Fillet Welding Method and Fillet Fittings of Composite Plates

Abstract

The invention discloses a fillet welding method of a composite plate and a fillet joint. The fillet welding method includes: S1, opening a bevel on the end of the first composite plate and the second composite plate to be connected; S2, placing the first The composite plate and the second composite plate are relatively vertically placed, and the groove is used for gap butt joint to form a V-shaped groove; S3, using SMAW to weld in the V-shaped groove to form the first transition weld to connect the first low-alloy steel layer and the second The junction of an austenitic stainless steel layer is connected with the junction of the second low-alloy steel layer and the second austenitic stainless steel layer; S4, using SMAW to weld on the first transition weld to form a base weld, and the second A low-alloy steel layer is connected to the second low-alloy steel layer; S5, using SMAW to weld the first transition weld on the side away from the base weld to form the first multi-layer weld and connect the first austenitic stainless steel layer Connected to the second layer of austenitic stainless steel. The invention realizes welding at any welding position and in a limited space, effectively improves the qualified rate of welding, and reduces the rework of unqualified welding seams.

Description

technical field [0001] The invention relates to the technical field of metal composite plate welding, in particular to a method for fillet welding of composite plates and a fillet joint. Background technique [0002] In conventional nuclear power facilities, carbon steel plate + anti-corrosion coating is selected as the raw material of the suppression pool components. The components of the suppression pool made of carbon steel plate + anti-corrosion coating, due to the short service life of the anti-corrosion coating, need irregular inspection and maintenance to ensure the integrity and corrosion resistance of the anti-corrosion coating, which is very important for long-term There are a number of disadvantages to placing small nuclear reactors on offshore platforms. [0003] For the clad plate formed by compounding two metals, the clad plate is currently formed by explosive welding, which can only produce steel of a specific size, and cannot meet the needs of special sizes ...

AI Technical Summary

Problems solved by technology

The components of the suppression pool made of carbon steel plate + anti-corrosion coating, due to the short service life of the anti-corrosion coating, need irregular inspection and maintenance to ensure the integrity and corrosion resistance of the anti-corrosion coating, which is very important for long-term There are many disadvantages of placing small nuclear reactors on offshore platforms

[0003] For the clad plate formed by compounding two metals, the clad plate is currently formed by explosive welding, which can only produce steel of a specific size, and cannot meet the needs of special sizes and other types of engineering, such as pressure-resistant shells or nuclear reactor suppression pool structures, ships Steel structure, seawater system, plate equipment in seawater heat exchange

[0004] Existing low-alloy steel clad plates are used in pressure-resistant shells or nuclear reactor suppression pool structures, ship steel structures, seawater systems, plate-type equipment in seawater heat exchange, etc. Due to the limitation of operating space, automatic welding cannot be realized. If manual TIG, limited by the small wire diameter, leads to too many welding layers and passes, and low production efficiency

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