Low-cost wet method underwater welding rods

Abstract

The invention provides a low-cost underwater wet welding rod which adopts a commercial H08E welding wire as a welding core; the main components and weight proportion of coating are as follows: 20-30% of ilmenite, 10-15% of dolomite, 25-35% of ferrous powder, 8-15% of potassium feldspar, 2-7% of medium-carbon ferromanganese, 5-9% of white slime, 3-8% of titanium pigment, 1-4% of CMC and 1-5% of fine mica; the high viscosity resin which accounts for 8-15% of the total weight of the coating components is added. By adopting the high viscosity resin as an adhesion agent, the welding rod of the invention can be directly applied to underwater wet welding after extrusion and does not need to be coated with a waterproof coating on the surface, thus simplifying production technique, improving production efficiency and reducing production cost; the invention can ensure that after the welding rod is soaked in water for a long time, the coating dose not go bad and drop off, and welding operation can still be carried out. When used in underwater welding, the welding rod has the advantages of easy arc striking, stable combustion of electric arc, good performance of restarting, easy slag detachability, good weld forming and fine processing property of underwater welding.

Description

technical field [0001] The invention belongs to the field of welding materials and relates to a low-cost underwater wet welding electrode. Background technique [0002] With the advancement of the ocean development process, underwater wet welding electrodes are more and more widely used in military and civilian underwater steel structures such as the construction and maintenance of bridges, port facilities and offshore platforms, and the repair of submarines. At present, underwater wet welding materials have been developed successively at home and abroad, but in order to meet the particularity of welding rods in underwater construction, after the production of welding rods, it is necessary to apply a special waterproof layer on the surface, which is not only labor-intensive and production The quality requirements are high, and the production efficiency is low and the production cost is high. For example, the price of domestic TS208 welding rod is more than 100,000 yuan / ton....

AI Technical Summary

Problems solved by technology

At present, underwater wet welding materials have been developed successively at home and abroad, but in order to meet the particularity of welding rods in underwater construction, after the production of welding rods, it is necessary to apply a special waterproof layer on the surface, which is not only labor-intensive and production High quality requirements, low production efficiency and high production costs

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