公开(公告)号：EP3744466A1

公开(公告)日：2020-12-02

申请号：EP18901019.2

申请日：2018-01-22

申请人： NIPPON STEEL CORPORATION

发明人： WATANABE, Kotaro ,  HAMATANI, Hideki ,  WATANABE, Fuminori ,  TANAKA, Kimiharu ,  TAKEDA, Yusuke ,  TOMONAGA, Yuya ,  HASHIMOTO, Yoshihiro ,  HAYASHI, Masahide

IPC分类号： B23K13/06 ,  B21C37/08 ,  B23K13/00

摘要： What is provided is an electric resistance welded steel pipe manufacturing device that is configured to perform welding while forming a strip-shaped steel sheet in a tubular shape and supplying a plasma flow to a pair of abutment end surfaces to perform shielding. The electric resistance welded steel pipe manufacturing device includes a mandrel; and a plasma flow feeder that is provided in the mandrel to supply the plasma flow.