CN108866377A - Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance - Google Patents
Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance Download PDFInfo
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- CN108866377A CN108866377A CN201810868793.7A CN201810868793A CN108866377A CN 108866377 A CN108866377 A CN 108866377A CN 201810868793 A CN201810868793 A CN 201810868793A CN 108866377 A CN108866377 A CN 108866377A
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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
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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
- C22C5/06—Alloys based on silver
- C22C5/08—Alloys based on silver with copper as the next major constituent
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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 invention discloses silver alloy and its processing technology that hydrogen sulfide corrosion-resistant discoloration has red appearance.According to weight percent, the ingredient of the alloy is:B:0.1-0.2wt.%,Sc:0.6-0.8wt.%,Ti:1.2-1.4wt.%,V:0.2-0.4wt.%,In:12.0-15.0wt.%,Ta:0.8-1.2wt.%,Cu:30.0-32.0wt.%, surplus are silver.The material provides a kind of solution of materialogy for the silver alloy of the standby red perception of China's findings, and the product has the characteristic of excellent hydrogen sulfide corrosion-resistant blackening.The implementation and industrialization of the material can fetter the insufficient status of color silver-colored field product category with effective solution, and future will can obtain plentiful and substantial economic gain and social benefit.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of silver alloy.
Background technique
The mankind have found and have thousands of years using the history of silver and silver alloy, the silver jewellery of most ancient existing more than 5000 years history
It is that Iraq in today finds.Away from the present, oneself has more than 4000 years history to the unearthed earliest Silver Jewelry in China.Silver Jewelry is more
The imperial crown and jade print of emperor are appeared in, and becomes flaunt one's wealth power and status symbol.Although Silver Jewelry price is less high
It is expensive, but silvery jewellery quality is also very excellent.Because silver has good ductility, and compares flexible, so silvery is first
The style of decorations much becomes, its color also compares fashion, can be collocated with each other with the material of other types.
Jewelry needs to improve the hardness of alloy, to meet the requirement of wearability.Some jewelry structural members, as ear acupuncture,
Tack, brooch, spring etc., it is desirable that have good elasticity, it is similarly desirable to increase the hardness of alloy.Fine silver is too soft, needs that alloy is added
Element forms silver alloy and carries out improved properties.Alloying is carried out in silver and under the premise of improve intensity and hardness, silver alloy can be with
For meeting the requirement inlayed.Since the raising of jewellery silver alloy hardness promotes the fast development of jewellery industry, also change
Become the processing technology of original backwardness, can with mass production, along with the material inlayed is synthesized using high-tech, reach with naturally
True and false difficult point of the degree of high-grade product.Therefore, the combination of alloy and different inlaid materials keeps the style of silver jewellery more abundant
Colorful, up to tens of thousands of kinds, ten tens of thousands of kinds, its novelty, aesthetic feeling completely can be with times.For objectively, silver jewellery was both protected
The appearance of noble metal has been held, and has been substantially reduced for cost, has popularized the product rapidly.
Very regrettably, although silver-colored chemical property is stablized, Silver Jewelry is exposed under atmospheric environment substantially, just
Inevitably reacts with certain ingredients in air and make silver surface blackening and generate corrosion.When containing ten thousand in air
As soon as/ hydrogen sulfide or sulphion when, silver jewellery blackening in a short period of time can be made, Surface Creation vulcanization
Silver.The serious market sales volume and popularization that restrict silver jewellery of this status.
Current processing method generally uses overlay coating and basic asphalt mixture.（1）For overlay coating, although
Silver jewellery surface can plate one layer of very thin rhodium to carry out preventing sulphide staining.But these coating can not be kept away in daily life
That exempts from is worn, and exposed silver matrix is corroded and sulphide staining.Thus such silver jewellery using after 6 months just
Inevitably black, reduces the use perception of silver jewellery.（2）It is corrosion-resistant in silver alloy Surface Creation that alloying is carried out at present
For layer there is no obtaining complete success, it is bad that these alloys are not as processing performance, is easy cracking, is exactly because of casting character
It is bad and show big cavity and be mingled with, so that the yield of product is very low.
Thus, the sulfidation corrosion of silver jewellery can be overcome completely currently on the market, and take into account the silver alloy of processing performance
Material is extremely rare.In addition, silver jewellery surface color is only limited to white at present, and complete colored silver is not formed
Alloy series.Silver jewellery in the market will obtain the surface different from white, it is necessary to carry out surface painting by the method for overlay coating
Plating.But these coating, the base alloy of silver is also inevitably leaked out due to abrasion after using some months, thus connect
The sulphide staining to get off is also inevitable.
The gold jewelry jewellery consumption in China is developed so far from early 1980s, experienced several developing stage:Development is just
Phase focuses on value preserving effect to buy based on ornaments, but style, style changes little, kind are dull.It is first since the nineties
Decorations start largely to appear on the market, and growth momentum is swift and violent, but consumption idea still focuses on the value of jewellery.In recent years, people disappeared
Take idea to be changed, pursues personalization by focusing on being worth turning to, be particular about style, the technique of jewellery, be particular about jewellery and itself
Individual character, dress matching, in addition science and technology progress, processing of ornament make new technology, new process continuous application, greatly
Enrich jewellery material market.For silver jewellery due to cheap, style is modish, and various colors, price is low, diversification, personalized
Style meet consumer demand, and therefore it is also continued to develop.Thus, exploitation has particular color and has excellent
Different corrosion resistance and the jewellery silver alloy for preventing sulphide staining, not only can solve industry problems, also obtain market breakthroughs
While with huge sales volume is obtained, the rapid development of relevant industries is realized.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides the silver that hydrogen sulfide corrosion-resistant discoloration has red appearance
Alloy and its processing technology.
To achieve the goals above, the present invention adopts the following technical scheme that：
Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance.By weight percentage, the group of alloy
As B:0.1-0.2wt.%,Sc:0.6-0.8wt.%,Ti:1.2-1.4wt.%,V:0.2-0.4wt.%,In:12.0-
15.0wt.%,Ta:0.8-1.2wt.%,Cu:30.0-32.0wt.%, surplus are silver.
Above-mentioned hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance, includes the following steps：It will
As above the raw material matched is added in the electric induction furnace under ar gas environment, and uses graphite crucible;It is kept the temperature when melting at 1200 degree
It is 10 minutes, 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;Alloy pours
Casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.Resulting ingot casting is rolled at room temperature, often
It is 20-30% that passage, which rolls lower amount,;It is 600 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally material is rolled
At the alloy sheets with a thickness of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates in process
Stress;Wherein, temperature is 400 degree, and the time is 1 hour.
Compared with prior art, the present invention has the advantages that：
（1）For billon jewellery, complete coloured gold ally series is formd by the development of domestic and international many years, and take
Obtained the very big market sales volume.But for silver, it is however generally that be at present mostly the silver alloy of white, and adopt
The white silver jewellery prepared with such alloy.Although the method that can be plated by surface ion carries out the coating work of various colors
Skill, but gained coating is easy to fade and wear, thus the serious development for affecting silver-colored class head jewelry alloy and Related product
Market occupancy volume.The novel silver alloy that simultaneously industrialization has red perception is developed, is expected to provide one kind to jewellery materials industry
The solution of new material.
（2）Volume contraction can occur in casting process for alloy, thus shrinkage cavity occurs in the final solidified part of casting, this
It is to be caused due to the crystallization range of alloy is narrow.The maximum of this kind of defect is characterized in occurring in flakes, shrinkage cavity shape
Shape is in the majority with jujube core and ellipsoid, under the effect of external force, is easily deformed, forms crackle, causes to be broken and collapse, repairs difficulty
It is bigger.The alloy of present patent application protection has loose solidification temperature range, can achieve 820-910 degree.In solidification model
It is cast under conditions of enclosing up to 90 degree, not only can be avoided the formation of shrinkage cavity in casting, it is also possible that the group of casting
It knits and occurs in the form of equiax crystal, avoid the generation of dendrite.In addition, the material has extremely low solidification shrinkage rate, solidifying
Front and back volume change is 1.3-1.5%.Due to volume change very little, thus the more accurate casting that can carry out equidimension adds
Work.In addition, cast(ing) surface is bright and clean, without casting flaws such as apparent sand hole, cinder hole, stomatas, connected between the rib of sieve it is intact,
Any contraction crack is not generated.
（3）The material has red appearance after preparation.When the alloy is used to prepare silver jewellery material, can not only expire
The needs of sufficient special-shaped casting product, moreover it is possible to adapt to various pressure processing products, such as forging and welding etc..Present patent application protection
Silver alloy have extremely excellent mechanics and processing performance.Yield strength can achieve 180- to the material after casting
200MPa, tensile strength maintain 310-340MPa, and elongation percentage is maintained at 45-60%.It, can be with thus in pressing process
Do not have to carry out intermediate annealing using 30% deflection per pass in cold working.Under the premise of greatly simplifying technique, not only
It reduces costs, also reduces energy consumption, there are extremely extensive market prospects.
（4）Silver has extremely strong affinity with the sulphur in air, is containing sulfur dioxide, hydrogen sulfide and carbonyl sulfide etc.
It is easy to generate silver salt in the environment of corrosive gas.As long as the concentration of hydrogen sulfide, which is higher than 0.2ppb, in atmosphere object can make silver alloy
Vulcanization reaction occurs, generates black silver sulfide.The silver alloy of present patent application protection, in addition to improving the hardness of alloy and caning be processed
Property, the anti-tarnishing ability of alloy can also be improved.Its mechanism is that fine and close oxidation film is generated in alloy surface, is covered on alloy table
Its vulcanization is prevented on face.In addition, the addition of alloying element, can also improve anti-tarnishing ability and oxidation resistance, and improve
The ability of alloy anti-natural ageing and softening, and crystal grain can be refined, to improving, alloy anti-tarnishing ability is also helpful.Using the alloy
The silver jewellery of preparation is still generated without significantly fading with surface polishing scratch after using 4 years, and common silver jewellery is using 2
After a month blackening will be generated because of contact hydrogen sulfide or sulphion.The implementation and market sale of the material, will promote
The innovation and development of China's silver jewellery alloy.
Specific embodiment
Embodiment 1
Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance.By weight percentage, the group of alloy
As B:0.1wt.%,Sc:0.6wt.%,Ti:1.2wt.%,V:0.2wt.%,In:12.0wt.%,Ta:0.8wt.%,Cu:
30.0wt.%, surplus are silver.Above-mentioned hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance, including such as
Lower step：As above the raw material matched is added in the electric induction furnace under ar gas environment, and uses graphite crucible;When melting
1200 degree keep the temperature 10 minutes, uniform by Efco-Northrup furnace electromagnetic agitation;It keeps the temperature 1 minute at 1200 degree after mixing evenly and pours and cast out
Furnace;Alloy casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.By resulting ingot casting at room temperature into
Row rolling, rolling lower amount per pass is 20-30%;It is 600 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally
Material is rolled into the alloy sheets with a thickness of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates
Stress in process;Wherein, temperature is 400 degree, and the time is 1 hour.
Promotion of the silver alloy due to having carried out optimizing components and founding, gained alloy have excellent casting
Performance, and melt has good mobility, and oxide is mingled with less.It is conducive to issuable shrinkage cavity during solidification and obtains gold
The supplement for belonging to liquid can also make casting be obstructed in solidification end systole, so that the fire check occurred is obtained making up for metal liquid, have
Conducive to the generation for preventing coagulation defect.The material has red appearance after preparation.When the alloy is used to prepare silver jewellery material
When material, it is not only able to satisfy the needs of special-shaped casting product, moreover it is possible to adapt to various pressure processing products, such as forging and welding etc..
The addition of alloying element can also improve anti-tarnishing ability and oxidation resistance, and improve alloy anti-natural ageing and softening
Ability, and crystal grain can be refined, alloy anti-tarnishing ability is also helpful to improving.It is being used using silver jewellery prepared by the alloy
It is still generated without significantly fading with surface polishing scratch after 4 years, and common silver jewellery will be because of contact after using 2 months
Hydrogen sulfide or sulphion and generate blackening.
Embodiment 2
Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance.By weight percentage, the group of alloy
As B:0.2wt.%,Sc:0.8wt.%,Ti:1.4wt.%,V:0.4wt.%,In:15.0wt.%,Ta:1.2wt.%,Cu:
32.0wt.%, surplus are silver.Above-mentioned hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance, including such as
Lower step：As above the raw material matched is added in the electric induction furnace under ar gas environment, and uses graphite crucible;When melting
1200 degree keep the temperature 10 minutes, uniform by Efco-Northrup furnace electromagnetic agitation;It keeps the temperature 1 minute at 1200 degree after mixing evenly and pours and cast out
Furnace;Alloy casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.By resulting ingot casting at room temperature into
Row rolling, rolling lower amount per pass is 20-30%;It is 600 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally
Material is rolled into the alloy sheets with a thickness of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates
Stress in process;Wherein, temperature is 400 degree, and the time is 1 hour.
Promotion of the silver alloy due to having carried out optimizing components and founding, gained alloy have excellent casting
Performance, and melt has good mobility, and oxide is mingled with less.It is conducive to issuable shrinkage cavity during solidification and obtains gold
The supplement for belonging to liquid can also make casting be obstructed in solidification end systole, so that the fire check occurred is obtained making up for metal liquid, have
Conducive to the generation for preventing coagulation defect.The material has red appearance after preparation.When the alloy is used to prepare silver jewellery material
When material, it is not only able to satisfy the needs of special-shaped casting product, moreover it is possible to adapt to various pressure processing products, such as forging and welding etc..
The addition of alloying element can also improve anti-tarnishing ability and oxidation resistance, and improve alloy anti-natural ageing and softening
Ability, and crystal grain can be refined, alloy anti-tarnishing ability is also helpful to improving.It is being used using silver jewellery prepared by the alloy
It is still generated without significantly fading with surface polishing scratch after 4 years, and common silver jewellery will be because of contact after using 2 months
Hydrogen sulfide or sulphion and generate blackening.
Embodiment 3
Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance.By weight percentage, the group of alloy
As B:0.1wt.%,Sc:0.7wt.%,Ti:1.3wt.%,V:0.3wt.%,In:14.0wt.%,Ta:0.9wt.%,Cu:
31.0wt.%, surplus are silver.Above-mentioned hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance, including such as
Lower step：As above the raw material matched is added in the electric induction furnace under ar gas environment, and uses graphite crucible;When melting
1200 degree keep the temperature 10 minutes, uniform by Efco-Northrup furnace electromagnetic agitation;It keeps the temperature 1 minute at 1200 degree after mixing evenly and pours and cast out
Furnace;Alloy casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.By resulting ingot casting at room temperature into
Row rolling, rolling lower amount per pass is 20-30%;It is 600 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Finally
Material is rolled into the alloy sheets with a thickness of 10-20mm;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates
Stress in process;Wherein, temperature is 400 degree, and the time is 1 hour.
Promotion of the silver alloy due to having carried out optimizing components and founding, gained alloy have excellent casting
Performance, and melt has good mobility, and oxide is mingled with less.It is conducive to issuable shrinkage cavity during solidification and obtains gold
The supplement for belonging to liquid can also make casting be obstructed in solidification end systole, so that the fire check occurred is obtained making up for metal liquid, have
Conducive to the generation for preventing coagulation defect.The material has red appearance after preparation.When the alloy is used to prepare silver jewellery material
When material, it is not only able to satisfy the needs of special-shaped casting product, moreover it is possible to adapt to various pressure processing products, such as forging and welding etc..
The addition of alloying element can also improve anti-tarnishing ability and oxidation resistance, and improve alloy anti-natural ageing and softening
Ability, and crystal grain can be refined, alloy anti-tarnishing ability is also helpful to improving.It is being used using silver jewellery prepared by the alloy
It is still generated without significantly fading with surface polishing scratch after 4 years, and common silver jewellery will be because of contact after using 2 months
Hydrogen sulfide or sulphion and generate blackening.
Claims (3)
1. hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance；By weight percentage, alloy
Group becomes B:0.1-0.2wt.%,Sc:0.6-0.8wt.%,Ti:1.2-1.4wt.%,V:0.2-0.4wt.%,In:12.0-
15.0wt.%,Ta:0.8-1.2wt.%,Cu:30.0-32.0wt.%, surplus are silver.
2. hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance according to claim 1, special
Sign is to include following smelting step：As above the raw material matched is added in the electric induction furnace under ar gas environment, and uses stone
Black crucible;10 minutes are kept the temperature at 1200 degree when melting, it is uniform by Efco-Northrup furnace electromagnetic agitation;It is protected after mixing evenly at 1200 degree
Temperature 1 minute and cast come out of the stove;Alloy casting uses the punching block of diameter 50-100mm, and is cooled down by the way of water cooling.
3. hydrogen sulfide corrosion-resistant discoloration has the silver alloy and its processing technology of red appearance according to claim 1, special
Sign is comprising using step as follows：Resulting ingot casting is rolled at room temperature, rolling lower amount per pass is 20-30%;Every two
Intermediate anneal temperature is 600 degree after secondary rolling, keeps the temperature 0.5 hour;Material is finally rolled into the alloy with a thickness of 10-20mm
Plate;It in jewellery forming process, needs to carry out intermediate annealing process, eliminates the stress in process;Wherein, temperature 400
Degree, time are 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868793.7A CN108866377A (en) | 2018-08-02 | 2018-08-02 | Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868793.7A CN108866377A (en) | 2018-08-02 | 2018-08-02 | Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance |
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| Publication Number | Publication Date |
|---|---|
| CN108866377A true CN108866377A (en) | 2018-11-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810868793.7A Withdrawn CN108866377A (en) | 2018-08-02 | 2018-08-02 | Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance |
Country Status (1)
| Country | Link |
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| CN (1) | CN108866377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106389A (en) * | 2019-05-20 | 2019-08-09 | 杭州辰卓科技有限公司 | A kind of martensitic traoformation type jewellery silver alloy and its processing technology |
-
2018
- 2018-08-02 CN CN201810868793.7A patent/CN108866377A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106389A (en) * | 2019-05-20 | 2019-08-09 | 杭州辰卓科技有限公司 | A kind of martensitic traoformation type jewellery silver alloy and its processing technology |
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Application publication date: 20181123 |
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