Unlock instant, AI-driven research and patent intelligence for your innovation.

An electrode structure with uniform and stable arcing characteristics and its preparation technology

An electrode and arcing technology, which is applied in the composite electrode of various metals and its preparation field, can solve problems such as poor thermal conductivity, achieve the effects of prolonging service life, ensuring strong interface bonding, and low electrode ablation rate

Active Publication Date: 2022-07-22
ZHEJIANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the thermal conductivity of metals with the characteristics of oxide liquid film arc combustion is usually poor, less than one-twentieth of that of pure copper

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An electrode structure with uniform and stable arcing characteristics and its preparation technology
  • An electrode structure with uniform and stable arcing characteristics and its preparation technology
  • An electrode structure with uniform and stable arcing characteristics and its preparation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, a copper-based heterogeneous layered structure electrode is prepared, which is composed of a zirconia layer, a zirconia-zirconium dual-phase layer, a zirconium surface layer, a niobium-copper transition layer and a pure copper matrix from the surface to the inside. In the actual service environment of the electrode, the stable arc current is 52A, and the cathode arcing area is a circle with a diameter of about 4.5mm. The total power of the fiber laser of the high-speed laser cladding platform used for copper surface laser cladding is 3000W, and the power is continuously adjustable. The used niobium powder and zirconium powder have a purity higher than 99.5 percent, a powder particle size of 300-500 mesh, and are used after vacuum drying.

[0049] During cladding, the laser power adjustment range is 1500-2250W, the working distance (that is, the distance between the cladding head and the surface of the cladding layer) is 13-16mm, and the niobium powder a...

Embodiment 2

[0079] In the heterogeneous layered electrode structure involved in this embodiment, the transition layer is a copper-chromium coating or a copper-iron coating. The upper surface needs to have a certain formability to ensure the smoothness of the cladding surface after the zirconium layer is clad.

[0080] Starting from the pure copper substrate, after laser cladding and arc ablation, the prepared heterogeneous layered electrode structure is zirconia layer, zirconia-zirconium dual-phase layer, zirconium layer, chromium / iron-copper from the surface to the inside Transition layer and pure copper base. The stable arc current in the actual service environment of the electrode is 32A. The used chromium powder, iron powder and zirconium powder have a purity higher than 99.5%, and the mesh number is 200-300 mesh.

[0081] During cladding, the laser power adjustment range is 1500-2250W, the working distance is 13-16mm, and the chromium / iron powder and zirconium powder are installed ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
hardnessaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses an electrode structure with uniform and stable arc combustion characteristics. The electrode structure includes a zirconia layer, a zirconia-zirconium dual-phase layer, a zirconium surface layer, a transition layer and a pure copper matrix from the outside to the inside; ‑Zirconium dual-phase layer is formed by the aggregation of zirconium oxide and metal zirconium; the zirconium surface layer is composed of zirconium and a small amount of other metals; the transition layer is a heterogeneous structure composed of copper and various heterogeneous metals; Arc ablation technique is formed by in-situ oxidation. The invention also discloses a preparation method of the electrode. The preparation method includes two processes of laser cladding and in-situ arc ablation. On the basis of the arc ablation resistance of the surface layer and the high electrical and thermal conductivity of the substrate, the electrode ensures strong interface bonding, and achieves a more sustainable low electrode ablation rate and a more stable electrode structure than the mechanically embedded cathode structure. , help to prolong the service life of the electrode.

Description

technical field [0001] The invention relates to an electrode of an arc discharge device, in particular to a composite electrode of multiple metals and a preparation method thereof. Background technique [0002] Ablation is an unavoidable electrode failure process in arc plasma applications. During arc discharge, the two ends of the arc are carried on the surface of the cathode and the anode, respectively, and the ionization of neutral molecules continues in the arc column. Under very high heat input at the arc root (heat flux density, 10 5 ~10 8 W / m 2 ), the electrodes are ablated in the form of melt sputtering, evaporation, boiling, etc. Compared with the anode, the cathode is subjected to high-speed bombardment of cations with higher mass, and the ablation process is more serious. In order to conduct the heat input that consumes the arc root as much as possible, some arc plasma applications use pure copper as the electrode material, such as arc heaters. However, unde...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/34H05H1/48
CPCH05H1/34H05H1/48
Inventor 王宏涛关慰勉方攸同刘嘉斌
Owner ZHEJIANG UNIV