Stainless welding rod used for underwater wet welding

Abstract

The invention discloses a high-intensity stainless welding rod used for underwater wet welding. The stainless welding rod used for underwater wet welding comprises two parts including a covering and a core wire and is characterized in that the core wire is 304L stainless steel and the covering is composed by rutile, feldspar, dolomite, carboxymethyl cellulose, manganese powder, silicon iron and nickel powder. The covering comprises, by weight, 40%-52% of rutile, 20%-30% of feldspar, 5%-10% of dolomite, 5%-10% of carboxymethyl cellulose, 5%-9% of manganese powder, 1%-4% of silicon iron and 0%-5% of nickel powder. The high-performance rod used for underwater wet welding is simple in preparation procedure, simple in arc starting in welding, stable in electric arc combustion, good in arc restarting capacity, and beautiful in shape of a gained welding joint. The strength of extension of a butt joint can reach 530 Mpa. When the cold bend angle of the butt joint is 180 degrees, the butt joint is still in good condition and no fissures occur. The stainless welding rod used for underwater wet welding has the advantages of being simple and simple in process, convenient to test and operate, high in production efficiency and the like.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a high-performance stainless steel coated electrode for underwater wet welding with convenient operation. Background technique [0002] In recent years, the ocean has become the main field of competition for countries all over the world. The development of large oil and gas fields and coalbed methane, the construction of underwater workstations, the deployment and maintenance technology of submarine observation networks, the maintenance, disassembly and safety guarantee of offshore platforms all cover underwater welding. Technology, underwater welding technology and welding materials have become the bottleneck restricting the development of marine resources and maintenance of marine engineering. In terms of underwater welding technology, my country has initially realized dry underwater welding, but the more advanced underwater wet welding technology is far behind developed countr...

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Problems solved by technology

However, this electrode is not an underwater stainless steel elect...

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