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Thermit iron welding flux special for welding steel grounding materials and welding method thereof

An iron welding and aluminothermic technology, applied in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of weak welding joints, electrochemical corrosion, etc., and achieve high construction efficiency, easy portability, and safe operation. Effect

Active Publication Date: 2013-01-09
SICHUAN SUNLIGHT INTELLIGENT ELECTRIC EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a thermite flux and its welding method specially used for welding steel grounding materials in view of the shortcomings of steel grounding materials such as weak welded joints and electrochemical corrosion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In Embodiment 1, the specific weight ratio of the components of the aluminothermic solder that is specially used for welding steel grounding materials is as follows:

[0051] The reducing agent is aluminum powder, the quantity is 18 parts, the purity of the aluminum powder is more than 99.9%, the activity is more than 98%, and the particle size is 40-60 mesh; the oxidizing agent is iron oxide powder, the quantity is 63 parts, and the iron oxide powder is made of Combination of iron and ferric oxide (any weight ratio between the two is acceptable), the particle size is 20-40 mesh; the filler is iron powder, the quantity is 3 parts, the particle size is 20-40 mesh ; The slag remover is fluorspar powder, the quantity is 3 parts, and the particle size is 120-150 mesh; the welding strength enhancer is magnesium powder, ferrosilicon powder, ferromanganese powder, and ferrochrome powder, of which: 0.2 parts of magnesium powder, granule The particle size is 60-80 mesh; the ferr...

Embodiment 2

[0054] In Embodiment 2, the specific weight ratio of the components of the aluminothermic solder that is specially used for welding steel grounding materials is as follows:

[0055] 18 parts of reducing agent aluminum powder, the purity of aluminum powder is above 99.9%, the degree of activity is above 98%, and the particle size is 40-60 mesh; 68 parts of oxidant iron oxide powder, iron oxide powder is composed of ferric oxide It is combined (any weight ratio between the two is acceptable), the particle size is 20-40 mesh; the filler iron powder is 4 parts, the particle size is 20-40 mesh; the slag remover fluorspar powder is 5 parts, particle size is 120-150 mesh; welding strength enhancer is magnesium powder, ferrosilicon powder, ferromanganese powder, ferrochrome powder, of which: magnesium powder is 0.3 parts, particle size is 60-80 mesh; ferrosilicon is 0.20 parts, the particle size is 40-60 mesh; 0.15 parts of ferromanganese powder, the particle size is 40-60 mesh; 0.20 ...

Embodiment 3

[0058] In Embodiment 3, the specific weight proportions of the components of the aluminothermic solder dedicated to steel grounding material welding are as follows:

[0059]20 parts of reducing agent aluminum powder, the purity of aluminum powder is above 99.9%, the activity degree is above 98%, and the particle size is 40-60 mesh; 68 parts of oxidant iron oxide powder, iron oxide powder is composed of ferric oxide It is combined (any weight ratio between the two is acceptable), the particle size is 20-40 mesh; the filler iron powder is 6 parts, the particle size is 20-40 mesh; the slag remover fluorspar powder is 7 parts, particle size is 120-150 mesh; welding strength enhancer is magnesium powder, ferrosilicon powder, ferromanganese powder, ferrochrome powder, wherein: magnesium powder is 0.4 part, particle size is 60-80 mesh; ferrosilicon is 0.3 parts, the particle size is 40-60 mesh; 0.3 parts of ferromanganese powder, the particle size is 40-60 mesh; 0.20 parts of ferroch...

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Abstract

The invention discloses a thermit iron welding flux special for welding steel grounding materials. The thermit iron welding flux is prepared by aluminum powder, iron oxide powder and alloy additives through even mixing. The thermit iron welding flux and a welding method thereof have the advantages that the operation is safe, professional technical knowledge and special protection are not needed, and the welding method is simple and easy to learn; external energy resources are not needed, tools are convenient to carry, and the construction efficiency is high; and unification of parent metal and welded joint materials can be achieved, and the problem of fracture of a joint caused by electrochemical corrosion and the fact that thermal stress is easy to produce in a welding process and when impulse currents are born due to differences in melting point, coefficient of linear expansion, thermal conductivity and specific heat capacity between the parent metal and the welded joint is solved.

Description

[0001] technical field [0002] The invention relates to a thermite flux used for welding steel grounding materials and a welding method thereof. Background technique [0003] Exothermic welding is mainly divided into aluminothermic brazing and aluminothermic iron welding. At present, aluminothermic brazing is widely used, while aluminothermic iron welding is mainly used for rail connection. Thermite flux for steel grounding material welding is an exothermic welding method for steel to steel (mainly flat bar to flat bar, flat bar to round bar, round bar to round bar). [0004] The main connection method of steel structure is welding. The commonly used method in grounding is arc welding. However, arc welding has strict requirements on the size of the groove made by the material to be welded and takes a long time to process. The welding process requires power and the supporting equipment is relatively It is bulky, and the most important thing is that arc welding only overlaps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K23/00
Inventor 苏凡凡陈国清
Owner SICHUAN SUNLIGHT INTELLIGENT ELECTRIC EQUIP CO LTD
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