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Low-dust low-nitrogen electric welding rod and preparation method thereof

A technology of welding rods and welding cores, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of welding personnel hazards, easy diffusion of dust, complicated welding positions, etc., and achieve the effect of improving mechanical properties and crack resistance

Inactive Publication Date: 2018-08-24
济南能源工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Underground directly buried metal pipelines are widely used in urban heating, gas, water supply and drainage and other municipal engineering or industrial production. Most of the connections of such pipelines are welded by artificial arc welding. If it is implemented in a deep groove or pipe trench, the operating space is narrow, the air is not smooth, and the welding position is complicated (including all positions of flat welding, vertical welding, overhead welding and horizontal welding), especially for larger diameter welding. Metal pipes also need to be welded on both sides inside and outside. Welders have to enter the inside of the pipes to carry out welding operations. The welding environment is extremely harsh, and the dust in the welding fume is easy to spread. Inhaling a large amount of it will cause serious harm to the welders and cause health problems. Adverse effects, long-term inhalation may even cause serious occupational diseases, so measures to reduce fumes must be taken to reduce the hazards of welding fumes
At present, the commonly used measures are first to reduce the dust generation of welding materials such as welding rods, and secondly to adopt a ventilation and dust exhaust system. Considering the actual situation of the construction site, the latter method is not easy to implement

Method used

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  • Low-dust low-nitrogen electric welding rod and preparation method thereof
  • Low-dust low-nitrogen electric welding rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]The drug skin is made of the following raw materials in mass percentage: titanium dioxide: 11.5%, wollastonite: 25.5%, barium carbonate: 11%, magnesite: 9%, talcum powder: 10%, silicon aluminum barium: 5% %, manganese metal: 4.5%, low-carbon ferromanganese: 5%, ferro-titanium: 5%, aluminum powder: 4%, starch: 3%, rice husk powder: 5%, and binder: 1.5%; The welding core is H08C welding steel; the coating weight coefficient is 10%.

[0044] Preparation method: mix the powder of the above raw materials evenly, add a mixture of alginic acid and glutinous rice water with a mass ratio of 2:1 and a total mass of 1.5% of the total mass of the drug skin, and press evenly on H08C welding after stirring On the surface of the steel welding core, make a semi-finished electrode with a diameter of 4.0mm and a length of 250mm, then dry the semi-finished electrode at room temperature and then dry it at 180°C for 2 hours, and then make a low-dust and low-hydrogen electrode .

Embodiment 2

[0046] The drug skin is made of the following raw materials in mass percentage: titanium dioxide: 10%, wollastonite: 26%, barium carbonate: 14.4%, magnesite: 8%, talcum powder: 14.4%, silicon aluminum barium: 8% %, manganese metal: 5%, low-carbon ferromanganese: 2%, ferro-titanium: 3%, aluminum powder: 2%, starch: 2%, rice husk powder: 4%, and binder: 1.2%; The welding core is H08C welding steel; the coating weight factor is 12%.

[0047] Preparation method: Mix the powder of the above raw materials evenly, then add the mixture of alginic acid and glutinous rice water with a mass ratio of 2:1 and a total mass of 1.2% of the total mass of the drug skin, and press evenly on H08C welding after stirring On the surface of the steel welding core, make a semi-finished electrode with a diameter of 8.0mm and a length of 300mm, then dry the semi-finished electrode at room temperature and then dry it at 185°C for 2 hours, and then make a low-dust and low-hydrogen electrode. .

Embodiment 3

[0049] The drug skin is made of the following raw materials in mass percentage: titanium dioxide: 11%, wollastonite: 25.6%, barium carbonate: 12.5%, magnesite: 9%, talcum powder: 11%, silicon aluminum barium: 6% %, manganese metal: 3%, low-carbon ferromanganese: 3%, ferro-titanium: 4%, aluminum powder: 2.5%, starch: 4%, rice husk powder: 7%, and binder: 1.4%; welding core H08C welding steel is used; the coating weight factor is 11%.

[0050] Preparation method: Mix the powder of the above raw materials evenly, then add the mixture of alginic acid and glutinous rice water with a mass ratio of 2:1 and a total mass of 1.4% of the total mass of the drug skin, and press evenly on H08C welding after stirring On the surface of the steel welding core, a semi-finished electrode with a diameter of 12mm and a length of 350mm is made, and then the semi-finished electrode is dried at room temperature and then dried at 190°C for 2 hours. After completion, a low-dust and low-hydrogen electro...

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Abstract

The invention provides a low-dust low-nitrogen electric welding rod. A cover is prepared from, by mass, 10-12% of titanium dioxide, 25-28% of wollastonite, 11-15% of barium carbonate, 8-10% of magnesite, 10-15% of talcum powder, 5-8% of silicon-aluminium-barium, 3-5% of manganese metal, 2-5% of low-carbon ferromanganese, 3-5% of ferrotitanium, 2-4% of aluminum powder, 2-4% of starch, 4-7% of ricehull powder and 0.8-1.5% of adhesion agent. The cover contains no fluoride or Na and K aikali metal compound, and has the low cover weight coefficient, and welding dust can be greatly reduced. The invention further provides a preparation method of the low-dust low-nitrogen electric welding rod. Ingredient formula enhancement and technology enhancement are combined, the technological performance ofthe electric welding rod is excrement, the total amount of fumes is low, and operation conditions are improved.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a low-dust and low-hydrogen welding electrode and a preparation method thereof. Background technique [0002] Underground directly buried metal pipelines are widely used in urban heating, gas, water supply and drainage and other municipal engineering or industrial production. Most of the connections of such pipelines are welded by artificial arc welding. If it is implemented in a deep groove or pipe trench, the operating space is narrow, the air is not smooth, and the welding position is complicated (including all positions of flat welding, vertical welding, overhead welding and horizontal welding), especially for larger diameter welding. Metal pipes also need to be welded on both sides inside and outside. Welders have to enter the inside of the pipes to carry out welding operations. The welding environment is extremely harsh, and the dust in the welding fume is easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/40
Inventor 侯登义尹承磊
Owner 济南能源工程集团有限公司
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