Welding electrode and coating for welding under wading environment, and preparation methods of welding electrode and coating

Abstract

The invention discloses a welding electrode and a coating for welding under a wading environment, and preparation methods of the welding electrode and the coating. The coating comprises the followingcomponent raw materials of, by weight, 35-50% of rutile, 10-20% of calcium carbonate, 5-15% of fluorite, 7-18% of mica, 2-9% of ferrosilicon, 3-9% of ferromanganese, 4-10% of titanium and 1.5-5% of yttrium. Potassium sodium water glass with the weight being 18-30% of the total weight of the coating is further added into the coating, and the mass ratio of potassium oxide to sodium oxide in the potassium sodium water glass is 2:1. Meanwhile, the invention further discloses the preparation methods of the welding electrode and the coating. The preparation process is simple, arcing is easy during welding, electric arc combustion is stable, the phenomena of arc quenching and breaking are avoided, an obtained welded seam is attractive in forming, the tensile strength of a butt-joint connector canreach 550 MPa, the thickness of the butt-joint connector is four times that of a plate, cracks are avoided when the cold bending angle is 180 degrees, the advantages of good welding manufacturability, convenient test operation, high welding efficiency and the like are achieved, and welding of workpieces under the wading environment can be met.

Description

technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to an electrode used for welding in a wading environment. Background technique

[0002] With the rapid development of high-tech, automobiles, ships, railways, construction and marine engineering construction in recent years, the application prospects of welding technology are becoming more and more extensive, and the requirements for welding in some special environments are also increasing. Many, for example, the surface of the weldment is wet, with water, or welding in a rainy environment, which is collectively referred to as welding in a wading environment. When welding in this environment, the workpiece is usually dried, and then welded when there is no moisture on the surface of the workpiece. A lot of inconvenience, welding efficiency is greatly reduced. In addition, there are many special environments where the workpiece cannot be dried before welding, ...

Examples

Embodiment 1

[0023] Embodiment one: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 37%, calcium carbonate 20%, fluorite 13%, mica 12%, ferrosilicon 5%, ferromanganese 5%, Titanium 6%, Yttrium 2%. Potassium-sodium water glass with a potassium-to-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 20% of the total weight of the coating.

Embodiment 2

[0024] Embodiment two: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 45%, calcium carbonate 15%, fluorite 8%, mica 10%, ferrosilicon 6%, ferromanganese 6%, Titanium 5%, Yttrium 5%. Potassium-sodium water glass with a potassium-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 25% of the total weight of the coating.

Embodiment 3

[0025] Embodiment three: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 50%, calcium carbonate 10%, fluorite 10%, mica 8%, ferrosilicon 5%, ferromanganese 8%, Titanium 4%, Yttrium 5%. Potassium-sodium water glass with a potassium-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 28% of the total weight of the coating.

[0026] Weigh the above-mentioned component raw materials respectively by weight, put them into a mixing tank, and dry mix for 3-6 hours; then add potassium sodium water glass as a binder, and wet mix and stir for 1-2 hours. Evenly coat the wet-mixed and uniform coating on the steel wire, the diameter of the steel wire is 4mm, and the outer diameter of the welding rod is 6.2-6.7m. After grinding out the clamping end and arc striking end, the electrode is dried in three stages in the electrode drying furnace: low temperature 40-80°C, medium temperature 100-...

technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to an electrode used for welding in a wading environment. Background technique

[0002] With the rapid development of high-tech, automobiles, ships, railways, construction and marine engineering construction in recent years, the application prospects of welding technology are becoming more and more extensive, and the requirements for welding in some special environments are also increasing. Many, for example, the surface of the weldment is wet, with water, or welding in a rainy environment, which is collectively referred to as welding in a wading environment. When welding in this environment, the workpiece is usually dried, and then welded when there is no moisture on the surface of the workpiece. A lot of inconvenience, welding efficiency is greatly reduced. In addition, there are many special environments where the workpiece cannot be dried before welding, ...

Examples

Embodiment 1

[0023] Embodiment one: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 37%, calcium carbonate 20%, fluorite 13%, mica 12%, ferrosilicon 5%, ferromanganese 5%, Titanium 6%, Yttrium 2%. Potassium-sodium water glass with a potassium-to-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 20% of the total weight of the coating.

Embodiment 2

[0024] Embodiment two: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 45%, calcium carbonate 15%, fluorite 8%, mica 10%, ferrosilicon 6%, ferromanganese 6%, Titanium 5%, Yttrium 5%. Potassium-sodium water glass with a potassium-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 25% of the total weight of the coating.

Embodiment 3

[0025] Embodiment three: adopt commercially available H08E steel wire as welding core, the composition and weight percent of powder are: rutile 50%, calcium carbonate 10%, fluorite 10%, mica 8%, ferrosilicon 5%, ferromanganese 8%, Titanium 4%, Yttrium 5%. Potassium-sodium water glass with a potassium-sodium ratio of 2:1 is used as the binder of the coating, and the addition amount is 28% of the total weight of the coating.

[0026] Weigh the above-mentioned component raw materials respectively by weight, put them into a mixing tank, and dry mix for 3-6 hours; then add potassium sodium water glass as a binder, and wet mix and stir for 1-2 hours. Evenly coat the wet-mixed and uniform coating on the steel wire, the diameter of the steel wire is 4mm, and the outer diameter of the welding rod is 6.2-6.7m. After grinding out the clamping end and arc striking end, the electrode is dried in three stages in the electrode drying furnace: low temperature 40-80°C, medium temperature 100-...

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