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Efficient multilayer composite electrode wire and preparation method thereof

A multi-layer composite, electrode wire technology, applied in the direction of electrode manufacturing, electric processing equipment, manufacturing tools, etc., can solve the problems of unsatisfactory cutting speed, poor cutting stability, multiple phases disorder, etc., to achieve comprehensive cutting. Low cost, improved cutting efficiency, good versatility

Inactive Publication Date: 2012-07-04
NINGBO BODE HIGHTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Later, people tried to coat a layer of brass on the outside of the brass wire, and adjusted the ratio of copper and zinc in the coated brass, which solved the problem of excessive zinc consumption to a certain extent, but due to the presence of α in the coated brass , β, β′, γ and other phases, and the post-heat treatment cannot greatly change its structure, there will be a variety of phases in disorder, resulting in poor stability during cutting, difficulty in improving the precision of the workpiece, and the cutting speed cannot reach the ideal Effect

Method used

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  • Efficient multilayer composite electrode wire and preparation method thereof
  • Efficient multilayer composite electrode wire and preparation method thereof
  • Efficient multilayer composite electrode wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A core wire 1 with a diameter of 0.6mm is selected, and a layer of copper metal coating 2 with a thickness of 3 μm is electroplated on the core wire according to a conventional method, and then a layer of zinc metal coating 3 with a thickness of 9 μm is electroplated on the copper metal coating 2 , to obtain the first wire blank 4. Such as figure 1 and figure 2 shown.

[0038] Diffusion annealing treatment is performed on the first wire blank, the diffusion annealing temperature is 450° C., and the diffusion annealing time is 20 seconds. The changes of the metallographic structure of the core wire and the two metal coatings during the diffusion annealing process are as follows: Figure 3 to Figure 7 shown.

[0039] in image 3 After the diffusion annealing starts, the interdiffusion between the copper metal coating and the zinc metal coating forms β, β′, γ and other tissue layers 7 . With increasing annealing time, as Figure 4 As shown, the continuous diffusion...

Embodiment 2

[0047] A core wire with a diameter of 0.8 mm is selected, and a copper metal coating with a thickness of 3 μm and a zinc metal coating with a thickness of 9 μm are sequentially electroplated to obtain a first wire blank.

[0048] Diffusion annealing treatment is performed on the first wire blank, the diffusion annealing temperature is 475° C., and the diffusion annealing time is 15 seconds.

[0049] After the diffusion annealing, the second wire billet is water-cooled, and the cooling temperature is 50°C.

[0050] The second wire billet was subjected to continuous drawing and continuous annealing processing to produce a high-efficiency multilayer composite electrode wire with a diameter of 0.15 mm and a thickness of the foreskin of 2.25 μm.

[0051] The scanning electron microscope photo of the high-efficiency multilayer composite electrode wire is as follows: Figure 9 As shown, the mass percentage of the metal at the surface layer is Cu: 29.4%, Zn: 70.6%.

[0052] Its comp...

Embodiment 3

[0054] A core wire with a diameter of 1.0 mm was selected, and a copper metal coating with a thickness of 5 μm and a zinc metal coating with a thickness of 6 μm were electroplated sequentially from the inside to the outside to obtain the first wire blank.

[0055] Diffusion annealing treatment is performed on the first wire blank, the diffusion annealing temperature is 500° C., and the diffusion annealing time is 10 seconds.

[0056] After the diffusion annealing, the second wire billet is water-cooled, and the cooling temperature is 40°C.

[0057] The second wire billet is subjected to continuous drawing and continuous retreat processing to produce a high-efficiency multi-layer composite electrode wire with a diameter of 0.3 mm and a thickness of the foreskin of 3.3 μm.

[0058] The scanning electron microscope photo of the high-efficiency multilayer composite electrode wire is as follows: Figure 10 As shown, the mass percentage of metal at the surface layer is Cu: 27.6%, Z...

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Abstract

The invention relates to an efficient multilayer composite electrode wire, which comprises a core part and a wrapper wrapped on the core part. The electrode wire is characterized in that: the core part is provided with a brass wire core formed by performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment on a brass core wire, and the metallographic structure of the brass wire core is mainly an alpha-phase structure; and the wrapper is a diffused alloy layer formed by performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment on a copper metal coating and a zinc metal coating which are sequentially plated on the brass core wire, and the metallographic structure of the diffused alloy layer is mainly a beta-phase structure. The electrode wire is prepared by the following steps of: plating the copper and zinc metal coatings on the core wire, then performing diffusion annealing, water cooling and continuous drawing and continuous retracting treatment, drawing, and thus obtaining the electrode wire. Compared with the prior art, the invention has the advantages that: the cutting efficiency of the efficient multilayer composite electrode wire is remarkably higher than that of a common galvanized wire, the comprehensive cutting cost of the efficient multilayer composite electrode wire is lower than that of the common galvanized wire, and the efficient multilayer composite electrode wire has good universality.

Description

technical field [0001] The invention relates to an electrode wire for electrical discharge machining and a preparation method thereof, in particular to an electrode wire for electrical discharge machining with a composite coating and a preparation method thereof. Background technique [0002] EDM is an indispensable processing method in the mold manufacturing and metal processing industries. Improving the efficiency of EDM has always been the focus of its technological innovation. Electrode wire, as an important consumable in EDM, has received more and more attention. According to the application, the commonly used electrode wires with coatings on the market are as follows: 1. Ordinary galvanized electrode wires: the core material is brass, and the coating is pure zinc. 2. Improved galvanized electrode wire: the core material is brass, and the coating is copper-zinc alloy. 3. Diffusion annealed electrode wire: the core material is pure copper, which is coated with a layer ...

Claims

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Application Information

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IPC IPC(8): B23H7/22B23H7/24B23H7/08
Inventor 赵勇陈小军钟杰吕和宁顾洪方
Owner NINGBO BODE HIGHTECH CO LTD
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