CN113106286A - High-conductivity beryllium copper alloy bar for 5G communication and preparation process thereof - Google Patents
High-conductivity beryllium copper alloy bar for 5G communication and preparation process thereof Download PDFInfo
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Abstract
The invention discloses a high-conductivity beryllium copper alloy rod for 5G communication, and particularly relates to the technical field of beryllium copper alloy, wherein the high-conductivity beryllium copper alloy rod comprises the following elements: beryllium, nickel, molybdenum, titanium, graphene, silver, niobium, rare earth elements, and the balance of Cu and inevitable impurities. The addition of the nickel into the high-conductivity beryllium copper alloy rod for 5G communication can refine crystal grains in the alloy material and improve the uniformity of internal structure, the nickel and the total cerium of the rare earth elements can form a nano-sized nickel-cerium intermetallic compound, the nickel-cerium intermetallic compound has good conductivity and mechanical property, the rare earth elements can change the shape of inclusions in the alloy material, the inclusions can be spheroidized to convert the inclusions from a solid solution state into a rare earth compound to be precipitated, the conductivity efficiency and the yield of the beryllium copper alloy can be effectively improved, the strength of the beryllium copper alloy rod can be improved under the condition of ensuring the strength of the beryllium copper alloy rod, and the beryllium copper alloy rod can meet the use requirement of 5G communication.
Description
Technical Field
The invention relates to the technical field of beryllium-copper alloy, in particular to a high-conductivity beryllium-copper alloy rod for 5G communication and a preparation process thereof.
Background
Beryllium copper alloys are copper alloys with beryllium as the main alloying element, also known as beryllium bronze. The copper alloy is a high-grade elastic material with the best performance in copper alloy, and has a series of excellent physical, chemical and mechanical properties such as high strength, elasticity, hardness, fatigue strength, small elastic hysteresis, corrosion resistance, wear resistance, cold resistance, high conductivity, no magnetism, no spark generation due to impact and the like. The beryllium copper alloy has high strength, elasticity, wear resistance, fatigue resistance and heat resistance after quenching and tempering, and simultaneously has high electrical conductivity, thermal conductivity, cold resistance and non-magnetism, no spark when colliding, easy welding and brazing and excellent corrosion resistance in atmosphere, fresh water and seawater. After corrosion, the strength and the elongation rate are not changed, so the material can be kept in seawater for more than 40 years, and the material is an irreplaceable material for the submarine cable repeater structure. But also widely applied to the fields of aerospace, electronics and electrics, petrochemical industry, daily hardware and the like.
The annual demand of China for beryllium-containing copper alloy materials is about 4000t and is increased year by year, but the annual demand is limited by the technical level and the like, and more than 80% of the annual demand still depends on import. The low beryllium copper alloy has the advantages of high price of beryllium and high toxicity, has the beryllium content of 0.2-0.7 percent, has good conductive performance and certain strength and is widely applied, and has lower beryllium content than high-strength beryllium copper alloys such as TBe2, so the low beryllium copper alloy has the cost advantage and is beneficial to environmental protection. With the addition of low beryllium copper alloys such as TBe0.3-1.5, TBe0.4-1.8 and the like to the national standard, the low beryllium copper alloys are receiving more and more attention. At present, the tensile strength of domestic low beryllium copper alloy after aging is about 650-750MPa, the conductivity is 45-60% IACS, and the conductivity is generally lower limit because of higher contents of impurity elements and the like in the alloy. The tensile strength of the low beryllium copper alloy material produced by international known manufacturers such as NGK is 700-950MPa, and the conductivity is 50-60% IACS; the beryllium content in the high-strength beryllium copper alloy is 1.6-2.1%, the tensile strength can be over 1400MPa at most after aging, but the electrical conductivity is only 22% IACS.
With the continuous development of the 5G communication technology in China, the usage amount of the low beryllium copper alloy is increased, the existing low beryllium copper alloy has insufficient strength and reduced service life, and the conductivity of the beryllium copper alloy rod for 5G communication is reduced in order to meet the strength requirement of the low beryllium copper alloy and improve the beryllium content.
Disclosure of Invention
In order to overcome the defects in the prior art, embodiments of the present invention provide a high-conductivity beryllium copper alloy rod for 5G communications and a preparation process thereof, and the problems to be solved by the present invention are: how to improve the conductivity of the beryllium copper alloy while ensuring the strength of the beryllium copper alloy rod.
In order to achieve the purpose, the invention provides the following technical scheme: a high-conductivity beryllium copper alloy bar for 5G communication comprises the following elements in percentage by weight: beryllium: 0.2-0.8%, nickel: 1-2%, molybdenum 0.5-1.5%, titanium 0.05-0.15%, graphene: 0.2-0.6%, silver: 0.05 to 0.15%, niobium: 0.03-0.09%, 0.2-1.2% of rare earth elements, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the following elements are included in weight percent: 0.4-0.6%, nickel: 1.3-1.7%, molybdenum 0.8-1.2%, titanium 0.08-0.12%, graphene: 0.3-0.5%, silver: 0.08 to 0.12%, niobium: 0.05 to 0.07 percent of rare earth elements, 0.5 to 0.9 percent of rare earth elements, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the following elements are included in weight percent: beryllium: 0.4%, nickel: 1.5%, molybdenum 1%, titanium 0.1%, graphene: 0.4%, silver: 0.1%, niobium: 0.06% of rare earth elements, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the content of the unavoidable impurities is less than 0.005%, and the rare earth element is one of lanthanum, samarium and cerium, and the preferred rare earth element is cerium.
The invention also provides a preparation process of the high-conductivity beryllium copper alloy rod for 5G communication, which comprises the following specific preparation steps:
the method comprises the following steps: smelting, weighing the raw materials according to the weight percentage, and vacuumizing a vacuum smelting furnace to 3 multiplied by 10-3When pa, the weighed raw materials are sequentially put into a vacuum melting furnace, melting is carried out in the vacuum melting furnace for 30-50 minutes at the temperature of 1100-1200 ℃, and after the melting is finished, the melting liquid is introduced into a refining furnace for refining under the action of inert gas;
step two: casting to obtain a casting after refining, cutting the obtained cast rod to remove surface oxide scale, then carrying out vacuum induction melting at 1250-;
step three: hot rolling, rolling the casting obtained in the step two, wherein the casting is firstly subjected to primary rolling at the temperature of 800-;
step four: cold working, namely performing primary cold working deformation treatment by adopting a working rate of 60-80%, and then performing subzero treatment, wherein the temperature is reduced by 30-50 ℃ per hour during the subzero treatment until the temperature is reduced to-200 ℃, the temperature is kept for 6-10 hours, and then the temperature is increased by 30-50 ℃ per hour until the temperature is increased to room temperature;
step five: solution treatment, namely heating the cold-processed casting to 760-800 ℃ for heat preservation for 3-4h, and quenching after heat preservation;
step six: and (3) placing the quenched workpiece into a homogenizing furnace for homogenization treatment, performing aging treatment after the homogenization treatment, and obtaining the high-conductivity beryllium copper alloy rod for 5G communication after the aging treatment.
In a preferred embodiment, the beryllium, the nickel, the molybdenum, the titanium, the silver and the niobium weighed in the first step are respectively added in the forms of a Cu-Be intermediate alloy, a Cu-Ni intermediate alloy, a Cu-Mo intermediate alloy, a Cu-Ti intermediate alloy, a Cu-Ag intermediate alloy and a Cu-Nb intermediate alloy, the raw materials in the first step are sequentially put into a smelting furnace in the order of copper, nickel, silver, molybdenum, titanium, beryllium, graphene and rare earth elements, the temperature during refining in the first step is 1250-.
In a preferred embodiment, the number of effective rolling passes in the first rolling in the third step is 3-8, and the number of effective rolling passes in the finish rolling is 2-6.
In a preferred embodiment, the temperature during the casting in the second step is 1050-1150 ℃, and the diameter of the cast bar is 30-60 mm.
In a preferred embodiment, the temperature of the quenching treatment in the step five is 550-650 ℃, and the quenching treatment time is 12-18 minutes.
In a preferred embodiment, the temperature of the homogenization treatment in the sixth step is 500-600 ℃, the time of the homogenization treatment is 2-4h, the temperature of the aging treatment is 300-350 ℃, the time of the treatment is 6-10h, and the air cooling is performed to the room temperature after the aging treatment.
The invention has the technical effects and advantages that:
1. the high-conductivity beryllium copper alloy rod for 5G communication, which is prepared by adopting the raw material formula, has the advantages that the content of beryllium element in the beryllium copper alloy is controlled to be 0.2-0.8%, nickel, molybdenum, titanium, graphene, silver, niobium and rare earth elements are added into the beryllium copper alloy material, the addition of nickel can refine crystal grains in the alloy material and improve the uniformity of internal structure, so that the beryllium copper alloy material has good mechanical property, nickel and total cerium of the rare earth elements can form a nano-sized nickel-cerium intermetallic compound, the nickel-cerium intermetallic compound has good conductivity and mechanical property, the rare earth elements can change the shape of impurities in the alloy material, the impurities can be spheroidized to be separated out by converting the impurities from a solid solution state into the rare earth compound, the conductivity efficiency and the yield of the beryllium copper alloy can be effectively improved, the graphene can increase the dislocation density in the beryllium copper alloy material, the strength of the beryllium copper alloy rod can be improved under the condition of ensuring the strength of the beryllium copper alloy rod, so that the beryllium copper alloy rod can meet the use requirement of 5G communication;
2. according to the invention, the Cu-Be intermediate alloy, the Cu-Ni intermediate alloy, the Cu-Mo intermediate alloy, the Cu-Ag intermediate alloy, the Cu-Ti intermediate alloy and the Cu-Nb intermediate alloy are added into the beryllium copper alloy material by a smelting method to modify the beryllium copper alloy, and the obtained casting is subjected to hot rolling, cold processing, solution treatment, quenching treatment, homogenization treatment and aging treatment, so that the strength of the beryllium copper alloy rod can Be effectively improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a high-conductivity beryllium copper alloy bar for 5G communication, which comprises the following elements in percentage by weight: beryllium: 0.2%, nickel: 1%, molybdenum 0.5%, titanium 0.05%, graphene: 0.2%, silver: 0.05%, niobium: 0.03%, 0.2% of rare earth elements, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the content of the unavoidable impurities is less than 0.005%, and the rare earth element is one of lanthanum, samarium and cerium, and the preferred rare earth element is cerium.
The invention also provides a preparation process of the high-conductivity beryllium copper alloy rod for 5G communication, which comprises the following specific preparation steps:
the method comprises the following steps: smelting, weighing the raw materials according to the weight percentage, and vacuumizing a vacuum smelting furnace to 3 multiplied by 10-3When pa, the weighed raw materials are sequentially put into a vacuum smelting furnace, smelting is carried out in the vacuum smelting furnace for 40 minutes at 1150 ℃, and after the smelting is finished, the smelting liquid is introduced into a refining furnace for refining under the action of inert gas;
step two: casting to obtain a casting after refining, cutting the obtained cast rod, removing surface oxide skin, performing 1300 ℃ vacuum induction melting for 25 minutes, pouring molten metal into the investment mold, and cooling and demolding after pouring to obtain the cast rod;
step three: hot rolling, wherein the casting obtained in the second step is rolled, the casting is firstly subjected to initial rolling when the temperature is 820 ℃, and the casting is subjected to finish rolling after the initial rolling is finished, and the temperature during the finish rolling is 740 ℃;
step four: cold processing, wherein the primary cold processing deformation treatment is carried out by adopting a processing rate of 70%, and then the subzero treatment is carried out, wherein the temperature is reduced by 40 ℃ per hour during the subzero treatment until the temperature is reduced to-200 ℃, the temperature is kept for 8 hours, and then the temperature is increased by 40 ℃ per hour until the temperature is increased to the room temperature;
step five: solution treatment, namely heating the cold-processed casting to 780 ℃ and preserving heat for 3.5h, and quenching after heat preservation;
step six: and (3) placing the quenched workpiece into a homogenizing furnace for homogenization treatment, performing aging treatment after the homogenization treatment, and obtaining the high-conductivity beryllium copper alloy rod for 5G communication after the aging treatment.
In a preferred embodiment, the beryllium, the nickel, the molybdenum, the titanium, the silver and the niobium weighed in the first step are respectively added in the form of a Cu-Be intermediate alloy, a Cu-Ni intermediate alloy, a Cu-Mo intermediate alloy, a Cu-Ti intermediate alloy, a Cu-Ag intermediate alloy and a Cu-Nb intermediate alloy, the raw materials in the first step are sequentially put into a smelting furnace in the order of copper, nickel, silver, molybdenum, titanium, beryllium, graphene and rare earth elements, the refining temperature in the first step is 1300 ℃, and the refining time is 15 minutes.
In a preferred embodiment, the number of effective rolling passes in the first rolling in the third step is 5, and the number of effective rolling passes in the finish rolling is 4.
In a preferred embodiment, the temperature of the casting in the second step is 1100 ℃, and the diameter of the cast bar is 45 mm.
In a preferred embodiment, the temperature of the quenching treatment in the fifth step is 600 ℃, and the quenching treatment time is 16 minutes.
In a preferred embodiment, the temperature for the homogenization treatment in the sixth step is 550 ℃, the time for the homogenization treatment is 3 hours, the temperature for the aging treatment is 330 ℃, the time for the treatment is 8 hours, and the air cooling is performed after the aging treatment to room temperature.
Example 2:
different from the embodiment 1, the high-conductivity beryllium copper alloy bar for 5G communication comprises the following elements in percentage by weight: beryllium: 0.4%, nickel: 1.5%, molybdenum 1%, titanium 0.1%, graphene: 0.4%, silver: 0.1%, niobium: 0.06% of rare earth elements, and the balance of Cu and inevitable impurities.
Example 3:
different from the embodiments 1-2, the high-conductivity beryllium copper alloy bar for 5G communication comprises the following elements in percentage by weight: beryllium: 0.8%, nickel: 2%, 1.5% of molybdenum, 0.15% of titanium, and graphene: 0.6%, silver: 0.15%, niobium: 0.09%, rare earth elements 1.2%, and the balance of Cu and inevitable impurities.
Example 4:
a high-conductivity beryllium copper alloy bar for 5G communication comprises the following elements in percentage by weight: beryllium: 0.2%, nickel: 1%, molybdenum 0.5%, titanium 0.05%, silver: 0.05%, niobium: 0.03%, 0.2% of rare earth elements, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the content of the unavoidable impurities is less than 0.005%, and the rare earth element is one of lanthanum, samarium and cerium, and the preferred rare earth element is cerium.
The invention also provides a preparation process of the high-conductivity beryllium copper alloy rod for 5G communication, which comprises the following specific preparation steps:
the method comprises the following steps: smelting, weighing the raw materials according to the weight percentage, and vacuumizing a vacuum smelting furnace to 3 multiplied by 10-3When pa, the weighed raw materials are sequentially put into a vacuum smelting furnace, smelting is carried out in the vacuum smelting furnace for 40 minutes at 1150 ℃, and after the smelting is finished, the smelting liquid is introduced into a refining furnace for refining under the action of inert gas;
step two: casting to obtain a casting after refining, cutting the obtained cast rod, removing surface oxide skin, performing 1300 ℃ vacuum induction melting for 25 minutes, pouring molten metal into the investment mold, and cooling and demolding after pouring to obtain the cast rod;
step three: hot rolling, wherein the casting obtained in the second step is rolled, the casting is firstly subjected to initial rolling when the temperature is 820 ℃, and the casting is subjected to finish rolling after the initial rolling is finished, and the temperature during the finish rolling is 740 ℃;
step four: cold processing, wherein the primary cold processing deformation treatment is carried out by adopting a processing rate of 70%, and then the subzero treatment is carried out, wherein the temperature is reduced by 40 ℃ per hour during the subzero treatment until the temperature is reduced to-200 ℃, the temperature is kept for 8 hours, and then the temperature is increased by 40 ℃ per hour until the temperature is increased to the room temperature;
step five: solution treatment, namely heating the cold-processed casting to 780 ℃ and preserving heat for 3.5h, and quenching after heat preservation;
step six: and (3) placing the quenched workpiece into a homogenizing furnace for homogenization treatment, performing aging treatment after the homogenization treatment, and obtaining the high-conductivity beryllium copper alloy rod for 5G communication after the aging treatment.
In a preferred embodiment, the beryllium, the nickel, the molybdenum, the titanium, the silver and the niobium weighed in the first step are respectively added in the forms of a Cu-Be intermediate alloy, a Cu-Ni intermediate alloy, a Cu-Mo intermediate alloy, a Cu-Ti intermediate alloy, a Cu-Ag intermediate alloy and a Cu-Nb intermediate alloy, the raw materials in the first step are sequentially put into a smelting furnace in the order of copper, nickel, silver, molybdenum, titanium, beryllium and rare earth elements, the temperature during refining in the first step is 1300 ℃, and the refining time is 15 minutes.
In a preferred embodiment, the number of effective rolling passes in the first rolling in the third step is 5, and the number of effective rolling passes in the finish rolling is 4.
In a preferred embodiment, the temperature of the casting in the second step is 1100 ℃, and the diameter of the cast bar is 45 mm.
In a preferred embodiment, the temperature of the quenching treatment in the fifth step is 600 ℃, and the quenching treatment time is 16 minutes.
In a preferred embodiment, the temperature for the homogenization treatment in the sixth step is 550 ℃, the time for the homogenization treatment is 3 hours, the temperature for the aging treatment is 330 ℃, the time for the treatment is 8 hours, and the air cooling is performed after the aging treatment to room temperature.
Example 5:
a high-conductivity beryllium copper alloy bar for 5G communication comprises the following elements in percentage by weight: beryllium: 0.2%, nickel: 1%, molybdenum 0.5%, titanium 0.05%, graphene: 0.2%, silver: 0.05%, niobium: 0.03%, and the balance of Cu and inevitable impurities.
In a preferred embodiment, the unavoidable impurities content is less than 0.005%.
The invention also provides a preparation process of the high-conductivity beryllium copper alloy rod for 5G communication, which comprises the following specific preparation steps:
the method comprises the following steps: smelting, weighing the raw materials according to the weight percentage, and vacuumizing a vacuum smelting furnace to 3 multiplied by 10-3When pa, the weighed raw materials are sequentially put into a vacuum smelting furnace, smelting is carried out in the vacuum smelting furnace for 40 minutes at 1150 ℃, and after the smelting is finished, the smelting liquid is introduced into a refining furnace for refining under the action of inert gas;
step two: casting to obtain a casting after refining, cutting the obtained cast rod, removing surface oxide skin, performing 1300 ℃ vacuum induction melting for 25 minutes, pouring molten metal into the investment mold, and cooling and demolding after pouring to obtain the cast rod;
step three: hot rolling, wherein the casting obtained in the second step is rolled, the casting is firstly subjected to initial rolling when the temperature is 820 ℃, and the casting is subjected to finish rolling after the initial rolling is finished, and the temperature during the finish rolling is 740 ℃;
step four: cold processing, wherein the primary cold processing deformation treatment is carried out by adopting a processing rate of 70%, and then the subzero treatment is carried out, wherein the temperature is reduced by 40 ℃ per hour during the subzero treatment until the temperature is reduced to-200 ℃, the temperature is kept for 8 hours, and then the temperature is increased by 40 ℃ per hour until the temperature is increased to the room temperature;
step five: solution treatment, namely heating the cold-processed casting to 780 ℃ and preserving heat for 3.5h, and quenching after heat preservation;
step six: and (3) placing the quenched workpiece into a homogenizing furnace for homogenization treatment, performing aging treatment after the homogenization treatment, and obtaining the high-conductivity beryllium copper alloy rod for 5G communication after the aging treatment.
In a preferred embodiment, the beryllium, the nickel, the molybdenum, the titanium, the silver and the niobium weighed in the step one are respectively added in the form of a Cu-Be intermediate alloy, a Cu-Ni intermediate alloy, a Cu-Mo intermediate alloy, a Cu-Ti intermediate alloy, a Cu-Ag intermediate alloy and a Cu-Nb intermediate alloy, the raw materials in the step one are sequentially put into a smelting furnace in the order of copper, nickel, silver, molybdenum, titanium, beryllium and graphene, and the refining temperature in the step one is 1300 ℃ and the refining time is 15 minutes.
In a preferred embodiment, the number of effective rolling passes in the first rolling in the third step is 5, and the number of effective rolling passes in the finish rolling is 4.
In a preferred embodiment, the temperature of the casting in the second step is 1100 ℃, and the diameter of the cast bar is 45 mm.
In a preferred embodiment, the temperature of the quenching treatment in the fifth step is 600 ℃, and the quenching treatment time is 16 minutes.
In a preferred embodiment, the temperature for the homogenization treatment in the sixth step is 550 ℃, the time for the homogenization treatment is 3 hours, the temperature for the aging treatment is 330 ℃, the time for the treatment is 8 hours, and the air cooling is performed after the aging treatment to room temperature.
The beryllium copper alloy rods produced in the above examples 1, 2, 3, 4 and 5 were respectively selected as experimental group 1, 2, 3, 4 and 5, and the mechanical properties and the electrical conductivity of the selected beryllium copper alloy rods were respectively tested by using the conventional beryllium copper alloy rods as a control group. The measurement results are shown in the table I:
watch 1
As can be seen from table one, compared with the conventional beryllium copper alloy rod produced by the present invention, the yield strength, the tensile strength and the vickers hardness of the beryllium copper alloy rod produced by the present invention are all significantly increased, and the electrical conductivity of the beryllium copper alloy rod is higher, and the graphene and the rare earth element are respectively used in examples 4 and 5, while the mechanical properties of the beryllium copper alloy rod produced by examples 4 and 5 are significantly less than those of the beryllium copper alloy rod produced by example 1, so that it is proved that the addition of the nickel into the beryllium copper alloy rod produced by the present invention can refine the crystal grains inside the alloy material, improve the uniformity of the internal structure, make the beryllium copper alloy material have good mechanical properties, and the nickel can form a nickel-cerium intermetallic compound with a nano size with the total cerium of the rare earth element, the nickel-cerium intermetallic compound has good electrical conductivity and mechanical properties, and the rare earth element can change the shape of the inclusions in the alloy material, the invention can spheroidize inclusions to convert the inclusions from a solid solution state to a rare earth compound for precipitation, can effectively improve the conductive efficiency and the yield of the beryllium copper alloy, can increase the dislocation density in the beryllium copper alloy material by using the graphene, thereby improving the bending strength and the hardness of the beryllium copper alloy material, can distribute niobium in a very dispersed particle form in the beryllium copper alloy to form an ordered composite structure, greatly improves the strength and the hardness of the beryllium copper alloy, and has small influence on the conductivity of the beryllium copper alloy rod.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A high-conductivity beryllium copper alloy rod for 5G communication is characterized in that: comprises the following elements in percentage by weight: beryllium: 0.2-0.8%, nickel: 1-2%, molybdenum 0.5-1.5%, titanium 0.05-0.15%, graphene: 0.2-0.6%, silver: 0.05 to 0.15%, niobium: 0.03-0.09%, 0.2-1.2% of rare earth elements, and the balance of Cu and inevitable impurities.
2. The high-conductivity beryllium copper alloy rod for 5G communication according to claim 1, which is characterized in that: the alloy comprises the following elements in percentage by weight: 0.4-0.6%, nickel: 1.3-1.7%, molybdenum 0.8-1.2%, titanium 0.08-0.12%, graphene: 0.3-0.5%, silver: 0.08 to 0.12%, niobium: 0.05 to 0.07 percent of rare earth elements, 0.5 to 0.9 percent of rare earth elements, and the balance of Cu and inevitable impurities.
3. The high-conductivity beryllium copper alloy rod for 5G communication according to claim 1, which is characterized in that: comprises the following elements in percentage by weight: beryllium: 0.4%, nickel: 1.5%, molybdenum 1%, titanium 0.1%, graphene: 0.4%, silver: 0.1%, niobium: 0.06% of rare earth elements, and the balance of Cu and inevitable impurities.
4. The high-conductivity beryllium copper alloy rod for 5G communication according to claim 1, which is characterized in that: the content of the inevitable impurities is lower than 0.005%, the rare earth element is one of lanthanum, samarium and cerium, and the preferred rare earth element is cerium.
5. The process for preparing the high-conductivity beryllium copper alloy rod for 5G communication according to any one of claims 1 to 4, wherein the process comprises the following steps: the preparation method comprises the following specific steps:
the method comprises the following steps: smelting, weighing the raw materials according to the weight percentage, and vacuumizing a vacuum smelting furnace to 3 multiplied by 10-3When pa, the weighed raw materials are sequentially put into a vacuum melting furnace, melting is carried out in the vacuum melting furnace for 30-50 minutes at the temperature of 1100-1200 ℃, and after the melting is finished, the melting liquid is introduced into a refining furnace for refining under the action of inert gas;
step two: casting to obtain a casting after refining, cutting the obtained cast rod to remove surface oxide scale, then carrying out vacuum induction melting at 1250-;
step three: hot rolling, rolling the casting obtained in the step two, wherein the casting is firstly subjected to primary rolling at the temperature of 800-;
step four: cold working, namely performing primary cold working deformation treatment by adopting a working rate of 60-80%, and then performing subzero treatment, wherein the temperature is reduced by 30-50 ℃ per hour during the subzero treatment until the temperature is reduced to-200 ℃, the temperature is kept for 6-10 hours, and then the temperature is increased by 30-50 ℃ per hour until the temperature is increased to room temperature;
step five: solution treatment, namely heating the cold-processed casting to 760-800 ℃ for heat preservation for 3-4h, and quenching after heat preservation;
step six: and (3) placing the quenched workpiece into a homogenizing furnace for homogenization treatment, performing aging treatment after the homogenization treatment, and obtaining the high-conductivity beryllium copper alloy rod for 5G communication after the aging treatment.
6. The preparation process of the high-conductivity beryllium copper alloy rod for 5G communication according to claim 5, wherein the preparation process comprises the following steps: beryllium, nickel, molybdenum, titanium, silver and niobium weighed in the first step are respectively added in the forms of Cu-Be intermediate alloy, Cu-Ni intermediate alloy, Cu-Mo intermediate alloy, Cu-Ti intermediate alloy, Cu-Ag intermediate alloy and Cu-Nb intermediate alloy, the raw materials in the first step are sequentially put into a smelting furnace in the order of copper, nickel, silver, molybdenum, titanium, beryllium, graphene and rare earth elements, the temperature during refining in the first step is 1250-1350 ℃, and the refining time is 12-18 minutes.
7. The preparation process of the high-conductivity beryllium copper alloy rod for 5G communication according to claim 5, wherein the preparation process comprises the following steps: and in the third step, the number of effective rolling passes in the initial rolling is 3-8, and the number of effective rolling passes in the finish rolling is 2-6.
8. The preparation process of the high-conductivity beryllium copper alloy rod for 5G communication according to claim 5, wherein the preparation process comprises the following steps: the temperature during the casting in the second step is 1050-1150 ℃, and the diameter of the cast bar is 30-60 mm.
9. The preparation process of the high-conductivity beryllium copper alloy rod for 5G communication according to claim 5, wherein the preparation process comprises the following steps: the temperature of the quenching treatment in the step five is 550-650 ℃, and the quenching treatment time is 12-18 minutes.
10. The preparation process of the high-conductivity beryllium copper alloy rod for 5G communication according to claim 5, wherein the preparation process comprises the following steps: the temperature of the homogenization treatment in the sixth step is 500-600 ℃, the time of the homogenization treatment is 2-4h, the temperature of the aging treatment is 300-350 ℃, the time of the treatment is 6-10h, and the air cooling is carried out to the room temperature after the aging treatment.
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