CN110527866A - A kind of highly conductive high-strength copper band and preparation method thereof - Google Patents
A kind of highly conductive high-strength copper band and preparation method thereof Download PDFInfo
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- CN110527866A CN110527866A CN201910934877.0A CN201910934877A CN110527866A CN 110527866 A CN110527866 A CN 110527866A CN 201910934877 A CN201910934877 A CN 201910934877A CN 110527866 A CN110527866 A CN 110527866A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22F1/08—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 present invention relates to copper strips technical fields, more particularly to a kind of highly conductive high-strength copper band and preparation method thereof, by weight, including following percent composition: Cu95-96%, Cr1-2%, Zn0.3-0.5%, Zr0.5-1%, B0.7-1.5%, remaining is inevitable impurity to copper strips.The Zr that the present invention is added can enhance the intensity of copper strips by precipitation strength, and by annealing with after ageing treatment, the disperse phase and parent phase of precipitation keep symbiosis and epibiosis, maintain the high conductivity of copper strips while improving copper strips intensity as far as possible；And the Cr and Zn that the present invention is added can be solid-solution in Cu, and the intensity of copper strips is improved by solution strengthening, can effectively be hindered dislocation motion, be improved the ductility of copper strips；In addition, the addition of B element of the present invention can make crystal grain refinement, increase grain boundary area, to improve alloy strength.
Description
Technical field
The present invention relates to copper strips technical fields, and in particular to a kind of highly conductive high-strength copper band and preparation method thereof.
Background technique
Copper strips is a kind of hardware, mainly for the production of electric elements, lamp cap, battery cap, button, sealing element, is patched
Part, such as electric components, switch, washer, gasket, electron tube, radiator, conductive base material and radiator, cooling fin, gas
The various components such as cylinder piece.
In recent years, with the rapid development of electronics industry, the requirement for the intensity and electric conductivity of copper strips is higher and higher, such as
The intensity and electric conductivity what improves copper strips become one of the hot spot researched and developed.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of highly conductive high-strength
Spend copper strips and preparation method thereof.
The purpose of the invention is achieved by the following technical solution:
A kind of highly conductive high-strength copper band, by weight, including following percent composition:
Remaining is inevitable impurity.
The Zr that the present invention is added can enhance the intensity of copper strips by precipitation strength, and by annealing and ageing treatment
Afterwards, the disperse phase of precipitation and parent phase keep symbiosis and epibiosis, maintain the high conductivity of copper strips while improving copper strips intensity as far as possible；
And the Cr and Zn that the present invention is added can be solid-solution in Cu, and the intensity of copper strips is improved by solution strengthening, can effectively hinder position
Wrong Shipment is dynamic, improves the ductility of copper strips, but solution strengthening is affected to conductivity, need to annealing and ageing treatment into
Row suitable control；In addition, the addition of B element of the present invention can make crystal grain refinement, increase grain boundary area, to improve alloy strength.
Including following percent composition preferably, by weight:
Remaining is inevitable impurity.
Including following percent composition preferably, by weight:
Remaining is inevitable impurity.
Preferably, inevitable impurity is not more than 0.03%.
As above, the preparation method of a kind of highly conductive high-strength copper band, includes the following steps:
(1) melting: weigh by weight ratio Cu, Cu-Cr intermediate alloy, Cu-Zn intermediate alloy, Cu-Zr intermediate alloy and
B carries out melting under nitrogen atmosphere, obtains aluminium alloy；
(2) it casts: aluminium alloy is poured into progress cast molding in cast device, obtain thick band embryo；
(3) hot rolling: then thick band embryo is placed in equipment of hot rolling slightly with the oxide skin of embryo surface and carries out hot rolling by removal, makes
Obtain hot-rolled strip embryo；
(4) it anneals: hot-rolled strip embryo being made annealing treatment, annealing zone embryo is obtained；
(5) cold rolling: hot-rolled strip embryo is subjected to cold rolling, trimming, cold-rolled strip embryo is made；
(6) cold-rolled strip embryo ageing treatment: is subjected to ageing treatment to get the copper strips is arrived.
The preparation method of copper strips of the present invention is simple, and the use of intermediate alloy can reduce smelting temperature, shortens smelting time,
Improve the stability and uniformity of alloy；As-cast structure can be eliminated by annealing, crystal grain is refined, reduces the orientation of copper strips
Property, improve the intensity and electric conductivity of copper strips；The energy storage and dislocation of alloy after deformation can be effectively reduced by ageing treatment,
Improve the mechanical performance and electric conductivity of copper strips.
Wherein, the smelting temperature of the step (1) is 1200-1300 DEG C.The present invention can be changed by controlling smelting temperature
The dispersing uniformity of kind alloying component, reduces the generation of fault of construction, improves the intensity of alloy.
Wherein, in the step (3), the temperature of hot rolling is 950-1050 DEG C, hot-rolled strip embryo with a thickness of 3-4mm.Pass through
The coarse grain of as-cast condition can be crushed by hot rolling, reduce or eliminate casting flaw, and as-cast structure is changed into Deformation structure,
Improve the processing performance of alloy.
Wherein, in the step (4), the temperature of annealing is 600-700 DEG C, soaking time 2-3h, then natural in furnace
It is cooling.By the technological parameter of control annealing, crystal grain can be further refined, eliminates stress, conducive to the progress of solid solution process, is mentioned
The intensity and electric conductivity of high alloy.
Wherein, in the step (5), cold-rolled strip embryo with a thickness of 0.4-0.6mm.
Wherein, in the step (6), ageing treatment is interrupted aging processing, and the temperature of level-one ageing treatment is 250-350
DEG C, time 1-2h, the temperature of secondary time effect processing is 400-450 DEG C, time 2-4h.The present invention passes through control ageing treatment
Technological parameter, can eliminate the stress generated in cold-rolled process, refine crystal grain, improve the intensity and electric conductivity of alloy.
The beneficial effects of the present invention are: the Zr that the present invention is added can enhance the intensity of copper strips by precipitation strength, and
And through annealing and ageing treatment after, the disperse phase of precipitation and parent phase keep symbiosis and epibiosis, while improving copper strips intensity as far as possible
Maintain the high conductivity of copper strips；And the Cr and Zn that the present invention is added can be solid-solution in Cu, improve copper strips by solution strengthening
Intensity, can effectively hinder dislocation motion, improve the ductility of copper strips, but solution strengthening is affected to conductivity, need
Suitable control is carried out to annealing and ageing treatment；In addition, the addition of B element of the present invention can make crystal grain refinement, increase crystal boundary
Area, to improve alloy strength.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
A kind of highly conductive high-strength copper band, by weight, including following percent composition:
Remaining is inevitable impurity.
As above, the preparation method of a kind of highly conductive high-strength copper band, includes the following steps:
(1) melting: weigh by weight ratio Cu, Cu-Cr intermediate alloy, Cu-Zn intermediate alloy, Cu-Zr intermediate alloy and
B carries out melting under nitrogen atmosphere, obtains aluminium alloy；
(2) it casts: aluminium alloy is poured into progress cast molding in cast device, obtain thick band embryo；
(3) hot rolling: then thick band embryo is placed in equipment of hot rolling slightly with the oxide skin of embryo surface and carries out hot rolling by removal, makes
Obtain hot-rolled strip embryo；
(4) it anneals: hot-rolled strip embryo being made annealing treatment, annealing zone embryo is obtained；
(5) cold rolling: hot-rolled strip embryo is subjected to cold rolling, trimming, cold-rolled strip embryo is made；
(6) cold-rolled strip embryo ageing treatment: is subjected to ageing treatment to get the copper strips is arrived.
Wherein, the smelting temperature of the step (1) is 1200 DEG C.
Wherein, in the step (3), the temperature of hot rolling is 950 DEG C, hot-rolled strip embryo with a thickness of 3mm.
Wherein, in the step (4), the temperature of annealing is 600 DEG C, soaking time 3h, then natural cooling in furnace.
Wherein, in the step (5), cold-rolled strip embryo with a thickness of 0.4mm.
Wherein, in the step (6), ageing treatment is interrupted aging processing, and the temperature of level-one ageing treatment is 250 DEG C,
Time is 2h, and the temperature of secondary time effect processing is 400 DEG C, time 2h.
Embodiment 2
A kind of highly conductive high-strength copper band, by weight, including following percent composition:
Remaining is inevitable impurity.
As above, the preparation method of a kind of highly conductive high-strength copper band, includes the following steps:
(1) melting: weigh by weight ratio Cu, Cu-Cr intermediate alloy, Cu-Zn intermediate alloy, Cu-Zr intermediate alloy and
B carries out melting under nitrogen atmosphere, obtains aluminium alloy；
(2) it casts: aluminium alloy is poured into progress cast molding in cast device, obtain thick band embryo；
(3) hot rolling: then thick band embryo is placed in equipment of hot rolling slightly with the oxide skin of embryo surface and carries out hot rolling by removal, makes
Obtain hot-rolled strip embryo；
(4) it anneals: hot-rolled strip embryo being made annealing treatment, annealing zone embryo is obtained；
(5) cold rolling: hot-rolled strip embryo is subjected to cold rolling, trimming, cold-rolled strip embryo is made；
(6) cold-rolled strip embryo ageing treatment: is subjected to ageing treatment to get the copper strips is arrived.
Wherein, the smelting temperature of the step (1) is 1300 DEG C.
Wherein, in the step (3), the temperature of hot rolling is 1050 DEG C, hot-rolled strip embryo with a thickness of 4mm.
Wherein, in the step (4), the temperature of annealing is 700 DEG C, soaking time 2h, then natural cooling in furnace.
Wherein, in the step (5), cold-rolled strip embryo with a thickness of 0.6mm.
Wherein, in the step (6), ageing treatment is interrupted aging processing, and the temperature of level-one ageing treatment is 350 DEG C,
Time is 1h, and the temperature of secondary time effect processing is 450 DEG C, time 2h.
Embodiment 3
A kind of highly conductive high-strength copper band, by weight, including following percent composition:
Remaining is inevitable impurity.
As above, the preparation method of a kind of highly conductive high-strength copper band, includes the following steps:
(1) melting: weigh by weight ratio Cu, Cu-Cr intermediate alloy, Cu-Zn intermediate alloy, Cu-Zr intermediate alloy and
B carries out melting under nitrogen atmosphere, obtains aluminium alloy；
(2) it casts: aluminium alloy is poured into progress cast molding in cast device, obtain thick band embryo；
(3) hot rolling: then thick band embryo is placed in equipment of hot rolling slightly with the oxide skin of embryo surface and carries out hot rolling by removal, makes
Obtain hot-rolled strip embryo；
(4) it anneals: hot-rolled strip embryo being made annealing treatment, annealing zone embryo is obtained；
(5) cold rolling: hot-rolled strip embryo is subjected to cold rolling, trimming, cold-rolled strip embryo is made；
(6) cold-rolled strip embryo ageing treatment: is subjected to ageing treatment to get the copper strips is arrived.
Wherein, the smelting temperature of the step (1) is 1250 DEG C.
Wherein, in the step (3), the temperature of hot rolling is 1000 DEG C, hot-rolled strip embryo with a thickness of 3.5mm.
Wherein, in the step (4), the temperature of annealing is 650 DEG C, soaking time 2.5h, then natural cooling in furnace.
Wherein, in the step (5), cold-rolled strip embryo with a thickness of 0.5mm.
Wherein, in the step (6), ageing treatment is interrupted aging processing, and the temperature of level-one ageing treatment is 300 DEG C,
Time is 1.5h, and the temperature of secondary time effect processing is 425 DEG C, time 3h.
Comparative example 1
The difference of this comparative example and embodiment 3 is:
The copper strips is made of the element of following degree:
Remaining is inevitable impurity.
Comparative example 2
The difference of this comparative example and embodiment 3 is:
Remaining is inevitable impurity.
Comparative example 3
The difference of this comparative example and embodiment 3 is:
Remaining is inevitable impurity.
Comparative example 4
The difference of this comparative example and embodiment 3 is:
Remaining is inevitable impurity.
The copper strips of embodiment 3 and comparative example 1-4 are subjected to tension according to quasi- GB/T228.1, GB/T4340.1 and GB/T351
The test of intensity, hardness and conductivity, test result is as follows table:
| Tensile strength (MPa) | Hardness (HV) | Conductivity (IACS) | |
| Embodiment 3 | 271 | 83 | 90.4 |
| Comparative example 1 | 279 | 92 | 83.3 |
| Comparative example 2 | 262 | 77 | 82.4 |
| Comparative example 3 | 253 | 72 | 87.6 |
| Comparative example 4 | 268 | 79 | 85.8 |
From the comparison of embodiment 3 and comparative example 1 it is found that when the basic crack of Cu is identical, copper strips can be improved with Cr substitution B
Intensity, but also drastically reduced electric conductivity；From embodiment 3 and the comparison of comparative example 2 it is found that with Zn substitution B for copper strips
Electric conductivity be affected, intensity also decrease to some degree；From the comparison of embodiment 3 and comparative example 3 it is found that with
The intensity that Zr substitution B will cause copper strips is decreased obviously, but electric conductivity relative contrast example 1 and comparative example 2 are higher；From embodiment 3
It is found that substituting B in certain proportion with Cr, Zn and Zr, the decline of mechanical property is substantially unobvious, leads for comparison with comparative example 4
Electrical property still has a degree of decline.In conclusion the addition of the addition of B element opposite Cr, Zn and Zr, are effectively to change
The mechanical property and electric conductivity of kind copper strips are especially that other threes are irreplaceable improving the effect of electric conductivity.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way, In
Do not depart under the premise of present inventive concept it is any obviously replace it is within the scope of the present invention.
Claims (10)
1. a kind of highly conductive high-strength copper band, it is characterised in that: by weight, including following percent composition:
Remaining is inevitable impurity.
2. a kind of highly conductive high-strength copper band according to claim 1, it is characterised in that: by weight, including following hundred
Divide than ingredient:
Remaining is inevitable impurity.
3. a kind of highly conductive high-strength copper band according to claim 1, it is characterised in that: by weight, including following hundred
Divide than ingredient:
Remaining is inevitable impurity.
4. a kind of highly conductive high-strength copper band according to claim 1, it is characterised in that: inevitable impurity is not more than
0.03%.
5. a kind of preparation method of highly conductive high-strength copper band described in claim 1-4 any one, it is characterised in that: including
Following steps:
(1) melting: Cu, Cu-Cr intermediate alloy, Cu-Zn intermediate alloy, Cu-Zr intermediate alloy and B, In are weighed by weight ratio
Melting is carried out under nitrogen atmosphere, obtains aluminium alloy；
(2) it casts: aluminium alloy is poured into progress cast molding in cast device, obtain thick band embryo；
(3) hot rolling: then thick band embryo is placed in equipment of hot rolling slightly with the oxide skin of embryo surface and carries out hot rolling by removal, and heat is made
Roll band embryo；
(4) it anneals: hot-rolled strip embryo being made annealing treatment, annealing zone embryo is obtained；
(5) cold rolling: hot-rolled strip embryo is subjected to cold rolling, trimming, cold-rolled strip embryo is made；
(6) cold-rolled strip embryo ageing treatment: is subjected to ageing treatment to get the copper strips is arrived.
6. a kind of preparation method of highly conductive high-strength copper band according to claim 5, it is characterised in that: the step
(1) smelting temperature is 1200-1300 DEG C.
7. a kind of preparation method of highly conductive high-strength copper band according to claim 5, it is characterised in that: the step
(3) in, the temperature of hot rolling is 950-1050 DEG C, hot-rolled strip embryo with a thickness of 3-4mm.
8. a kind of preparation method of highly conductive high-strength copper band according to claim 5, it is characterised in that: the step
(4) in, the temperature of annealing is 600-700 DEG C, soaking time 2-3h, then natural cooling in furnace.
9. a kind of preparation method of highly conductive high-strength copper band according to claim 5, it is characterised in that: the step
(5) in, cold-rolled strip embryo with a thickness of 0.4-0.6mm.
10. a kind of preparation method of highly conductive high-strength copper band according to claim 5, it is characterised in that: the step
(6) in, ageing treatment is interrupted aging processing, and the temperature of level-one ageing treatment is 250-350 DEG C, time 1-2h, when second level
The temperature of effect processing is 400-450 DEG C, time 2-4h.
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