Patent ID: 9550254
Date: 2017-01-24
CPC Classifications: B23K

Claim:
1. A MIG arc welding method, comprising MIG welding using a flux-cored wire formed with a steel outer sheath filled with a flux, said flux-core wire comprising in said flux, graphite: 0.16 to 2.00 mass % on the basis of a total flux-core wire mass; and iron powder: 20 mass % or more on the basis of a total flux mass, wherein a pure Ar gas conforming to JIS K 1105 Class 1 or 2 is used as a shielding gas, and an arc is generated between the wire set to a positive pole and a base metal set to a negative pole, wherein said iron powder has an Fe concentration of 95 mass % or more and a granularity of 500 μm or less.