CN108660334A - One kind having aging stability and corrosion resistant 22K gold billon - Google Patents
One kind having aging stability and corrosion resistant 22K gold billon Download PDFInfo
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- CN108660334A CN108660334A CN201810694676.3A CN201810694676A CN108660334A CN 108660334 A CN108660334 A CN 108660334A CN 201810694676 A CN201810694676 A CN 201810694676A CN 108660334 A CN108660334 A CN 108660334A
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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
- C22C5/02—Alloys based on gold
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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Abstract
The invention discloses one kind having aging stability and corrosion resistant 22K gold billon.By weight percentage, the group of alloy becomes Sr:Sr:0.4‑0.5wt.%,Mg:2.0‑2.5wt.%,Mo:0.2‑0.4wt.%,Sc:0.4‑0.6wt.%,Ta:0.6‑0.8wt.%,Au:90.0 92.0wt.%, surplus are copper.The patent solves not satisfactory enough the and backward in technique present situation of current 22K gold mechanical property.The development bottleneck of jewellery 22K gold is broken through by the innovation and optimization of alloying component.It is contemplated that the implementation and industrialization of the material 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 billon.
Background technology
Gold is a kind of precious metal, is one of the metal that the mankind have found and develop and use earliest.It is make jewellery and
The important source material of coin, and be the important stockpile of country, element is famous with the king of metal.It is not considered only as fine and rich
Symbol, but also with its distinctive value, the life brought benefit to the mankind.One important applied field of gold is decoration material
Material, including jewellery etc..Soft gold is easily deformed, and is also easy to wear.Therefore, people begin to attempt to add in proof gold
Enter a small amount of other alloying elements to increase the hardness of gold, increases wherein silver, copper, zinc etc. are all existing frequently-used are added in gold
The metal of reinforcement degree and toughness.Add the gold of alloying element, that is, billon.
Billon is also referred to as karat gold, is alloy made of a small amount of other metal alloyings are added in gold according to a certain percentage.It presses
How much gold content is divided into 24K gold, 22K gold, 18K gold, 14K gold etc..The gold of theoretically 100% purity is called 24K by international standard
Gold, 1K gold contents are about that 4.166%, 22K gold refers to just the gold ornament that gold content is 22K.22K gold gold contents are about 91.6%.
According to the standard of country, the gold content of 24K gold should be that absolutely, but golden without pure gold, the gold content of 24K gold is exactly to contain
The gold that gold amount reaches 99.96wt% is referred to as 24K gold, also referred to as thousand pure golds.Different gold content just has different hardness
With different colors.
With 24K metallographic ratios, 22K gold utensils have the characteristics that a series of new.1) in appearance：22K gold utensils have stronger than 24K gold
Color and gold texture, agree with of long standing and well established golden of compatriots and worship.2) plasticity：22K gold solves that 24K is golden soft to be asked
Topic has plasticity strong as 18K gold, can be competent at complicated technology jewelry manufacture, be suitble to design and develop more modish fashion
Style, even if for a long time wear be not easy to deformed damaged.3) upstart：As the fashion upstart in gold family, 22K gold is at present
Blue sea market field is still fallen within, and has merged the style feature of the noble color and 18K gold of 24K gold, can ideally meet the common people to Huang
The dual requirements of golden plot and stylistic features.
But presently, the performance boost of 22K gold be realized by alloying, wherein gold content be 91.6%,
Its alloying element is mostly silver and copper.These alloying elements, due to having great solid solubility, thus final 22K with gold utensil
Gold is after manufacture or initial stage for using is single-phase fcc states.Since the difference of the atomic radius and gold of silver and copper is little, and
And copper, silver and the chemical property of gold are also similar, thus solution strengthening effect is not big enough, will not generate or can be only generated minute quantity
Intermetallic compound carry out second-phase strength.In conclusion the mechanical property of current 22K gold is preparing bigger head
When decorations, existing demand is fully met.But some jewellery parts with small diameter, such as the feather lamp of bird are being prepared,
Due to not enough intensity, these components are easy to that the deformation after long-time use occurs after preparation.This problem for
22K gold is especially prominent with alloy, and manufacturer is frequently subjected to the puzzlement of this problem.
The normal temperature strength and toughness deficiency of 22K gold have been the inevitable problems of field of jewelry, for a long time both at home and abroad
Enterprise and research institution carried out many trials and studied very much.But it is permanent the study found that keeping single-phase fcc states and dimension
It is extremely difficult to hold high mechanical strength.By add alloying element formed the second phase strengthened it is not difficult, but second
Phase precipitate becomes the source of corrosion instead.Mildew phenomenon will occur after long periods of wear for this alloy jewellery, be exactly by
Corrosiveness is generated in sweat and these Second Phase Precipitation objects, 22K gold surfaces is caused to generate caused by the spot of discoloration.By advanced
Design of material technology alloy material can be innovated by the thermodynamics and kinetics means of bottom, and to 22K
The intensity deficiency of gold and the solution and industrialization of generation etching problem have prodigious market value.In face of the state being growing more intense
Border domestic market competes, it is necessary to and paces of accelerating restructuring, this is not only the needs of China's jewellery industry survival and development, and
The development trend of world today's related field.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of with aging stability and corrosion resistant 22K
Gold billon.
To achieve the goals above, the present invention adopts the following technical scheme that：
One kind having aging stability and corrosion resistant 22K gold billon.By weight percentage, the group of alloy becomes Sr:
0.4-0.5wt.%,Mg:2.0-2.5wt.%,Mo:0.2-0.4wt.%,Sc:0.4-0.6wt.%,Ta:0.6-0.8wt.%,Au:
90.0-92.0wt.%, surplus are copper.
A kind of above-mentioned preparation method with aging stability and corrosion resistant 22K gold billon, includes the following steps：
As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Low stream is used after metal molten
The argon gas of amount is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1050 degree when melting, leans on high frequency sense
Answer stove electromagnetic agitation uniform;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting uses diameter 100-
The punching block of 200mm, and cooled down by the way of water cooling.The ingot casting of gained is rolled at room temperature, every time rolls lower amount and is
30-40%;It is 680 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;It is 10- that material, which is finally rolled into thickness,
The golden plate of 20mm;In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Wherein,
It is 800 degree to homogenize temperature, and the time is 1-2 hours.
Compared with prior art, the present invention has the advantages that：
（1）Due to being added to Cu, the elements such as Ag, Sn, acting type alloy when belonging in traditional 22K gold.Thus after production and processing
Also in the single phase of fcc, with the increase of usage time at normal temperatures, precipitate is constantly grown up, and quantity increases.Due to
The interface of two-phase and matrix is more active, is the source of corrosion.Thus, in use, second, which meets, corrodes, in head
It adorns surface and forms corrosion pit, the serious appearance and usage experience for affecting jewellery.In addition, over time, tradition
The mechanical performance of 22K gold is unstable, and often yield strength and tensile strength rises, and elongation percentage is remarkably decreased, when causing
Billon jewellery after effect crack in use, seriously affect the quality of production.The 22K gold of present patent application protection is used
Billon can be fully solved the above problem by advanced alloying process.It is usually controlled by introducing the member such as Sr, Mg and Mo
The forming core and growth process of second phase on the basis of not changing existing mechanical property in use, can make alloy
Timeliness speed reduce by 10 times or more.Due to inhibiting the dynamic process of alloy, which does not have 10 years after being prepared into jewellery
It is found the formation of surface corrosion spot, does not also have brittle failure phenomenon.
（2）By screening alloying element and limiting its content, crystal grain thinning can be played, prevents from being segregated, stomata is eliminated, goes
The effects that except impurity and improving tissue.In addition, the increase in liquidus temperature section, increases the degree of supercooling in alloy graining process,
It may advantageously facilitate forming core, crystal grain thinning.Simultaneously as aluminium alloy liquidus temperature declines less, the enlarged meeting of liquidus temperature section is led
Cause the adverse effects such as alloy macrosegregation, alloy flowability are deteriorated and hot cracking tendency increases.The billon of present patent application protection
Crystal grain is set to be refined.In addition, the alloy has low liquid-solid phase solidification temperature range, hot cracking tendency when casting can be solved
Greatly, casting cavity is low with loose apparent product yield rate waits technical barriers.Smelting processing method is simple, and production cost is relatively low,
It reduces to equipment requirement.
（3）The alloy forms a large amount of equiax crystal when solidification.The addition of alloying element so that rich when crystallization
The solute atoms of collection generates big constitutional supercooling, is conducive to crystal grain thinning.In addition, when generating columnar dendrite shape due to composition fluctuations
Cheng Shi, soluterich promote dendrite constriction in dendrite root, become free crystalline substance and promote forming core, form equiaxed crystal.It can be seen that this
The screening of proprietary alloy element can make melt big constitutional supercooling occur in solid-liquid forward position in solidification, can make alloy graining
Crystallization mode changes, to play strengthening effect caused by promoting crystal grain refinement to alloy.It is contemplated that the reality of the material
It applies and obtains excellent economic benefit and social benefit after all with industrialization.
Specific implementation mode
Embodiment 1
One kind having aging stability and corrosion resistant 22K gold billon.By weight percentage, the group of alloy becomes Sr:
0.4wt.%,Mg:2.0wt.%,Mo:0.2wt.%,Sc:0.4wt.%,Ta:0.6wt.%,Au:90.0wt.%, surplus are copper.It is above-mentioned
A kind of preparation method with aging stability and corrosion resistant 22K gold billon, includes the following steps：By what is as above matched
Raw material is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is protected using the argon gas of low discharge after metal molten,
Big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1050 degree when melting, leans on Efco-Northrup furnace electromagnetic agitation
Uniformly;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting uses the punching block of diameter 100-200mm,
And cooled down by the way of water cooling.The ingot casting of gained is rolled at room temperature, it is 30-40% that every time, which rolls lower amount,;Per twice
Intermediate anneal temperature is 680 degree after rolling, keeps the temperature 0.5 hour;Material is finally rolled into the golden plate that thickness is 10-20mm;
In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Wherein, homogenization temperature 800
Degree, time are 1-2 hours.
The alloy usually controls the forming core and growth process of the second phase by introducing the member such as Sr, Mg and Mo, is using process
In do not change existing mechanical property on the basis of, the timeliness speed of alloy can be made to reduce by 10 times or more.Due to inhibiting
The dynamic process of alloy, the alloy do not find the formation of surface Staining, without brittle failure 10 years after being prepared into jewellery yet
Phenomenon occurs.In addition, the alloy has low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
The low equal technical barriers of empty and loose apparent product yield rate.Smelting processing method is simple, and production cost is relatively low, reduces pair
Equipment requirement.
Embodiment 2
One kind having aging stability and corrosion resistant 22K gold billon.By weight percentage, the group of alloy becomes Sr:
0.5wt.%,Mg:2.5wt.%,Mo:0.4wt.%,Sc:0.6wt.%,Ta:0.8wt.%,Au:92.0wt.%, surplus are copper.It is above-mentioned
A kind of preparation method with aging stability and corrosion resistant 22K gold billon, includes the following steps：By what is as above matched
Raw material is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is protected using the argon gas of low discharge after metal molten,
Big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1050 degree when melting, leans on Efco-Northrup furnace electromagnetic agitation
Uniformly;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting uses the punching block of diameter 100-200mm,
And cooled down by the way of water cooling.The ingot casting of gained is rolled at room temperature, it is 30-40% that every time, which rolls lower amount,;Per twice
Intermediate anneal temperature is 680 degree after rolling, keeps the temperature 0.5 hour;Material is finally rolled into the golden plate that thickness is 10-20mm;
In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Wherein, homogenization temperature 800
Degree, time are 1-2 hours.
The alloy usually controls the forming core and growth process of the second phase by introducing the member such as Sr, Mg and Mo, is using process
In do not change existing mechanical property on the basis of, the timeliness speed of alloy can be made to reduce by 10 times or more.Due to inhibiting
The dynamic process of alloy, the alloy do not find the formation of surface Staining, without brittle failure 10 years after being prepared into jewellery yet
Phenomenon occurs.In addition, the alloy has low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
The low equal technical barriers of empty and loose apparent product yield rate.Smelting processing method is simple, and production cost is relatively low, reduces pair
Equipment requirement.
Embodiment 3
One kind having aging stability and corrosion resistant 22K gold billon.By weight percentage, the group of alloy becomes Sr:
0.4wt.%,Mg:2.4wt.%,Mo:0.3wt.%,Sc:0.5wt.%,Ta:0.7wt.%,Au:91.0wt.%, surplus are copper.It is above-mentioned
A kind of preparation method with aging stability and corrosion resistant 22K gold billon, includes the following steps：By what is as above matched
Raw material is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is protected using the argon gas of low discharge after metal molten,
Big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1050 degree when melting, leans on Efco-Northrup furnace electromagnetic agitation
Uniformly;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting uses the punching block of diameter 100-200mm,
And cooled down by the way of water cooling.The ingot casting of gained is rolled at room temperature, it is 30-40% that every time, which rolls lower amount,;Per twice
Intermediate anneal temperature is 680 degree after rolling, keeps the temperature 0.5 hour;Material is finally rolled into the golden plate that thickness is 10-20mm;
In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Wherein, homogenization temperature 800
Degree, time are 1-2 hours.
The alloy usually controls the forming core and growth process of the second phase by introducing the member such as Sr, Mg and Mo, is using process
In do not change existing mechanical property on the basis of, the timeliness speed of alloy can be made to reduce by 10 times or more.Due to inhibiting
The dynamic process of alloy, the alloy do not find the formation of surface Staining, without brittle failure 10 years after being prepared into jewellery yet
Phenomenon occurs.In addition, the alloy has low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, casting
The low equal technical barriers of empty and loose apparent product yield rate.Smelting processing method is simple, and production cost is relatively low, reduces pair
Equipment requirement.
Claims (3)
1. one kind having aging stability and corrosion resistant 22K gold billon；According to weight percent, the ingredient of the alloy
For: Sr:0.4-0.5wt.%,Mg:2.0-2.5wt.%,Mo:0.2-0.4wt.%,Sc:0.4-0.6wt.%,Ta:0.6-
0.8wt.%,Au:90.0-92.0wt.%, surplus are copper.
2. a kind of described in claim 1 have aging stability and corrosion resistant 22K gold billon, it is characterised in that including such as
Lower smelting step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Metal molten
It uses the argon gas of low discharge to protect afterwards, big air-flow is avoided to make the serious scaling loss of alloying element;10 points are kept the temperature when melting at 1050 degree
Clock, it is uniform by Efco-Northrup furnace electromagnetic agitation;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon is cast
Using the punching block of diameter 100-200mm, and cooled down by the way of water cooling.
3. there is aging stability and corrosion resistant 22K gold billon according to a kind of described in claim 1, it is characterised in that include
Step is used as follows：The ingot casting of gained is rolled at room temperature, it is 30-40% that every time, which rolls lower amount,;In after rolling twice
Between annealing temperature be 680 degree, heat preservation 0.5 hour;Material is finally rolled into the golden plate that thickness is 10-20mm;It is molded in jewellery
In the process, it needs to carry out intermediate annealing process, eliminates the stress in process;Wherein, homogenization temperature is 800 degree, the time
It is 1-2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694676.3A CN108660334A (en) | 2018-06-29 | 2018-06-29 | One kind having aging stability and corrosion resistant 22K gold billon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694676.3A CN108660334A (en) | 2018-06-29 | 2018-06-29 | One kind having aging stability and corrosion resistant 22K gold billon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108660334A true CN108660334A (en) | 2018-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810694676.3A Withdrawn CN108660334A (en) | 2018-06-29 | 2018-06-29 | One kind having aging stability and corrosion resistant 22K gold billon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108660334A (en) |
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2018
- 2018-06-29 CN CN201810694676.3A patent/CN108660334A/en not_active Withdrawn
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Application publication date: 20181016 |