| 摘要 |
<p>Provided is a flux cored wire electrode for arc welding, being capable of carrying out highly efficient welding process at all positions, particularly for vertical welding and overhead welding, and having excellent toughness down to a temperature of about -40 DEG C. A flux cored wire electrode for arc welding comprises a flux filled in the steel housing, wherein the contents of TiO2, Ti, Mg, Al, B, Mn, Si, K, and Na are at least 3.0 to 10.0 % by weight, 2 to 8 % by weight, 0.1 to 0.8 % by weight, not more than 0.5 % by weight, 0.001 to 0.03 % by weight, 1.0 to 4.0 % by weight, 0.5 to 3.0 % by weight, 0.001 to 0.5 % by weight and 0.001 to 0.5 % by weight, respectively, to the total weight of the wire electrode, and wherein Mg, B, Ti, Mn, K, Na, and Si, contained in the wire electrode satisfy the formula 0.5 </= (Mg + 100 x B + 0.1 x Ti + 0.1 x Mn + K + Na)/ Si </= 5.0; and additionally wherein the whole water content should be defined within a range of 20 to 1,000 ppm (measured at 750 DEG C in O2 atmosphere by KF method) as the ratio to the total wire electrode weight, the contents of Ti, Mg, Al, B, Mn, Si, K and Na being expressed as total element included in the corresponding metal, alloy, and compounds.</p> |
