This work; Welding seams of the blocks forming the mega blocks forming the hulls of the ship are combined with SAW and FCAW welding methods; It includes visual (visual) examination, radiographic examination, tensile test and impact-notch tests and examinations. Purpose of experimental study; It is the welding of blocks by determining the fastest method with the least error rate. It consists of approximately 25-35 mega blocks and 45-60 blocks on a 60m ship hull. In this study; Grade A steel sheet blocks of 1.2cm thickness, 1200cm length and 2200cm width were used to form the ship's hull, and submerged (TANDEM-ICE) and gas (MIG / MAG) welding was applied. By applying submerged arc welding within the scope of EN ISO 14171-A standard; Tandem wire diameter 4mm and ICE wire diameter 2.4mm, Tandem: 1100Amper, 35 Volt and 80cm / min. ICE: 550 Amps 35 Volt 40% ICE parameters are used. By applying gas welding within the scope of EN ISO 14341-A standard; 1.2mm wire diameter, 190 Amps, 25 Volt and 46cm / min. parameters are used. 3 block panels and 6 block panels in total were used from each welding application. Samples taken from each welded joint; Its suitability with NDT tests, tensile and notch-impact tests and mechanical strengths, and errors that occur with the same weld feed rate we used in two different methods were examined.
Anahtar Kelimeler: Submerged arc welding, gas metal arc welding; Welding of ship bloks, Impact-notch testing of weld joints, radiographic test of weld joints
|
