Covered arc-welding electrode

Details Covered arc-welding electrode Covered arc-welding electrode

B - Operations, Transporting

23

K

327/114

B23K 35/22 (2006.01) B23K 35/30 (2006.01) B23K 35/36 (2006.01)

Patent

CA 1275308

ABSTRACT OF THE DISCLOSURE A covered arc welding electrode includes a steel core wire and a flux which is applied to the outside periphery of said steel core wire. The welding electrode can form a superior crack-resisting weld zone even if fluctuating stresses are continually applied to a base metal while the base metal is welded. The flux includes 40 to 60 % metal carbonate, 10 to 25 % metal fluoride and 4 to 25 metal oxide by weight. The flux comprises 24 to 32 % of the total weight of said electrode. The composition of the welding electrode includes 0.005 to 0.05 % carbon. 0.1 to 1.1 % silicone, 1.5 to 2.5 % manganese, not more than 0.007 % sulfur and not more than 0.25 % nickel by weight and the manganese/sulfur ratio is more than or equal to 350 to 1. In addition, the welding electrode can include 0.01 to 0.10% rare earth metal by weight. In which case, the Mn content may be 1.0 to 2.5 % by weight and the manganese/sulfur ratio may be more than or equal to 270 to 1. In addition, the composition of the welding electrode can include titanium and zirconium, the total content of which may be less than or equal to 1.2 % the total weight of the electrode, and/or aluminum and magnesium, the total content of which may be less than or equal to 1.2 % of the total weight of the electrode.

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