CN117403095A - Copper alloy material containing rare earth Y and preparation method thereof - Google Patents
Copper alloy material containing rare earth Y and preparation method thereof Download PDFInfo
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- CN117403095A CN117403095A CN202311521062.2A CN202311521062A CN117403095A CN 117403095 A CN117403095 A CN 117403095A CN 202311521062 A CN202311521062 A CN 202311521062A CN 117403095 A CN117403095 A CN 117403095A
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 74
- 239000000956 alloy Substances 0.000 title claims abstract description 71
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 41
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 21
- 238000000137 annealing Methods 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 9
- 238000005098 hot rolling Methods 0.000 claims abstract description 9
- 238000003801 milling Methods 0.000 claims abstract description 9
- 229910017827 Cu—Fe Inorganic materials 0.000 claims abstract description 8
- 229910017888 Cu—P Inorganic materials 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 8
- 239000000155 melt Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 229910002530 Cu-Y Inorganic materials 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 6
- 238000005728 strengthening Methods 0.000 abstract description 16
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 229910017824 Cu—Fe—P Inorganic materials 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000008207 working material 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
- C22C9/00—Alloys based on copper
-
- 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
-
- 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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- 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)
- Conductive Materials (AREA)
Abstract
The invention discloses a copper alloy material containing rare earth Y and a preparation method thereof, belonging to the technical field of copper alloy. The rare earth Y-containing copper alloy material comprises the following components in percentage by mass: fe:0.5 to 0.6 percent; p:0.2 to 0.3 percent; y:0.05 to 0.2 percent; the balance being Cu and unavoidable impurities. The preparation method comprises the following steps: s1, smelting Cu-Fe and Cu-P, cu-Y intermediate alloy at 1100-1300 ℃ and under the atmospheric pressure of less than 0.1 Pa; s2, uniformly stirring the melt, and casting to obtain a copper alloy cast ingot; and S3, sequentially homogenizing, hot rolling, milling surfaces, cold rough rolling, intermediate annealing, cold finish rolling and aging treatment are carried out on the cast ingot, and the cast ingot is obtained. The copper alloy material contains rare earth Y element, can be combined with Cu to form a strengthening phase and is combined with Fe 2 P and Fe 3 P forms a composite strengthening phase, strengthened by fine grains andtwo phases are strengthened so as to obtain high strength and high conductivity at the same time.
Description
Technical Field
The invention relates to the technical field of copper alloy, in particular to a copper alloy material containing rare earth Y and a preparation method thereof.
Background
Copper alloy is widely used as a conventional nonferrous metal working material in various fields such as resistance welding electrode, motor winding wire, cable, switching device, electric contact element, integrated circuit lead frame, high speed railway rail contact line, etc. because of its excellent electrical conductivity, good thermal conductivity, ductility and high strength. In recent decades, with the continuous development of industry, technology is gradually improved, and higher requirements are also put on various properties of materials. For example: lead frames, which are chip carriers for integrated circuits, have a great influence on the durability and reliability of the circuits, and thus are required to have excellent electrical conductivity and tensile strength. Wherein the Cu-Fe-P copper alloy is widely applied integrated circuit lead frame material, such as high-conductivity Cu-Fe-P alloy with typical mark of C19210 and the like, which consists of about 99 percent copper element, and the precipitation strengthening phase is mainly Fe 2 P and Fe 3 P, the strengthening phase improves the strength of the copper alloy. The conductivity of the C19210 alloy is 80% IACS, but the tensile strength is only about 400 MPa; and C19400 alloy conductivityMore than 60 percent IACS and the tensile strength reaches 450 to 600MPa. Under the development trend of miniaturization, thinning and light weight, the strength requirement on the copper alloy material is higher and higher, so that the requirement of the current miniaturization component is met by improving the conductivity and the tensile strength of the Cu-Fe-P copper alloy at the same time.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a copper alloy material containing rare earth Y, wherein the copper alloy material contains rare earth Y element, can be combined with Cu to form a strengthening phase, and enables a Cu-Fe-P copper alloy to obtain high strength and high conductivity simultaneously through fine grain strengthening and second phase strengthening.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the copper alloy material containing rare earth Y comprises the following components in percentage by mass: fe:0.5 to 0.6 percent; p:0.2 to 0.3 percent; y:0.05 to 0.2 percent; the balance being Cu and unavoidable impurities.
As a preferred embodiment of the present invention, the rare earth Y-containing copper alloy material comprises the following components in mass percent: fe:0.56%; p:0.3%; y:0.12%; the balance being Cu.
The second object of the present invention is to provide a method for preparing the copper alloy material containing rare earth Y as described above, comprising the steps of:
s1, proportioning Cu-Fe and Cu-P, cu-Y intermediate alloy according to the mass percentage of each component, and smelting at 1100-1300 ℃ and under the atmospheric pressure of less than 0.1 Pa;
s2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
and S3, sequentially carrying out homogenization, hot rolling, surface milling, cold rough rolling, intermediate annealing, cold finish rolling and aging treatment on the cast ingot to obtain the copper alloy material.
As a preferred embodiment of the present invention, the cu—y master alloy is a powder having a particle size of less than 50 μm; the Cu-Y intermediate alloy is coated by pure copper foil and is sealed by filling argon.
As a preferred embodiment of the present invention, the homogenization conditions are: homogenizing annealing and preserving heat for 4-6 h at 920-950 ℃.
As a preferred embodiment of the invention, hot rolling is carried out at 700-920 ℃ to 14-15 mm, milling is carried out at 0.4-0.6 mm, and then cold rough rolling is carried out to 0.8-1.0 mm thick; finish cold rolling to a thickness of 0.3-0.5 mm; the reduction rate of the cold rough rolling and the cold finish rolling is 60-95%.
As a preferred embodiment of the present invention, the condition of the intermediate annealing is annealing at 460.+ -. 10 ℃ for 8-10 hours.
As a preferred embodiment of the invention, the aging treatment is carried out under the condition of heat preservation for 6-10 hours at 520+/-10 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the copper alloy material, the rare earth Y is added into the Cu-Fe-P copper alloy, so that the rare earth Y not only has the effect of refining grains, but also has the purifying effects of deoxidization and desulfurization, and the conductivity of the copper alloy is improved to a certain extent; in addition, since rare earth Y has extremely low solid solubility in Cu, rare earth Y forms Cu with Cu 6 Y intermetallic compound, Y combines with O in the melt to form certain Y 2 O 3 Forming a dispersion strengthening phase in situ in a copper matrix, and forming an oxide of rare earth Y and a conventional second phase Fe in a Cu-Fe-P copper alloy 2 P and Fe 3 P forms a composite strengthening phase, and in addition, a small amount of Fe-Y intermediate phase exists, and the fine second phase particles can pin or block dislocation movement, so that the strengthening effect is achieved. In summary, the rare earth element Y is added, so that the copper alloy can not only play a role in purification, but also be combined with Cu to form a strengthening phase, and the prepared copper alloy can simultaneously obtain high tensile strength and high conductivity through fine crystal strengthening and second phase strengthening.
According to the preparation method, the Cu-Y rare earth intermediate alloy is fully dissolved and uniformly mixed with the Cu-Fe and Cu-P intermediate alloy melt, so that fine-grain strengthening and second-phase strengthening are obtained; rough rolling and finish rolling are carried out by adopting a cold rolling reduction rate of 60% -95%, so as to ensure grain refinement after annealing; aging after cold rolling can allow Fe to be 2 P and Fe 3 The P strengthening phase is fully separated out, and the purification effect of the rare earth Y is added, so that the tensile strength and the conductivity are greatly improved, and the prepared copper alloy finished product has the tensile strength of more than 500MPa and the conductivity of more than 82 percent IACS.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The copper alloy material containing rare earth Y consists of the following components in percentage by mass: fe:0.5 to 0.6 percent; p:0.2 to 0.3 percent; y:0.05 to 0.2 percent; the balance being Cu and unavoidable impurities.
The preparation method of the copper alloy material containing the rare earth Y comprises the following steps:
s1, proportioning Cu-Fe and Cu-P, cu-Y intermediate alloy according to the mass percentage of each component, and smelting at 1100-1300 ℃ and under the atmospheric pressure of less than 0.1 Pa; wherein the Cu-Y intermediate alloy is powder with the grain diameter smaller than 50 mu m, and the Cu-Y intermediate alloy powder is coated by pure copper foil and is sealed by filling argon. In the invention, the powdery Cu-Y intermediate alloy plays a role of a grain refiner in smelting, and can increase nucleation rate in the solidification process, thereby refining casting tissues; the grain diameter of the Cu-Y intermediate alloy powder is smaller than 50 mu m, so that the Cu-Y intermediate alloy powder can be conveniently and fully melted and uniformly mixed; the adoption of pure copper foil cladding and argon filling sealing can reduce the burning loss of the rare earth intermediate alloy, ensure the rare earth yield, and avoid directly adding rare earth elements to ensure that the burning loss is larger and the yield is lower in the smelting process.
S2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
s3, carrying out homogenizing annealing and heat preservation on the cast ingot for 4-6 hours at 920-950 ℃, carrying out hot rolling to 14-15 mm at 700-920 ℃, carrying out cold rough rolling to 0.8-1.0 mm thick after milling the surface for 0.4-0.6 mm, carrying out intermediate annealing for 8-10 hours at 460+10 ℃, carrying out cold finish rolling to 0.3-0.5 mm thick, and carrying out heat preservation for 6-10 hours at 520+/-10 ℃ for aging treatment, thus obtaining the copper alloy material.
Example 1:
the copper alloy material containing the rare earth Y comprises the following components in percentage by mass: fe:0.52%; p:0.1%; y:0.05%; the balance being Cu.
The preparation method of the copper alloy material containing the rare earth Y comprises the following steps:
s1, grinding a Cu-Y intermediate alloy into powder with the particle size smaller than 50 mu m, cladding by adopting a pure copper foil, and sealing by filling argon gas; the Cu-Fe and Cu-P, cu-Y intermediate alloy is proportioned according to the mass percentage of each component, and is smelted at 1100-1300 ℃ and the atmospheric pressure lower than 0.1 Pa.
S2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
s3, carrying out homogenizing annealing and heat preservation on the cast ingot at 920 ℃ for 6 hours, carrying out hot rolling at 700-920 ℃ to 14mm, carrying out cold rough rolling at 0.4mm after milling the surface to 0.8mm thick, carrying out intermediate annealing at 450 ℃ for 8 hours, carrying out cold finish rolling to 0.3mm thick, and carrying out heat preservation at 510 ℃ for 6 hours by aging treatment to obtain the final copper alloy plate strip.
The finished product of this example was measured to have a tensile strength of 522MPa and an electrical conductivity of 82% IACS.
Example 2:
the copper alloy material containing the rare earth Y comprises the following components in percentage by mass: fe:0.56%; p:0.30%; y:0.12%; the balance being Cu.
The preparation method of the copper alloy material containing the rare earth Y comprises the following steps:
s1, grinding a Cu-Y intermediate alloy into powder with the particle size smaller than 50 mu m, cladding by adopting a pure copper foil, and sealing by filling argon gas; the Cu-Fe and Cu-P, cu-Y intermediate alloy is proportioned according to the mass percentage of each component, and is smelted at 1100-1300 ℃ and the atmospheric pressure lower than 0.1 Pa.
S2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
s3, carrying out homogenizing annealing and heat preservation on the cast ingot for 5 hours at 930 ℃, carrying out hot rolling at 700-920 ℃ to 14.5mm, carrying out cold rough rolling to 0.9mm thick after milling a surface for 0.5mm, carrying out intermediate annealing at 460 ℃ for 9 hours, carrying out cold finish rolling to 0.4mm thick, and carrying out heat preservation at 520 ℃ for 8 hours by aging treatment to obtain the final copper alloy plate strip.
The finished product of this example was found to have a tensile strength of 516MPa and an electrical conductivity of 84% IACS.
Example 3:
the copper alloy material containing the rare earth Y comprises the following components in percentage by mass: fe:0.59%; p:0.24%; y:0.20%; the balance being Cu.
The preparation method of the copper alloy material containing the rare earth Y comprises the following steps:
s1, grinding a Cu-Y intermediate alloy into powder with the particle size smaller than 50 mu m, cladding by adopting a pure copper foil, and sealing by filling argon gas; the Cu-Fe and Cu-P, cu-Y intermediate alloy is proportioned according to the mass percentage of each component, and is smelted at 1100-1300 ℃ and the atmospheric pressure lower than 0.1 Pa.
S2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
s3, carrying out homogenizing annealing and heat preservation on the cast ingot for 4 hours at 950 ℃, carrying out hot rolling at 700-920 ℃ until the thickness is 15mm, carrying out cold rough rolling until the thickness is 1.0mm after milling the surface by 0.6mm, carrying out intermediate annealing at 470 ℃ for 10 hours, carrying out cold finish rolling until the thickness is 0.5mm, and carrying out heat preservation at 530 ℃ for 10 hours by aging treatment to obtain the final copper alloy plate strip.
The finished product of this example was found to have a tensile strength of 505MPa and an electrical conductivity of 83% IACS.
Comparative example 1:
the copper alloy material consists of the following components in percentage by mass: fe:0.52%; p:0.1%; the balance being Cu. The preparation method of the copper alloy material adopts the preparation method of the embodiment 1 to prepare the copper alloy plate strip with the thickness of 0.3 mm.
The tensile strength of the finished product of this comparative example was 482MPa and the electrical conductivity was 81% IACS.
Comparative example 2:
the copper alloy material consists of the following components in percentage by mass: fe:0.56%; p:0.30%; the balance being Cu. The preparation method of the copper alloy material adopts the preparation method of the embodiment 2 to prepare the copper alloy plate strip with the thickness of 0.4 mm.
The tensile strength of the finished product of this comparative example was 490MPa and the conductivity was 80% IACS.
Comparative example 3:
the copper alloy material consists of the following components in percentage by mass: fe:0.59%; p:0.24%; the balance being Cu. The preparation method of the copper alloy material adopts the preparation method of the embodiment 3 to prepare the copper alloy plate strip with the thickness of 0.5 mm.
The finished product of this comparative example was found to have a tensile strength of 495MPa and an electrical conductivity of 79% IACS.
Comparative example 4:
the copper alloy material consists of the following components in percentage by mass: y:0.12%; the balance being Cu. The preparation method of the copper alloy material adopts the preparation method of the embodiment 2 to prepare the copper alloy plate strip with the thickness of 0.4 mm.
The finished product of this comparative example was found to have a tensile strength of 400MPa and a conductivity of 95% IACS.
As can be seen from the comparison, the copper alloy material containing rare earth Y prepared by the embodiments of the invention has higher tensile strength and excellent electric conductivity, wherein the tensile strength is up to 522Mpa, and the electric conductivity is up to 84% IACS; compared with the copper alloy materials prepared in comparative examples 1-4, the copper alloy material prepared by the alloy components provided by the invention has obvious advantages of tensile strength and performance, and has better electric conductivity than the copper alloy material prepared in comparative examples, which shows that the electric conductivity and tensile strength of the Cu-Fe-P copper alloy can be improved simultaneously by adding rare earth Y into the Cu-Fe-P copper alloy.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (8)
1. A copper alloy material containing rare earth Y is characterized in that: the components in percentage by mass are as follows: fe:0.5 to 0.6 percent; p:0.2 to 0.3 percent; y:0.05 to 0.2 percent; the balance being Cu and unavoidable impurities.
2. The rare earth Y-containing copper alloy material according to claim 1, wherein: the copper alloy material containing the rare earth Y comprises the following components in percentage by mass: fe:0.56%; p:0.3%; y:0.12%; the balance being Cu.
3. A method for producing the rare earth Y-containing copper alloy material according to claim 1 or 2, characterized in that: the method comprises the following steps:
s1, proportioning Cu-Fe and Cu-P, cu-Y intermediate alloy according to the mass percentage of each component, and smelting at 1100-1300 ℃ and under the atmospheric pressure of less than 0.1 Pa;
s2, uniformly stirring the melt obtained in the step S1, and casting to obtain a copper alloy cast ingot;
and S3, sequentially carrying out homogenization, hot rolling, surface milling, cold rough rolling, intermediate annealing, cold finish rolling and aging treatment on the cast ingot to obtain the copper alloy material.
4. The method for producing a rare earth Y-containing copper alloy material according to claim 3, wherein: the Cu-Y intermediate alloy is powder with the grain diameter smaller than 50 mu m; the Cu-Y intermediate alloy is coated by pure copper foil and is sealed by filling argon.
5. The method for producing a rare earth Y-containing copper alloy material according to claim 3, wherein: the homogenization conditions are as follows: homogenizing annealing and preserving heat for 4-6 h at 920-950 ℃.
6. The method for producing a rare earth Y-containing copper alloy material according to claim 3 or 5, characterized in that: finally hot rolling to 14-15 mm at 700-920 ℃, milling the surface to 0.4-0.6 mm, and then cold rough rolling to 0.8-1.0 mm thick; finish cold rolling to a thickness of 0.3-0.5 mm; the reduction rate of the cold rough rolling and the cold finish rolling is 60-95%.
7. The method for producing a rare earth Y-containing copper alloy material according to claim 6, wherein: the condition of the intermediate annealing is that the intermediate annealing is performed for 8-10 hours at 460+/-10 ℃.
8. The method for producing a rare earth Y-containing copper alloy material according to claim 6, wherein: the aging treatment is carried out under the condition of heat preservation for 6-10 hours at 520+/-10 ℃.
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| CN202311521062.2A CN117403095A (en) | 2023-11-15 | 2023-11-15 | Copper alloy material containing rare earth Y and preparation method thereof |
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