Welding powder special for efficient connection of aluminum hinge line

A welding powder and hinged wire technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of unfavorable power engineering grounding system development, easy to be controlled by people, easy to produce pores, etc., to speed up the displacement reaction rate , high safety, not easy to be oxidized

Active Publication Date: 2019-10-25
JIAXING JIAHE ELECTRIC POWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, defects such as pores, slag inclusions, and hot cracks are prone to occur when the existing thermite welding powder is used to weld aluminum hinge materials. The quality of foreign special welding powder welding joints is reliable, but the cost is high, and it is easy to be controlled by others. Long-term use is not conducive to the grounding of my country's electric power projects. system development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A special solder powder for high-efficiency connection of aluminum hinged wires. The solder powder is composed of the following components in weight percentage: 65% aluminum, 30% tin oxide, 1% tin, 0.4% iron, 0.2% carbon, 0.2% rare earth, and 0.2% silver %, 2% borax; the alloy powder is composed of the following components by weight percentage: calcium 10%, silicon 45%, barium 30%.

[0029] The mixed powder is composed of the following materials in parts by weight: 1 part of iron powder, 1.5 parts of fluorite powder, 0.5 part of ferrosilicon powder, 1 part of silicon dioxide, 3 parts of slagging agent and 2 parts of binder.

[0030] The slagging agent is fluorite powder, and the aluminum powder is flake atomized aluminum powder with a particle size of 40-60 mesh.

[0031] The hardness of the welding layer is 205HB.

Embodiment 2

[0033] A special solder powder for high-efficiency connection of aluminum hinged wires. The solder powder is composed of the following components in weight percentage: 66.4% aluminum, 31% tin oxide, 0.8% tin, 0.5% iron, 0.1% carbon, 0.1% rare earth, and 0.1% silver %, borax 1%; the alloy powder is composed of the following components in weight percentage: calcium 12%, silicon 46%, barium 31%.

[0034] The mixed powder is composed of the following materials in parts by weight: 1.2 parts of iron powder, 1 part of fluorite powder, 0.4 part of ferrosilicon powder, 0.8 part of silicon dioxide, 4 parts of slagging agent and 3 parts of binder.

[0035] The hardness of the welding layer is 208.8HB.

Embodiment 3

[0037] A special solder powder for high-efficiency connection of aluminum hinge wire. The solder powder is composed of the following components in weight percentage: 67.4% of aluminum, 30% of tin oxide, 0.9% of tin, 0.4% of iron, 0.1% of carbon, 0.1% of rare earth, and 0.1% of silver %, borax 1%; the alloy powder is composed of the following components in weight percentage: calcium 8%, silicon 42%, barium 29%.

[0038] The mixed powder consists of the following materials in parts by weight: 1.5 parts of iron powder, 1.2 parts of fluorite powder, 0.4 part of ferrosilicon powder, 0.9 part of silicon dioxide, 3 parts of slagging agent and 1 part of binder.

[0039] The present invention adopts the DML-V02B plasma powder butt welding machine produced by Shanghai Duomu Industrial Co., Ltd. to carry out surfacing welding; The speed is 1mm / s, and it is fully and uniformly stirred and mixed.

[0040] The hardness of the welding layer is 210.7HB.

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Abstract

The invention relates to welding powder special for efficient connection of an aluminum hinge line. The welding powder is composed of matter including, by weight percent, 65 to 68% of aluminum, 30 to35% of tin oxide, 0.8 to 1.2% of tin, 0.4 to 0.6% of iron, 0.1 to 0.3% of carbon, 0.1 to 0.3% of rare earth, 0.1 to 0.2% of silver, 1 to 2% of borax and the balance alloy powder. The alloy powder is composed of, by weight percent, 8 to 12% of calcium, 40 to 47% if silicon, 28 to 32% of barium and the balance mixed powder. The welding powder obtains the boron, the boron is heated and decomposed toboric anhydride and sodium metaborate, sodium metaborate and tin oxide form composite compound with the lower smelting temperature, the composite compound easily floats on the molten aluminum surfaceto form slag, and fluidity of the molten aluminum is improved.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a special welding powder for high-efficiency connection of aluminum hinge wires. Background technique [0002] Aluminum stranded wire is a commonly used power transmission cable, which is prone to damage during long-term outdoor use. When necessary, it needs to be repaired to restore its performance, extend the transmission line replacement cycle, and solve the funds. In the prior art, the aluminum thermal welding method is generally used to repair the aluminum stranded wire; and the aluminothermic welding is a welding process for welding two or more conductors or multiple conductors. The chemical reaction (exothermic reaction) with aluminum and the high temperature generated by the exothermic reaction to achieve high-performance electrical welding have been widely used in aluminum hinged wire connections. However, defects such as pores, slag inclusions, and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28
CPCB23K35/0255B23K35/288
Inventor 胡海峰
Owner JIAXING JIAHE ELECTRIC POWER EQUIP
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