MANUFACTURING METHOD OF TEXTURED AND COATED ELECTRODE WIRE

Abstract

A manufacturing method of a textured and coated electrode wire, comprising: selecting a copper-zinc alloy as a core material, preparing, by means of electroplating/hot-dipping, a metal zinc coating on a surface of the wire material, then performing pre-treatment on the coated electrode wire by means of discontinuous diffusion annealing to obtain a coated electrode wire material having a multi-layer structure of Zn/β-Cu γ-Cu/α-Cu, and then using multiple cold drawing treatments and a stress-relief annealing treatment to modify the electrode wire and obtain a textured and coated electrode wire material. Compared to conventional copper alloy electrode wires and zinc-coated electrode wires, the material has advantages of a fast cutting speed, low cutting cost, low environmental pollution, etc., wherein the cutting speed increases by 12% or more when compared with copper alloy electrode wire, the wire breakage rate during cutting processes decreases by 30%, and the replacement time interval of an ion-exchange resin filter for cooling water increases by 10%.

Claims

1. A method of preparing a textured coated electrode wire, comprising the following steps: step (1), preparing a metal zinc plating layer on the surface of a copper-zinc alloy electrode wire by electroplating/hot dip plating; step (2), pre-drawing the galvanized electrode wire blank by a cold drawing technique; step (3), forming a coated electrode wire having a multilayer structure of Zn/β-Cu γ-Cu/α-Cu by a discontinuous heat treatment technique; and step (4), preparing a micro-textured electrode wire by cold drawing, and obtaining a plated electrode wire material having a regular texture by controlling the process of the electroplating/the hot dip plating, the discontinuous heat treatment technique, and the cold drawing technique, wherein the obtained plated electrode wire has regular strip cracks on its surface.

2. The method of preparing a textured coated electrode wire according to claim 1, wherein step (1) comprises selecting a copper-zinc alloy having a diameter of 1.0 mm to 1.5 mm as a core material, after the post-treatment of removing the oil, removing the rust and cleaning, and depositing a metal plating layer on the surface of the copper-zinc alloy wire by electroplating/hot dip plating technology, and the plated electrode wire material having different plated thickness is obtained by adjusting the preparation process.

3. The method of preparing a textured coated electrode wire according to claim 1, wherein step (2) comprises selecting the plated electrode wire obtained in step (1) as a starting material, and pre-drawing by a cold drawing technique so as to obtain an electrode wire blank having a diameter of 0.5 mm to 1.0 mm.

4. The method of preparing a textured coated electrode wire according to claim 1, wherein step (3) comprises selecting the plated electrode wire obtained in step (2) as a starting material, placing into vacuum/inert heating furnace, and diffusion treating the electrode wire by two-stage or multi-stage temperature gradient, and the electrode wire blank with Zn/β-Cu γ-Cu/α-Cu multilayer structure is formed by adjusting parameters of the processing temperature and the processing time.

5. The method of preparing a textured coated electrode wire according to claim 1, wherein step (4) comprises selecting the electrode wire blank with multilayer structure obtained in step (3) as a starting material and drawing at a certain speed, and the plated electrode wire material having a diameter of 0.15 mm to 0.5 mm and having a textured structure is formed from the electrode wire blank with Zn/β-Cu γ-Cu /α-Cu multilayer structure and different elongations by adjusting parameters of the drawing pass, the drawing diameter ratio and the drawing speed.

6. The method of preparing a textured coated electrode wire according to claim 2, wherein step (1) comprises selecting a copper-zinc alloy as a core material, after removing the oil, removing the rust and cleaning, and preparing a galvanized layer on the surface of the copper alloy wire by electroplating/hot dip plating technology, and the wire blank having a zinc layer thickness of 2 μm to 20 μm is obtained by adjusting the plating current, the voltage and the time as well as the dip plating process.

7. The method of preparing a textured coated electrode wire according to claim 3, characterized in that step (2) comprises selecting the galvanized electrode wire blank obtained in step (1) as a starting material, and preparing the electrode wire blank having a diameter of 0.5 mm to 1.0 mm by controlling parameters of the drawing pass, the diameter ratio before and after drawing and the drawing speed.

8. The method of preparing a textured coated electrode wire according to claim 4, wherein step (3) comprises selecting a vacuum and inert atmosphere furnace and discontinuous thermal diffusion treating the pre-drawed electrode wire blank obtained in step (2), wherein the treatment process is a two-stage or multi-stage thermal diffusion treatment, specifically, a bell-type vacuum heat treatment furnace is used during the thermal diffusion process, and the treatment process is thermal diffusion treatment at 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 80-500 minutes.

9. The method of preparing a textured coated electrode wire according to claim 8, wherein step (3) comprises selecting a bell-type vacuum heat treatment furnace during the thermal diffusion treatment, and the treatment process is thermal diffusion treatment at 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 80-500 minutes.

10. The method of preparing a textured coated electrode wire according to claim 5, wherein step (4) comprises selecting the wire blank with multilayer structure obtained in step (3), and drawing above wire into a micro-textured electrode wire of 0.15 mm to 0.5 mm by a drawing treatment of 5 passes at a drawing speed of 600 m/min to 1500 m/min, followed by a stress relief annealing treatment at a voltage of 20 to 50 V and a current of 5 to 30 A, thus obtaining an electrode wire having a textured coating.

Description

DESCRIPTION OF FIGURES

[0030] FIG. 1 is a schematic view showing the preparation process of the textured plating electrode wire in Example 1;

[0031] FIG. 2 is a diagram showing the microstructure and the composition of the wire blank having a multilayer structure in Example 1;

[0032] FIG. 3 is a surface topographical view of the plated electrode wire with a transversely texture in Example 1;

[0033] FIG. 4 is a graph showing the comparison of the cutting speeds of different electrode wires in Example 1.

DETAILED DESCRIPTION OF THE INVENTION

[0034] The invention will now be further described with reference to the drawings and embodiments.

EXAMPLE 1

[0035] As shown in FIGS. 1-4, the method of preparing the textured coated electrode wire provided in this example was carried out according to the following steps:

[0036] Step (1), preparing a zinc plating layer on the surface of the copper-zinc alloy core material: firstly, the cleaned zinc alloy core material (Cu/Zn: 60/40) was subjected to electroplating/hot dip plating treatment, and a zinc plating having a thickness of 5 μm was obtained by adjusting the galvanizing process;

[0037] Step (2), pre-drawing treatment: selecting the above-mentioned plating electrode wire as a starting material, and performing pre-drawing treatment by cold drawing technology to obtain a electrode wire blank having a diameter of 0.5 mm;

[0038] Step (3), diffusion heat treatment: the electrode wire blank obtained in step (2) was subjected to diffusion heat treatment by a discontinuous heat treatment method, and a process of 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 250 minutes was selected for thermal diffusion treatment. After thermal diffusion, the zinc plating layer and the copper-zinc alloy core material underwent an interdiffusion reaction to form an electrode wire blank having a Zn/β-Cu γ-Cu/α-Cu multilayer structure;

[0039] Step (4), cold drawing treatment: selecting the wire blank having a multilayer structure treated by the diffusion heat treatment in step (3), and drawing the above-mentioned wire into a micro-texture electrode wire of 0.3 mm at a drawing speed of 1000 m/min. The wire was then subjected to stress relief annealing at a voltage of 30 V and a current of 10 A to obtain a textured plated electrode wire.

[0040] The textured plated electrode wire obtained by the method of preparing the textured plated electrode wire provided in the example has regular transverse cracks and a certain microporosity.

[0041] Data analysis: FIG. 2 is a schematic structural view and a micrograph of the wire blank having a multi-layer structure in the example, and it can be seen that the wire blank has a three-layer structure; FIG. 3 is a surface topography of the plated electrode wire having a horizontal texture in the example, and it can be seen that the electrode wire has regular transverse cracks; FIG. 4 is a comparison chart of the cutting speed of different electrode wires, and it can be seen that the cutting speed of the electrode wire in the example is 12.35% faster than that of the brass wire, which is obviously advantageous.

[0042] At the same time, the electrode wire coating provided by this example has a regular transverse texture, which gives the electrode wire material a better cooling effect and a higher cutting rate, and significantly improves the performance of the electrode wire, for example, compared with the galvanized wire, the cutting speed is increased by more than 12%, the number of cutting breaks is reduced by 30%, and the replacement time of the cooling water ion resin filter is extended by 10%.

[0043] The cross-sectional structure of the textured coated electrode wire is a copper-zinc alloy core material and a regular transversely textured galvanized layer structure. The textured galvanized electrode wire has a tensile strength of 900 MPa to 1200 MPa and an elongation of 1% to 5%. The contact angle of the textured coating electrode wire with water is about 120°, which is significantly higher than that of the galvanized wire, thereby increasing the cooling effect of water. The number of times of cutting break of the textured coating electrode wire is 30% lower than that of the galvanized wire, and the replacement time of the cooling water ion resin filter is extended by 10%.

EXAMPLE 2

[0044] The method of preparing the textured coated electrode wire provided in this example was carried out according to the following steps:

[0045] Step (1), preparing a zinc plating layer on the surface of the copper-zinc alloy core material: firstly, the cleaned zinc alloy core material (Cu/Zn: 60/40) was subjected to electroplating/hot dip plating treatment, and a zinc plating having a thickness of 10 μm was obtained by adjusting the galvanizing process;

[0046] Step (2), pre-drawing treatment: selecting the above-mentioned plating electrode wire as a starting material, and performing pre-drawing treatment by cold drawing technology to obtain a electrode wire blank having a diameter of 0.8 mm;

[0047] Step (3), diffusion heat treatment: the electrode wire blank obtained in step (2) was subjected to diffusion heat treatment by a discontinuous heat treatment method, and a process of 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 300 minutes was selected for thermal diffusion treatment. After thermal diffusion, the zinc plating layer and the copper-zinc alloy core material underwent an interdiffusion reaction to form an electrode wire blank having a Zn/β-Cu γ-Cu/α-Cu multilayer structure;

[0048] Step (4), drawing treatment: selecting the wire blank having a multilayer structure treated by the diffusion heat treatment in step (3), and drawing the above-mentioned wire into a micro-texture electrode wire of 0.3 mm at a drawing speed of 1000 m/min. The wire was then subjected to stress relief annealing at a voltage of 30 V and a current of 10 A to obtain a textured plated electrode wire.

[0049] The textured plated electrode wire obtained by the method of preparing the textured plated electrode wire provided in the example has regular transverse cracks and a certain microporosity.

[0050] It has been tested that the cutting speed of the electrode wire in this example is 12.17% faster than that of the brass wire, which is obviously advantageous.

EXAMPLE 3

[0051] The method of preparing the textured coated electrode wire provided in this example was carried out according to the following steps:

[0052] Step (1), preparing a zinc plating layer on the surface of the copper-zinc alloy core material: firstly, the cleaned zinc alloy core material (Cu/Zn: 63/37) was subjected to electroplating/hot dip plating treatment, and a zinc plating having a thickness of 5 μm was obtained by adjusting the galvanizing process;

[0053] Step (2), pre-drawing treatment: selecting the above-mentioned plating electrode wire as a starting material, and performing pre-drawing treatment by cold drawing technology to obtain a electrode wire blank having a diameter of 0.5 mm;

[0054] Step (3), diffusion heat treatment: the electrode wire blank obtained in step (2) was subjected to diffusion heat treatment by a discontinuous heat treatment method, and a process of 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 400 minutes was selected for thermal diffusion treatment. After thermal diffusion, the zinc plating layer and the copper-zinc alloy core material underwent an interdiffusion reaction to form an electrode wire blank having a Zn/β-Cu γ-Cu/α-Cu multilayer structure;

[0055] Step (4), drawing treatment: selecting the wire blank having a multilayer structure treated by the diffusion heat treatment in step (3), and drawing the above-mentioned wire into a micro-texture electrode wire of 0.15 mm at a drawing speed of 1000 m/min. The wire was then subjected to stress relief annealing at a voltage of 50 V and a current of 30 A to obtain a textured plated electrode wire.

[0056] The textured plated electrode wire obtained by the method of preparing the textured plated electrode wire provided in the example has regular transverse cracks and a certain microporosity.

[0057] It has been tested that the cutting speed of the electrode wire in this example is 12.85% faster than that of the brass wire, which is obviously advantageous.

EXAMPLE 4

[0058] The method of preparing the textured coated electrode wire provided in this example was carried out according to the following steps:

[0059] Step (1), preparing a zinc plating layer on the surface of the copper-zinc alloy core material: firstly, the cleaned zinc alloy core material (Cu/Zn: 65/35) was subjected to electroplating/hot dip plating treatment, and a zinc plating having a thickness of 8 μm was obtained by adjusting the galvanizing process;

[0060] Step (2), pre-drawing treatment: selecting the above-mentioned plating electrode wire as a starting material, and performing pre-drawing treatment by cold drawing technology to obtain a electrode wire blank having a diameter of 0.5 mm;

[0061] Step (3), diffusion heat treatment: the electrode wire blank obtained in step (2) was subjected to diffusion heat treatment by a discontinuous heat treatment method, and a process of 150° C. to 200° C. and 300° C. to 400° C. two-stage temperature for 500 minutes was selected for thermal diffusion treatment. After thermal diffusion, the zinc plating layer and the copper-zinc alloy core material underwent an interdiffusion reaction to form an electrode wire blank having a Zn/β-Cu γ-Cu/α-Cu multilayer structure;

[0062] Step (4), drawing treatment: selecting the wire blank having a multilayer structure treated by the diffusion heat treatment in step (3), and drawing the above-mentioned wire into a micro-texture electrode wire of 0.2 mm at a drawing speed of 1000 m/min. The wire was then subjected to stress relief annealing at a voltage of 20 V and a current of 5 A to obtain a textured plated electrode wire.

[0063] The textured plated electrode wire obtained by the method of preparing the textured plated electrode wire provided in the example has regular transverse cracks and a certain microporosity.

[0064] It has been tested that the cutting speed of the electrode wire in this example is 12.58% faster than that of the brass wire, which is obviously advantageous.

[0065] It is to be understood that the above-described examples are merely illustrative of the technical concept and the features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the present invention, which does not limit the protection scope of the present invention. Equivalent variations or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.