A high-strength and high-conductivity copper alloy material

Abstract

The present invention discloses a high-strength and high-conductivity copper alloy material. The raw materials for preparing the copper alloy material include liquid A and liquid B. Liquid A is prepared from raw materials including gadolinium oxide, copper acetate, chromium oxide, strontium oxide, and aqueous sulfuric acid solution; while liquid B is prepared from raw materials including copper acetate, ethanol, methanol, hydrazine, graphene nanosheets, and black phosphorus. The mass ratio of liquid A to liquid B is 1:2.8-3.2. The copper alloy material provided by the present invention, because its raw materials contain gadolinium oxide, graphene nanosheets, and black phosphorus, exhibits both high strength and high conductivity.

Description

Technical Field

[0001] The present invention relates to the field of alloy material preparation, and in particular to a high-strength and high-conductivity copper alloy material. Background Art

[0002] Copper and copper alloys have excellent properties such as good electrical conductivity, thermal conductivity, and corrosion resistance, and are therefore widely used in various industries, such as conductor materials for high-intensity magnetic fields, heat exchange materials, lead frame materials, contact wires, etc. With the development of high-tech industries, the comprehensive performance requirements for copper and copper alloys are becoming increasingly higher. High-strength and high-conductivity copper alloys are required to have both high strength and high conductivity. However, pure metals with high conductivity are generally very soft, such as copper, silver, and aluminum. The high strength and high conductivity of the copper alloys currently used are always in a trade-off, so how to balance the high strength and high conductivity of copper alloys is a problem that needs to be urgently solved in current high-performance copper alloy materials. CN114318055A discloses a high-strength, high-conductivity, and high-toughness copper alloy and a preparation method thereof. However, the tensile strength and conductivity of the high-strength, high-conductivity, and high-toughness copper alloy are not excellent enough.

[0003] In summary, after extensive searches by the applicant, it has been found that at least the existing copper alloys in this field have problems of insufficient tensile strength and electrical conductivity. Therefore, it is necessary to develop or improve a high-strength and high-conductivity copper alloy material. Summary of the Invention

[0004] Based on this, in order to solve the problem that the tensile strength and electrical conductivity of existing copper alloys are not excellent enough, the present invention provides a high-strength and high-conductivity copper alloy material. The specific technical solution is as follows:

[0005] A high-strength and high-conductivity copper alloy material, wherein the raw materials for preparing the copper alloy material include liquid A and liquid B;

[0006] The raw materials for preparing the liquid A include gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution;

[0007] The raw materials for preparing the B solution include copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus;

[0008] The mass ratio of the liquid A to the liquid B is 1:2.8-3.2.

[0009] Furthermore, the average particle size of the graphene nanosheets is 3 to 7 μm, and the surface area is 120 to 150 m 2 / g;

[0010] The concentration of the sulfuric acid aqueous solution is 8-12 wt %.

[0011] Furthermore, the preparation method of the liquid A comprises the following steps:

[0012] Add gadolinium oxide, chromium oxide, and strontium oxide to a sulfuric acid aqueous solution, stir at a speed of 800-900 r / min for 5-7 hours, then add copper acetate, heat to 80-90° C., and then stir at a speed of 950-1050 r / min for 2-3 hours to obtain the solution A;

[0013] In the liquid A, the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution is 1.5-2.5:25-35:0.1-0.5:0.3-0.7:69-73.

[0014] Furthermore, the preparation method of the liquid B comprises the following steps:

[0015] The graphene nanosheets and black phosphorus are added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 70 to 90 kHz for 40 to 50 minutes. Then, copper acetate is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 5 to 6 hours. Then, hydrazine is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 1.5 to 2.5 hours to obtain the solution B.

[0016] In the liquid B, the mass ratio of the copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 60-70:125-135:50-60:5-11:3-7:1-3.

[0017] This technical solution also provides a method for preparing a copper alloy material, which comprises the following steps:

[0018] The liquid A and the liquid B are mixed, and then stirred at a speed of 1300-1400 r / min for 2-3 hours, and then heated to 120-130° C. for hydrothermal reaction for 8-12 hours, and then naturally cooled and centrifuged, and the precipitate is washed three times or more with deionized water, and then washed three times or more with anhydrous ethanol, and then vacuum dried at 90-100° C. to obtain a copper alloy precursor;

[0019] The copper alloy precursor is added to a quartz boat, which is then placed in a slide rail furnace, into which methane and hydrogen are introduced, and the temperature is raised to 550-650° C. at a heating rate of 5° C. / min, followed by vapor deposition and reduction at the temperature for 45-55 minutes, and then cooled to obtain a copper alloy intermediate;

[0020] Filling the copper alloy intermediate with a mold and then performing a cold pressing process to obtain a copper alloy cold pressed material;

[0021] hot extrusion the copper alloy cold-pressed material under an argon atmosphere to obtain a copper alloy hot-extruded material;

[0022] hot-rolling the copper alloy hot-extruded material to obtain a copper alloy hot-rolled material;

[0023] cold-rolling the copper alloy hot-rolled material to obtain a copper alloy cold-rolled material;

[0024] performing an aging treatment on the copper alloy cold-rolled material under an argon atmosphere to obtain a copper alloy aging material;

[0025] The copper alloy aging material is cold treated and then restored to room temperature to obtain the copper alloy material.

[0026] Furthermore, the temperature of the cold pressing treatment is 20-26° C., and the pressure of the cold pressing treatment is 360-380 MPa;

[0027] The temperature of the hot extrusion treatment is 710-730° C., the time of the hot extrusion treatment is 50-60 min, and the pressure of the hot extrusion treatment is 35-39 MPa.

[0028] Furthermore, the temperature of the hot rolling process is 800-900° C., and the total deformation of the hot rolling process is 50-70%.

[0029] Furthermore, the temperature of the cold rolling process is 23-27° C., and the total deformation of the cold rolling process is 60-80%.

[0030] Furthermore, the temperature of the aging treatment is 420-430° C., and the time of the aging treatment is 2.5-3.5 hours.

[0031] Furthermore, the cold treatment is to cool the temperature to 2-8°C at a rate of 10°C / min and keep the temperature for 1.2-1.8h.

[0032] The copper alloy material has both high strength and high conductivity because its raw materials contain gadolinium oxide, graphene nanosheets and black phosphorus. Specifically, the gadolinium oxide in liquid A is dissolved in a sulfuric acid aqueous solution and is uniformly mixed with copper acetate at the molecular level. The graphene nanosheets and black phosphorus in liquid B both have a layered structure. After liquid A and liquid B are mixed and reacted, the hydrazine therein can be heated in a mixture of methanol and ethanol to peel off the graphene nanosheets and black phosphorus, forming single-layer or few-layer graphene and black flakes. The single-layer or few-layer graphene and black flakes have The invention has excellent electron transfer performance. Due to the different atomic sizes of carbon and phosphorus, single-layer or few-layer graphene and black flakes can match and extend with each other and form a high-strength and high-conductivity alloy frame matrix with gadolinium, copper and other metal elements. The matrix is ​​subjected to vapor deposition and reduction of methane and hydrogen to form a high-strength and high-conductivity frame on its surface and inside. The high-strength and high-conductivity frame is further subjected to cold pressing, hot extrusion, hot rolling, cold rolling, aging and cold treatment to obtain a copper alloy material with excellent tensile strength and electrical conductivity, namely the high-strength and high-conductivity copper alloy material. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] A high-strength and high-conductivity copper alloy material in one embodiment of the present invention, wherein the raw materials for preparing the copper alloy material include liquid A and liquid B;

[0036] The raw materials for preparing the liquid A include gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution;

[0037] The raw materials for preparing the B solution include copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus;

[0038] The mass ratio of the liquid A to the liquid B is 1:2.8-3.2.

[0039] In one embodiment, the graphene nanosheets have an average particle size of 3 to 7 μm and a surface area of ​​120 to 150 m 2 / g;

[0040] The concentration of the sulfuric acid aqueous solution is 8-12 wt %.

[0041] In one embodiment, the method for preparing liquid A comprises the following steps:

[0042] Add gadolinium oxide, chromium oxide, and strontium oxide to a sulfuric acid aqueous solution, stir at a speed of 800-900 r / min for 5-7 hours, then add copper acetate, heat to 80-90° C., and then stir at a speed of 950-1050 r / min for 2-3 hours to obtain the solution A;

[0043] In the liquid A, the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution is 1.5-2.5:25-35:0.1-0.5:0.3-0.7:69-73.

[0044] In one embodiment, the method for preparing liquid B comprises the following steps:

[0045] The graphene nanosheets and black phosphorus are added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 70 to 90 kHz for 40 to 50 minutes. Then, copper acetate is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 5 to 6 hours. Then, hydrazine is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 1.5 to 2.5 hours to obtain the solution B.

[0046] In the liquid B, the mass ratio of the copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 60-70:125-135:50-60:5-11:3-7:1-3.

[0047] In one embodiment, the present technical solution provides a method for preparing a copper alloy material, which comprises the following steps:

[0048] The liquid A and the liquid B are mixed, and then stirred at a speed of 1300-1400 r / min for 2-3 hours, and then heated to 120-130° C. for hydrothermal reaction for 8-12 hours, and then naturally cooled and centrifuged, and the precipitate is washed three times or more with deionized water, and then washed three times or more with anhydrous ethanol, and then vacuum dried at 90-100° C. to obtain a copper alloy precursor;

[0049] The copper alloy precursor is added to a quartz boat, which is then placed in a slide rail furnace, into which methane and hydrogen are introduced, and the temperature is raised to 550-650° C. at a heating rate of 5° C. / min, followed by vapor deposition and reduction at the temperature for 45-55 minutes, and then cooled to obtain a copper alloy intermediate;

[0050] Filling the copper alloy intermediate with a mold and then performing a cold pressing process to obtain a copper alloy cold pressed material;

[0051] hot extrusion the copper alloy cold-pressed material under an argon atmosphere to obtain a copper alloy hot-extruded material;

[0052] hot-rolling the copper alloy hot-extruded material to obtain a copper alloy hot-rolled material;

[0053] cold-rolling the copper alloy hot-rolled material to obtain a copper alloy cold-rolled material;

[0054] performing an aging treatment on the copper alloy cold-rolled material under an argon atmosphere to obtain a copper alloy aging material;

[0055] The copper alloy aging material is cold treated and then restored to room temperature to obtain the copper alloy material.

[0056] In one embodiment, the temperature of the cold pressing treatment is 20-26° C., and the pressure of the cold pressing treatment is 360-380 MPa;

[0057] The temperature of the hot extrusion treatment is 710-730° C., the time of the hot extrusion treatment is 50-60 min, and the pressure of the hot extrusion treatment is 35-39 MPa.

[0058] In one embodiment, the temperature of the hot rolling process is 800-900° C., and the total deformation of the hot rolling process is 50-70%.

[0059] In one embodiment, the temperature of the cold rolling process is 23-27° C., and the total deformation of the cold rolling process is 60-80%.

[0060] In one embodiment, the temperature of the aging treatment is 420-430° C., and the time of the aging treatment is 2.5-3.5 hours.

[0061] In one embodiment, the cold treatment is to cool the temperature to 2-8°C at a rate of 10°C / min and keep the temperature for 1.2-1.8h.

[0062] The embodiments of the present invention will be described in detail below with reference to specific examples.

[0063] Example 1:

[0064] Preparation of Solution A: Gadolinium oxide, chromium oxide, and strontium oxide were added to a 10 wt% aqueous sulfuric acid solution and stirred at 850 r / min for 6 hours. Copper acetate was then added, the temperature was raised to 85°C, and the mixture was stirred at 1000 r / min for 2.5 hours to obtain Solution A, wherein the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide, and aqueous sulfuric acid solution was 2:30:0.3:0.5:71.

[0065] Preparation of liquid B: The average particle size is 5 μm and the surface area is 130 m 2 / g of graphene nanosheets and black phosphorus were added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 80 kHz for 45 minutes. Then, copper acetate was added, and the mixture was stirred at a speed of 1150 r / min for 5.5 hours. Then, hydrazine was added, and the mixture was stirred at a speed of 1150 r / min for 2 hours to obtain solution B, wherein the mass ratio of copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus was 65:130:55:8:5:2;

[0066] The above-mentioned liquid A and liquid B are mixed, and then stirred at a speed of 1350r / min for 2.5h, and then heated to 125℃ for hydrothermal reaction for 10h, naturally cooled and centrifuged, the precipitate is washed three times with deionized water, and then washed three times with anhydrous ethanol, and then vacuum dried at 95℃ to obtain a copper alloy precursor; the copper alloy precursor is added to a quartz boat, and then placed in a slide rail furnace, methane and hydrogen are introduced, and the temperature is raised to 600℃ at a heating rate of 5℃ / min, and then kept warm for 50min for vapor deposition and reduction, and a copper alloy intermediate is obtained after cooling; the copper alloy intermediate is filled with a mold, and then cold pressed at a temperature of 23℃ and a pressure of 370MPa to obtain a copper alloy cold pressed material; the copper alloy cold pressed material is placed in an argon furnace, and the copper alloy intermediate is heated to 600℃ at a heating rate of 5℃ / min. The copper alloy hot extrusion material is subjected to hot extrusion treatment in an argon atmosphere, the hot extrusion treatment time is 55 minutes, and the hot extrusion treatment pressure is 37 MPa to obtain a copper alloy hot extruded material; the copper alloy hot extruded material is subjected to hot rolling treatment, the hot rolling treatment temperature is 850°C, and the total deformation of the hot rolling treatment is 60% to obtain a copper alloy hot rolled material; the copper alloy hot rolled material is subjected to cold rolling treatment, the cold rolling treatment temperature is 25°C, and the total deformation of the cold rolling treatment is 70% to obtain a copper alloy cold rolled material; the copper alloy cold rolled material is subjected to aging treatment in an argon atmosphere, the aging treatment temperature is 425°C, and the aging treatment time is 3 hours to obtain a copper alloy aged material; the copper alloy aged material is subjected to cold treatment, the temperature is reduced to 5°C at a rate of 10°C / min and kept warm for 1.5 hours, and then returned to room temperature to obtain a copper alloy material.

[0067] Example 2:

[0068] The other parts are the same as those in Example 1. The difference from Example 1 is that in liquid A, the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution is 1.5:30:0.3:0.5:71.

[0069] Example 3:

[0070] The other parts are the same as those in Example 1. The difference from Example 1 is that in liquid A, the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution is 2.5:30:0.3:0.5:71.

[0071] Example 4:

[0072] The other parts are the same as those in Example 1. The difference from Example 1 is that in liquid B, the mass ratio of copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 65:130:55:8:5:3.

[0073] Example 5:

[0074] The other parts are the same as those in Example 1. The difference from Example 1 is that in liquid B, the mass ratio of copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 65:130:55:8:5:1.

[0075] Comparative Example 1:

[0076] Preparation of Solution A: Chromium oxide and strontium oxide were added to a 10 wt% aqueous sulfuric acid solution, stirred at 850 r / min for 6 h, then copper acetate was added, the temperature was raised to 85°C, and then stirred at 1000 r / min for 2.5 h to obtain Solution A, wherein the mass ratio of copper acetate, chromium oxide, strontium oxide, and aqueous sulfuric acid solution was 30:0.3:0.5:71;

[0077] Preparation of liquid B: The average particle size is 5 μm and the surface area is 130 m 2 / g of graphene nanosheets and black phosphorus were added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 80 kHz for 45 minutes. Then, copper acetate was added, and the mixture was stirred at a speed of 1150 r / min for 5.5 hours. Then, hydrazine was added, and the mixture was stirred at a speed of 1150 r / min for 2 hours to obtain solution B, wherein the mass ratio of copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus was 65:130:55:8:5:2;

[0078] The above-mentioned liquid A and liquid B are mixed, and then stirred at a speed of 1350r / min for 2.5h, and then heated to 125℃ for hydrothermal reaction for 10h, naturally cooled and centrifuged, the precipitate is washed three times with deionized water, and then washed three times with anhydrous ethanol, and then vacuum dried at 95℃ to obtain a copper alloy precursor; the copper alloy precursor is added to a quartz boat, and then placed in a slide rail furnace, methane and hydrogen are introduced, and the temperature is raised to 600℃ at a heating rate of 5℃ / min, and then kept warm for 50min for vapor deposition and reduction, and a copper alloy intermediate is obtained after cooling; the copper alloy intermediate is filled with a mold, and then cold pressed at a temperature of 23℃ and a pressure of 370MPa to obtain a copper alloy cold pressed material; the copper alloy cold pressed material is placed in an argon furnace, and the copper alloy intermediate is heated to 600℃ at a heating rate of 5℃ / min. The copper alloy hot extrusion material is subjected to hot extrusion treatment in an argon atmosphere, the hot extrusion treatment time is 55 minutes, and the hot extrusion treatment pressure is 37 MPa to obtain a copper alloy hot extruded material; the copper alloy hot extruded material is subjected to hot rolling treatment, the hot rolling treatment temperature is 850°C, and the total deformation of the hot rolling treatment is 60% to obtain a copper alloy hot rolled material; the copper alloy hot rolled material is subjected to cold rolling treatment, the cold rolling treatment temperature is 25°C, and the total deformation of the cold rolling treatment is 70% to obtain a copper alloy cold rolled material; the copper alloy cold rolled material is subjected to aging treatment in an argon atmosphere, the aging treatment temperature is 425°C, and the aging treatment time is 3 hours to obtain a copper alloy aged material; the copper alloy aged material is subjected to cold treatment, the temperature is reduced to 5°C at a rate of 10°C / min and kept warm for 1.5 hours, and then returned to room temperature to obtain a copper alloy material.

[0079] Comparative Example 2:

[0080] Preparation of Solution A: Gadolinium oxide, chromium oxide, and strontium oxide were added to a 10 wt% aqueous sulfuric acid solution and stirred at 850 r / min for 6 hours. Copper acetate was then added, the temperature was raised to 85°C, and the mixture was stirred at 1000 r / min for 2.5 hours to obtain Solution A, wherein the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide, and aqueous sulfuric acid solution was 2:30:0.3:0.5:71.

[0081] Preparation of liquid B: The average particle size is 5 μm and the surface area is 130 m 2 / g of graphene nanosheets were added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 80 kHz for 45 minutes. Then, copper acetate was added, and the mixture was stirred at a speed of 1150 r / min for 5.5 hours. Then, hydrazine was added, and the mixture was stirred at a speed of 1150 r / min for 2 hours to obtain solution B, wherein the mass ratio of copper acetate, ethanol, methanol, hydrazine and graphene nanosheets was 65:130:55:8:5;

[0082] The above-mentioned liquid A and liquid B are mixed, and then stirred at a speed of 1350r / min for 2.5h, and then heated to 125℃ for hydrothermal reaction for 10h, naturally cooled and centrifuged, the precipitate is washed three times with deionized water, and then washed three times with anhydrous ethanol, and then vacuum dried at 95℃ to obtain a copper alloy precursor; the copper alloy precursor is added to a quartz boat, and then placed in a slide rail furnace, methane and hydrogen are introduced, and the temperature is raised to 600℃ at a heating rate of 5℃ / min, and then kept warm for 50min for vapor deposition and reduction, and a copper alloy intermediate is obtained after cooling; the copper alloy intermediate is filled with a mold, and then cold pressed at a temperature of 23℃ and a pressure of 370MPa to obtain a copper alloy cold pressed material; the copper alloy cold pressed material is placed in an argon furnace, and the copper alloy intermediate is heated to 600℃ at a heating rate of 5℃ / min. The copper alloy hot extrusion material is subjected to hot extrusion treatment in an argon atmosphere, the hot extrusion treatment time is 55 minutes, and the hot extrusion treatment pressure is 37 MPa to obtain a copper alloy hot extruded material; the copper alloy hot extruded material is subjected to hot rolling treatment, the hot rolling treatment temperature is 850°C, and the total deformation of the hot rolling treatment is 60% to obtain a copper alloy hot rolled material; the copper alloy hot rolled material is subjected to cold rolling treatment, the cold rolling treatment temperature is 25°C, and the total deformation of the cold rolling treatment is 70% to obtain a copper alloy cold rolled material; the copper alloy cold rolled material is subjected to aging treatment in an argon atmosphere, the aging treatment temperature is 425°C, and the aging treatment time is 3 hours to obtain a copper alloy aged material; the copper alloy aged material is subjected to cold treatment, the temperature is reduced to 5°C at a rate of 10°C / min and kept warm for 1.5 hours, and then returned to room temperature to obtain a copper alloy material.

[0083] Comparative Example 3:

[0084] Preparation of Solution A: Gadolinium oxide, chromium oxide, and strontium oxide were added to a 10 wt% aqueous sulfuric acid solution and stirred at 850 r / min for 6 hours. Copper acetate was then added, the temperature was raised to 85°C, and the mixture was stirred at 1000 r / min for 2.5 hours to obtain Solution A, wherein the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide, and aqueous sulfuric acid solution was 2:30:0.3:0.5:71.

[0085] Preparation of Solution B: Black phosphorus was added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 80 kHz for 45 minutes. Then, copper acetate was added, and the mixture was stirred at a speed of 1150 r / min for 5.5 hours. Then, hydrazine was added, and the mixture was stirred at a speed of 1150 r / min for 2 hours to obtain Solution B, wherein the mass ratio of copper acetate, ethanol, methanol, hydrazine, and black phosphorus was 65:130:55:8:2;

[0086] The above-mentioned liquid A and liquid B are mixed, and then stirred at a speed of 1350r / min for 2.5h, and then heated to 125℃ for hydrothermal reaction for 10h, naturally cooled and centrifuged, the precipitate is washed three times with deionized water, and then washed three times with anhydrous ethanol, and then vacuum dried at 95℃ to obtain a copper alloy precursor; the copper alloy precursor is added to a quartz boat, and then placed in a slide rail furnace, methane and hydrogen are introduced, and the temperature is raised to 600℃ at a heating rate of 5℃ / min, and then kept warm for 50min for vapor deposition and reduction, and a copper alloy intermediate is obtained after cooling; the copper alloy intermediate is filled with a mold, and then cold pressed at a temperature of 23℃ and a pressure of 370MPa to obtain a copper alloy cold pressed material; the copper alloy cold pressed material is placed in an argon furnace, and the copper alloy intermediate is heated to 600℃ at a heating rate of 5℃ / min. The copper alloy hot extrusion material is subjected to hot extrusion treatment in an argon atmosphere, the hot extrusion treatment time is 55 minutes, and the hot extrusion treatment pressure is 37 MPa to obtain a copper alloy hot extruded material; the copper alloy hot extruded material is subjected to hot rolling treatment, the hot rolling treatment temperature is 850°C, and the total deformation of the hot rolling treatment is 60% to obtain a copper alloy hot rolled material; the copper alloy hot rolled material is subjected to cold rolling treatment, the cold rolling treatment temperature is 25°C, and the total deformation of the cold rolling treatment is 70% to obtain a copper alloy cold rolled material; the copper alloy cold rolled material is subjected to aging treatment in an argon atmosphere, the aging treatment temperature is 425°C, and the aging treatment time is 3 hours to obtain a copper alloy aged material; the copper alloy aged material is subjected to cold treatment, the temperature is reduced to 5°C at a rate of 10°C / min and kept warm for 1.5 hours, and then returned to room temperature to obtain a copper alloy material.

[0087] The copper alloy materials of Examples 1 to 5 and Comparative Examples 1 to 3 were tested for tensile strength and electrical conductivity, as shown in Table 1.

[0088] Table 1:

[0089] project Tensile strength (MPa) Conductivity (IACS) Example 1 829 90.3 Example 2 803 88.1 Example 3 807 88.5 Example 4 821 89.5 Example 5 818 89.8 Comparative Example 1 625 78.9 Comparative Example 2 687 81.6 Comparative Example 3 668 80.7

[0090] As can be seen from Table 1, by comparing Examples 1 to 5 with Comparative Examples 1 to 3, the copper alloy materials of Examples 1 to 5 have both high strength and high conductivity because their raw materials contain gadolinium oxide, graphene nanosheets and black phosphorus. Specifically, their tensile strength is as high as 800 MPa or more, and their electrical conductivity is as high as 88% IACS or more. The data of Examples 1 to 3 show that too high or too low a content of gadolinium oxide will affect the tensile strength and electrical conductivity of the copper alloy material. The data of Examples 1 and 4 to 5 show that too high or too low a content of black phosphorus will affect the tensile strength and electrical conductivity of the copper alloy material. More specifically, the gadolinium oxide in Solution A is dissolved in the sulfuric acid aqueous solution and is uniformly mixed with copper acetate at the molecular level. The graphene nanosheets and black phosphorus in Solution B are both It has a layered structure; after liquid A and liquid B are mixed and reacted, the hydrazine therein can peel off the graphene nanosheets and black phosphorus after heating in a mixture of methanol and ethanol, forming single-layer or few-layer graphene and black scales. The single-layer or few-layer graphene and black scales have excellent electron transfer performance. Due to the different atomic sizes of carbon and phosphorus, the single-layer or few-layer graphene and black scales can match and extend with each other and form a high-strength and high-conductivity alloy frame matrix with gadolinium, copper and other metal elements. The matrix is ​​subjected to vapor deposition and reduction of methane and hydrogen to form a high-strength and high-conductivity frame on its surface and inside; the high-strength and high-conductivity frame is further cold pressed, hot extruded, hot rolled, cold rolled, aged and cold treated to obtain a copper alloy material with excellent tensile strength and electrical conductivity, that is, a high-strength and high-conductivity copper alloy material.

[0091] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A high-strength and high-conductivity copper alloy material, characterized in that: The raw materials for preparing the copper alloy material include liquid A and liquid B; The raw materials for preparing the solution A include gadolinium oxide, copper acetate, chromium oxide, strontium oxide and a sulfuric acid aqueous solution; in the solution A, the mass ratio of the gadolinium oxide, copper acetate, chromium oxide, strontium oxide and the sulfuric acid aqueous solution is 1.5-2.5:25-35:0.1-0.5:0.3-0.7:69-73; The raw materials for preparing the B solution include copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus; in the B solution, the mass ratio of the copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 60-70:125-135:50-60:5-11:3-7:1-3; The mass ratio of liquid A to liquid B is 1:2.8-3.2; The method for preparing the high-strength and high-conductivity copper alloy material comprises the following steps: The liquid A and the liquid B are mixed, and then stirred at a speed of 1300-1400 r / min for 2-3 hours, and then heated to 120-130° C. for hydrothermal reaction for 8-12 hours, and then naturally cooled and centrifuged, and the precipitate is washed three times or more with deionized water, and then washed three times or more with anhydrous ethanol, and then vacuum dried at 90-100° C. to obtain a copper alloy precursor; The copper alloy precursor is added to a quartz boat, which is then placed in a slide rail furnace, into which methane and hydrogen are introduced, and the temperature is raised to 550-650° C. at a heating rate of 5° C. / min, followed by vapor deposition and reduction at the temperature for 45-55 minutes, and then cooled to obtain a copper alloy intermediate; Filling the copper alloy intermediate with a mold and then performing a cold pressing process to obtain a copper alloy cold pressed material; hot extrusion the copper alloy cold-pressed material under an argon atmosphere to obtain a copper alloy hot-extruded material; hot-rolling the copper alloy hot-extruded material to obtain a copper alloy hot-rolled material; cold-rolling the copper alloy hot-rolled material to obtain a copper alloy cold-rolled material; performing an aging treatment on the copper alloy cold-rolled material under an argon atmosphere to obtain a copper alloy aging material; The copper alloy aging material is cold treated and then restored to room temperature to obtain the copper alloy material.

2. The copper alloy material according to claim 1, characterized in that The average particle size of the graphene nanosheets is 3 to 7 μm, and the surface area is 120 to 150 m 2 / g; The concentration of the sulfuric acid aqueous solution is 8-12 wt %.

3. The copper alloy material according to claim 1, characterized in that The preparation method of the liquid A comprises the following steps: Add gadolinium oxide, chromium oxide, and strontium oxide to a sulfuric acid aqueous solution, stir at a speed of 800-900 r / min for 5-7 hours, then add copper acetate, heat to 80-90° C., and then stir at a speed of 950-1050 r / min for 2-3 hours to obtain the solution A; In the liquid A, the mass ratio of gadolinium oxide, copper acetate, chromium oxide, strontium oxide and sulfuric acid aqueous solution is 1.5-2.5:25-35:0.1-0.5:0.3-0.7:69-73.

4. The copper alloy material according to claim 1, characterized in that The preparation method of the B solution comprises the following steps: The graphene nanosheets and black phosphorus are added to a mixed solution of methanol and ethanol, and ultrasonicated at a frequency of 70 to 90 kHz for 40 to 50 minutes. Then, copper acetate is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 5 to 6 hours. Then, hydrazine is added, and the mixture is stirred at a speed of 1100 to 1200 r / min for 1.5 to 2.5 hours to obtain the solution B. In the liquid B, the mass ratio of the copper acetate, ethanol, methanol, hydrazine, graphene nanosheets and black phosphorus is 60-70:125-135:50-60:5-11:3-7:1-3.

5. The method for preparing the copper alloy material according to claim 1, wherein: It includes the following steps: The liquid A and the liquid B are mixed, and then stirred at a speed of 1300-1400 r / min for 2-3 hours, and then heated to 120-130° C. for hydrothermal reaction for 8-12 hours, and then naturally cooled and centrifuged, and the precipitate is washed three times or more with deionized water, and then washed three times or more with anhydrous ethanol, and then vacuum dried at 90-100° C. to obtain a copper alloy precursor; The copper alloy precursor is added to a quartz boat, which is then placed in a slide rail furnace, into which methane and hydrogen are introduced, and the temperature is raised to 550-650° C. at a heating rate of 5° C. / min, followed by vapor deposition and reduction at the temperature for 45-55 minutes, and then cooled to obtain a copper alloy intermediate; Filling the copper alloy intermediate with a mold and then performing a cold pressing process to obtain a copper alloy cold pressed material; hot extrusion the copper alloy cold-pressed material under an argon atmosphere to obtain a copper alloy hot-extruded material; hot-rolling the copper alloy hot-extruded material to obtain a copper alloy hot-rolled material; cold-rolling the copper alloy hot-rolled material to obtain a copper alloy cold-rolled material; performing an aging treatment on the copper alloy cold-rolled material under an argon atmosphere to obtain a copper alloy aging material; The copper alloy aging material is cold treated and then restored to room temperature to obtain the copper alloy material.

6. The preparation method according to claim 5, characterized in that The temperature of the cold pressing treatment is 20-26°C, and the pressure of the cold pressing treatment is 360-380 MPa; The temperature of the hot extrusion treatment is 710-730° C., the time of the hot extrusion treatment is 50-60 min, and the pressure of the hot extrusion treatment is 35-39 MPa.

7. The preparation method according to claim 5, characterized in that The temperature of the hot rolling process is 800-900° C., and the total deformation amount of the hot rolling process is 50-70%.

8. The preparation method according to claim 5, characterized in that The temperature of the cold rolling process is 23-27° C., and the total deformation amount of the cold rolling process is 60-80%.

9. The preparation method according to claim 5, characterized in that The temperature of the aging treatment is 420-430° C., and the time of the aging treatment is 2.5-3.5 hours.

10. The preparation method according to claim 5, characterized in that The cold treatment is to cool the temperature to 2-8°C at a rate of 10°C / min and keep the temperature for 1.2-1.8h.