CN107760908A - One kind has high heat conduction and conductive silver lithium alloy as electric contact material - Google Patents
One kind has high heat conduction and conductive silver lithium alloy as electric contact material Download PDFInfo
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- CN107760908A CN107760908A CN201711123050.9A CN201711123050A CN107760908A CN 107760908 A CN107760908 A CN 107760908A CN 201711123050 A CN201711123050 A CN 201711123050A CN 107760908 A CN107760908 A CN 107760908A
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- 229910000733 Li alloy Inorganic materials 0.000 title claims abstract description 34
- 239000001989 lithium alloy Substances 0.000 title claims abstract description 34
- WUALQPNAHOKFBR-UHFFFAOYSA-N lithium silver Chemical compound [Li].[Ag] WUALQPNAHOKFBR-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 title abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 39
- 239000000956 alloy Substances 0.000 claims abstract description 39
- 229910052709 silver Inorganic materials 0.000 claims abstract description 15
- 239000004332 silver Substances 0.000 claims abstract description 15
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 6
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 6
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 13
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 230000005352 galvanomagnetic phenomena Effects 0.000 claims description 4
- 229910001316 Ag alloy Inorganic materials 0.000 abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 13
- 229910052744 lithium Inorganic materials 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 238000002844 melting Methods 0.000 description 13
- 238000003723 Smelting Methods 0.000 description 7
- 238000005275 alloying Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000007499 fusion processing Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000636 Ce alloy Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- UYKQQBUWKSHMIM-UHFFFAOYSA-N silver tungsten Chemical compound [Ag][W][W] UYKQQBUWKSHMIM-UHFFFAOYSA-N 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910001097 yellow gold Inorganic materials 0.000 description 1
- 239000010930 yellow gold Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Contacts (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses one kind to have high heat conduction and conductive Ag Li Sm silver lithium alloys and its processing technology.By weight percentage, alloy composition is：Li:0.5‑2.5wt.%,V:1.0‑1.8wt.%,Pt:0.2‑0.4wt.%,Nb:0.3‑0.8wt.%,Sr:1.0‑1.6wt.%,Ca:0.2‑0.4wt.%,Sm:0.2‑0.5wt.%,Ho:0.1‑0.2wt.%,S:0.5 0.8wt.%, B:0.5 0.9wt.%, surplus are silver.Relative to conventional electrical contacts material silver alloy, the material has excellent mechanical performance, high conductivity and high heat transfer coefficient.
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 melting has high heat conduction and conductive Ag-Li-Sm silver lithium alloy and its processing technology.And in the conjunction of this temperature range melting
Golden 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
There is production cost low, the characteristics of being easy to mass produce.
To achieve these goals, the present invention adopts the following technical scheme that：
It is a kind of between 1050-1150 degree melting with high heat conduction and conductive Ag-Li-Sm silver lithium alloy.Percentage by weight
Than meter, the composition of alloy is：Li: 0.5-2.5wt.%,V:1.0-1.8wt.%,Pt:0.2-0.4wt.%,Nb:0.3-
0.8wt.%,Sr:1.0-1.6wt.%,Ca:0.2-0.4wt.%,Sm:0.2-0.5wt.%,Ho:0.1-0.2wt.%,S: 0.5-
0.8wt.%, B:0.5-0.9wt.%, surplus are silver.The silver-colored lithium alloy is in fusion process because the reason such as volatilization and formation clinker
And the weight lost is 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 8-12m/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：250 degree,
3.2 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 680 degree, 3.9 hours；Vacuum aging processing 170
Degree, 2.8 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-Sm 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-Sm 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 under excellent normal temperature：Yield strength is 400-520MPa, and tensile strength is
580-640MPa, elongation percentage 4-8%.High conduction performance (%IACS）：90-94, conventional silver contact alloy are less than 80.It is and high
Heat transfer coefficient：360-380W/m ﹒ K, conventional silver alloys are less than 340 W/m ﹒ K.
Embodiment
Embodiment 1
One kind is with 720 degree of meltings with high heat conduction and conductive Ag-Li-Sm silver lithium alloy.By weight percentage, chemical composition
For：Li: 2.1wt.%,V:1.4wt.%,Pt:0.3wt.%,Nb:0.5wt.%,Sr:1.2wt.%,Ca:0.2wt.%,Sm:
0.3wt.%,Ho:0.1wt.%,S:0.6wt.%, B:0.7wt.%, 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 8m/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：250 degree, 3.2
Individual hour；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 680 degree, 3.9 hours；Vacuum aging handles 170 degree,
2.8 hour.The material has mechanical property under excellent normal temperature：Yield strength is 435MPa, tensile strength 598MPa, is extended
Rate is 5.2%.High conduction performance (%IACS）：92, conventional silver contact alloy is less than 80.And high heat transfer coefficient：365W/m ﹒ K,
Conventional silver alloys are less than 340 W/m ﹒ K.The alloy in 720 degree and 5 hours between carry out atmospheric environment under stir, refining etc.
Melt treatment is without occurring obvious burning phenomenon, and material raw material caused by evaporating and being formed due to clinker are lost
Rate can be controlled in 2.1wt.% or so.
Embodiment 2
One kind has 750 degree of melting high heat conductions and conductive Ag-Li-Sm silver lithium alloy.By weight percentage, chemical composition is：
Li: 1.8wt.%,V:1.4wt.%,Pt:0.3wt.%,Nb:0.5wt.%,Sr:1.2wt.%,Ca:0.3wt.%,Sm:0.3wt.%,
Ho:0.2wt.%,S:0.6wt.%, B:0.8wt.%, surplus are silver.The preparation method of alloy：As above the raw material matched is added
In electric induction furnace under to atmospheric environment, and use silicon carbide crucible.Sensing heating forms alloy solution, and utilize to 750 degree
Galvanomagnetic-effect is sufficiently stirred 10 minutes or so.Alloy liquid is cast in the same level equipment of heat top for 10 minutes in 750 degree of insulations
Semi-continuous casting is carried out, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, amount under every time rolling
For 7%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：250 degree, 3.2 hours；
Final Heat Treatment Process after rolling is：Vacuum solid solution handles 680 degree, 3.9 hours；Vacuum aging handles 170 degree, 2.8 hours.
The material has mechanical property under excellent normal temperature：Yield strength is 497MPa, tensile strength 586MPa, and elongation percentage is
6.3%.High conduction performance (%IACS）：91, conventional silver contact alloy is less than 80.And high heat transfer coefficient：372W/m ﹒ K, tradition
Silver alloy is less than 340 W/m ﹒ K.The alloy in 750 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 3.8wt.% or so.
Embodiment 3
One kind has 760 degree of melting high heat conductions and conductive Ag-Li-Sm silver lithium alloy.By weight percentage, chemical composition is：
Li: 1.8wt.%,V:1.2wt.%,Pt:0.3wt.%,Nb:0.5wt.%,Sr:1.4wt.%,Ca:0.3wt.%,Sm:0.4wt.%,
Ho:0.1wt.%,S:0.6wt.%, B:0.6wt.%, surplus are silver.The preparation method of alloy：As above the raw material matched is added
In electric induction furnace under to atmospheric environment, and use silicon carbide crucible.Sensing heating forms alloy solution, and utilize to 760 degree
Galvanomagnetic-effect is sufficiently stirred 10 minutes or so.Alloy liquid is cast in the same level equipment of heat top for 10 minutes in 760 degree of insulations
Semi-continuous casting is carried out, it is 9m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, amount under every time rolling
For 8%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：250 degree, 3.2 hours；
Final Heat Treatment Process after rolling is：Vacuum solid solution handles 680 degree, 3.9 hours；Vacuum aging handles 170 degree, 2.8 hours.
The material has mechanical property under excellent normal temperature：Yield strength is 512MPa, tensile strength 628MPa, and elongation percentage is
6.3%.High conduction performance (%IACS）：92, conventional silver contact alloy is less than 80.And high heat transfer coefficient：371W/m ﹒ K, tradition
Silver alloy is less than 340 W/m ﹒ K.
Claims (3)
1. a kind of high heat conduction and conductive Ag-Li-Sm silver lithium alloy, it is characterised in that by weight percentage, alloy chemistry into
It is divided into：Li:0.5-2.5wt.%,V:1.0-1.8wt.%,Pt:0.2-0.4wt.%,Nb:0.3-0.8wt.%,Sr:1.0-
1.6wt.%,Ca:0.2-0.4wt.%,Sm:0.2-0.5wt.%,Ho:0.1-0.2wt.%,S:0.5-0.8wt.%, B: 0.5-
0.9wt.%, surplus are silver.
2. high heat conduction and conductive Ag-Li-Sm silver lithium alloy according to claim 1, it is characterised in that the preparation method of alloy
Comprise the following steps：As above the raw material matched is added in the electric induction furnace under atmospheric environment, and uses silicon carbide crucible；Sense
1050-1150 degree should be heated to, forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect；By alloy liquid
It is poured onto within 10 minutes in the same level equipment of heat top in the insulation of 1050-1150 degree and carries out semi-continuous casting, it is 8- that ingot casting, which moves down speed,
12m/min。
3. high heat conduction and conductive Ag-Li-Sm silver lithium alloy according to claim 1, it is characterised in that include following processing step
Suddenly：Ingot casting is subjected to deformation process at room temperature, amount is 5-10% under every time rolling；Every 3 passes are needed in carrying out once
Between heat treatment eliminate processing hardening, technique is：250 degree, 3.2 hours；Final Heat Treatment Process after rolling is：Vacuum is consolidated
It is molten to handle 680 degree, 3.9 hours；Vacuum aging handles 170 degree, 2.8 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123050.9A CN107760908A (en) | 2017-11-14 | 2017-11-14 | One kind has high heat conduction and conductive silver lithium alloy as electric contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123050.9A CN107760908A (en) | 2017-11-14 | 2017-11-14 | One kind has high heat conduction and conductive silver lithium alloy as electric contact material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107760908A true CN107760908A (en) | 2018-03-06 |
Family
ID=61273508
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711123050.9A Withdrawn CN107760908A (en) | 2017-11-14 | 2017-11-14 | One kind has high heat conduction and conductive silver lithium alloy as electric contact material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107760908A (en) |
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2017
- 2017-11-14 CN CN201711123050.9A patent/CN107760908A/en not_active Withdrawn
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Application publication date: 20180306 |
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