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AssigneeNippon Welding Rod Co., Ltd.
InventorsMasaaki Kobayashi, Satoru Nonaka, Yukio Agata, Teiichiro Saito, Tadashi Ito
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The present invention provides a ferritic stainless steel welding wire which allows prevention of wire breaking, fine refining of crystal grains, and increased cracking resistance. A wire rod used essentially consists of, in mass %, 0.03% or less of C, 3% or less of B, 3% or less of Mn, 2% or less of Ni, 11 to 20% of Zr, 3% or less of Mo, 1% or less of Co, 2% or less of Cu, 0.02 to 2.0% of Al, 0.2 to 1.0% of Ti, 0.02% or less of O, 0.04% or less of N, at least one of Nb and Ta, the mass % thereof being eight times the total mass % of the C and N to 1.0 mass %, and the balance of Fe and unavoidable impurities. When the number of crystals per square mm (mm2) of a cross section of the wire rod is defined as m, a grain number of the crystal expressed by an exponent (G) in an expression of m=8×2G is set to 3 to 10 by the heat treatment.
A ferritic stainless steel welding wire used in gas shielded arc welding consisting essentially of, by mass, more than 0% and less than or equal to 0.03% C, more than 0% and less than or equal to 3% Si, more than 0% and less than or equal to 3% Mn, more than 0% and less than or equal to 2% Ni, 11 to 20% Cr, more than 0% and less than or equal to 3% Mo, more than 0% and less than or equal to 1% Co, more than 0% and less than or equal to 2% Cu, 0.02 to 2.0% Al, 0.2 to 1.0% Ti, more than 0% and less than or equal to 0.02% O, more than 0% and less than or equal to 0.04% N, and at least one of Nb and Ta, the mass % thereof being eight times the total mass percent of said C and said N to 1.0 mass %,
A ferritic stainless steel welding wire used in gas shielded arc welding consisting essentially of, by mass, more than 0% and less than or equal to 0.03% C, more than 0% and less than or equal to 3% Si, more than 0% and less than or equal to 3% Mn, more than 0% and less than or equal to 2% Ni, 11 to 20% Cr, more than 0% and less than or equal to 3% Mo, more than 0% and less than or equal to 1% Co, more than 0% and less than or equal to 2% Cu, 0.02 to 2.0% Al, 0.2 to 1.0% Ti, more than 0% and less than or equal to 0.02% O, more than 0% and less than or equal to 0.04% N, at least one of Nb and Ta, the mass % thereof being eight times the total mass percent of said C and said N to 1.0 mass %, and at least one of more than 0 mass % and less than or equal to 0.04 mass % P, more than 0 mass % and less than or equal to 0.02 mass % S, more than 0 mass % and less than or equal to 0.5 mass % V, more than 0 mass % and less than or equal to 0.5 mass % W, more than 0 mass % and less than or equal to 0.02 mass % Zr, more than 0 mass % and less than or equal to 0.02 mass % B, more than 0 mass % and less than or equal to 0.005 mass % Ca, and more than 0 mass % and less than or equal to 0.005 mass % Mg,
A method of manufacturing a ferritic stainless steel welding wire used in gas shielded arc welding, in which a wire rod is subjected to heat treatment and subsequently to drawing,
A method of manufacturing a ferritic stainless steel welding wire used in gas shielded arc welding, in which a wire rod is subjected to heat treatment and subsequently to drawing,
Dependencies are inferred from the claim text.