Processing method for improving conductivity and mechanical property of copper alloy wire

Abstract

The invention relates to a processing method for improving conductivity and mechanical property of a copper alloy wire, which comprises the following steps: 1) preparing raw materials, cleaning the raw materials, and respectively putting the raw materials into a smelting furnace for smelting to obtain a brass solution, an alloy solution and a red copper solution; (2) pouring the brass solution and the alloy solution into continuous casting equipment together to cast a brass alloy blank rod; (3) the red copper solution is poured into the brass alloy blank rod, and a copper alloy wire blank with the diameter phi being 4.0 mm is manufactured after heavy drawing and annealing; (4) carrying out medium drawing and on-line annealing on the copper alloy wire blank by using a medium drawing machine, and drawing the copper alloy wire blank into a copper alloy wire blank with the diameter of 2.0 mm; 5) carrying out acid water washing on the copper alloy wire blank; (6) carrying out annealing treatment in a bell-type furnace; and 7) performing small drawing on the annealed copper alloy wire blank by using a small drawing machine to obtain a finished copper alloy wire with the diameter of 0.1-0.4 mm. Compared with the prior art, the method has the advantages that the manufacturing process is simple, and the conductivity and the mechanical property are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper alloy wire conductive processing and manufacturing, in particular to a processing method for improving the conductive performance and mechanical properties of the copper alloy wire. Background Art

[0002] Copper alloy wire is widely used in various fields, including automobiles, aerospace, electronic communications, etc. due to its excellent conductivity and mechanical properties.

[0003] With the development of science and technology, the performance requirements of copper alloy wires in various fields are getting higher and higher, requiring better conductivity and mechanical properties, so as to play a better conductor effect, not easy to damage or break, and have a longer service life. However, due to the influence of production technology, the current copper alloy wires have gradually failed to meet the requirements of high performance. Therefore, it is urgent to improve the processing technology of copper alloy wires to meet the production needs of high-performance copper alloy wires. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a processing method for improving the electrical conductivity and mechanical properties of copper alloy wire.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire, the processing method comprising the following steps:

[0007] 1) preparing brass raw materials, alloy materials and copper raw materials respectively, cleaning the three raw materials and placing them in three smelting furnaces for smelting respectively to obtain brass solution, alloy solution and copper solution;

[0008] 2) pouring the brass solution and the alloy solution into a continuous casting device together, and casting a brass alloy embryonic rod at a pulling speed of 1.0-1.1 m / min;

[0009] 3) Pour the copper solution into the brass alloy embryo rod, and make it into a Φ4.0 mm copper alloy wire embryo after large drawing and annealing. The drawing speed of the large drawing machine is 380-395 m / min, and the annealing coefficient is 1.2±0.03;

[0010] 4) using a medium drawing machine to perform medium drawing and online annealing on the copper alloy wire embryo to draw into a copper alloy wire embryo of Φ2.0 mm, the drawing speed of the medium drawing machine is controlled at 580 m / min, and the annealing coefficient is 1.3±0.03;

[0011] 5) washing the copper alloy wire embryo with acid water;

[0012] 6) putting the acid-washed copper alloy wire embryo into a bell furnace for annealing at a temperature of 210-240° C. for a holding time of 3.5-4.0 h;

[0013] 7) The annealed copper alloy wire embryo is subjected to small drawing by a small drawing machine to obtain a finished copper alloy wire of Φ0.1-Φ0.4 mm, the drawing speed of the small drawing machine is 900±5 m / min, and the annealing coefficient is 1.4±0.03.

[0014] Furthermore, the cleaning includes surface peeling treatment and cleaning treatment after peeling of the brass raw material, the alloy material and the copper raw material.

[0015] Furthermore, the peeling process specifically includes: using a sanding wheel to remove the skin layer on the surface of the raw material.

[0016] Furthermore, the cleaning process is specifically: using pure water to continuously rinse the three raw materials after peeling for three times.

[0017] Furthermore, the alloy material includes Fe, Zn, Mn and Si, with the proportions being 0.01% Fe, 0.01% Mn, 0.02% Si and the balance Zn.

[0018] Furthermore, the smelting temperature is 1000°C to 1200°C.

[0019] Furthermore, the acid washing includes pickling and water washing; the pickling uses sulfuric acid, the volume ratio of sulfuric acid to the pickling solution is 10%, and the temperature of the pickling solution is room temperature; the liquid used in the water washing is pure water, and the copper alloy wire embryo is rinsed four times in succession using pure water.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The present invention can significantly improve the mechanical properties of the copper alloy wire by covering the surface of the brass alloy with a layer of red copper, and both the fracture resistance and the toughness are significantly improved; and through multiple continuous stretching and annealing, and through the temperature control of each stretching and annealing, the obtained Φ0.1-Φ0.4mm finished copper alloy wire has significantly improved electrical conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a flow chart of the processing method. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] Example

[0030] like Figure 1 As shown, a processing method for improving the electrical conductivity and mechanical properties of copper alloy wire, the processing method comprises the following steps:

[0031] 1) Prepare brass raw materials, alloy materials and copper raw materials respectively, clean the three raw materials and place them in three smelting furnaces for smelting respectively to obtain brass solution, alloy solution and copper solution; the cleaning includes peeling the surface of the brass raw materials, alloy materials and copper raw materials and cleaning after peeling; the peeling treatment is specifically: using a sanding wheel to remove the skin layer on the surface of the raw materials, the purpose is to ensure that the surface of the raw materials is smooth and free of impurities such as oxidation, which affects the performance of the copper alloy wire; the cleaning treatment is specifically: using pure water to rinse the three raw materials after peeling for three consecutive times; the alloy material includes Fe, Zn, Mn and Si, accounting for: 0.01% Fe, 0.01% Mn, 0.02% Si and the remainder Zn; the smelting temperature is 1000℃~1200℃.

[0032] 2) Pour the brass solution and the alloy solution into the continuous casting equipment together, and cast the brass alloy embryo rod at a pulling speed of 1.0-1.1m / min.

[0033] 3) Pour the copper solution into the brass alloy embryo rod, and make it into a Φ4.0mm copper alloy wire embryo after large drawing and annealing. The drawing speed of the large drawing machine is 380-395m / min, and the annealing coefficient is 1.2±0.03. Covering a layer of copper on the surface of the brass alloy can significantly improve the mechanical properties of the copper alloy wire, and the fracture resistance and toughness are significantly improved.

[0034] 4) The copper alloy wire embryo is intermediately drawn and annealed online using an intermediate drawing machine to be stretched into a copper alloy wire embryo of Φ2.0 mm. The stretching speed of the intermediate drawing machine is controlled at 580 m / min, and the annealing coefficient is 1.3±0.03.

[0035] 5) The copper alloy wire embryo is acid-washed; the acid-washing includes pickling and water washing; the pickling uses sulfuric acid, the volume ratio of sulfuric acid to the pickling solution is 10%, and the temperature of the pickling solution is room temperature; the liquid used in the water washing is pure water, and the copper alloy wire embryo is rinsed four times in succession with pure water to ensure that it is clean and free of impurities.

[0036] 6) The acid-washed copper alloy wire embryo is put into a bell furnace for annealing at a temperature of 210-240° C. and a holding time of 3.5-4.0 h.

[0037] 7) Use a small drawing machine to draw the annealed copper alloy wire embryo to obtain a finished copper alloy wire of Φ0.1-Φ0.4mm. The drawing speed of the small drawing machine is 900±5m / min, and the annealing coefficient is 1.4±0.03. Through continuous drawing and annealing processes, the size of the copper alloy wire becomes smaller and smaller, and the conductive performance becomes stronger and stronger.

[0038] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A processing method for improving the electrical conductivity and mechanical properties of copper alloy wire, characterized in that: The processing method comprises the following steps: 1) preparing brass raw materials, alloy materials and copper raw materials respectively, cleaning the three raw materials and placing them in three smelting furnaces for smelting respectively to obtain brass solution, alloy solution and copper solution; 2) pouring the brass solution and the alloy solution into a continuous casting device together, and casting a brass alloy embryonic rod at a pulling speed of 1.0-1.1 m / min; 3) Pour the copper solution into the brass alloy embryo rod, and make it into a Φ4.0 mm copper alloy wire embryo after large drawing and annealing. The drawing speed of the large drawing machine is 380-395 m / min, and the annealing coefficient is 1.2±0.03; 4) using a medium drawing machine to perform medium drawing and online annealing on the copper alloy wire embryo to draw into a copper alloy wire embryo of Φ2.0 mm, the drawing speed of the medium drawing machine is controlled at 580 m / min, and the annealing coefficient is 1.3±0.03; 5) washing the copper alloy wire embryo with acid water; 6) putting the acid-washed copper alloy wire embryo into a bell furnace for annealing at a temperature of 210-240° C. for a holding time of 3.5-4.0 h; 7) The annealed copper alloy wire embryo is subjected to small drawing by a small drawing machine to obtain a finished copper alloy wire of Φ0.1-Φ0.4 mm, the drawing speed of the small drawing machine is 900±5 m / min, and the annealing coefficient is 1.4±0.

03.

2. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 1, characterized in that: The cleaning includes peeling the surface of the brass raw material, the alloy material and the copper raw material and cleaning the surface after peeling.

3. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 2, characterized in that: The peeling process specifically includes: using a sanding wheel to remove the skin layer on the surface of the raw material.

4. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 3, characterized in that: The cleaning process specifically includes: using pure water to continuously rinse the three raw materials after peeling for three times.

5. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 1, characterized in that: The alloy material includes Fe, Zn, Mn and Si, with the proportions being 0.01% Fe, 0.01% Mn, 0.02% Si and the balance Zn.

6. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 1, characterized in that: The smelting temperature is 1000°C to 1200°C.

7. A processing method for improving the electrical conductivity and mechanical properties of a copper alloy wire according to claim 1, characterized in that: The acid washing includes pickling and water washing; the pickling uses sulfuric acid, the volume ratio of sulfuric acid to the pickling solution is 10%, and the temperature of the pickling solution is room temperature; the liquid used in the water washing is pure water, and the copper alloy wire embryo is rinsed four times continuously with pure water.

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