Low-hydrogen type stainless steel self-protecting flux-cored wire suitable for underwater environment

Abstract

The invention belongs to the field of welding materials, and relates to a low-hydrogen type stainless steel self-protecting flux-cored wire suitable for underwater environment. The low-hydrogen type stainless steel self-protecting flux-cored wire comprises outer layer metal skin and inner medicine cores, wherein the outer layer metal skin is 316L stainless steel band. The low-hydrogen type stainless steel self-protecting flux-cored wire is characterized in that the inner medicine core consists of components in percentage by mass of 40-60% of a gas making slagging agent, 2-5% of an arc stabilizer, 3-15% of a deoxidizer and 30-50% of an alloying agent. According to the self-protecting flux-cored wire, the gas making slagging agent achieves the effect of protecting weld metals, welding and arc starting are easy, and arc stability is good. Full-position underwater welding of metal structures of low-alloy steels, stainless steels and the like can be realized, the obtained welding contacts are high in quality, and can be used for high-quality repair and welding on metal structures associated with underwater environment of nuclear power, marine, and the like.

Description

technical field [0001] The invention belongs to the field of welding materials and relates to a low-hydrogen stainless steel self-protecting flux-cored welding wire suitable for underwater environments. Background technique [0002] In addition to the working load, the steel structure serving in the underwater environment also bears the additional load caused by storms, tides, waves, etc., as well as the effects of quicksand abrasion and seawater corrosion. Offshore and offshore facilities have higher requirements on design planning, manufacturing material selection and welding quality. The emergency repair and daily maintenance of offshore facilities make underwater welding technology a key technology in marine engineering construction. At present, welding materials for stainless steel structures in underwater environments are mainly welding rods, which have low welding efficiency and cannot achieve efficient and high-quality underwater welding repairs. [0003] Patents CN...

AI Technical Summary

Problems solved by technology

At present, welding materials for stainless steel structures in underwater environments are mainly welding rods, which have low welding efficiency and cannot achieve efficient and high-quality underwater welding repairs

[0003] Patents CN102229029A, CN102451961A, CN103949796A and JP2017131912A all disclose a kind of stainless steel flux-cored welding wire, but the welding wire disclosed in these patents is gas-shielded and cannot realize self-protection function, and can only be used in land environment, and it is easy to pinch when welding underwater Slag defects, unable to effectively protect the weld metal, poor performance

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