Aluminum or aluminum alloy cable preparation process

Abstract

The present invention discloses a process for preparing aluminum or aluminum alloy cables, and belongs to the technical field of cable preparation. The present invention selects metal raw materials of specific formula as cable core materials, and obtains aluminum alloy core materials by controlling the parameters of smelting, degassing, impurity removal, casting, forging, forming, drawing and other processes; and then obtains aluminum alloy cables by wrapping with insulation layers, armor layers and outer sheaths. The entire preparation process of the present invention is relatively simple, with low requirements for equipment and processing conditions, and is suitable for large-scale mass production; the armored protective layer formed by self-locking greatly improves the mechanical properties of the entire cable; controlling the compaction process parameters can make up for the deficiency of aluminum alloy conductors and copper conductors in equal volumetric capacity, reduce the outer diameter and improve the conductivity.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable preparation, and in particular relates to a process for preparing an aluminum or aluminum alloy cable. Background Art

[0002] With the advancement of productivity and the development of the cable industry, the demand for cables continues to increase. In existing technologies, cables primarily use copper as the core conductor, but its high price hinders industry competition. People are trying to replace traditional copper conductors with other metal conductors to reduce manufacturing costs while still meeting the requirements of normal cable use.

[0003] Power cables, especially those installed on bridges, culverts, underground projects, and various types of buildings, must possess conductors with excellent mechanical properties. Aluminum alloy power cables utilize aluminum alloy conductors, employing advanced technologies such as a special roll-formed stranding process and annealing treatment. These alloy cables address the shortcomings of pure aluminum cables. While their electrical conductivity isn't improved, their bending properties, creep resistance, and corrosion resistance are enhanced, ensuring continuous and stable performance under prolonged overloads and overheating. The use of aluminum alloy conductors improves their electrical conductivity and high-temperature resistance, while also addressing the creep issues associated with pure aluminum conductors. For the same volume, aluminum alloy weighs approximately one-third that of copper. Therefore, for the same current carrying capacity, aluminum alloy cables weigh approximately half as much as copper cables. Replacing copper cables with aluminum alloy cables reduces cable weight, lowers installation costs, reduces wear on equipment and cables, and makes installation easier.

[0004] Therefore, how to use aluminum or aluminum alloy as the cable core and prepare aluminum alloy cables with conductivity comparable to copper and excellent mechanical properties by adjusting the formula of various metal raw materials and special roll forming and wire drawing annealing processes has become a problem that needs to be solved at present. Summary of the Invention

[0005] The first purpose of the present invention is to propose a process for preparing aluminum or aluminum alloy cables. The entire preparation process is simple, has low requirements on equipment and processing conditions, and is suitable for large-scale mass production.

[0006] A second object of the present invention is to provide an aluminum or aluminum alloy cable having good electrical conductivity, strong bending resistance, corrosion resistance and good weather resistance.

[0007] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0008] An aluminum or aluminum alloy cable comprises a cable core material and a protective layer. The cable core material comprises, by weight, 1 to 2.5 parts of copper, 0.3 to 0.8 parts of magnesium, 0.5 to 1.5 parts of titanium, 0.5 to 1 part of nickel, 0.1 to 0.3 parts of cadmium, 0.1 to 0.2 parts of cobalt, 0.8 to 1.2 parts of zinc, 0.1 to 0.2 parts of platinum, 0.3 to 0.5 parts of silver and 92 to 98 parts of aluminum.

[0009] Furthermore, the cable core material comprises, by weight, 2.5 parts of copper, 0.3 parts of magnesium, 0.5 parts of titanium, 0.5 parts of nickel, 0.3 parts of cadmium, 0.1 parts of cobalt, 1.2 parts of zinc, 0.2 parts of platinum, 0.5 parts of silver, and 96 parts of aluminum.

[0010] Furthermore, the protective layer includes an armor layer and an outer protective layer; the armor layer is an aluminum alloy strip, and the outer protective layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS.

[0011] Furthermore, the preparation process of any of the above-mentioned aluminum or aluminum alloy cables comprises the following steps:

[0012] (1) Place the raw materials of the cable core material components into a high-temperature melting furnace and smelt them under stirring. After the raw materials are melted, add a refining agent and then refine them. After the refining is completed, degas and let it stand until the oxidized slag fully floats and is then removed;

[0013] (2) using a semi-continuous water cooling method to cast to obtain a casting blank;

[0014] (3) homogenizing the ingot obtained in step (2) and then placing it in a high-temperature calcining furnace for forging. The ingot after forging is placed in a continuous rolling mill to be rolled into a round aluminum rod, which is then coiled and compacted to obtain a compacted coil;

[0015] (4) placing the coil obtained in step (3) into an extruder for extrusion molding to obtain a wire; then placing the wire into a wire drawing machine, and finally obtaining an aluminum alloy core material after drawing and aging treatment;

[0016] (5) coating the aluminum alloy core material with an insulation layer to obtain a cable core coated with an insulation layer;

[0017] (6) pre-pressing the aluminum alloy strip into an "S"-shaped curved surface, wrapping the cable core material coated with the insulation layer prepared in step (5) clockwise around the core material surface, and buckling them together to form a self-locking armor protection layer;

[0018] (7) The glass fiber reinforced PVC composite material is made into an outer sheath, and after cooling treatment, the cable core and the outer sheath are assembled to obtain an aluminum alloy cable.

[0019] Furthermore, the melting temperature of the cable core material is 850-880°C.

[0020] Furthermore, in the refining process, the refining agent is sodium fluorosilicate and cryolite; the refining temperature is 750-790°C and the refining time is 45-90 minutes.

[0021] Furthermore, in step (2), the temperature of the semi-continuous water-cooled casting is 750-780° C., the speed is 100 mm / min, the cooling water pressure is 0.35 MPa, and the water flow rate is 2200 L / min.

[0022] Furthermore, in the step (3), the compaction coefficient controlled by the compaction process is 0.92.

[0023] Furthermore, in step (4), the cross-sectional area of ​​the wire obtained after extrusion molding is 2.5 mm 2 .

[0024] Furthermore, in step (4), the drawing rate is 5 m / min, and the cross-sectional area of ​​the aluminum alloy core material obtained after drawing and aging treatment is 1.5 mm 2 .

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] 1) The present invention prepares an aluminum alloy cable core by using a special formula, then modifies the surface of the aluminum alloy conductor, and assembles it using an insulating layer. The obtained aluminum alloy cable has a simple entire preparation process, has low requirements on equipment and processing conditions, and is suitable for large-scale mass production.

[0027] 2) The present invention pre-presses the aluminum alloy strip into an "S"-shaped curved surface, wraps it clockwise around the conductor surface with the aluminum alloy core conductor as the center, and interlocks with each other to form a self-locking armor protection layer, which greatly improves the mechanical properties of the entire cable.

[0028] 3) After forging, the present invention places the billet into a continuous rolling mill to be rolled into a round aluminum rod, which is then coiled. A compaction process is used to control the compaction coefficient to 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the conductivity. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with specific embodiments.

[0030] Unless otherwise specified, the raw materials and equipment used in the following examples are all products that can be obtained by existing technical means.

[0031] The test methods for the cables in the following embodiments are as follows: tensile strength is tested according to GB / T228.1-2010, yield strength is tested according to ISO 6892-1, elongation at break is tested according to ISO 6892-1, and conductivity is tested according to GB / T3956-2008.

[0032] Example 1

[0033] An aluminum or aluminum alloy cable comprises a cable core material, an insulation layer and a protective layer. The weight proportions of the components of the cable core material are as follows: 2.5 parts of copper, 0.3 parts of magnesium, 0.5 parts of titanium, 0.5 parts of nickel, 0.3 parts of cadmium, 0.1 parts of cobalt, 1.2 parts of zinc, 0.2 parts of platinum, 0.5 parts of silver, and 96 parts of aluminum. The insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS. The protective layer comprises an armor layer and an outer sheath. The armor layer is an aluminum alloy strip that can provide good mechanical protection and corrosion resistance. The outer sheath is prepared from a glass fiber reinforced PVC composite material.

[0034] A process for preparing an aluminum or aluminum alloy cable, comprising the following steps:

[0035] (1) The raw materials of the cable core material components are placed in a melting furnace at 880 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 750 ° C for 90 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0036] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 750°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0037] (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace at 450° C. for forging. The ingot after forging is placed in a continuous rolling mill and rolled into a round aluminum rod, which is then coiled. A compacting process is adopted with a compacting coefficient controlled to be 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the electrical conductivity.

[0038] (4) The alloy material after compaction in step (3) is placed in an extruder for extrusion molding, and finally a cross-sectional area of ​​2.5 mm is obtained. 2 of wire.

[0039] (5) The wire obtained in step (4) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0040] (6) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to obtain a cable core coated with an insulation layer.

[0041] (7) The aluminum alloy strip is pre-pressed into an "S"-shaped curved surface, and is wrapped clockwise around the surface of the cable core material coated with the insulation layer prepared in step (6) and interlocked to form a self-locking armor protection layer.

[0042] (8) The glass fiber reinforced PVC composite material is made into an outer sheath by extrusion molding. After cooling, the cable core and the outer sheath are directly assembled according to the actual size to obtain an aluminum alloy cable.

[0043] Example 2

[0044] An aluminum or aluminum alloy cable comprises a cable core material, an insulation layer and a protective layer, wherein the weight proportions of the components of the cable core material are: 1.5 parts of copper, 0.5 parts of magnesium, 1.0 parts of titanium, 0.8 parts of nickel, 0.2 parts of cadmium, 0.1 parts of cobalt, 1.0 parts of zinc, 0.1 parts of platinum, 0.3 parts of silver, and 98 parts of aluminum; the insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS; the protective layer comprises an armor layer and an outer sheath; the armor layer is an aluminum alloy strip, which can provide good mechanical protection and corrosion resistance; the outer sheath is prepared from a glass fiber reinforced PVC composite material.

[0045] A process for preparing an aluminum or aluminum alloy cable, comprising the following steps:

[0046] (1) The raw materials of the cable core material components are placed in a melting furnace at 860 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 790 ° C for 45 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0047] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 750°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0048] (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace at 450° C. for forging. The ingot after forging is placed in a continuous rolling mill and rolled into a round aluminum rod, which is then coiled. A compacting process is adopted with a compacting coefficient controlled to be 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the electrical conductivity.

[0049] (4) The alloy material after compaction in step (3) is placed in an extruder for extrusion molding, and finally a cross-sectional area of ​​2.5 mm is obtained. 2of wire.

[0050] (5) The wire obtained in step (4) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0051] (6) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to obtain a cable core coated with an insulation layer.

[0052] (7) The aluminum alloy strip is pre-pressed into an "S"-shaped curved surface, and is wrapped clockwise around the surface of the cable core material coated with the insulation layer prepared in step (6) and interlocked to form a self-locking armor protection layer.

[0053] (8) The glass fiber reinforced PVC composite material is made into an outer sheath by extrusion molding. After cooling, the cable core and the outer sheath are directly assembled according to the actual size to obtain an aluminum alloy cable.

[0054] Example 3

[0055] An aluminum or aluminum alloy cable comprises a cable core material, an insulation layer and a protective layer. The weight proportions of the components of the cable core material are as follows: 2.0 parts of copper, 0.8 parts of magnesium, 1.5 parts of titanium, 1 part of nickel, 0.1 parts of cadmium, 0.2 parts of cobalt, 0.8 parts of zinc, 0.1 parts of platinum, 0.5 parts of silver, and 95 parts of aluminum. The insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS. The protective layer comprises an armor layer and an outer sheath. The armor layer is an aluminum alloy strip that can provide good mechanical protection and corrosion resistance. The outer sheath is prepared from a glass fiber reinforced PVC composite material.

[0056] A process for preparing an aluminum or aluminum alloy cable, comprising the following steps:

[0057] (1) The raw materials of the cable core material components are placed in a melting furnace at 870 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 750 ° C for 90 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0058] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 780°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0059] (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace at 450° C. for forging. The ingot after forging is placed in a continuous rolling mill and rolled into a round aluminum rod, which is then coiled. A compacting process is adopted with a compacting coefficient controlled to be 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the conductive performance.

[0060] (4) The alloy material after compaction in step (3) is placed in an extruder for extrusion molding, and finally a cross-sectional area of ​​2.5 mm is obtained. 2 of wire.

[0061] (5) The wire obtained in step (4) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0062] (6) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to obtain a cable core coated with an insulation layer.

[0063] (7) The aluminum alloy strip is pre-pressed into an "S"-shaped curved surface, and is wrapped clockwise around the surface of the cable core material coated with the insulation layer prepared in step (6) and interlocked to form a self-locking armor protection layer.

[0064] (8) The glass fiber reinforced PVC composite material is made into an outer sheath by extrusion molding. After cooling, the cable core and the outer sheath are directly assembled according to the actual size to obtain an aluminum alloy cable.

[0065] Example 4

[0066] An aluminum or aluminum alloy cable comprises a cable core material, an insulation layer and a protective layer. The weight proportions of the components of the cable core material are as follows: 1.0 part copper, 0.6 part magnesium, 1.2 part titanium, 0.6 part nickel, 0.3 part cadmium, 0.2 part cobalt, 1.2 parts zinc, 0.2 part platinum, 0.3 part silver, and 92 parts aluminum. The insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS. The protective layer comprises an armor layer and an outer sheath. The armor layer is an aluminum alloy strip that can provide good mechanical protection and corrosion resistance. The outer sheath is prepared from a glass fiber reinforced PVC composite material.

[0067] A process for preparing an aluminum or aluminum alloy cable, comprising the following steps:

[0068] (1) The raw materials of the cable core material components are placed in a melting furnace at 880 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 750 ° C for 90 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0069] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 750°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0070] (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace at 450° C. for forging. The ingot after forging is placed in a continuous rolling mill and rolled into a round aluminum rod, which is then coiled. A compacting process is adopted with a compacting coefficient controlled to be 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the conductive performance.

[0071] (4) The alloy material after compaction in step (3) is placed in an extruder for extrusion molding, and finally a cross-sectional area of ​​2.5 mm is obtained. 2 of wire.

[0072] (5) The wire obtained in step (4) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0073] (6) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to obtain a cable core coated with an insulation layer.

[0074] (7) The aluminum alloy strip is pre-pressed into an "S"-shaped curved surface, and is wrapped clockwise around the surface of the cable core material coated with the insulation layer prepared in step (6) and interlocked to form a self-locking armor protection layer.

[0075] (8) The glass fiber reinforced PVC composite material is made into an outer sheath by extrusion molding. After cooling, the cable core and the outer sheath are directly assembled according to the actual size to obtain an aluminum alloy cable.

[0076] Example 5

[0077] An aluminum or aluminum alloy cable comprises a cable core material, an insulation layer and a protective layer. The weight proportions of the cable core material components are as follows: 2.5 parts copper, 0.5 parts magnesium, 1.5 parts titanium, 1 part nickel, 0.1 parts cadmium, 0.1 parts cobalt, 1.0 parts zinc, 0.2 parts platinum, 0.5 parts silver, and 94 parts aluminum. The insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber and ABS. The protective layer comprises an armor layer and an outer sheath. The armor layer is an aluminum alloy strip that can provide good mechanical protection and corrosion resistance. The outer sheath is prepared from a glass fiber reinforced PVC composite material.

[0078] A process for preparing an aluminum or aluminum alloy cable, comprising the following steps:

[0079] (1) The raw materials of the cable core material components are placed in a melting furnace at 850 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 750 ° C for 90 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0080] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 750°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0081] (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace at 450° C. for forging. The ingot after forging is placed in a continuous rolling mill and rolled into a round aluminum rod, which is then coiled. A compacting process is adopted with a compacting coefficient controlled to be 0.92 to compensate for the difference in volumetric capacity between the aluminum alloy conductor and the copper conductor, thereby reducing the outer diameter and improving the electrical conductivity.

[0082] (4) The alloy material after compaction in step (3) is placed in an extruder for extrusion molding, and finally a cross-sectional area of ​​2.5 mm is obtained. 2 of wire.

[0083] (5) The wire obtained in step (4) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0084] (6) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to obtain a cable core coated with an insulation layer.

[0085] (7) The aluminum alloy strip is pre-pressed into an "S"-shaped curved surface, and is wrapped clockwise around the surface of the cable core material coated with the insulation layer prepared in step (6) and interlocked to form a self-locking armor protection layer.

[0086] (8) The glass fiber reinforced PVC composite material is made into an outer sheath by extrusion molding. After cooling, the cable core and the outer sheath are directly assembled according to the actual size to obtain an aluminum alloy cable.

[0087] Comparative Example 1

[0088] An aluminum alloy cable comprises an aluminum alloy cable core and an insulation layer; the weight proportions of the components of the aluminum alloy cable core are: 2.5 parts of copper, 0.3 parts of magnesium, 0.5 parts of titanium, 0.5 parts of nickel, 0.3 parts of cadmium, 0.1 parts of cobalt, 1.2 parts of zinc, 0.2 parts of platinum, 0.5 parts of silver, and 96 parts of aluminum; the insulation layer is obtained by copolymerization of cross-linked polyethylene, silicone rubber, and ABS.

[0089] A process for preparing an aluminum alloy cable, the specific steps are as follows:

[0090] (1) The raw materials of the cable core material components are placed in a melting furnace at 850 ° C and smelted under stirring. After the raw materials are melted, sodium fluorosilicate and cryolite are added and refined at a temperature of 750 ° C for 90 minutes. After the refining is completed, degassing and standing for 30 minutes are carried out to allow the oxide slag to fully float and then be removed.

[0091] (2) Semi-continuous water cooling was used for casting, with a casting temperature of 750°C, a speed of 100 mm / min, a cooling water pressure of 0.35 MPa, and a water flow rate of 2200 L / min;

[0092] (3) The ingot obtained in step (2) was homogenized and then placed in a high-temperature calcining furnace at 450°C for forging. After forging, the ingot was placed in an extruder for extrusion molding to obtain a cross-sectional area of ​​2.5 mm. 2 of wire.

[0093] (4) The wire obtained in step (3) is placed in a wire drawing machine, and the aluminum alloy wire is drawn at a rate of 5 m / min and a lightening rate of 12%, and after aging treatment, a 1.5 mm thick aluminum alloy wire is finally obtained. 2 Aluminum alloy core material.

[0094] (5) The aluminum alloy core material is coated with an insulation layer. The insulation layer material is melted by a heating extruder, and the insulation layer material is continuously extruded and coated on the surface of the aluminum alloy core material under the dual action of the forming die and extrusion pressure to make an aluminum alloy cable.

[0095] Comparative Example 2

[0096] The same as Example 1, except that only the weight proportions of the components of the cable core material are changed, namely 3.0 parts of copper, 0.2 parts of magnesium, 2.0 parts of titanium, 1.5 parts of nickel, 0.5 parts of cadmium, 0.5 parts of cobalt, 1.5 parts of zinc, 0.5 parts of platinum, 0.8 parts of silver, and 90 parts of aluminum.

[0097] The aluminum alloy cables obtained in Examples 1 to 5 and Comparative Examples 1 to 2 were tested for mechanical properties and electrical conductivity (using copper as a reference), and the test results are shown in Table 1 below.

[0098] Table 1 Mechanical properties and electrical conductivity test results of aluminum alloy cables prepared in Examples 1 to 5

[0099]

[0100] Test results demonstrate that when the weight percentages of the cable core material components are outside the specified range, the conductivity of the resulting aluminum alloy cable decreases. Example 1 demonstrates that when the ratio of the cable core material metal raw materials is: 2.5 parts copper, 0.3 parts magnesium, 0.5 parts titanium, 0.5 parts nickel, 0.3 parts cadmium, 0.1 parts cobalt, 1.2 parts zinc, 0.2 parts platinum, 0.5 parts silver, and 96 parts aluminum, the resulting aluminum alloy cable exhibits optimal conductivity. Comparison of Comparative Example 1 with the various examples demonstrates that when the semi-continuously water-cooled casting slab is rolled into round aluminum rods in a continuous rolling mill, then coiled and compacted to a compression coefficient of 0.92, the aluminum alloy conductor can compensate for the volumetric capacity deficit of the copper conductor and improve mechanical properties.

[0101] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for preparing an aluminum alloy cable, characterized in that: The following steps are involved: (1) Aluminum alloy cable includes a cable core material and a protective layer. The cable core material, calculated by weight, includes 2.5 parts of copper, 0.3 parts of magnesium, 0.5 parts of titanium, 0.5 parts of nickel, 0.3 parts of cadmium, 0.1 parts of cobalt, 1.2 parts of zinc, 0.2 parts of platinum, 0.5 parts of silver, and 96 parts of aluminum. The protective layer includes an armor layer and an outer sheath. The armor layer is an aluminum alloy strip, and the outer sheath is made of glass fiber reinforced PVC composite material. The raw materials of the cable core material components are placed in a high-temperature melting furnace and smelted at 850-880℃ under stirring. After the raw materials are melted, refining agents are added for refining. The refining agents are sodium fluorosilicate and cryolite. The refining temperature is 750-790℃ and the time is 45-90min. After the refining is completed, the raw materials are degassed and allowed to stand until the oxidized slag fully floats and is then removed. (2) The casting was carried out by semi-continuous water cooling, the temperature of the semi-continuous water cooling casting was 750-780°C, the speed was 100 mm / min, the cooling water pressure was 0.35 MPa, and the water flow rate was 2200 L / min to obtain a cast billet; (3) The ingot obtained in step (2) is homogenized and then placed in a high-temperature calcining furnace for forging. The ingot after forging is placed in a continuous rolling mill to be rolled into a round aluminum rod, which is then coiled and a compacting process is used to obtain a compacted coil. The compacting coefficient of the compacting process is controlled to be 0.

92. (4) The coil obtained in step (3) is placed in an extruder for extrusion molding to obtain a cross-sectional area of ​​2.5 mm 2 The wire is then placed in a wire drawing machine at a drawing rate of 5 m / min. After drawing and aging treatment, a cross-sectional area of ​​1.5 mm is obtained. 2 Aluminum alloy core material; (5) coating the aluminum alloy core material with an insulation layer to obtain a cable core coated with an insulation layer; (6) Pre-pressing the aluminum alloy strip into an "S"-shaped curved surface, wrapping it clockwise around the surface of the cable core with the insulating layer prepared in step (5) as the center, and buckling them together to form a self-locking armor protection layer; (7) The glass fiber reinforced PVC composite material is made into an outer sheath, and after cooling treatment, the cable core and the outer sheath are assembled to obtain an aluminum alloy cable.

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