preparation method of jewellery as claimed in any one of claims 1 to 5 pink colour silver alloy, which is characterized in that institute
State method are as follows: raw material is placed in crucible, is vacuumized, applying argon gas, melting is then carried out, it is all melting down to furnace charge, by metal
Liquid is poured into ingot mould, obtains pink colour silver alloy ingot casting, by ingot casting cleaning, drying to get jewellery pink colour silver alloy.
7. the jewellery as claimed in claim 6 preparation method of pink colour silver alloy, which is characterized in that the raw material includes following
The ingredient of mass percentage: fine silver 33.2~42.6%, anaerobic fine copper 22.5~35.6%, brass 5.3~10.7%, copper silicon
Alloy 0.3~4.8%, beallon 10.2~15.1%, copper-tin alloy 3.1~8.1%, copper yittrium alloy 1.1~2.1%, copper
Cobalt alloy 2.5~4.3%.
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| CN115747561B (en) * | 2022-11-04 | 2023-12-12 | 广州番禺职业技术学院 | Wear-resistant corrosion-resistant jewelry brass alloy and preparation method thereof |
| CN115679152B (en) * | 2022-11-04 | 2023-08-25 | 广州番禺职业技术学院 | Decorative brass alloy with excellent casting performance and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100999792A (en) * | 2006-09-20 | 2007-07-18 | 番禺职业技术学院 | Anti discolour silver alloy |
| RU2384635C1 (en) * | 2009-06-19 | 2010-03-20 | Юлия Алексеевна Щепочкина | Copper based alloy |
| CN102876916A (en) * | 2012-09-27 | 2013-01-16 | 杭州震达五金机械有限公司 | Argentiferous gold-simulating copper alloy and preparation method thereof |
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|---|---|---|---|---|
| CN100999792A (en) * | 2006-09-20 | 2007-07-18 | 番禺职业技术学院 | Anti discolour silver alloy |
| RU2384635C1 (en) * | 2009-06-19 | 2010-03-20 | Юлия Алексеевна Щепочкина | Copper based alloy |
| CN102876916A (en) * | 2012-09-27 | 2013-01-16 | 杭州震达五金机械有限公司 | Argentiferous gold-simulating copper alloy and preparation method thereof |
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