High-strength steel plates such as YP460 MPa class with more than 50 mm in thickness, to which high arc energy welding can be applied, have been developed. This trend requires a high arc energy welding process with higher efficiency that can be applied to plates of 50 mm-thick or more. Welding consumables for such a welding process are also required. This work serves two purposes. The first is to develop a new welding process with a travel speed twice as high as that of the ordinary VEGA process (Single-electrode Vibratory Electrogas Arc Welding, 1E-VEGA process) and the second, to develop flux-cored wires for the present welding process that can be applied to the recently-developed YP460 MPa class steel. Electrogas arc welding with high efficiency (Two-electrode Vibratory Electrogas Arc Welding, 2E-VEGA 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 deg 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.


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    Titel :

    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


    Beteiligte:
    Hashiba, Yuuji (Autor:in) / Sasaki, Kiyohito (Autor:in) / Kasuya, Tadashi (Autor:in) / Inoue, Takehiro (Autor:in) / Funatsu, Yuuji (Autor:in)

    Erschienen in:

    Welding in the World ; 54 , 1/2 ; R35-R41


    Erscheinungsdatum :

    2010


    Format / Umfang :

    7 Seiten, 9 Bilder, 3 Tabellen, 11 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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