公开(公告)号：US20240033861A1

公开(公告)日：2024-02-01

申请号：US18265503

申请日：2021-10-13

Applicant: JFE Steel Corporation

Inventor： Kazufumi Watanabe ,  Atsushi Takada ,  Akiyoshi Ando ,  Takatoshi Okabe ,  Keiji Ueda

IPC: B23K35/30 ,  B23K35/02 ,  B23K9/18

CPC classification number: B23K35/3073 ,  B23K35/0261 ,  B23K9/18

Abstract: A submerged arc welding wire is provided that has a composition including, by mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Cr: 6.0 to 15.0%, and N: 0.120% or less, the balance being Fe and incidental impurities. Where necessary, the wire may contain one or two selected from Ni and Mo, may further contain one, or two or more selected from V, Ti, and Nb, and may additionally contain one, or two or more selected from Cu, Al, Ca, and REM.

公开(公告)号：US20240075560A1

公开(公告)日：2024-03-07

申请号：US18265497

申请日：2021-12-16

Applicant: JFE Steel Corporation

Inventor： Kazufumi Watanabe ,  Atsushi Takada ,  Akiyoshi Ando ,  Takatoshi Okabe ,  Keiji Ueda

IPC: B23K35/30 ,  B23K35/22

CPC classification number: B23K35/3073 ,  B23K35/222 ,  B23K35/308 ,  B23K2103/04

Abstract: A TIG welding filler metal is provided that has a composition including, by mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Cr: 6.0 to 15.0%, and N: 0.120% or less, the balance being Fe and incidental impurities. Where necessary, the filler metal may contain one or two selected from Ni and Mo, may further contain one, or two or more selected from V, Ti, and Nb, and may additionally contain one, or two or more selected from Cu, Al, Ca, and REM. This configuration reduces the occurrence of welding cracks during TIG welding, that is, realizes excellent hot crack resistance, and allows for easy production of a weld joint having high strength and excellent cryogenic impact toughness.