CN107586985A - A kind of high-strength high-conductivity oxidation-resisting Ag Li In silver lithium alloys - Google Patents
A kind of high-strength high-conductivity oxidation-resisting Ag Li In silver lithium alloys Download PDFInfo
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- CN107586985A CN107586985A CN201711123897.7A CN201711123897A CN107586985A CN 107586985 A CN107586985 A CN 107586985A CN 201711123897 A CN201711123897 A CN 201711123897A CN 107586985 A CN107586985 A CN 107586985A
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Abstract
The invention discloses a kind of high-strength high-conductivity oxidation-resisting Ag Li In silver lithium alloys and its processing technology.By weight percentage, alloy composition is：Li:0.5‑2.0wt.%,In:1.0‑1.5wt.%,Mg:0.5‑0.9wt.%,Bi:0.3‑1.5wt.%,Se:0.2‑0.4wt.%,Pd:0.1‑0.3wt.%,Mo:0.2‑0.3wt.%,Ho:0.1‑0.2wt.%,S:0.2 0.4wt.%, B:0.5 1.0wt.%, surplus are silver.The material is in addition to excellent mechanical performance and high conductivity, also with high high-temperature behavior.Yield strength is 450 520MPa at 500 600 degree or so, and the surrender of conventional silver contact alloy is less than by force 350MPa.
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
Silver has good electric conductivity and thermal conductivity, and other alloying elements are added in silver can improve the performance of silver.Silver closes
Golden species is a lot, most important of which is that：Yellow gold, silver-colored magnesium alloy, silver-nickel, silver tungsten, silver-colored ferroalloy and silver-colored cerium
Alloy.Product dosage made of silver alloy is maximum, applied widely.These silver alloy have a series of characteristic：(1) it is excellent
Physics, chemical property.Conduction, the thermal conductivity of silver alloy are fine.(2) good processing characteristics.Plasticity is fine, easily it is hot and cold into
Shape.Casting silver alloy has good casting character.(3) there are some special machine performances.Such as excellent antifriction quality and wear-resisting
Property, high elastic limit and fatigue limit.
Contact material be prepare switching control and load current electrical equipment in electric power, appliance circuit (as switch, relay,
Starter and instrument and meter etc.) heart element electrical contact critical material, the quality of its quality is related to circuit arrangement, instrument
Reliability, stability, measure of precision and its life-span.Silver alloy contact material is applied to work under various power conditions, and
And it is largely used in big or middle load electrical equipment, such as various switches, relay, contactor.The condition of work of power contact big or middle
Relatively severe, often under the strong effect in electric arc, electroerosion is serious, and special requirement thermal conductivity, electric conductivity will get well, anti-electroerosion energy
Power is eager to excel.But silver alloy easy melting welding under high current effect, easily aoxidizes and has vulcanization to be inclined to.
Exploitation high-strength high-conductivity oxidation-resisting silver alloy has two methods, and one kind is to add alloying element by solution strengthening come strong
Change matrix, another kind is mutually to form silver-based composite material by adding second-phase strength.Oneself external new resistance to oxidation through exploitation
The intensity and conductance of silver alloy are too low, and yield strength is less than 400MPa, and conductance could not exceed 80%IACS, it is impossible to meets
Requirement of the modern component to conductance.Lithium adds in silver alloy the elasticity that can greatly improve silver alloy as alloy element
Performance and resistance to softening at high temperature energy.Exploitation novel high-strength, height are led, the silver-colored lithium alloy of high abrasion, high softening temperature has turned into inevitable.
The characteristics of silver-colored lithium alloy maximum is easily to aoxidize burning because of silver-colored lithium alloy melt in smelting process, is generated loose
Oxide-film and nitride film.This unsound bath surface compound film can not prevent the expansion of oxygen and nitrogen to bath surface
Dissipate, result in continuous oxidation and consumption of the silver-colored lithium alloy melt in fusion process.Therefore, at present in the smelting of silver-colored lithium alloy
Alloy preparation is typically carried out using the method for argon gas protection.And smelting temperature is at 1100 degree or so.In so high temperature
Under, lithium causes to volatilize excessively in smelting process because vapour pressure is excessive, and remaining lithium content is too low in final alloy.It is general and
Speech, using the silver-colored lithium alloy of the method melting of argon gas protection, the recovery rate of final lithium only has 10-30wt.% or so.And the party
There is casting to some extent to be also easy to produce the shortcomings of flux is mingled with, equipment is complicated and production cost is high for method.Therefore close silver-colored lithium
Development, the exploitation of gold are restricted with application.The thus industry in urgent need large-scale use silver lithium alloy and national defence, one
Directly there is existing yield is few, technique is cumbersome, the present situation that the urgent need such as cost height overcomes.
Seek more preferable smelting process as one of key issue in silver-colored lithium alloy application study and industrialization.Pass through conjunction
The method of aurification reaches the oxidation for preventing the silver-colored lithium alloy melt in smelting process, is to solve the development that silver-colored lithium alloy smelts problem
One of direction.Alloying ignition-proof and prevent that mechanism that lithium volatilizees in fusion process from being to add alloying element in the alloy to influence
The thermodynamics and dynamics process of alloy oxidation, dense oxidation film and nitride film with protective effect are formed in alloy surface,
Reach the purpose for preventing alloy vigorous oxidation.Compared with argon gas is protected, alloying ignition-proof can eliminate flux and be mingled with, and improve alloy
Mechanical property and corrosion resistance, reduce the pollution to air.But as a kind of structural material, when only there is melting
It is fire-retardant and prevent lithium volatile performance in fusion process from far can not meet requirement, it is often more important that final silver-colored lithium alloy production
Product will also possess gratifying mechanical property and electric conductivity simultaneously, can at least reach the mechanical property water of conventional silver alloy
It is flat.The content of various alloying elements thus how is balanced in silver-colored lithium alloy, prepares fire-retardant under atmospheric environment and prevents lithium
The silver-colored lithium alloy to be volatilized in fusion process, and possess excellent mechanical property, it is 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-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloy and its processing technology of melting.And in the alloy of this temperature range melting
Final products have the mechanical property of existing silver-colored lithium alloy, and good temperature-room type plasticity and antioxygenic property.This method also has
Production cost is low, the characteristics of being easy to mass produce.
To achieve these goals, the present invention adopts the following technical scheme that：
One kind has the melting high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloys between 1050-1150 degree.By weight percentage
Meter, the composition of alloy are：Li: 0.5-2.0wt.%,In:1.0-1.5wt.%,Mg:0.5-0.9wt.%,Bi:0.3-1.5wt.%,
Se:0.2-0.4wt.%,Pd:0.1-0.3wt.%,Mo:0.2-0.3wt.%,Ho:0.1-0.2wt.%,S:0.2-0.4wt.%, B:
0.5-1.0wt.%, surplus are silver.The silver-colored lithium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing
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 8-15m/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：260 degree,
2.9 hours.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 670 degree, 3.2 hours；Vacuum aging processing 190
Degree, 2.4 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 solution.By the main and secondary addition element in preferred alloy, so as to effectively prevent in melting shape
Burning occurs for silver-colored lithium alloy under state and excessive Evaporation Phenomenon is entered.By preferable alloying method, conjunction can be not only substantially reduced
The shortcomings that gold element usage amount, extraordinary flame retardant effect can also be obtained and improve lithium recovery rate, lithium contains in final products
Amount accounts for 80-90wt.% of initial lithium addition or so.
（2）During alloy melting, melt has static (insulation of melt and standing) and dynamic（The stirring of melt）Two kinds of shapes
Formula.The Ag-Li-In silver lithium alloy that this patent proposes has extremely excellent fire resistance in the quiescent state, can reach in 1050-
5 hours are stood without obvious burning under atmospheric environment in 1150 temperature ranges.In dynamic process, such as to liquid
Alloy is stirred, blown etc. during melt treatment, after its skin covering of the surface is because being stirred vigorously destroyed, remains to rapid regeneration,
Success hinders the burning of alloy.Gained alloy surface oxide-film and nitride film have extraordinary plasticity and viscosity, can be complete
Alloy surface is sprawled and covered on ground, is effectively stopped in air intrusion aluminium alloy.And the silver-colored lithium alloy in fusion process because wave
Hair and the weight for forming the reasons such as clinker and losing are less than 5.0wt.% or so.
（3）The Ag-Li-In silver lithium alloy is after lithium is added, because lithium has excellent deoxidation getter action, so that
Crystal grain is refined.In addition, the alloy has low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast,
Cast the technical barriers such as empty and loose obvious product yield rate is low.Smelting processing method is simple, and production cost is than relatively low, reduction
To equipment requirement.While ensureing to possess anti-flammability, also make it that mechanical property has under alloy service life and high temperature
One step improves, and is easy to industrialize large-scale application.
（4）The material has mechanical property and electric conductivity under excellent normal temperature：Yield strength is 400-520MPa, is resisted
Tensile strength is 580-640MPa, and elongation percentage 4-8%, electric conductivity is (%IACS）：90-94（Conventional silver contact alloy is less than
80）.In addition, also there is high high-temperature behavior.Yield strength is 450-520MPa in 500-600 degree or so, and conventional silver connects
The surrender for touching alloy is less than by force 350MPa.
Embodiment
Embodiment 1
One kind has 720 degree of melting high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloys.By weight percentage, chemical composition
For：Li:1.8wt.%,In:1.2wt.%,Mg:0.4wt.%,Bi:0.8wt.%,Se:0.3wt.%,Pd:0.2wt.%,Mo:
0.2wt.%,Ho:0.1wt.%,S:0.2wt.%, B:0.6wt.%, surplus are silver.The preparation method of alloy：By what is as above matched
Raw material is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.It is molten to form alloy to 720 degree for sensing heating
Liquid, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is cast to heat for 10 minutes in 720 degree of insulations and pushes up same water
Semi-continuous casting is carried out in flat equipment, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, every time
Rolling under amount be 12%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：260 degree,
2.9 hours.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 670 degree, 3.2 hours；Vacuum aging processing 190
Degree, 2.4 hours.The material has mechanical property and electric conductivity under excellent normal temperature：Yield strength is 438MPa, tensile strength
For 594MPa, elongation percentage 5.2%, electric conductivity is (%IACS）：91（Conventional silver contact alloy is less than 80）.In addition, also have
High high-temperature behavior.Yield strength is 487MPa in 500-600 degree or so, and the surrender of conventional silver contact alloy is less than by force
350MPa.The alloy in 720 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt treatment without occur
Obvious burning phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can control
2.4wt.% or so.
Embodiment 2
One kind has 750 degree of melting high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloys.By weight percentage, chemical composition
For：Li: 1.6wt.%,In:1.2wt.%,Mg:0.7wt.%,Bi:0.8wt.%,Se:0.3wt.%,Pd:0.2wt.%,Mo:
0.2wt.%,Ho:0.1wt.%,S:0.2wt.%, B:0.6wt.%, surplus are silver.The preparation method of alloy：By what is as above matched
Raw material is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.It is molten to form alloy to 750 degree for sensing heating
Liquid, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is cast to heat for 10 minutes in 750 degree of insulations and pushes up same water
Semi-continuous casting is carried out in flat equipment, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, every time
Rolling under amount be 8%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：260 degree, 2.9
Individual hour.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 670 degree, 3.2 hours；Vacuum aging handles 190 degree,
2.4 hour.The material has mechanical property and electric conductivity under excellent normal temperature：Yield strength is 476MPa, and tensile strength is
621MPa, elongation percentage 5.2%, electric conductivity are (%IACS）：91（Conventional silver contact alloy is less than 80）.In addition, also there is height
High-temperature behavior.Yield strength is 493MPa in 500-600 degree or so, and the surrender of conventional silver contact alloy is less than by force
350MPa.The alloy in 750 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt treatment without occur
Obvious burning phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can control
4.1wt.% or so.
Embodiment 3
One kind has 760 degree of melting high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloys.By weight percentage, chemical composition
For：Li: 1.4wt.%,In:1.1wt.%,Mg:0.7wt.%,Bi:0.4wt.%,Se:0.3wt.%,Pd:0.2wt.%,Mo:
0.2wt.%,Ho:0.1wt.%,S:0.3wt.%, B:0.8wt.%, surplus are silver.The preparation method of alloy：By what is as above matched
Raw material is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible.It is molten to form alloy to 760 degree for sensing heating
Liquid, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect.Alloy liquid is cast to heat for 10 minutes in 760 degree of insulations and pushes up same water
Semi-continuous casting is carried out in flat equipment, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, every time
Rolling under amount be 9%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：260 degree, 2.9
Individual hour.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 670 degree, 3.2 hours；Vacuum aging handles 190 degree,
2.4 hour.The material has mechanical property and electric conductivity under excellent normal temperature：Yield strength is 484MPa, and tensile strength is
617MPa, elongation percentage 5.4%, electric conductivity are (%IACS）：91（Conventional silver contact alloy is less than 80）.In addition, also there is height
High-temperature behavior.Yield strength is 513MPa in 500-600 degree or so, and the surrender of conventional silver contact alloy is less than by force
350MPa.The alloy in 760 degree and 5 hours between carry out atmospheric environment under stir, refining etc. melt treatment without occur
Obvious burning phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can control
3.6wt.% or so.
Claims (3)
- A kind of 1. high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloys, it is characterised in that by weight percentage, the chemistry of alloy Composition is：Li: 0.5-2.0wt.%,In:1.0-1.5 wt.%,Mg:0.5-0.9wt.%,Bi:0.3-1.5wt.%,Se:0.2- 0.4wt.%,Pd:0.1-0.3wt.%,Mo:0.2-0.3wt.%,Ho:0.1-0.2wt.%,S:0.2-0.4wt.%, B: 0.5- 1.0wt.%, surplus are silver.
- 2. high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloy according to claim 1, it is characterised in that the preparation side of alloy Method comprises the following steps：As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible； Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect to 1050-1150 degree；By aluminium alloy Body is poured onto in the same level equipment of heat top and carries out semi-continuous casting for 10 minutes in the insulation of 1050-1150 degree, and it is 8- that ingot casting, which moves down speed, 15m/min。
- 3. high-strength high-conductivity oxidation-resisting Ag-Li-In silver lithium alloy according to claim 1, it is characterised in that include following processing Step：Ingot casting is subjected to deformation process at room temperature, amount is 5-10% under every time rolling；Every 3 passes need to carry out once Intermediate heat-treatment is hardened to eliminate processing, and technique is：260 degree, 2.9 hours；Final Heat Treatment Process after rolling is：Vacuum 670 degree, 3.2 hours of solution treatment；Vacuum aging handles 190 degree, 2.4 hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020152904A (en) * | 2019-03-12 | 2020-09-24 | 国立大学法人東海国立大学機構 | Semiconductor nanoparticles, their manufacturing methods, and light emitting devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020152904A (en) * | 2019-03-12 | 2020-09-24 | 国立大学法人東海国立大学機構 | Semiconductor nanoparticles, their manufacturing methods, and light emitting devices |
| JP7456591B2 (en) | 2019-03-12 | 2024-03-27 | 国立大学法人東海国立大学機構 | Semiconductor nanoparticles and their manufacturing method, and light emitting devices |
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