CN107858547A - A kind of high-damping Ag Li Sn silver lithium alloys close to fine silver electrical conductivity - Google Patents
A kind of high-damping Ag Li Sn silver lithium alloys close to fine silver electrical conductivity Download PDFInfo
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- CN107858547A CN107858547A CN201711182091.5A CN201711182091A CN107858547A CN 107858547 A CN107858547 A CN 107858547A CN 201711182091 A CN201711182091 A CN 201711182091A CN 107858547 A CN107858547 A CN 107858547A
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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
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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Abstract
The invention discloses a kind of high-damping Ag Li Sn silver lithium alloys close to fine silver electrical conductivity.By weight percentage, alloy composition is：Li:0.5‑3.4wt.%,Sn:2.6‑3.8wt.%,Be:0.2‑0.5wt.%,Hf:0.1‑0.3wt.%,Sr:0.5‑0.8wt.%,Ge:0.2‑0.4wt.%,In:0.1‑0.3wt.%,Ta:0.1‑0.3wt.%,Gd:0.2 0.3wt.%, B:0.2 0.4wt.%, surplus are silver.Relative to conventional electrical contacts silver alloy, the material has excellent mechanical performance, high conductivity and outstanding damping capacity.
Description
Technical field
The present invention relates to technical field of alloy, specifically, is related to a kind of silver-colored lithium alloy.
Background technology
Electrical contact element is also known as contact or contact, and connection, disjunction, water conservancy diversion and isolation electric current are played in high and low pressure electrical equipment
Effect, be one of key element of high and low voltage electrical equipment.Electrical contact element is mainly made up of contact material, and contact material is
The key function material of electrical alloy, for high and low voltage switch contact, its performance directly influences power generating equipment and power transmission and transformation dress
Standby technical merit.Contact material must have good conduction, thermal conductivity and resistance to electrical arc erosion, anti-melting welding, small electric mill
Damage, low and stable contact resistance, not with playing chemical change using medium, having certain intensity and to be easy to machining etc. logical
Property.Silver has excellent electric conductivity and thermal conductivity, becomes current contact material and develops indispensable raw material.Silver-based electricity
Contact alloy is widely used in various low pressure and High-Voltage Electrical Appliances, is widely used in distribution system, household electrical appliances, traffic and control machinery equipment
In.
Silver alloy has the excellent performance of some row.(1) excellent physical and chemical properties.The conduction of silver alloy and heat conduction
Property is also fine.Silver alloy is very high to the resistance to corrosion of air and water.(2) good processing characteristics.Plasticity is fine, easily hot and cold
Shaping；Casting silver alloy has good casting character.(3) there are some special machine performances.Such as excellent antifriction quality and resistance to
Mill property, high elastic limit and fatigue limit.
Oneself the external electrical conductivity of the novel electrical contact silver alloy through exploitation can't be satisfactory, could not be more than 90%
IACS, it is impossible to meet the requirement of modern industry and component to silver-based electric contact material conductance and other performance.Exploitation possesses
Property silver alloy has two methods, and one kind is to add alloying element to strengthen matrix by solution strengthening, and another kind is logical
Cross addition second-phase strength and mutually form silver-based composite material.Lithium is added in silver alloy as alloy element can greatly improve silver
The elastic performance of alloy, electric conductivity and other performance.Develop novel silver-based electric contact alloy has turned into inevitable.
In melting and forming process oxidation easily occurs for silver-colored lithium alloy, burning is even exploded, the not only shaping to part
Damaged with performance, also easily injure human body and pollution environment.One important directions of silver-colored lithium alloy industrialization are exactly such as
What prevents the oxidizing fire under its high temperature.At present frequently with chlorate flux protection method and inert gas shielding in metallurgy industry
Method.But both approaches have the defects of it is difficult to avoid that, such as it is also easy to produce toxic gas pollution environment and causes flux to be mingled with
And damage alloy property.In addition, melting, casting equipment and complex process, increase cost.Solve silver-colored lithium alloy to melt in an atmosphere
Another approach that burning is produced during refining is to add alloying element into silver-colored lithium alloy, reaches fire-retardant mesh by the method for alloying
's.Its mechanism of alloying ignition-proof method is that specific alloying element is added in silver-colored lithium alloy fusion process to influence the heating power of alloy
Learn and dynamic process, formation have the dense oxidation film and nitride film of protective effect, reach and prevent alloy vigorous oxidation and nitrogen
The purpose of change, and the tendency of oxidizing fire of the silver-colored lithium alloy during following process substantially reduces, and is closed so as to improve silver-colored lithium
The process safety of gold.
But as a kind of contact material silver alloy, it is to meet only to have gratifying electric conductivity
It is required that, it is often more important that final silver-colored lithium alloy product will also possess gratifying mechanical strength and other performance simultaneously.Cause
And the content of various alloying elements how is balanced in silver-colored lithium alloy, prepare fire-retardant under atmospheric environment, prevent lithium in melting
During the silver-colored lithium alloy that volatilizees, and possess excellent conductive and mechanical properties, be that one of current silver-colored lithium alloy is urgently to be resolved hurrily
The problem of.
The content of the invention
Present invention aims to overcome that the deficiencies in the prior art, there is provided one kind can be under 1050-1150 degree atmospheric conditions
Carry out the high-damping Ag-Li-Sn silver lithium alloy and its processing technology close to fine silver electrical conductivity of melting.And melted in this temperature range
The alloy final products of refining have the high conductivity possessed required for silver-based electric contact material, high intensity and excellent damping system
Number.This method also has production cost low, the characteristics of being easy to mass produce.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of high-damping Ag-Li-Sn silver lithium alloys having between 1050-1150 degree during melting close to fine silver electrical conductivity.Press
Percentage by weight meter, the composition of alloy are：Li: 0.5-3.4wt.%,Sn:2.6-3.8wt.%,Be:0.2-0.5wt.%,Hf:
0.1-0.3wt.%,Sr:0.5-0.8wt.%,Ge:0.2-0.4wt.%,In:0.1-0.3wt.%,Ta:0.1-0.3wt.%,Gd:
0.2-0.3wt.%, B:0.2-0.4wt.%, surplus are silver.The silver-colored lithium alloy is in fusion process because volatilization and formation clinker etc.
Reason and the weight lost are in 2.0-5.0wt.% or so.
The preparation method of above-mentioned silver-colored lithium alloy, comprises the following steps：As above the raw material matched is added under atmosphere protection
Electric induction furnace in, and use silicon carbide crucible.Sensing heating forms alloy solution to 1050-1150 degree, and is stirred using electromagnetism
Effect is mixed to be sufficiently stirred 10 minutes or so.Alloy liquid is incubated 10 minutes in 1050-1150 degree and is poured onto heat top same level equipment
Interior carry out semi-continuous casting, it is 8-10m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, every time
It is 5-10% to roll lower amount.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：230 degree,
3.6 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 610 degree, 2.3 hours；Vacuum aging processing 160
Degree, 2.0 hours
Compared with prior art, the present invention has the advantages that：
（1）The present situation that patent of the present invention is directed to silver-colored lithium alloy under current high temperature and needs protect melting in melting provides
A kind of novel atmosphere protection solution.By the main and secondary addition element in preferred alloy, so as to effectively prevent
Burning occurs for silver-colored lithium alloy under melting state and excessive Evaporation Phenomenon is entered., not only can be big by preferable alloying method
Big the shortcomings that reducing alloying element usage amount, extraordinary flame retardant effect can also be obtained and improve lithium recovery rate, final products
The content of middle lithium accounts for 80-90wt.% of initial lithium addition or so.
（2）The Ag-Li-Sn silver lithium alloy that this patent proposes has extremely excellent fire resistance, Ke Yida in the quiescent state
Burnt to 5 hours are stood under atmospheric environment in 1050-1150 temperature ranges without obvious.In dynamic process,
Such as liquid alloy is stirred, blown etc. during melt treatment, after its skin covering of the surface is because being stirred vigorously destroyed, remain to
Rapid regeneration, successfully hinder the burning of alloy.Gained alloy surface oxide-film and nitride film have extraordinary plasticity and viscosity,
Alloy surface intactly can be sprawled and covered, is effectively stopped in air intrusion aluminium alloy.And the silver-colored lithium alloy is in melting
The weight that Cheng Yinwei volatilizees and forms the reasons such as clinker and lose is less than 5.0wt.% or so.
（3）The Ag-Li-Sn silver lithium alloy is after lithium is added, so that crystal grain is refined.In addition, the alloy have it is low
Liquid-solid phase solidification temperature range, can solve that hot cracking tendency is big during casting, the empty and loose substantially product yield rate of casting is low
Deng technical barrier.Smelting processing method is simple, and production cost is reduced to equipment requirement than relatively low.So that alloy service life
It is further improved, is easy to industrialize large-scale application.
（4）The material has the mechanical property higher than traditional silver-base alloy：Tensile strength is 850-920MPa；Traditional material
Material tensile strength is less than 700MPa.And conductance (%IACS) can maintain 105-106 (traditional material is less than 90).The material
With high damping capacity, damped coefficient SDC=28-34% (traditional material is less than 15%).In addition, the material closes than traditional silver-based
The density of gold reduces 5-8% or so.
Embodiment
Embodiment 1
A kind of high-damping Ag-Li-Sn silver lithium alloys that there are 1080 degree of meltings close to fine silver electrical conductivity.By weight percentage,
The chemical composition of alloy is：Li: 2.6wt.%,Sn:2.9wt.%,Be:0.3wt.%,Hf:0.2wt.%,Sr:0.6wt.%,Ge:
0.3wt.%,In:0.2wt.%,Ta:0.2wt.%,Gd:0.2wt.%, B:0.3wt.%, surplus are silver.The preparation method of alloy：Will
As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.Sensing heating to 1080 degree,
Alloy solution is formed, and is sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is poured for 10 minutes in 1080 degree of insulations
Cast onto in the same level equipment of heat top and carry out semi-continuous casting, it is 8m/min that ingot casting, which moves down speed,.Ingot casting is become at room temperature
Shape is handled, and amount is 9% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, work
Skill is：230 degree, 3.6 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 610 degree, 2.3 hours；Vacuum
160 degree, 2.0 hours of Ageing Treatment.The material has the mechanical property higher than traditional silver-base alloy：Tensile strength is 905MPa；
Traditional material tensile strength is less than 700MPa.And conductance (%IACS) can maintain for 105 (traditional material is less than 90).The material
Material has high damping capacity, damped coefficient SDC=29% (traditional material is less than 15%).In addition, the material is than traditional silver-base alloy
Density reduce by 5.4% or so.The alloy in 1080 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt
Processing is without occurring obvious burning phenomenon, and material raw material proportion of goods damageds energy caused by evaporating and being formed due to clinker
Control is in 2.7wt.% or so.
Embodiment 2
A kind of high-damping Ag-Li-Sn silver lithium alloys that there are 1100 degree of meltings close to fine silver electrical conductivity.By weight percentage,
The chemical composition of alloy is：Li: 2.5wt.%,Sn:2.9wt.%,Be:0.4wt.%,Hf:0.2wt.%,Sr:0.6wt.%,Ge:
0.3wt.%,In:0.2wt.%,Ta:0.2wt.%,Gd:0.2wt.%, B:0.2wt.%, surplus are silver.The preparation method of alloy：Will
As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.Sensing heating to 1100 degree,
Alloy solution is formed, and is sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is poured for 10 minutes in 1100 degree of insulations
Cast onto in the same level equipment of heat top and carry out semi-continuous casting, it is 10m/min that ingot casting, which moves down speed,.Ingot casting is become at room temperature
Shape is handled, and amount is 6% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, work
Skill is：230 degree, 3.6 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 610 degree, 2.3 hours；Vacuum
160 degree, 2.0 hours of Ageing Treatment.The material has the mechanical property higher than traditional silver-base alloy：Tensile strength is 874MPa；
Traditional material tensile strength is less than 700MPa.And conductance (%IACS) can maintain for 105 (traditional material is less than 90).The material
Material has high damping capacity, damped coefficient SDC=29% (traditional material is less than 15%).In addition, the material is than traditional silver-base alloy
Density reduce by 5.4% or so.The alloy in 1100 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt
Processing is without occurring obvious burning phenomenon, and material raw material proportion of goods damageds energy caused by evaporating and being formed due to clinker
Control is in 3.2wt.% or so.
Embodiment 3
A kind of high-damping Ag-Li-Sn silver lithium alloys that there are 1120 degree of meltings close to fine silver electrical conductivity.By weight percentage,
The chemical composition of alloy is：Li: 2.4wt.%,Sn:2.9wt.%,Be:0.4wt.%,Hf:0.2wt.%,Sr:0.6wt.%,Ge:
0.3wt.%,In:0.2wt.%,Ta:0.1wt.%,Gd:0.2wt.%, B:0.3wt.%, surplus are silver.The preparation method of alloy：Will
As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.Sensing heating to 1120 degree,
Alloy solution is formed, and is sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is poured for 10 minutes in 1120 degree of insulations
Cast onto in the same level equipment of heat top and carry out semi-continuous casting, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is become at room temperature
Shape is handled, and amount is 10% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, work
Skill is：230 degree, 3.6 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 610 degree, 2.3 hours；Vacuum
160 degree, 2.0 hours of Ageing Treatment.The material has the mechanical property higher than traditional silver-base alloy：Tensile strength is 896MPa；
Traditional material tensile strength is less than 700MPa.And conductance (%IACS) can maintain for 106 (traditional material is less than 90).The material
Material has high damping capacity, damped coefficient SDC=31% (traditional material is less than 15%).In addition, the material is than traditional silver-base alloy
Density reduce by 6.5% or so.The alloy in 1120 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt
Processing is without occurring obvious burning phenomenon, and material causes the raw material proportion of goods damageds to control due to evaporating and form clinker
System is in 3.6wt.% or so.
Claims (3)
1. a kind of high-damping Ag-Li-Sn silver lithium alloys close to fine silver electrical conductivity, it is characterised in that by weight percentage, close
Gold chemical composition be：Li: 0.5-3.4wt.%,Sn:2.6-3.8wt.%,Be:0.2-0.5wt.%,Hf:0.1-0.3wt.%,
Sr:0.5-0.8wt.%,Ge:0.2-0.4wt.%,In:0.1-0.3wt.%,Ta:0.1-0.3wt.%,Gd:0.2-0.3wt.%,
B:0.2-0.4wt.%, surplus are silver.
2. according to claim 1 close to the high-damping Ag-Li-Sn silver lithium alloys of fine silver electrical conductivity, it is characterised in that alloy
Preparation method comprise the following steps：As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses carbon
SiClx crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect to 1050-1150 degree；
Alloy liquid is poured onto in the same level equipment of heat top for 10 minutes in the insulation of 1050-1150 degree and carries out semi-continuous casting, ingot casting moves down
Speed is 8-10m/min.
3. according to claim 1 close to the high-damping Ag-Li-Sn silver lithium alloys of fine silver electrical conductivity, it is characterised in that include
Following procedure of processing：Ingot casting is subjected to deformation process at room temperature, amount is 5-10% under every time rolling；Every 3 passes need
An intermediate heat-treatment is carried out to eliminate processing hardening, technique is：230 degree, 3.6 hours；Final heat treatment work after rolling
Skill is：Vacuum solid solution handles 610 degree, 2.3 hours；Vacuum aging handles 160 degree, 2.0 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711182091.5A CN107858547A (en) | 2017-11-23 | 2017-11-23 | A kind of high-damping Ag Li Sn silver lithium alloys close to fine silver electrical conductivity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711182091.5A CN107858547A (en) | 2017-11-23 | 2017-11-23 | A kind of high-damping Ag Li Sn silver lithium alloys close to fine silver electrical conductivity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055438A (en) * | 2019-05-20 | 2019-07-26 | 杭州辰卓科技有限公司 | A kind of novel jewellery silver alloy with surface fence diffraction effect |
-
2017
- 2017-11-23 CN CN201711182091.5A patent/CN107858547A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055438A (en) * | 2019-05-20 | 2019-07-26 | 杭州辰卓科技有限公司 | A kind of novel jewellery silver alloy with surface fence diffraction effect |
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Application publication date: 20180330 |