公开(公告)号：EP3508302A1

公开(公告)日：2019-07-10

申请号：EP17846273.5

申请日：2017-08-24

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： INOUE Tsukuru ,  NISHIMOTO Shinichi ,  NAGAMI Masayuki ,  ISONO Shinya

IPC分类号： B23K35/368 ,  B23K35/30

摘要： This seamless wire containing welding flux is formed by filling a steel sheath with flux, the amount of Fe in the flux per total mass of the wire being 2-15 mass%, and the flux filling ratio being 10-30 mass%. When the amount (mass%) of Fe in the flux per total mass of the wire is X and the flux filling ratio (mass%) is Y, expression (1) is satisfied. By means of this seamless wire containing welding flux, variation in the flux cross-sectional area relative to the wire cross-sectional area, which is caused by a reverse airflow generated during a diameter reduction step, is reduced, and wire breakage during the diameter reduction step is prevented. Y > − 2 ⁢ X + 19