Corner connection welding method of composite boards and corner connection part

Abstract

The invention discloses a corner connection welding method of composite boards and a corner connection part. The corner connection welding method comprises the steps that S1, grooves are formed in theto-be-connected ends of the first composite board and the second composite board; S2, the first composite board and the second composite board are placed in a relatively vertical manner, through thegrooves, gap butt joint is carried out, and a V groove is formed; S3, welding is carried out in the V groove through SMAW, a first transition welding line is formed, and the connecting position of a first low-alloy steel layer and a first austenite stainless steel layer is connected with the connecting position of a second low-alloy steel layer and a second austenite stainless steel layer; S4, welding is carried out on the first transition welding line through SMAW, a base layer welding line is formed, and the first low-alloy steel layer and the second low-alloy steel layer are connected; S5,welding is carried out on the side, away from the base layer welding line, of the first transition welding line through SMAW, a first multiple-layer welding line is formed, and the first austenite stainless steel layer and the second austenite stainless steel layer are connected. Welding of any welding position and limited space is achieved, the welding yield is effectively improved, and reworkingof disqualification welding lines is reduced.

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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