阅读说明：本技术 一种高强高导耐热铜合金线材及其制备方法 (High-strength high-conductivity heat-resistant copper alloy wire and preparation method thereof ) 是由 韦建敏 张晓蓓 张小波 刘正斌 于 2021-09-08 设计创作，主要内容包括：本发明公开了一种高强高导耐热铜合金线材及其制备方法,所述高强高导耐热铜合金线材按重量百分比包括下述化学元素：硅0.05%-0.25%；锰0.2%-0.5%；镁0.2%-0.3%；铬0.1%-0.2%；钙0.05%-0.1%；钨0.2%-0.4%；磷0.05%-0.08%；铍0.02%-0.05%；锶0.001%-0.002%；铈0.2%-0.5%；镱0.05%-0.07%；钴0.1%-0.2%；钒0.2%-0.5%；镉0.1%-0.3%；钕0.01%-0.03%；余量为铜。本发明的高强高导耐热铜合金线材,具有高强、高导、耐热性能好的优点,能广泛应用于电子信息、航空航天等高科技领域。(The invention discloses a high-strength high-conductivity heat-resistant copper alloy wire and a preparation method thereof, wherein the high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight: 0.05% -0.25% of silicon; 0.2 to 0.5 percent of manganese; 0.2 to 0.3 percent of magnesium; 0.1 to 0.2 percent of chromium; 0.05 to 0.1 percent of calcium; 0.2 to 0.4 percent of tungsten; 0.05 to 0.08 percent of phosphorus; beryllium 0.02% -0.05%; 0.001% -0.002% of strontium; 0.2 to 0.5 percent of cerium; 0.05 to 0.07 percent of ytterbium; 0.1 to 0.2 percent of cobalt; 0.2 to 0.5 percent of vanadium; 0.1 to 0.3 percent of cadmium; 0.01 to 0.03 percent of neodymium; the balance being copper. The high-strength high-conductivity heat-resistant copper alloy wire rod disclosed by the invention has the advantages of high strength, high conductivity and good heat resistance, and can be widely applied to the high-tech fields of electronic information, aerospace and the like.)

1. The utility model provides a heat-resisting copper alloy wire rod of high strength high conductance which characterized in that: the material comprises the following chemical elements in percentage by weight: 0.05% -0.25% of silicon; 0.2 to 0.5 percent of manganese; 0.2 to 0.3 percent of magnesium; 0.1 to 0.2 percent of chromium; 0.05 to 0.1 percent of calcium; 0.2 to 0.4 percent of tungsten; 0.05 to 0.08 percent of phosphorus; beryllium 0.02% -0.05%; 0.001% -0.002% of strontium; 0.2 to 0.5 percent of cerium; 0.05 to 0.07 percent of ytterbium; 0.1 to 0.2 percent of cobalt; 0.2 to 0.5 percent of vanadium; 0.1 to 0.3 percent of cadmium; 0.01 to 0.03 percent of neodymium; the balance being copper;

the preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for smelting, heating to 1250-;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1400 ℃ and 1500 ℃, and preserving heat for 20-30 min; stirring and slagging off in the smelting process;

(4) when the temperature is reduced to 1200-1300 ℃, adding a refining agent into the induction smelting furnace, uniformly stirring, refining, keeping the temperature at 1200-1300 ℃, and obtaining a copper alloy melt after slagging off; the adding amount of the refining agent is 0.5 to 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.3-0.9 atmospheric pressure, and controlling the casting temperature to be 1220-;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire by using a wire drawing machine, and controlling the lubricating temperature to be 75-85 ℃;

(7) sending the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1-2h at the temperature of 850-; and then the copper alloy wire is put into hot water with the temperature of 40-50 ℃ for treatment for 2-3h, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

2. The high-strength high-conductivity heat-resistant copper alloy wire rod according to claim 1, characterized in that: the weight percentages of the chemical elements are respectively as follows: 0.1% -0.2% of silicon; 0.3 to 0.4 percent of manganese; 0.22 to 0.28 percent of magnesium; 0.12 to 0.18 percent of chromium; 0.07 percent to 0.09 percent of calcium; 0.25% -0.35% of tungsten; 0.06% -0.07% of phosphorus; beryllium 0.03% -0.04%; 0.0012 to 0.0018 percent of strontium; 0.3 to 0.4 percent of cerium; ytterbium 0.055% -0.065%; 0.12 to 0.18 percent of cobalt; 0.3 to 0.4 percent of vanadium; 0.15 to 0.25 percent of cadmium; 0.015% -0.025% of neodymium; the balance being copper.

3. The high-strength high-conductivity heat-resistant copper alloy wire rod according to claim 1, characterized in that: the weight percentages of the chemical elements are respectively as follows: 0.15% of silicon; 0.35 percent of manganese; 0.25 percent of magnesium; 0.15 percent of chromium; 0.08 percent of calcium; 0.15 percent of nickel; 0.3% of tungsten; 0.06% of phosphorus; 0.04% of beryllium; 0.0015% of strontium; 0.35% of cerium; 0.06% of ytterbium; 0.15 percent of cobalt; 0.3 percent of vanadium; 0.2 percent of cadmium; 0.02% of neodymium; the balance being copper.

4. The method for producing a high-strength, high-conductivity and heat-resistant copper alloy wire rod according to any one of claims 1 to 3, characterized in that: the preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for smelting, heating to 1250-;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1400 ℃ and 1500 ℃, and preserving heat for 20-30 min; stirring and slagging off in the smelting process;

(4) when the temperature is reduced to 1200-1300 ℃, adding a refining agent into the induction smelting furnace, uniformly stirring, refining, keeping the temperature at 1200-1300 ℃, and obtaining a copper alloy melt after slagging off; the adding amount of the refining agent is 0.5 to 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.3-0.9 atmospheric pressure, and controlling the casting temperature to be 1220-;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire by using a wire drawing machine, and controlling the lubricating temperature to be 75-85 ℃;

(7) sending the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1-2h at the temperature of 850-; and then the copper alloy wire is put into hot water with the temperature of 40-50 ℃ for treatment for 2-3h, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

5. The method for preparing the high-strength, high-conductivity and heat-resistant copper alloy wire rod according to claim 4, wherein the method comprises the following steps: in the step (2), the temperature is increased to 1300 ℃, and the temperature is kept for 100 min.

6. The method for preparing the high-strength, high-conductivity and heat-resistant copper alloy wire rod according to claim 4, wherein the method comprises the following steps: in the step (3), the temperature is increased to 1450 ℃, and the temperature is kept for 25 min.

7. The method for preparing the high-strength, high-conductivity and heat-resistant copper alloy wire rod according to claim 4, wherein the method comprises the following steps: in the step (4), the adding amount of the refining agent is 1% of the weight of the melt in the induction melting furnace.

8. The method for preparing the high-strength, high-conductivity and heat-resistant copper alloy wire rod according to claim 4, wherein the method comprises the following steps: in the step (4), solution treatment is carried out for 1.5h at the temperature of 880 ℃, online quenching is carried out, then cold drawing is carried out, online aging heat treatment is carried out for 1.5h at the temperature of 450 ℃, secondary cold drawing is carried out, and treatment is carried out for 1.5h at the temperature of 220 ℃; and then, the copper alloy wire is treated in hot water at the temperature of 45 ℃ for 2.5 hours, and then is naturally cooled to the normal temperature, so that the high-strength high-conductivity heat-resistant copper alloy wire is obtained.

Technical Field

The invention relates to the technical field of copper alloy wires, in particular to a high-strength high-conductivity heat-resistant copper alloy wire and a preparation method thereof.

Background

Copper and copper alloys have been widely used in important industrial sectors such as electrical engineering, power and machine manufacturing because of their high strength, excellent electrical conductivity, thermal conductivity and corrosion resistance. However, with the development of scientific technology and modern industry, higher requirements are put on the comprehensive properties of copper and copper alloy. Lead frames of large-scale integrated circuits, rotor leads of large-scale high-speed turbine generators, contact materials, electrodes of various spot welding machines and seam welding machines, overhead leads of large-scale electric locomotives, commutators of electric tools, high-voltage switch reeds, microwave tubes, aerospace vehicle components and the like all require materials to have higher strength and hardness while maintaining excellent conductivity. The components in the heat exchange environment, such as the jet ignition spray hole in the power plant boiler, the gas cutting gun nozzle, the inner lining of the crystallizer of the continuous casting machine, the inner lining of the combustion chamber of the high-thrust rocket engine and the like, require the material to have very good electrical conductivity and thermal conductivity, and also require the material to have high enough thermal strength. Therefore, people are continuously exploring functional materials with excellent comprehensive physical properties and mechanical properties, namely high-strength and high-conductivity copper alloy.

Copper and copper alloys have versatile and outstanding performance properties. Such as high electrical conductivity and high thermal conductivity; diamagnetism; high mechanical property and plasticity; fourthly, the corrosion resistance is high; the alloy has good alloying capacity, can improve the temperature, toughness, wear resistance and elasticity, and can keep high electrical conductivity and thermal conductivity; sixthly, antibacterial performance and regeneration performance. With the development of science and technology, higher requirements are put forward on the comprehensive performance of copper and copper alloy. How to improve the strength of copper as much as possible on the premise of keeping some excellent properties of pure copper is an important direction for scientific research of materials.

The applicant finds that the existing copper alloy wire has the defect of insufficient strength, and cannot be well applied to the high-tech fields of aerospace and the like. Meanwhile, the applicant also finds that the high-strength high-conductivity heat-resistant copper alloy wire has higher market value and larger development space, so that a research and development team is constructed to carry out deep research on the high-strength high-conductivity heat-resistant copper alloy wire.

Disclosure of Invention

The invention aims to provide a high-strength high-conductivity heat-resistant copper alloy wire and a preparation method thereof, and aims to solve the technical problem that the copper alloy wire in the prior art is insufficient in strength.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a high-strength high-conductivity heat-resistant copper alloy wire which comprises the following chemical elements in percentage by weight: 0.05% -0.25% of silicon; 0.2 to 0.5 percent of manganese; 0.2 to 0.3 percent of magnesium; 0.1 to 0.2 percent of chromium; 0.05 to 0.1 percent of calcium; 0.2 to 0.4 percent of tungsten; 0.05 to 0.08 percent of phosphorus; beryllium 0.02% -0.05%; 0.001% -0.002% of strontium; 0.2 to 0.5 percent of cerium; 0.05 to 0.07 percent of ytterbium; 0.1 to 0.2 percent of cobalt; 0.2 to 0.5 percent of vanadium; 0.1 to 0.3 percent of cadmium; 0.01 to 0.03 percent of neodymium; the balance being copper;

the preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for smelting, heating to 1250-;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1400 ℃ and 1500 ℃, and preserving heat for 20-30 min; stirring and slagging off in the smelting process;

(4) when the temperature is reduced to 1200-1300 ℃, adding a refining agent into the induction smelting furnace, uniformly stirring, refining, keeping the temperature at 1200-1300 ℃, and obtaining a copper alloy melt after slagging off; the adding amount of the refining agent is 0.5 to 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.3-0.9 atmospheric pressure, and controlling the casting temperature to be 1220-;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire by using a wire drawing machine, and controlling the lubricating temperature to be 75-85 ℃;

(7) sending the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1-2h at the temperature of 850-; and then the copper alloy wire is put into hot water with the temperature of 40-50 ℃ for treatment for 2-3h, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Further, the weight percentages of the chemical elements are respectively as follows: 0.1% -0.2% of silicon; 0.3 to 0.4 percent of manganese; 0.22 to 0.28 percent of magnesium; 0.12 to 0.18 percent of chromium; 0.07 percent to 0.09 percent of calcium; 0.25% -0.35% of tungsten; 0.06% -0.07% of phosphorus; beryllium 0.03% -0.04%; 0.0012 to 0.0018 percent of strontium; 0.3 to 0.4 percent of cerium; ytterbium 0.055% -0.065%; 0.12 to 0.18 percent of cobalt; 0.3 to 0.4 percent of vanadium; 0.15 to 0.25 percent of cadmium; 0.015% -0.025% of neodymium; the balance being copper.

Further, the weight percentages of the chemical elements are respectively as follows: 0.15% of silicon; 0.35 percent of manganese; 0.25 percent of magnesium; 0.15 percent of chromium; 0.08 percent of calcium; 0.15 percent of nickel; 0.3% of tungsten; 0.06% of phosphorus; 0.04% of beryllium; 0.0015% of strontium; 0.35% of cerium; 0.06% of ytterbium; 0.15 percent of cobalt; 0.3 percent of vanadium; 0.2 percent of cadmium; 0.02% of neodymium; the balance being copper.

The invention provides a preparation method of a high-strength high-conductivity heat-resistant copper alloy wire, wherein the preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation method comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for smelting, heating to 1250-;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1400 ℃ and 1500 ℃, and preserving heat for 20-30 min; stirring and slagging off in the smelting process;

(4) when the temperature is reduced to 1200-1300 ℃, adding a refining agent into the induction smelting furnace, uniformly stirring, refining, keeping the temperature at 1200-1300 ℃, and obtaining a copper alloy melt after slagging off; the adding amount of the refining agent is 0.5 to 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.3-0.9 atmospheric pressure, and controlling the casting temperature to be 1220-;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire by using a wire drawing machine, and controlling the lubricating temperature to be 75-85 ℃;

(7) sending the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1-2h at the temperature of 850-; and then the copper alloy wire is put into hot water with the temperature of 40-50 ℃ for treatment for 2-3h, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Further, in the step (2), the temperature is increased to 1300 ℃, and the temperature is kept for 100 min.

Further, in the step (3), the temperature is increased to 1450 ℃, and the temperature is kept for 25 min.

Further, in the step (4), the adding amount of the refining agent is 1% of the weight of the melt in the induction melting furnace.

Further, in the step (4), solution treatment is carried out for 1.5h at the temperature of 880 ℃, online quenching is carried out, then cold drawing is carried out, aging heat treatment is carried out for 1.5h at the temperature of 450 ℃ online, secondary cold drawing is carried out, and treatment is carried out for 1.5h at the temperature of 220 ℃; and then, the copper alloy wire is treated in hot water at the temperature of 45 ℃ for 2.5 hours, and then is naturally cooled to the normal temperature, so that the high-strength high-conductivity heat-resistant copper alloy wire is obtained.

Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:

according to the high-strength high-conductivity heat-resistant copper alloy wire and the preparation method thereof, all the raw materials are matched with each other, the added cobalt, strontium, cerium, ytterbium, vanadium, cadmium and neodymium are beneficial to improvement of mechanical properties, improvement of heat resistance and improvement of conductivity, and through matching of preparation processes, the tensile strength of the prepared high-strength high-conductivity heat-resistant copper alloy wire can reach more than 680Mpa, the conductivity can reach more than 85%, and the heat resistance is good.

Detailed Description

Description of raw materials:

the refining agent used in examples 1 to 6 was a copper alloy refining agent produced by Ningboding Innovative materials, Inc.

First, preparation example

Example 1:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.15% of silicon; 0.35 percent of manganese; 0.25 percent of magnesium; 0.15 percent of chromium; 0.08 percent of calcium; 0.15 percent of nickel; 0.3% of tungsten; 0.06% of phosphorus; 0.04% of beryllium; 0.0015% of strontium; 0.35% of cerium; 0.06% of ytterbium; 0.15 percent of cobalt; 0.3 percent of vanadium; 0.2 percent of cadmium; 0.02% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for melting, heating to 1300 ℃, and preserving heat for 100 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1450 ℃, and preserving heat for 25 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction smelting furnace when the temperature is reduced to 1250 ℃, uniformly stirring, refining, keeping the temperature at 1250 ℃, and slagging off to obtain a copper alloy melt; the adding amount of the refining agent is 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.6 atmosphere, and controlling the casting temperature to be 1250 ℃ to obtain a copper alloy rod blank;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 80 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1.5h at the temperature of 880 ℃, carrying out on-line quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out on-line aging heat treatment for 1.5h at the temperature of 450 ℃, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment for 1.5h at the temperature of 220 ℃; and then, the copper alloy wire is treated in hot water at the temperature of 45 ℃ for 2.5 hours, and then is naturally cooled to the normal temperature, so that the high-strength high-conductivity heat-resistant copper alloy wire is obtained.

Example 2:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.2% of silicon; 0.4 percent of manganese; 0.28 percent of magnesium; 0.18 percent of chromium; 0.07 percent of calcium; 0.2% of tungsten; 0.08 percent of phosphorus; 0.02% of beryllium; 0.0018% of strontium; 0.4% of cerium; ytterbium 0.055%; 0.12 percent of cobalt; 0.4 percent of vanadium; 0.15 percent of cadmium; 0.025% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw materials in the step (1) into an induction smelting furnace for melting, heating to 1250 ℃, and preserving heat for 120 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1400 ℃, and preserving heat for 30 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction smelting furnace when the temperature is reduced to 1200 ℃, uniformly stirring, refining, keeping the temperature at 1200 ℃, and removing slag to obtain a copper alloy melt; the adding amount of the refining agent is 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.3 atmosphere, and controlling the casting temperature to be 1230 ℃ to obtain a copper alloy rod blank;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 75 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment at 920 ℃ for 1h, carrying out online quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out aging heat treatment at 470 ℃ for 1h on line, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment at 230 ℃ for 1 h; and then the copper alloy wire is put into hot water with the temperature of 50 ℃ for treatment for 2 hours, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Example 3:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.2% of silicon; 0.3 percent of manganese; 0.22 percent of magnesium; 0.12 percent of chromium; 0.09% of calcium; 0.4% of tungsten; 0.05 percent of phosphorus; 0.05% of beryllium; 0.0018% of strontium; 0.3 percent of cerium; ytterbium 0.065%; 0.18 percent of cobalt; 0.3 percent of vanadium; 0.25% of cadmium; 0.015% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw material in the step (1) into an induction smelting furnace for melting, heating to 1350 ℃, and preserving heat for 80 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1500 ℃, and preserving heat for 20 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction smelting furnace when the temperature is reduced to 1300 ℃, uniformly stirring, refining, keeping the temperature at 1300 ℃, and slagging off to obtain a copper alloy melt; the adding amount of the refining agent is 0.5 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.9 atmosphere, and obtaining a copper alloy rod blank at the casting temperature of 1260 ℃;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 85 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 2h at the temperature of 850 ℃, carrying out online quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out aging heat treatment for 2h at the temperature of 410 ℃ on line, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment for 2h at the temperature of 210 ℃; and then the copper alloy wire is put into hot water with the temperature of 40 ℃ for treatment for 3 hours, and then the copper alloy wire is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Example 4:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.25% of silicon; 0.5 percent of manganese; 0.3 percent of magnesium; 0.2 percent of chromium; 0.1 percent of calcium; 0.35% of tungsten; 0.06% of phosphorus; 0.04% of beryllium; 0.001 percent of strontium; 0.5% of cerium; ytterbium 0.07%; 0.1 percent of cobalt; 0.5 percent of vanadium; 0.1% of cadmium; 0.03% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw material in the step (1) into an induction smelting furnace for melting, heating to 1270 ℃, and preserving heat for 110 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1470 ℃, and keeping the temperature for 28 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction melting furnace when the temperature is reduced to 1270 ℃, uniformly stirring, refining, keeping the temperature at 1270 ℃, and removing slag to obtain a copper alloy melt; the adding amount of the refining agent is 0.8 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.5 atmosphere, and obtaining a copper alloy rod blank at the casting temperature of 1270 ℃;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 77 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment at 900 ℃ for 1.2h, carrying out on-line quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out aging heat treatment at 420 ℃ for 1.8h on line, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment at 215 ℃ for 1.2 h; and then the copper alloy wire is treated in hot water at 42 ℃ for 2.8h, and then is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Example 5:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.2% of silicon; 0.4 percent of manganese; 0.3 percent of magnesium; 0.2 percent of chromium; 0.08 percent of calcium; 0.25% of tungsten; 0.07 percent of phosphorus; 0.03% of beryllium; 0.002% of strontium; 0.4% of cerium; 0.6 percent of ytterbium; 0.1 percent of cobalt; 0.2 percent of vanadium; 0.3 percent of cadmium; 0.01% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw material in the step (1) into an induction smelting furnace for melting, heating to 1320 ℃, and preserving heat for 90 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1420 ℃, and preserving heat for 23 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction melting furnace when the temperature is reduced to 1230 ℃, uniformly stirring, refining, keeping the temperature at 1230 ℃, and removing slag to obtain a copper alloy melt; the adding amount of the refining agent is 0.6 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.6 atmosphere, and obtaining a copper alloy rod blank at the casting temperature of 1260 ℃;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 75 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment at 900 ℃ for 2h, carrying out on-line quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out aging heat treatment at 470 ℃ for 2h on line, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment at 220 ℃ for 2 h; and then, sending the copper alloy wire into hot water with the temperature of 45 ℃ for treatment for 2 hours, and naturally cooling the copper alloy wire to the normal temperature to obtain the high-strength high-conductivity heat-resistant copper alloy wire.

Example 6:

a high-strength high-conductivity heat-resistant copper alloy wire comprises the following chemical elements in percentage by weight:

the invention provides a chemical fertilizer which comprises the following chemical elements in percentage by weight: 0.05% of silicon; 0.2 percent of manganese; 0.2 percent of magnesium; 0.1 percent of chromium; 0.05 percent of calcium; 0.35% of tungsten; 0.07 percent of phosphorus; 0.04% of beryllium; 0.002% of strontium; 0.2% of cerium; 0.05 percent of ytterbium; 0.2 percent of cobalt; 0.5 percent of vanadium; 0.3 percent of cadmium; 0.03% of neodymium; the balance being copper.

The preparation raw material of the copper alloy wire comprises cathode electrolytic copper, and the preparation comprises the following steps:

(1) preparing raw materials according to the weight percentage of the chemical elements;

(2) adding cathode electrolytic copper in the raw material in the step (1) into an induction smelting furnace for melting, heating to 1350 ℃, and preserving heat for 120 min;

(3) adding the rest raw materials in the step (1) into an induction melting furnace for melting, heating to 1500 ℃, and preserving heat for 30 min; stirring and slagging off in the smelting process;

(4) adding a refining agent into the induction smelting furnace when the temperature is reduced to 1300 ℃, uniformly stirring, refining, keeping the temperature at 1300 ℃, and slagging off to obtain a copper alloy melt; the adding amount of the refining agent is 1 percent of the weight of the melt in the induction melting furnace;

(5) transferring the copper alloy melt obtained in the step (4) into an upward continuous casting furnace, controlling the pressure of protective gas on the liquid surface of the upward continuous casting furnace to be 0.7 atmosphere, and controlling the casting temperature to be 1230 ℃ to obtain a copper alloy rod blank;

(6) drawing the copper alloy rod blank obtained in the step (5) into a copper alloy single wire with the diameter of 2.0mm by using a wire drawing machine, and controlling the lubricating temperature to be 82 ℃;

(7) feeding the copper alloy single wire obtained in the step (6) into a heat treatment furnace, carrying out solution treatment for 1.8h at the temperature of 860 ℃, carrying out on-line quenching, then carrying out cold drawing to obtain a copper alloy primary wire with the diameter of 1.2mm, carrying out on-line aging heat treatment for 1.2h at the temperature of 450 ℃, carrying out cold drawing for the second time to obtain a drawn wire with the diameter of 0.12mm, and carrying out treatment for 1.8h at the temperature of 225 ℃; and then the copper alloy wire is put into hot water with the temperature of 48 ℃ for treatment for 2.2h, and then is naturally cooled to the normal temperature, thus obtaining the high-strength high-conductivity heat-resistant copper alloy wire.

Second, experimental example:

1. the mechanical properties of the high-strength high-conductivity heat-resistant copper alloy wires prepared in examples 1 to 6 were tested according to GB/T228.1-2010, and the conductivity of the high-strength high-conductivity heat-resistant copper alloy wires prepared in examples 1 to 6 was tested according to GB/T32791-2016, and the results are shown in Table 1 below:

TABLE 1 test results of high-strength, high-conductivity and heat-resistant copper alloy wire rod properties in examples 1 to 6

As can be seen from table 1, the high-strength, high-conductivity and heat-resistant copper alloy wires prepared in examples 1 to 6 of the present invention have excellent mechanical properties, high electrical conductivity, and good heat resistance.