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High-stability coating for underwater wet welding rod

A high-stability, wet-process technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of lack of stable combustion underwater wet welding electrodes, etc., and achieve good underwater welding process performance, The effect of good re-strike performance and beautiful weld formation

Inactive Publication Date: 2015-09-02
青岛哈工海洋工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the welding electrodes for underwater wet welding developed at home and abroad are aimed at improving the mechanical properties of the weld and reducing costs, and there is a lack of special welding electrodes for underwater wet welding that can burn stably under harsh conditions such as poor water quality and high water velocity.

Method used

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  • High-stability coating for underwater wet welding rod
  • High-stability coating for underwater wet welding rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1, the solid component is made of the following raw materials in mass percentage: 55% rutile, 12% fluorite, 6% marble, 5% ferromanganese, 10% nickel powder, 10% cryolite, 2% cesium nitrate ;

[0020] The effect is as follows:

[0021]

Embodiment 2

[0022] Example 2, the solid component is made of the following raw materials in mass percentage: 53% rutile, 11% fluorite, 8% marble, 5% ferromanganese, 10% nickel powder, 11% cryolite, 2% cesium nitrate ;

[0023] The effect is as follows:

[0024]

Embodiment 3

[0025] Example 3, the solid component is made of the following raw materials in mass percentage: 52% rutile, 15% fluorite, 5% marble, 4% ferromanganese, 13% nickel powder, 10% cryolite, 1% cesium nitrate ;

[0026] The effect is as follows:

[0027]

[0028] The main effect of each component in the drug skin of the present invention is as follows:

[0029] Rutile: The main function is to make slag, which can adjust the melting point, viscosity, surface tension and fluidity of slag, improve weld formation and slag removal, and reduce spatter. Titanium element is an element with low ionization potential. The presence of a large amount of titanium element helps to reduce the arc voltage and improve arc stability. When the artificial rutile content is too high, a large number of fine and many splashes will appear, and the slag will become too active, which will easily lead to poor slag coverage; when the rutile content is too low, the fluidity of the slag will also become po...

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Abstract

The invention discloses a high-stability coating for an underwater wet welding rod. The coating is prepared by mixing a solid component and a liquid component, wherein the mass of the added liquid component is 15%-20% of that of the solid component; the solid component is prepared from raw materials in percentage by mass as follows: 45%-55% of rutile, 10%-16% of fluorite, 5%-8% of marble, 4%-8% of ferromanganese, 8%-15% of nickel powder, 8%-10% of cryolite and 0%-2% of cesium nitrate; the liquid component adopts potassium-sodium water glass with the potassium-sodium ratio being 3:1 at the temperature of 20 DEG C. According to the high-stability coating for the underwater wet welding rod, arc strike can be performed smoothly under the conditions that the water depth doesn't exceed 20 meters and the water velocity is not higher than 1.2 m / s, continuous stable combustion is realized, an electric arc extinguishing phenomenon is avoided, the strength is higher than or equal to 400 MPa, and the welding requirements of a non-structural member are basically met.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a high-stability underwater wet-process electrode coating. Background technique [0002] Underwater welding has great application potential in the construction of offshore facilities, construction of offshore oil and gas platforms, salvage and rescue of sunken ships, and construction of offshore bridges. Different from welding on land, underwater welding has different requirements for welding materials and welding processes due to its special operating environment and service status of welded joints. [0003] In actual marine conditions, the welding process is usually affected by ocean currents, and the directional flow of water may affect the stability of the arc, and may lead to arc extinction in severe cases. However, for welding repairs of some non-structural parts, due to the lower requirements on the mechanical properties of the weld, the stability of the welding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36
CPCB23K35/3601
Inventor 杜永鹏杨振林李海新韩焱飞殷子强
Owner 青岛哈工海洋工程技术有限公司
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