FLUX-CORED WIRE FOR VERTICAL ELECTROGAS ARC WELDING, AND METHOD FOR PRODUCING WELD JOINT

• Main Authors: HASHIBA YUJI, MATSUO TAKESHI, SASAKI MASAHITO
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2019
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To provide a flux-cored wire for vertical electrogas arc welding that is used for a vertical electrogas arc welding process, and makes it possible to obtain a weld metal with excellent strength and toughness, and a method for producing a weld joint using the same.SOLUTION: The present invention provides a flux-cored wire in which a deacidifying ability index X is 100-200, a total amount Y of slag agent is 0.10-less than 1.00%, the product of the deacidifying ability index X and the total amount Y is 10-200, an alloy content is in a predetermined range, and Ceq of the alloy content is 0.45-0.75%.SELECTED DRAWING: None 【課題】立向エレクトロガスアーク溶接方法において、強度及び靭性が良好な溶接金属を得ることができる立向エレクトロガスアーク溶接用フラックス入りワイヤと、これを用いた溶接継手の製造方法を提供する。【解決手段】本発明の一態様に係るフラックス入りワイヤは、脱酸能指標Ｘが１００〜２００であり、スラグ剤の合計量Ｙが、０．１０〜１．００％未満であり、前記脱酸能指標Ｘと前記合計量Ｙとの積が１０〜２００であり、合金成分が所定範囲内であり、前記合金成分のＣｅｑが０．４５〜０．７５％である。【選択図】なし