CN108796271A - A kind of 22K gold billons with excellent resilience performance - Google Patents

Abstract

The invention discloses a kind of 22K gold billons with excellent resilience performance.According to weight percent, the ingredient of the alloy is:Sr:0.5-0.6wt.%,Nb:1.2-1.5wt.%,Ir:0.3-0.5wt.%,Yb:0.1-0.3wt.%,Na:0.3-0.5wt.%,B:0.1-0.3wt.%,Ag:2.0-4.0wt.%,Au:90.0-92.0wt.%, surplus are platinum.The patent solves current 22K gold materials elasticity deficiency, and present situation backward in technique.By advanced design of material while greatly improving 22K gold elastic properties, also solves such alloy the phenomenon that low temperature uses rear brittle failure.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 22K gold billons with excellent resilience performance

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..Gold can be also used for daily necessities, such as gold-plated clock and watch, belt fastener, lighter, pen.Clock and watch kingdom is auspicious Scholar country is little, but its ornaments industry is measured with gold up to 40 tons or so, wherein 95% is used in watchmaking every year.A Japanese only hand 1 year consumption gold salt of Watch Factory is equivalent to 680 kilograms of gold of consumption just up to 1 ton.The purposes of gold is more and more wider, and consumption is also more next It is bigger, thus cause especially deeply concerned and keen interest of the countries in the world to gold.

Soft gold is easily deformed, and is also easy to wear.Therefore, people begin to attempt to be added in proof gold a small amount of Other alloying elements increase the hardness of gold, wherein silver, copper, zinc etc., which are all existing frequently-used are added in gold, increases intensity With the metal of toughness.Add the gold of alloying element, that is, billon.Determine the position processed of gold content in billon in English It is Karat, it also can abbreviation K by head word.Therefore, ornamental billon is also known as karat gold.

The content for wanting to calculate gold in each karat gold, can use the number divided by 24 before K, what is obtained is exactly gold Content in this synthesis metal.For 18K gold, 18 ÷ 24=0.75, that is, gold content in 18K gold are 75%. There are many color of present karat gold, and gold with other metals when carrying out alloying, as long as the alloying of variety classes and content is added Element just forms the K gold of different colours.

The gold and jewelry consumption in China is developed so far from early 1980s, from the early stage of development to buy proof gold decorations Based on product, focus on value preserving effect, but style, style changes little, kind are dull.The karat gold jewellery till now that develop start a large amount of faces City, and growth momentum is swift and violent.Apparent can see, and the consumption idea of people pursues personalization by focusing on being worth turning to, Style, the technique for being particular about jewellery are particular about jewellery and itself individual character, the matching of dress.Karat gold jewellery are since style is modish, color is rich It is rich, price is low, diversification, personalization style meet consumer demand, and therefore it is also continued to develop.Even have People says that the non-karat gold jewellery in the world of 21 century gold ornaments industry do not belong to.

Why karat gold jewellery receive an acclaim, and are because they are modish better than proof gold jewellery style in many aspects.Karat gold because Other metals are added into billon, the wearability become reconciled with higher hardness, corrosion resistance are unlikely to deform and good The characteristics such as castability.Since the raising of golden hardness promotes the fast development of jewellery industry, originally backward processing work is also changed Skill can reach and natural high-grade true and false difficult point of the journey of product with mass production, along with the material inlayed is synthesized using high-tech Degree.Therefore, the combination of alloy and different inlaid materials keeps the style of karat gold jewellery more rich and varied, up to tens of thousands of kinds, Ten tens of thousands of kinds, its novelty, aesthetic feeling completely can be with times.

But it must be observed that although China's bullion industry, especially jewelry gold alloy, quickly grow, but due to rising In step evening, starting point is low, and also there is a big difference compared with world level on some sport technique segments.Do not have much also in karat gold field The industry problems of solution, for example, karat gold brittle failure, the rub resistance of karat gold and corrosion-resistant, use discoloration of karat gold etc., the length of these problems Time does not solve, and not only affects the market sales volume and usage experience of Related product, and also serious such product that limits exists The market occupancy volume of international scope.For 22K gold alloys, which has excellent tarnish resistance and resistance to corrosion Aspect, this is particularly significant to jewellery.Thus these materials can make jewelry keep high brightness for a long time.But it must see It arrives, 22K gold material is preparing some jewelry structural members at present, such as when ear acupuncture, tack, brooch, spring, needs good Good elasticity, it is similarly desirable to increase the hardness of alloy.But the hardness and strength of 22K gold alloy itself are not low, can meet Surface rub resistance and anti abrasive requirement.But as some elongate articles and the jewelry parts deformed are often subject to, as described above Various aciculiform objects or spring, must just make 22K gold billons that there is extremely excellent elastic property, i.e. springform Amount.Regrettably, the method prepared by current this elongated member be exactly using traditional silver alloy and plate or Last layer 22K gold alloys are coated temporarily to solve the problems, such as this.

The low elasticity of 22K gold billons has been the inevitable problem of field of jewelry, it is domestic for a long time very More research institutions and enterprise have carried out multi-faceted trial.And a series of representative 22K gold are carried out with alloy Correlation between careful exploration, including alloying component-institutional framework-performance change therein and action rule.But Regrettably, the progress of any substance is not yet obtained so far.It can be passed through by advanced design of material technology The thermodynamics and kinetics means of bottom innovate alloy material, and to the insufficient difficulty of the elastic property of 22K gold The key to exercises is certainly and industrialization has prodigious market value.In face of the domestic and international market competition being growing more intense, it is necessary to accelerate structure Paces are adjusted, 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 22K gold use with excellent resilience performance Billon.

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

A kind of 22K gold billons with excellent resilience performance.By weight percentage, the group of alloy becomes:Sr:0.5- 0.6wt.%,Nb:1.2-1.5wt.%,Ir:0.3-0.5wt.%,Yb:0.1-0.3wt.%,Na:0.3-0.5wt.%,B:0.1- 0.3wt.%,Ag:2.0-4.0wt.%,Au:90.0-92.0wt.%, surplus are platinum.

A kind of preparation method of above-mentioned 22K gold billons with excellent resilience performance, includes the following steps：It will be as The raw material of upper proportioning is added in the electric induction furnace of argon gas protection, and uses graphite crucible;Using low discharge after metal molten Argon gas is protected, and big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1150 degree when melting, leans on Efco-Northrup furnace Electromagnetic agitation is 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）When some the jewelry structural members prepared using 22K billons, such as when ear acupuncture, tack, brooch, spring, need Good elasticity.The hardness and strength of current tradition 22K gold alloys itself can meet surface rub resistance and anti abrasive It is required that but when for preparing as described above various aciculiform objects or spring, existing elastic property cannot be met the requirements. Regrettably, the solution of these current elongated members is exactly using traditional silver alloy and on plating or coating One layer of 22K gold alloy temporarily solves the problems, such as this.The 22K gold billon of present patent application protection is meeting to tension Under the requirement of intensity and case hardness, also there is extremely excellent elastic property.The yield strength of the material is 90-100MPa, Tensile strength is 220-240MPa, elongation percentage 40-50%, elasticity modulus 70-80GPa.In comparison, traditional 22K gold It is 70-80MPa, tensile strength 190-200MPa, elongation percentage 20-30% with the yield strength of billon, elasticity modulus is 50-60GPa.It can be seen that the material can obtain bigger while the tensile strength of inheriting tradition 22K gold billons Elasticity modulus and elongation percentage.These excellent performances allow the alloy to be widely used in the life of aciculiform object and spring object Production, completely solves current jewellery industry for the insufficient present situation of 22K gold alloy material performances.

（2）The alloyage process of present patent application, alloy element selection can make final alloy structure obtain Refinement.Since alloying element and matrix gold element form dystectic compound, the thinning microstructure as heterogeneous nucleus.This Outside, alloying element is enriched in solid-liquid interface forward position when solidification, increases the constitutional supercooling of alloy, and hinder dendritic growth, As-cast structure is refined.Meanwhile the optimization and combination of alloying element influence less the solidus of billon and liquidus temperature. In solidification, alloying element is enriched in solid-liquid interface forward position, and the temperature that dendrite is linked to be skeleton can be made to postpone, made under quasi- solidus Drop, increases the liquidus temperature section of alloy, improves the casting character of alloy.Most of all, alloying element is to billon Color influences are little, and alloy shows the distinctive yellow of proof gold after preparation and processing, have beautiful color saturation.

（3）Traditional 22K gold needs to carry out medium temperature hot forging processing before rolling after Homogenization Treatments.But due to casting Ingot internal soundness is poor, and remaining has oxide to be mingled with, and when forging will generate micro-crack at oxide inclusion.It is micro- in forging process Crackle further expands, and causes lumber recovery low.Hot cracking tendency is big when the billon of present patent application protection can solve to cast, casting Make empty equal technical barriers low with loose apparent product yield rate.Smelting processing method is simple, and production cost is relatively low, reduces To equipment requirement.The aerial corrosion resistance of the alloy belongs to compared with stabilizing material, belongs to stable proximate matter in weak acid, weak base sweat Material.In corrosive environment, can be formed passivation protective film, this film in different media, due to unpolarizing as a result, To show different corrosion resistances, the corrosion resistance of strong acid, strong basicity sweat is also relatively stablized.It is contemplated that the material The implementation and industrialization of material will obtain excellent economic benefit and social benefit.

Specific implementation mode

Embodiment 1

A kind of 22K gold billons with excellent resilience performance.By weight percentage, the group of alloy becomes:Sr: 0.5wt.%,Nb:1.2wt.%,Ir:0.3wt.%,Yb:0.1wt.%,Na:0.3wt.%,B:0.1wt.%,Ag:2.0wt.%,Au: 90.0wt.%, surplus are platinum.A kind of preparation method of above-mentioned 22K gold billons with excellent resilience performance, including such as Lower step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is adopted after metal molten It is protected with the argon gas of low discharge, big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1150 degree when melting, is leaned on Efco-Northrup furnace electromagnetic agitation is uniform;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting is using straight 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, every time is rolled Lower amount is 30-40%;It is 680 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Material is finally rolled into thickness For the golden plate of 10-20mm;In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Its In, homogenization temperature is 800 degree, and the time is 1-2 hours.

The alloy also has extremely excellent elastic property in the case where meeting the requirement to tensile strength and case hardness.It should The yield strength of material is 90-100MPa, tensile strength 220-240MPa, elongation percentage 40-50%, elasticity modulus 70- 80GPa.In comparison, the yield strength of traditional 22K gold billon is 70-80MPa, tensile strength 190- 200MPa, elongation percentage 20-30%, elasticity modulus 50-60GPa.It can be seen that the material is in inheriting tradition 22K gold billons Tensile strength while, the elasticity modulus and elongation percentage of bigger can be obtained.These excellent performances so that the alloy can be with It is widely used in the production of aciculiform object and spring object, completely solves current jewellery industry for 22K gold billons The insufficient present situation of material property.The aerial corrosion resistance of the alloy belongs to compared with stabilizing material, belongs in weak acid, weak base sweat Stable type material.In corrosive environment, can be formed passivation protective film to show different corrosion resistances, to strong acid, The corrosion resistance of strong basicity sweat is also relatively stablized.

Embodiment 2

A kind of 22K gold billons with excellent resilience performance.By weight percentage, the group of alloy becomes:Sr: 0.6wt.%,Nb:1.5wt.%,Ir:0.5wt.%,Yb:0.3wt.%,Na:0.5wt.%,B:0.3wt.%,Ag:4.0wt.%,Au: 92.0wt.%, surplus are platinum.A kind of preparation method of above-mentioned 22K gold billons with excellent resilience performance, including such as Lower step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is adopted after metal molten It is protected with the argon gas of low discharge, big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1150 degree when melting, is leaned on Efco-Northrup furnace electromagnetic agitation is uniform;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting is using straight 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, every time is rolled Lower amount is 30-40%;It is 680 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Material is finally rolled into thickness For the golden plate of 10-20mm;In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Its In, homogenization temperature is 800 degree, and the time is 1-2 hours.

The alloy also has extremely excellent elastic property in the case where meeting the requirement to tensile strength and case hardness.It should The yield strength of material is 90-100MPa, tensile strength 220-240MPa, elongation percentage 40-50%, elasticity modulus 70- 80GPa.In comparison, the yield strength of traditional 22K gold billon is 70-80MPa, tensile strength 190- 200MPa, elongation percentage 20-30%, elasticity modulus 50-60GPa.It can be seen that the material is in inheriting tradition 22K gold billons Tensile strength while, the elasticity modulus and elongation percentage of bigger can be obtained.These excellent performances so that the alloy can be with It is widely used in the production of aciculiform object and spring object, completely solves current jewellery industry for 22K gold billons The insufficient present situation of material property.The aerial corrosion resistance of the alloy belongs to compared with stabilizing material, belongs in weak acid, weak base sweat Stable type material.In corrosive environment, can be formed passivation protective film to show different corrosion resistances, to strong acid, The corrosion resistance of strong basicity sweat is also relatively stablized.

Embodiment 3

A kind of 22K gold billons with excellent resilience performance.By weight percentage, the group of alloy becomes:Sr: 0.5wt.%,Nb:1.4wt.%,Ir:0.4wt.%,Yb:0.2wt.%,Na:0.4wt.%,B:0.2wt.%,Ag:3.0wt.%,Au: 91.0wt.%, surplus are platinum.A kind of preparation method of above-mentioned 22K gold billons with excellent resilience performance, including such as Lower step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is adopted after metal molten It is protected with the argon gas of low discharge, big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1150 degree when melting, is leaned on Efco-Northrup furnace electromagnetic agitation is uniform;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting is using straight 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, every time is rolled Lower amount is 30-40%;It is 680 degree per intermediate anneal temperature after rolling twice, keeps the temperature 0.5 hour;Material is finally rolled into thickness For the golden plate of 10-20mm;In jewellery forming process, needs to carry out intermediate annealing process, eliminate the stress in process;Its In, homogenization temperature is 800 degree, and the time is 1-2 hours.

The alloy also has extremely excellent elastic property in the case where meeting the requirement to tensile strength and case hardness.It should The yield strength of material is 90-100MPa, tensile strength 220-240MPa, elongation percentage 40-50%, elasticity modulus 70- 80GPa.In comparison, the yield strength of traditional 22K gold billon is 70-80MPa, tensile strength 190- 200MPa, elongation percentage 20-30%, elasticity modulus 50-60GPa.It can be seen that the material is in inheriting tradition 22K gold billons Tensile strength while, the elasticity modulus and elongation percentage of bigger can be obtained.These excellent performances so that the alloy can be with It is widely used in the production of aciculiform object and spring object, completely solves current jewellery industry for 22K gold billons The insufficient present situation of material property.The aerial corrosion resistance of the alloy belongs to compared with stabilizing material, belongs in weak acid, weak base sweat Stable type material.In corrosive environment, can be formed passivation protective film to show different corrosion resistances, to strong acid, The corrosion resistance of strong basicity sweat is also relatively stablized.

Claims (3)

1. a kind of 22K gold billons with excellent resilience performance；According to weight percent, the ingredient of the alloy is:Sr: 0.5-0.6wt.%,Nb:1.2-1.5wt.%,Ir:0.3-0.5wt.%,Yb:0.1-0.3wt.%,Na:0.3-0.5wt.%,B: 0.1-0.3wt.%,Ag:2.0-4.0wt.%,Au:90.0-92.0wt.%, surplus are platinum.

2. a kind of 22K gold billons with excellent resilience performance described in claim 1, it is characterised in that including following smelting Refine step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses graphite crucible;It is adopted after metal molten It is protected with the argon gas of low discharge, big air-flow is avoided to make the serious scaling loss of alloying element;10 minutes are kept the temperature at 1150 degree when melting, is leaned on Efco-Northrup furnace electromagnetic agitation is uniform;1 minute being kept the temperature at 1250 degree after stirring evenly and being cast come out of the stove;Billon casting is using straight The punching block of diameter 100-200mm, and cooled down by the way of water cooling.

3. according to a kind of 22K gold billons with excellent resilience performance described in claim 1, it is characterised in that comprising as follows Use step：The ingot casting of gained is rolled at room temperature, it is 30-40% that every time, which rolls lower amount,;It is moved back per intermediate after rolling twice Fiery temperature is 680 degree, keeps the temperature 0.5 hour;Material is finally rolled into the golden plate that thickness is 10-20mm;In jewellery forming process In, it needs to carry out intermediate annealing process, eliminates the stress in process;Wherein, homogenization temperature is 800 degree, time 1-2 Hour.