CN107739874A - A kind of fire-retardant high-strength height leads Cu Li Mg cupraliths - Google Patents
A kind of fire-retardant high-strength height leads Cu Li Mg cupraliths Download PDFInfo
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- CN107739874A CN107739874A CN201711062788.9A CN201711062788A CN107739874A CN 107739874 A CN107739874 A CN 107739874A CN 201711062788 A CN201711062788 A CN 201711062788A CN 107739874 A CN107739874 A CN 107739874A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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Abstract
The invention discloses one kind, fire-retardant high-strength height leads Cu Li Mg cupraliths and its processing technology between 1,200 1300 degree.By weight percentage, the chemical composition of alloy is：Li:0.4 2.3wt.%, Mg:1.0 2.5wt.%, Ca:1.0 1.5wt.%, Sr:0.5 1.0wt.%, Zn:0.1 0.4wt.%, Ti:0.2 0.4wt.%, Pr:0.1 0.2wt.%, Ho:0.1 0.3wt.%, B:0.1 0.2wt.%, surplus are copper.High-strength highly-conductive cupralith provided by the invention can be smelted under atmospheric environment.The alloy smelting processing method is simple, and production cost is easy to industrialize large-scale application than relatively low.
Description
Technical field
The present invention relates to technical field of alloy, specifically, is related to a kind of cupralith.
Background technology
Copper alloy possesses a series of good combination properties:Higher electric conductivity, good corrosion resistance, high resiliency mould
Amount, high intensity, good processing performance, resistance to marine pollution ability.Some copper alloys also have preferable cutting ability, wearability
Energy.Therefore many industries, such as watercraft fittings, valve rod and submarine pipeline are widely used in.Copper and copper alloy are in electrician and electronics
Deng occupying more important status in industrial department.Due to the appearance of integrated circuit, large scale integrated circuit etc., to conductive material copper
The requirement of alloy is no longer only this single performance of its electric conductivity, it is required that its performance is significantly diversified.Copper alloy with high strength and high conductivity
It is this kind of representative with excellent combination physical property and mechanical property.It both has high intensity and good plasticity, again
Inherit the excellent conductive capability of fine copper, be prepare resistance welding electrode, seam weld roller, torch-tip, electrical engineering switch touch bridge,
Collector ring, armature, rotor, electric tool steering gear, conticaster crystallizer liner, circuit lead frame, the electricity of generator
The excellent material of car and electric trains aerial condutor etc..
The development of recent decades high-speed railway locomotive, and railway speed increase turn into focus, traditional copper alloy with high strength and high conductivity
This requirement can not gradually be met, cost height, softening temperature be present using more for Kufil, Kufil at present
The number of disadvantages such as low, limited strength, thus develop it is new it is high-strength, high lead, the cupralith of high abrasion, high softening temperature into
For certainty.Cupralith is broadly divided into two major classes in the world at present：One kind is to add the cupralith of trace lithium, main with to be high
By force, highly conductive high-wear-resistant alloy；It is another kind of, it is the cupralith for adding high-content Li, the main shielding effect using lithium to neutron
Should, the shielding material as nuclear reactor.Copper lithium system's alloy is with a wide range of applications as high-strength highly-conductive electric material.
The characteristics of cupralith maximum is loose because of the easy oxidizing fire of cupralith melt, generation in smelting process
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 cupralith melt in fusion process.Therefore, at present in the smelting of cupralith
Alloy preparation is typically carried out using the method for argon gas protection, and smelting temperature is at 1200 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 cupralith of the method melting of argon gas protection, the recovery rate of final lithium only has 10-50wt.% 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.Thus it is being badly in need of greatly
Industry and national defence of the scale using cupralith, always there is existing yield is few, technique is cumbersome, and cost height etc. is badly in need of gram
The present situation of clothes.
Seek more preferable smelting process as one of key issue in cupralith application study and industrialization.Pass through conjunction
The method of aurification reaches the oxidation for preventing the cupralith melt in smelting process, is to solve the development that cupralith 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 cupralith production
Product will also possess gratifying mechanical strength simultaneously, and the mechanical property that can at least reach conventional cupralith is horizontal.Thus
The content of various alloying elements how is balanced in cupralith, prepares fire-retardant under atmospheric environment and prevents lithium in melting
The cupralith to be volatilized in journey, and possess excellent mechanical property, it is current one urgent problem to be solved of cupralith.
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 1200-1300 degree atmospheric conditions
Carry out the high-strength highly-conductive Cu-Li-Mg cupraliths and its processing technology of melting.And finally produced in the alloy of this temperature range melting
Product have the mechanical property of existing cupralith, and good temperature-room type plasticity and antioxygenic property.This method, which also has, to be produced into
This is 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-strength highly-conductive Cu-Li-Mg cupraliths with the melting between 1200-1300 degree.By weight percentage, close
Gold composition be：Li: 0.4-2.3wt.%,Mg:1.0-2.5wt.%,Ca:1.0-1.5wt.%,Sr:0.5-1.0wt.%,Zn:
0.1-0.4wt.%, Ti: 0.2-0.4wt.%, Pr:0.1-0.2wt.%,Ho:0.1-0.3wt.%, B:0.1-0.2wt.%,
Surplus is copper.The weight that the cupralith loses in fusion process because of the reason such as volatilization and formation clinker is in 2.0-
5.0wt.% or so.
The preparation method of above-mentioned cupralith, 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 1200-1300 degree, and is stirred using electromagnetism
Effect is mixed to be sufficiently stirred 10 minutes or so.Alloy liquid is incubated 10 minutes in 1200-1300 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 8-15% to roll lower amount；Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：670 degree,
2.1 hours；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 760 degree, 4.5 hours；Vacuum aging processing 250
Degree, 1.8 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 cupralith under current high temperature and needs to carry out argon gas protection melting in melting carries
A kind of novel protection solution is supplied.By the main and secondary addition element in preferred alloy, so as to effectively prevent
Burning and excessive Evaporation Phenomenon occur for cupralith under melting state., not only can be significantly by preferable alloying method
The shortcomings that reducing alloying element usage amount, extraordinary flame retardant effect can also be obtained and improve lithium recovery rate, in final products
The content of lithium 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 Cu-Li-Mg cupraliths that this patent proposes have extremely excellent fire resistance in the quiescent state, can reach in 1200-
5 hours are stood without obvious burning under atmospheric environment in 1300 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 nitrogen and oxygen intrusion aluminium alloy.
（3）For high-strength highly-conductive Cu-Li-Mg cupraliths after lithium is added, lithium has excellent deoxidation getter action.This
Outside, the alloy has low liquid-solid phase solidification temperature range, and hot cracking tendency is big when can solve to cast, and casting is empty and loose bright
Aobvious product yield rate is low to wait technical barrier.
（4）High-strength highly-conductive Cu-Li-Mg cupraliths are stirred between 1200-1300 degree, at the melt such as refining
Reason is without occurring obvious burning phenomenon, and the cupralith loses in fusion process because of the reason such as volatilization and formation clinker
Weight is less than 5.0wt.% or so.The material has high tensile strength 800-900MPa, and conductance (%IACS) can maintain
In 94-96 (traditional material is less than 80).And the material has extremely excellent high-temperature behavior, in 400-500 degree or so, tension is strong
Degree can maintain 500-600MPa, and tensile strength is less than 450MPa to traditional copper alloy at this temperature.
（5）Smelting processing method is simple, and production cost is reduced to equipment requirement than relatively low.Ensureing possess anti-flammability
While, also make it that mechanical property is further improved under alloy service life and high temperature, be easy to industrialize large-scale application.
Embodiment
Embodiment 1
One kind has 1220 degree of smelting flame-proof high-strength highly-conductive Cu-Li-Mg cupraliths.By weight percentage, the chemistry of alloy
Composition is：Li: 1.9wt.%,Mg:2.1wt.%,Ca:1.4wt.%,Sr:0.8wt.%,Zn:0.3wt.%,Ti:0.2wt.%,
Pr:0.1wt.%,Ho:0.2wt.%, B:0.1wt.%, surplus are copper.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 profit to 1220 degree
It is sufficiently stirred 10 minutes or so with galvanomagnetic-effect.Alloy liquid is cast to heat top same level equipment for 10 minutes in 1220 degree of insulations
Interior carry out semi-continuous casting, it is 8m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, under every time rolling
Measure as 9%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：It is 670 degree, 2.1 small
When；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 760 degree, 4.5 hours；Vacuum aging handles 250 degree, and 1.8 is small
When.The alloy in 1220 degree and 5 hours between stirred under atmospheric environment, the melt treatment such as refining is obvious without occurring
Burning phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can be controlled on a 2.8wt.% left sides
It is right.The material has a high tensile strength 860MPa, and conductance (%IACS) can maintain 95 (traditional copper alloy is less than
80).And the material has extremely excellent high-temperature behavior, at 450 degree or so, tensile strength can maintain 520MPa, and traditional
Tensile strength is less than 450MPa to copper alloy at this temperature.
Embodiment 2
One kind has 1250 degree of smelting flame-proof high-strength highly-conductive Cu-Li-Mg cupraliths.By weight percentage, the chemistry of alloy
Composition is：Li: 1.6wt.%,Mg:1.4wt.%,Ca:1.2wt.%,Sr:0.9wt.%,Zn:0.2wt.%,Ti:0.3wt.%,
Pr:0.1wt.%,Ho:0.2wt.%, B:0.1wt.%, surplus are copper.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 profit to 1250 degree
It is sufficiently stirred 10 minutes or so with galvanomagnetic-effect.Alloy liquid is poured onto in the same level equipment of heat top for 10 minutes in 1250 degree of insulations
Semi-continuous casting is carried out, it is 10m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, under every time rolling
Measure as 12%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：It is 670 degree, 2.1 small
When；Final Heat Treatment Process after rolling is：Vacuum solid solution handles 760 degree, 4.5 hours；Vacuum aging handles 250 degree, and 1.8 is small
When.The alloy in 1250 degree and 5 hours between stirred under atmospheric environment, the melt treatment such as refining is obvious without occurring
Burning phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can be controlled on a 3.1wt.% left sides
It is right.The material has a high tensile strength 895MPa, and conductance (%IACS) can maintain 94 (traditional copper alloy is less than
80).And the material has extremely excellent high-temperature behavior, at 450 degree or so, tensile strength can maintain 560MPa, and traditional
Tensile strength is less than 450MPa to copper alloy at this temperature.
Embodiment 3
One kind has 1280 degree of smelting flame-proof high-strength highly-conductive Cu-Li-Mg cupraliths.By weight percentage, the chemistry of alloy
Composition Li: 1.9wt.%,Mg:2.3wt.%,Ca:1.2wt.%,Sr:0.8wt.%,Zn:0.2wt.%,Ti:0.3wt.%,Pr:
0.1wt.%,Ho:0.2wt.%, B:0.1wt.%, surplus are copper.The preparation method of alloy：As above the raw material matched is added to greatly
In electric induction furnace under compression ring border, and use silicon carbide crucible.Sensing heating forms alloy solution, and utilize electricity to 1280 degree
Magnetic effect is sufficiently stirred 10 minutes or so.Alloy liquid is poured onto in the same level equipment of heat top for 10 minutes in 1280 degree of insulations and carried out
Semi-continuous casting, it is 11m/min that ingot casting, which moves down speed,.Ingot casting is subjected to deformation process at room temperature, amount is under every time rolling
10%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：670 degree, 2.1 hours；Roll
Final Heat Treatment Process after system is：Vacuum solid solution handles 760 degree, 4.5 hours；Vacuum aging handles 250 degree, 1.8 hours.Should
Alloy in 1280 degree and 5 hours between stirred under atmospheric environment, the melt treatment such as refining is without occurring obvious scaling loss
Phenomenon, and material raw material proportion of goods damageds caused by evaporating and being formed due to clinker can be controlled in 4.6wt.% or so.Should
Material has high tensile strength 845MPa, and conductance (%IACS) can maintain for 95 (traditional copper alloy is less than 80).And should
Material has extremely excellent high-temperature behavior, and at 450 degree or so, tensile strength can maintain 523MPa, and traditional copper alloy exists
Tensile strength is less than 450MPa at a temperature of this.
Claims (3)
1. a kind of fire-retardant high-strength height leads Cu-Li-Mg cupraliths, it is characterised in that by weight percentage, alloy chemistry into
It is divided into：Li:0.4-2.3wt.%,Mg:1.0-2.5wt.%,Ca:1.0-1.5wt.%,Sr:0.5-1.0wt.%,Zn:0.1-
0.4wt.%,Ti:0.2-0.4wt.%,Pr:0.1-0.2wt.%,Ho:0.1-0.3wt.%, B:0.1-0.2wt.%, surplus are copper.
2. fire-retardant high-strength height leads Cu-Li-Mg cupraliths 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
1200-1300 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 1200-1300 degree and carries out semi-continuous casting, it is 8- that ingot casting, which moves down speed,
12m/min。
3. fire-retardant high-strength height leads Cu-Li-Mg cupraliths according to claim 1, it is characterised in that includes following processing step
Suddenly：Ingot casting is subjected to deformation process at room temperature, amount is 8-15% under every time rolling；Every 3 passes are needed in carrying out once
Between heat treatment eliminate processing hardening, technique is：670 degree, 2.1 hours；Final Heat Treatment Process after rolling is：Vacuum is consolidated
It is molten to handle 760 degree, 4.5 hours；Vacuum aging handles 250 degree, 1.8 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711062788.9A CN107739874A (en) | 2017-11-02 | 2017-11-02 | A kind of fire-retardant high-strength height leads Cu Li Mg cupraliths |
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| CN201711062788.9A CN107739874A (en) | 2017-11-02 | 2017-11-02 | A kind of fire-retardant high-strength height leads Cu Li Mg cupraliths |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097659A (en) * | 2018-08-31 | 2018-12-28 | 广州宇智科技有限公司 | A kind of corrosion-resistant low gold content seedling billon of yellow low density high hardness and its technique |
-
2017
- 2017-11-02 CN CN201711062788.9A patent/CN107739874A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097659A (en) * | 2018-08-31 | 2018-12-28 | 广州宇智科技有限公司 | A kind of corrosion-resistant low gold content seedling billon of yellow low density high hardness and its technique |
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