Patent ID: 7026576
Filing Date: 2006-04-11
Classification: B23K

Abstract:
1. A welding method comprising the steps of: providing a stainless steel welding wire comprising C, Si, Mn, Cr, N, Al, Ti, O and Fe, wherein C is present in an amount of greater than zero and up to and including 0.025 mass %, Si is present in an amount of greater than zero and up to and including 1.3 mass %, Mn is present in an amount of greater than zero and up to and including 2.0 mass %, Cr is present in an amount of 10 to 25 mass %, N is present in an amount of 0.047 to 0.2 mass %, Al and Ti are present in amounts in mass % satisfying a relationship (1) below  wherein x and y represent contents in mass % of Al and Ti, respectively, O is present in an amount in mass % satisfying a relationship (2) below  wherein z represents a total amount in mass % of oxygen in the welding wire, and x and y represent the Al and Ti contents, respectively, defined in the relationship (1), and the balance being Fe and unavoidable impurities; preparing a shielding gas containing Ar and at least one of O  wherein x and y represent the Al and Ti contents, respectively, defined in the relationship (1), and z represents the total amount of O defined in the relationship (2); and performing a gas-shielded welding while supplying the shielding gas to a region around the welding wires, wherein during the welding method, AlN and TiN are formed in a welded portion.