Shipbuilding

In shipbuilding most of the production belongs to welding. That’s why the welding processes are constantly being improved, using the latest development, which certainly accelerates the process. Most often SMAW (manual arc welding), FCAW (semi-automatic welding flux cored wire) and SAW (submerged arc welding machine) welding processes are used.

Certainly, in shipbuilding industry the great part of time are taken for welding of sectional metal panels, frames and stringers. Submerged arc welding is used for panels welding, and the set are welded by solid or cored wire and electrodes. Due to the excellent properties of surfacing and technological novelty the cored rutile wire has received a wide application.

Depending on the brand mark steel using in shipbuilding industry There are used the electrodes of basic types: for welding of high-strength steels in all positions with thin layer plaster for installation and welding on the descent. Working with CO2 the rutile type of flux-cored wire used for welding in all positions , including on ceramic backing, rutile flux-cored wire for welding in shielding gas Ar/CO2, for welding in all positions and ceramic backing, universal flux-cored wire for welding fillet welds and filling the aisles in the lower spatial position in Ar/CO2, high-performance flux wire and the similar for work in 100 % CO2.

For cold-resistant welded steel hull barge and icebreakers that operate at very low temperatures, the following welding materials are used: low carbon manganese-nickel welding wire with low composition of harmful impurities and gases. Also the special coatings for electrodes and special agglomerated fluxes are applied. It provides a high cold resistance of the weld metal at -60 º C.

Thanks to its light weight and the positive characteristics in shipbuilding aluminum are often used, mainly in the construction of ferry boats and yachts. This metal has good corrosion resistance and high resistance to fatigue failure. Aluminum plates with a thickness of 4.5 mm are connected by pulsed MIG welding. For more complex and demanding applications TIG welding is used. Zirconium, which is part of the electrode wash, improves weld quality.

In titanium welding, that is used in the construction of submarines and submersibles, the arc welding in inert gases and non-consumable consumable electrode is applied. Also the arc welding is used in flux, electrode beam contact and electroslag welding.

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