A low hydrogen type deep water wet welding rod

Abstract

The invention provides a low hydrogen type deep water wet welding electrode. According to the low hydrogen type deep water wet welding electrode, an H08E steel wire is utilized as a welding core, a coating mainly comprises, by weigh percent, 35-42% marble, 10-18% fluorite, 5-8% quartz sand, 2.5-4% titanium dioxide, 3-6% artificial rutile, 2.5-7.5% electrolytic manganese, 7-9% ferrosilicon and 3-6% ilmenite, with the balance being iron powder, and water glass is used as binder. After the welding electrode is extruded, polyurea elastomers are sprayed on the surface of the coating of the wet welding electrode to serve as a waterproof layer. The low hydrogen type deep water wet welding electrode can be used for the wet welding of a steel structure of 0-60 miles deep under the water, arcs are stable, formation of weld is good, porosity is low, and the waterproof layer can guarantee that the coating does not deteriorate or fall off after the welding electrode is soaked in water for a long time, so that the welding operation can still be performed.

Description

technical field [0001] The invention belongs to the field of welding materials, and relates to a low-hydrogen deep-water wet welding electrode which can be used for wet welding of steel structures at a depth of 0 to 60 meters underwater. Background technique [0002] With the large-scale development and utilization of marine resources, underwater wet welding electrodes are increasingly widely used in the construction and maintenance of underwater steel structures such as bridges, port facilities, offshore oil platforms and pipelines, submarines, ships, and underwater salvage. . [0003] Invention patent CN 101347873A, using ilmenite, dolomite, iron powder, potassium feldspar, medium carbon ferromanganese, white clay, titanium dioxide, CMC and fine mica as main components, and resin as binder, welding rod pressure coating Finally, there is no need to apply a waterproof coating on the surface. Some wet welding electrodes use water glass as a binder, and it is necessary to co...

AI Technical Summary

Problems solved by technology

However, paint, paraffin and other materials are resistant to water immersion for a short time. If soaked in water for more than 20 minutes, the paint and paraffin will foam and peel off, and the waterproof effect is very poor.

However, if phenolic resin is used as a binder, hydrogen pores are likely to be generated in wet welding, which affects the performance of welded joints.

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