CN1818108A - High-strength and conductive thin band of copper alloy and production thereof - Google Patents
High-strength and conductive thin band of copper alloy and production thereof Download PDFInfo
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Abstract
The invention opened a high strength and conductance aldary thin strip which includes: Cr 0.05%-0.10wt%; Zr 0.05%-0.50%; Mg 0.05-0.20wt%; (Ce+Y)<=0.20%; The residue is Cu. The process is: smelt the mother alloy; producing the alloy by the two roll splat cooling method; solid solution of the alloy and deformation, aging treatment. The strength can reach above 550-600MPa and the specific conductivity can keep above 80% IACS, and the life is improved to 3-5 times, the sintering can reach 550DEG C; the slip is less than 10% in the 300DEG C, the elongation percentage is above 5%, also the alloy has the performance of resistance to elevated temperatures and stand wear and tear.
Description
Affiliated technical field
The present invention relates to a kind of thin band of copper alloy and preparation technology thereof who possesses high strength and high conduction performance.It can be used for the numerous areas such as rotor bar, high-thrust rocket liner of the heat exchange material of conductor material, Coastal Power Station in ring header, armature rotor, power tool phase converter, conticaster crystallizer liner, circuit lead frame material, electric car and overhead wire for electric locomotive that resistance welding electrode, seam welding roll wheel, moment welding nozzle, electric works switch touch bridge, generator, high impulse magnetic field and corrosion-resistant member, large high-speed turbo-generator.
Background technology
High strength and high conductivity are a pair of conflicting characteristic, and be no exception to Cu alloy material.At present, the ultimate principle of developing the copper alloy with high strength and high conductivity material usually is: adopt the alloying element of low solid solubility to add in the copper, handle by high temperature solid solution, make alloying element form supersaturated solid solution in the copper matrix, intensity improves, specific conductivity reduces; After the ageing treatment, supersaturated solid solution decomposes, and a large amount of alloying elements is separated out in the copper matrix with precipitated phase, and specific conductivity improves rapidly, and intensity also is able to further raising because of the dispersion-strengthened action of timeliness precipitated phase simultaneously.
Because the selection of alloy system interalloy element will be taken all factors into consideration its influence to alloy electric conductivity and precipitation strength two aspects.The height of electric conductivity depends primarily on: the type of alloying element; Alloying element is to the influence of sosoloid electric conductivity; Alloying element equilibrium solubility at room temperature; Factors such as the type of precipitated phase, quantity, form and size.
The effect of precipitation strength depends primarily on: the type of alloying element reaches the influence to the changes in solubility curve; The limit of solubility of alloying element in copper; Equilibrium solubility at room temperature; The expansion of solid solubility under the rapid solidification condition; The type of precipitated phase reaches the relation with matrix; The form of precipitated phase, size, distribution; The thermostability of precipitated phase etc.
The requirement of comprehensive above-mentioned two aspects, the definite of alloy system should meet the following conditions:
(1) the alloying element solid solution is in copper, and is little to the influence of the resistivity of copper matrix.
(2) when high temperature, it is big that the solubility limit of alloying element in the copper matrix wanted.
What (3) at room temperature, the equilibrium solubility of alloying element in the copper matrix will be tried one's best is little.
(4) behind rapid solidification, the limit solid solubility of alloying element in the copper matrix can be expanded greatly.
(5) in precipitation process, the precipitated phase disperse distributes and with matrix certain coherence relation is arranged.
(6) precipitated phase good stability is difficult for growing up when high temperature.
For further improving the copper alloy with high strength and high conductivity over-all properties, in copper alloy, add rare earth element (RE).In metallurgical industry, rare earth b referred to as " VITAMIN " of metallic substance, adds a small amount of even micro-rare earth in metal, just can obviously improve its chemistry or mechanical property.The adding of rare earth element can cause alloy substrate to purify and grain refining.Rare earth element has very high chemically reactive, in fusion process, be easy to hydrogen, oxygen, sulphur and some impurity in conjunction with forming high melting compound and entering slag mutually, play the effect of dehydrogenation, deoxidation, desulfurization and removal of impurities, matrix is purified, thereby interatomic bonding force is strengthened, and alloy strength raises.In addition, also can form infusible compound with many fusible impurity in the copper, the fine particle of these compounds is suspended in the melt, becomes the crystallization nuclei of disperse, makes alloy grain obtain refinement, and intensity also is improved.Rare earth element raises the electric conductivity of alloy to the cleaning action of matrix to some extent; Crystal boundary increases in the alloy though grain refining makes, because crystalline conductive performance and crystalline orientation are irrelevant, grain refining only makes crystal boundary increase, thereby very little to the conductivity influence of copper.
Because cold working makes the electric conductivity of material reduce greatly when significantly improving the strength of materials, so general cold-work strengthening method is used seldom separately, normally as the auxiliary promotion means of ageing strengthening, as adopting solid solution+cold deformation+timeliness or solid solution+timeliness+cold deformation technology.
Working hardening is in the intensity that improves copper, and is then little to the electric conductivity influence.Because working hardening is to cause lattice defect that copper is strengthened by producing dislocation, room in the crystal, thereby the electric conductivity of copper descends to some extent.
Ageing strengthening generally is to adopt the alloying element of low solid solubility to dissolve in the copper matrix, handles by high temperature solid solution, and alloying element forms supersaturated solid solution in copper, cause copper crystal lattice seriously to distort, and intensity is improved greatly, and electric conductivity worsens.After ageing treatment, most alloying element is separated out from sosoloid again, forms the precipitated phase that disperse distributes, from and the electric conductivity of alloy is recovered rapidly, and these disperse phases have stoped the slip of crystal boundary and dislocation effectively, thereby make copper alloy still keep higher intensity.The classical electron theory points out, it is more much better than than second scattering process that causes mutually to the scattering process of electronics to be solid-solubilized in the lattice distortion that the atom in the copper matrix causes, thereby ageing strengthening is to prepare the method that is most widely used in the high strength high-conductivity copper alloy.The alloying element that produces ageing strengthening should have following two conditions: the one, and the solid solubility when high temperature and low temperature in copper differs bigger, can produce enough disperse phase; The 2nd, the solid solubility during room temperature in copper is minimum, to keep the high conductivity of copper matrix.These alloying elements generally have Cr, Zr, Be, Fe, Nb etc., and wherein the age hardening effect of Cr and Zr is comparatively strong, and maximum solid solution degree can be up to 0.8% 1076 ℃ the time in solid-state copper as Cr, and is 0.04% in the time of 450 ℃, reduces to 0.03% when room temperature; Zr maximum solid solution degree in solid-state copper is 0.15% in the time of 966 ℃, and is 0.02% in the time of 450 ℃, then is 0.01% when room temperature.Introduce the copper alloy of these two kinds of alloying elements, after overaging, electric conductivity can return to a higher level, so Cu-Cr, Cu-Zr and Cu-Cr-Zr are the with the fastest developing speed of alloy, its application is also extensive.
Owing to be subjected to the restriction of alloying element solid solubility limit in copper, the amplitude of common solid solution aging method raising alloy strength is very limited.At this problem, the solution of now taking is to produce high-intensity high-conductivity copper alloy with rapid solidification method.Rapid solidification method is meant that alloy melt sharply is cooled to crystallite or amorphous method, and its speed of cooling generally reaches 10
4More than the K/s.Rapid solidification method can make solidifying of alloy greatly depart from balance, the solid solubility of alloying element significantly improves, thereby improved after the ageing treatment quantity of second phase in the matrix, and make second to present tiny, disperse distribution mutually, help under the prerequisite that keeps high conductivity, significantly improving the intensity of alloy.Rapid solidification can also obtain tiny crystal grain simultaneously, and the refined crystalline strengthening effect is obvious.As being aided with certain deformation before the rapidly solidified alloy timeliness or after the timeliness, the intensity of alloy is further improved.
At present, Chang Yong rapid solidification method is divided into following three classes usually: atomization is produced powder; Melt revolves casting produces the strip arrowband; The surface rapid solidification.Wherein, it is the method for producing band that melt revolves casting, as the production of strip, arrowband, employing be that single roller revolves casting quench technology.It is cylindrical metal liquid (the molten metal column diameter is less than 1mm usually) to be ejected on the cooling roller of high speed rotating be able to rapid solidification that single roller revolves the casting quench, and its speed of cooling can reach 10
6～10
7K/s.The thickness of the prepared band of this method is 20～80 μ m, width＜50mm.By control process parameters, under atmospheric environment, can stablize and obtain that surface quality is good, the crystallite strip of non-oxidation.Adopt single roller to revolve copper alloy that the casting quench obtains after ageing treatment, can keep high conductivity (under＞80%IACS) the prerequisite, to increase substantially its intensity and hardness.As single roller chilling Cu-0.26Cr-0.78Zr-0.05Mg alloy thin band through 550 ℃ of timeliness 3 hours, its electric conductivity be 81%IACS, microhardness up to HV240, this is that the high-intensity high-conductivity copper alloy over-all properties of being reported at present is best.But because single roller revolves the casting quench when preparing copper alloy belt, be by high speed rotating list roller molten alloy liquid to be thrown away, preparation-obtained alloy thin band thinner thickness and surface finish are not high, thereby make it to be difficult to use industrial directly obtaining.
Summary of the invention
The objective of the invention is to propose a kind of thin band of copper alloy and preparation technology thereof who possesses high strength and high conduction performance.Make it possess high strength and high conduction performance, also have higher high-temperature behavior and wear resisting property simultaneously.
For achieving the above object, the technical scheme taked of the present invention: the composition of its thin band of copper alloy is: Cr 0.05%～1.00wt%; Zr 0.05%～0.50%; Mg 0.05～0.20wt%; Mishmetal (Ce+Y)≤0.20%; Surplus is Cu.
The proportioning of described mishmetal (Ce+Y) is: Wt%Ce: Wt%Y=1: 1
The processing method that the present invention prepares above-mentioned thin band of copper alloy comprises:
(1) melting of mother alloy;
(2) two roller spray band quench are produced alloy;
(3) solid solution of alloy, solid solution after strain and ageing treatment.
Wherein: the preparation of mother alloy is to carry out in ZXG-400 type direct current vacuum arc fumace, and its smelting temperature is 1200～1400 ℃.
Two roller spray band quench are provided with two cooling rollers, and the rotating speed of these two cooling rollers is 2000～2800rpm; Spraying pressure is 0.5～1.0MPa; Nozzle diameter is 0.5～1.0mm; Nozzle is 15～25mm from two roller spacings; Restraint force is 60～100N between roller;
The solution treatment of described alloy is to handle in chamber type electric resistance furnace, and its temperature is 850～960 ℃, and soaking time is 1h;
Distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control;
Described ageing treatment is to carry out in being connected with the electric tube furnace of nitrogen protection, and temperature-controlled precision is ± 2 ℃, and aging temp is 440～520 ℃, and soaking time is 0.5～4h, air cooling.
The Cu alloy material that the present invention proposes belongs to the Cu alloy material that a kind of novel high-strength highly-conductive has both.The introducing of Cr mainly is that it has certain solution strengthening effect to the copper matrix, and the content of working out Cr in this alloy is 0.05%～1.00%; The introducing of Zr mainly is the significant ageing strengthening of considering that it had, the too high electroconductibility that will reduce alloy greatly of Zr content, and that content is crossed low its strengthening effect that is had is not remarkable, working out Zr in this alloy is 0.05%～0.50%; The adding of Mg element is suitable with the Zr element interaction, can improve type, size and the distribution of precipitated phase, further improves dispersion-strengthened effect, and its add-on is 0.05%～0.20%; Adding rare earth element (Ce and Y) mainly has been to purify the crystalline effect, and according to the correlative study achievement, its add-on should be controlled at below 0.20% and be advisable.
Preparation technology's of the present invention preparating mechanism and method are described as follows:
The calculating of rapid solidification speed of cooling
Quick setting method (comprising that single roller revolves casting, two roller and revolves casting and multistage atomizing) all is by closely pasting mutually between coating liquid alloy and the high thermal conductivity coefficient substrate, realizes the heat transfer by conduction that is exceedingly fast, thereby obtains very high speed of cooling.Because the end face of alloy firm does not contact with cold substrate with side, it is relatively very limited to dispel the heat, and can think unidirectional heat transfer.
Different according to contact property between alloy melt and the heat-eliminating medium have three types cooling in the alloy melt rapid solidification.When interface Heat transfer coefficient h was tending towards very big, the thermograde in alloy and substrate was all bigger, and the no temperature difference exists on the interface, and this situation belongs to the desirable type of cooling.On the other hand, when interface Heat transfer coefficient h very hour, the thermograde in alloy and substrate is all very little, has the bigger temperature difference to exist on the interface, this situation belongs to and is newton's type of cooling, it is fully by interface control.When state of interface between the two the time, is the intercooling mode between above-mentioned.Usually judge that with Nusselt parameter N=hd/k (d is a sample thickness, and k is the thermal conductivity of metal) which kind of type of cooling plays a leading role: when N＞30, be the desirable type of cooling; When N＜0.015, be newton's type of cooling; When 0.015＜N＜30, be the intercooling mode.Flash set technology of the present invention, h is generally 10
5～10
6W/m2k, d are tens to tens μ m.Though Nusselt parameter＜0.015 or＞0.015 much smaller than 30, so the type of cooling belongs to newton's type of cooling or near the intercooling mode of newton's type of cooling.
Under newton's type of cooling, when the process of cooling of liquid metal on substrate began, its speed of cooling was:
In the formula, T
bBe underlayer temperature, T
0Be the starting temperature of liquid alloy, C
pBe the specific heat of metal, ρ is a density metal, and h is an interfacial heat transfer coefficient, and d is a sample thickness.
Two rollers rotation chillings are because the two sides of strip chilling simultaneously, its speed of cooling type of cooling of still being born in the year of cattle, and speed of cooling is calculated and can be adopted (formula 1) to carry out, but d gets twin-roll thin strip thickness half.Bring the speed of cooling that (formula 1) can calculate two roller rapid solidification thin band of copper alloy into and be about 4.0 * 10
5K/s.
The analysis of two roller spray band quenching process
When metal liquid flowed between two rollers, the process of setting of metal was divided into following three kinds of situations usually:
First kind of situation is to solidify before metal liquid enters two roller lines of centres, formed strip thickness is bigger than copper roller gap, will produce gross distortion when this alloy that has solidified enters two roller line of centres position, whole process is equivalent to hot rolling deformation.So that strip when producing mechanical deformation, final strip thickness should be greater than two rollers gap when the restraint force deficiency of roller.This situation can often appear at and adopt under giant silica tube and low flow and the slow speed conditions.
Second kind of situation is that the freezing interface just in time is positioned on two roller lines of centres, only needs the subtle change in two roller gaps to realize when forming strip, and the thickness of its strip is close with two roller gaps.
The third situation is that strip just solidifies under two roller lines of centres fully.To expect the successive strip in this case, the solid phase of solidifying earlier should be thicker residual liquid solidifies by radiation and thermal conduction to keep not solidified liquid phase, setting rate is slower, the thickness of final strip is also close with two roller spacings.
Test is found, as jet velocity V
JWith rotating speed V
RRatio V
J/ V
RIn the time of between 0.5～1.0, can form the successive strip.As jet velocity V
JRotating speed V greater than roller
RThe time, between two rollers, form the accumulation of liquid metal, make metal liquid effluent occur, and the thickness of strip is changed.Work as V
J/ V
R≤ 0.5 o'clock, the metal liquid that is provided was not enough to form the successive strip.
Certain speed than scope in (0.5≤V
J/ V
R≤ 1.0), the thickness of strip and both speed are irrelevant, and thickness depends primarily on the spacing between two rollers.
Cu alloy material of the present invention consists predominantly of Cu, Cr, Zr, Mg and trace rare-earth element elements such as (Ce and Y), Cu-Cr-Zr-Mg-Re is that alloy is not seen relevant bibliographical information at home and abroad at present, belongs to the Cu alloy material that a kind of novel high-strength highly-conductive has both.The introducing of Cr mainly is that it has certain solution strengthening effect to the copper matrix, and the content of working out Cr in this alloy is 0.10%～1.00%; The introducing of Zr mainly is the significant ageing strengthening of considering that it had, the too high electroconductibility that will reduce alloy greatly of Zr content, and that content is crossed low its strengthening effect that is had is not remarkable, working out Zr in this alloy is 0.05%～0.50%; The adding of Mg element is suitable with the Zr element interaction, can improve type, size and the distribution of precipitated phase, further improves dispersion-strengthened effect, and its add-on is 0%～0.50%; Adding rare earth element (Ce and Y) mainly has been to purify the crystalline effect, and its add-on should be controlled at below 0.20%.The key character of this alloy is the high-strength and high property of leading taken into account that it has, and also has excellent high thermal resistance and abrasion resistance properties etc. simultaneously.
Two rollers that the present invention adopts revolve that to cast quench be the metal fluid column to be ejected between two cooling rollers that do relative motion of high speed rotating be able to quick cooling, and its speed of cooling can reach 10
5～10
6K/s equally by control process parameters, can obtain the crystallite strip of basic non-oxidation under atmospheric environment.Adopt two rollers to revolve the thin band of copper alloy of casting quench preparation, the intensity of alloy and hardness are lower than single roller and revolve the casting quench after the ageing treatment, but still have better comprehensive performance.Revolve the Cu-0.58Cr-0.10Zr-0.05Mg alloy thin band of casting quench preparation as two rollers, through 550 ℃ of timeliness 0.5 hour, its electric conductivity was that 81%IACS, microhardness can reach HV195.And, make the thin band of copper alloy that adopts this kind method to prepare have more wide application prospect owing to can obtain to prepare thicker alloy thin band (＞150 μ m) than adopting single roller to revolve the casting quench.
Have the advantages that according to the prepared copper alloy of manufacturing process of the present invention high strength and high conductivity are taken into account, it has overcome other copper alloy high strength and the conflicting defective of high conduction, its intensity can reach more than 550～600MPa, specific conductivity still can remain on more than the 80%IACS, improve 3～5 times than conventional copper alloy its work-ing life, and have good softening resistance energy, high hot strength and plasticity, softening temperature reaches more than 550 ℃; At the reduced rate of 300 ℃ of following intensity less than 10%, unit elongation is more than 5%, also have performances such as excellent high thermal resistance and abrasion resistance properties simultaneously, can satisfy the requirement of all trades and professions, for the production of copper alloy has improved quality product and productivity the copper alloy high-strength highly-conductive.Technology of the present invention rationally, simply can guarantee quality product.
Description of drawings
Fig. 1 revolves casting quenching apparatus structural representation for the two rollers of the present invention.
Fig. 2 is the structural representation of melting appartus of the present invention.
Among the figure: 1. exchange slip electric motor, 2. power supply, 3. thermatron, 4. inductor block well heater, 5. alloy melt, 6. argon gas, 7. quartz, 8. copper roller, 9. roller axle, 10. conduction hole.
Embodiment
Embodiment 1
The composition of the described thin band of copper alloy of present embodiment is: Cr 0.15wt%; Zr 0.06%; Mg 0.10wt%; (Ce+Y), be controlled at below 0.20%, surplus is Cu.
The processing method that present embodiment prepares thin band of copper alloy comprises:
(1) melting of mother alloy;
(2) two roller spray band quench are produced alloy;
(3) solid solution of alloy, solid solution after strain and ageing treatment.
The melting of described mother alloy is carried out in ZXG-400 type direct current vacuum arc fumace.In forvacuum and applying argon gas 〉=4.6 * 10
4Behind the Pa, the beginning arc melting.For making the mother alloy composition even as far as possible, melt back 5 times, each 10min.Make " button " shape mother alloy of φ 20mm.
What described pair of roller spray band quench adopted is that two rollers revolve the casting quenching apparatus.In conjunction with shown in Figure 2, two φ 200mm copper rollers 8 in this device do relative motion by exchanging slip electric motor 1 drive as Fig. 1; Rotating speed of motor is 125～1250rpm, and after speed ratio was 1: 2.6 gear pair speedup, the maximum speed of copper roller 8 can reach 3250rpm; A roller center in two copper rollers 8 is fixed, and another roller axle connects spring to be made it to keep in touch or keep a determining deviation with the center fixation roller; Can adjust two roller spacings under a certain fixed constraint power, when two roll gap pressures were greater than restraint force when work, two rollers can separate automatically, the defective copper roller surface in case gap location deposit solution is too much.Its working process is: by power supply 2, thermatron 3 and the high-frequency induction heating apparatus that inductor block heater heats device 4 is formed the alloy melting in the silica tube 7 is become alloy melt 5; under the argon shield with pressure P and exerting pressure; by conduction hole 10 streams alloy melt 5 is ejected between two rollers 8; drive roller axle 9 and copper roller 8 rotation chillings through exchanging slip electric motor 1, can make alloy thin band.
The rotating speed of these two cooling rollers is 2000rpm; Spraying pressure is 0.7MPa; Nozzle diameter is 0.6mm; Nozzle is 20mm from two roller spacings; Restraint force is 60N between roller.
The solution treatment of described alloy is to handle in chamber type electric resistance furnace, and its temperature is 870 ℃, and soaking time is 1h, carries out shrend after the solution treatment.Distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control.Then carry out ageing treatment in being connected with the electric tube furnace of nitrogen protection, temperature-controlled precision is ± 2 ℃, and aging temp is 460 ℃, and soaking time is 2.5h, air cooling.
The composition of the described thin band of copper alloy of present embodiment is: Cr 0.42wt%; Zr 0.25%; Mg 0.15wt%; (Ce+Y) be controlled at below 0.20%, surplus is Cu.
The proportioning of described mishmetal (Ce+Y) is: the processing method that the W present embodiment prepares thin band of copper alloy comprises:
(1) melting of mother alloy;
(2) two roller spray band quench are produced alloy;
(3) solid solution of alloy, solid solution after strain and ageing treatment.
The melting of described mother alloy is carried out in ZXG-400 type direct current vacuum arc fumace.In forvacuum and applying argon gas 〉=4.6 * 10
4Behind the Pa, the beginning arc melting.For making the mother alloy composition even as far as possible, melt back 5 times, each 10min.Make " button " shape mother alloy of φ 20mm.
Two rollers that described pair of roller spray band quench adopts revolve its structure formation of casting quenching apparatus and working process with embodiment 1, and wherein the rotating speed of two cooling rollers is 2200rpm; Spraying pressure is 0.75MPa; Nozzle diameter is 1.0mm; Nozzle is 20mm from two roller spacings; Restraint force is 70N between roller.
The solution treatment of described alloy is to handle in chamber type electric resistance furnace, and its temperature is 920 ℃, and soaking time is 1h, carries out shrend after the solution treatment.Distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control.Then carry out ageing treatment in being connected with the electric tube furnace of nitrogen protection, temperature-controlled precision is ± 2 ℃, and aging temp is 480 ℃, and soaking time is 2h, air cooling.
The composition of the described thin band of copper alloy of present embodiment is: Cr 0.88wt%; Zr 0.42%; Mg 0.20wt%; (Ce+Y), be controlled at below 0.20%, surplus is Cu.
The processing method that present embodiment prepares thin band of copper alloy comprises:
(1) melting of mother alloy;
(2) two roller spray band quench are produced alloy;
(3) solid solution of alloy, solid solution after strain and ageing treatment.
The melting of described mother alloy is carried out in ZXG-400 type direct current vacuum arc fumace.In forvacuum and applying argon gas 〉=4.6 * 10
4Behind the Pa, the beginning arc melting.For making the mother alloy composition even as far as possible, melt back 5 times, each 10min.Make " button " shape mother alloy of φ 20mm.
Two rollers that described pair of roller spray band quench adopts revolve its structure formation of casting quenching apparatus and working process with embodiment 1, and wherein the rotating speed of two cooling rollers is 2500rpm; Spraying pressure is 0.90MPa; Nozzle diameter is 0.8mm; Nozzle is 20mm from two roller spacings; Restraint force is 90N between roller.
The solution treatment of described alloy is to handle in chamber type electric resistance furnace, and its temperature is 960 ℃, and soaking time is 1h, carries out shrend after the solution treatment.Distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control.Then carry out ageing treatment in being connected with the electric tube furnace of nitrogen protection, temperature-controlled precision is ± 2 ℃, and aging temp is 490 ℃, and soaking time is 1h, air cooling.
Claims (7)
1, a kind of thin band of copper alloy that possesses high strength and high conduction performance is characterized in that: described thin band of copper alloy contains Cu, Cr, Zr, Mg and mishmetal (Ce+Y), and wherein the content of each composition is: Cr 0.05%～1.00wt%; Zr 0.05%～0.50%; Mg 0.05～0.20wt%; Mishmetal (Ce+Y)≤0.20%; Surplus is Cu.
2, a kind of preparation technology who prepares the described thin band of copper alloy of claim 1, it is characterized in that: its processing method comprises:
The melting of mother alloy: its smelting temperature is 1200～1400 ℃;
Two roller spray band quench are produced alloy: the rotating speed of two cooling rollers of setting is 2000～2800rpm; Spraying pressure is 0.5～1.0MPa; Nozzle diameter is 0.5～1.0mm; Nozzle is 15～25mm from two roller spacings; Restraint force is 60～100N between roller;
The solid solution of alloy, solid solution after strain and ageing treatment: the solid solution temperature of described alloy is 850～960 ℃, and soaking time is 1h; Described ageing treatment temperature-controlled precision is ± 2 ℃, and aging temp is 440～520 ℃, and soaking time is 0.5～4h, air cooling.
3, the thin band of copper alloy that possesses high strength and high conduction performance according to claim 1 is characterized in that: the proportioning of described mishmetal (Ce+Y) is: Wt%Ce: Wt%Y=1: 1.
4, the preparation technology of thin band of copper alloy according to claim 2 is characterized in that: the melting of described mother alloy is carried out in ZXG-400 type direct current vacuum arc fumace, melt back 5 times, each 10min.
5, the preparation technology of thin band of copper alloy according to claim 2 is characterized in that: the distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control.
6, the preparation technology of thin band of copper alloy according to claim 2 is characterized in that: the distortion after the described solid solution is meant that alloy carries out on the small-sized strip milling train of self-control.
7; the preparation technology of thin band of copper alloy according to claim 2; it is characterized in that: described pair of roller spray band quench is by power supply (2); thermatron (3) becomes alloy melt (5) with the high-frequency induction heating apparatus that inductor block heater heats device (4) is formed with the alloy melting in the silica tube (7); under the argon shield with pressure P and exerting pressure; by conduction hole (10) stream alloy melt (5) is ejected between two rollers (8); through exchanging copper roller (8) the rotation chilling that slip electric motor (1) drives roller axle (9) and two move toward one another, can make alloy thin band.
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