HUABAO welding stress relief equipment's Application in Ship Maintenance...............

In ship maintenance, welding repair occupies a significant proportion. The welded areas often bear the most severe fatigue loads and seawater corrosion. If these areas are not effectively treated for residual stress after welding, similar damage will continue to occur, potentially shortening the maintenance cycle. Using HUABAO stress-relief treatment during welding repair can significantly reduce welding deformation and post-weld cracking. For example, Plant 4808 applied this technology in the maintenance of nuclear submarines. Test data showed that the residual stress after welding was 200-285 MPa, and after HUABAO stress-relief treatment, the residual stress was completely eliminated (with a stress relief rate of over 99%), turning the stress into ideal compressive stress.

Nanjing Jinling Shipyard faced multiple cracks in welded repair areas during sea trials of a repaired ship, preventing delivery. After using HUABAO stress-relief technology on all welded seams, no cracks were found in subsequent sea trials, and the ship was successfully delivered. The client praised the shipyard's repair quality, and HUABAO stress-relief technology is often used to treat casting defects discovered during production and wear and corrosion found after use on ship engines to eliminate welding residual stress...............

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