DEVELOPMENT OF WELDING MATERIALS FOR HIGH HEAT INPUT WELDING COMPATIBLE WITH THICK STEEL PLATES OF 460 MPa YIELD POINT CLASS FOR VERY LARGE CONTAINER SHIPS

作者：Hashiba Y^*; Sasaki K; Kasuya T; Inoue T; Funatsu Y

来源：Welding in the World, 2010, 54(1-2): R35-R41.

• Arc welding
• Brittle fracture
• Electrogas welding
• Fractures
• High strength steels
• Mechanical properties
• Microstructure
• Mismatch
• Reference lists
• Steels
• Shipbuilding
• Toughness
• Weld metal

Electrogas arc welding with high efficiency (Two-electrode Vibratory Electrogas Arc Welding, 2E-VEGA (R) process) and flux-cored wires for the 2E-VEGA process have been developed. They can be applied to YP460 MPa class extremely thick steel plates for very large container ships. The travel speed of the developed 2E-VEGA process is about twice as high as that of the ordinary 1E-VEGA process. Weld metal obtained with the present process and the present wires satisfied the target requirements of YP (yield point or proof stress) >= 460 MPa, TS (tensile strength) >= 570 MPa, vE(-20) (-20 degrees C Charpy absorbed energy) >= 53 J and Hv (hardness number) <= 210 Hv in Vickers scale, even when 30 kJ/mm arc energy welding for 51 mm-thick plates was conducted. Using the present process and the present wires, sufficient fracture toughness of joints welded with high arc energy can be obtained.

• 出版日期2010-2