C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/28 (2006.01) C21D 6/00 (2006.01) C22C 38/06 (2006.01) C22C 38/18 (2006.01)
Patent
CA 2533946
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 x 2 G is set to 3 to 10 by the heat treatment.
Agata Yukio
Ito Tadashi
Kobayashi Masaaki
Nonaka Satoru
Saito Teiichiro
Deeth Williams Wall Llp
Nippon Welding Rod Co. Ltd.
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