| 摘要 |
A metal-core weld wire usable for gas shielded arc welding gapless joints on low carbon and low alloy galvanized and galvanealed steels. The metal-core weld wire includes a low carbon steel sheath surrounding a core composition. In one embodiment, the low carbon steel sheath includes, by total weight of the metal-core weld wire, between approximately 0.01 - 0.03 % C, and the core composition includes, by total weight of the metal-core weld wire, between approximately 0.05 - 0.20 % Ti, between approximately 0.05 - 1.00 % Nb, Fe powder, and Mn to the extent that the metal-core weld wire includes between approximately 0.1 - 1.0 % Mn wherein the metal-core weld wire includes between approximately 0.1 - 1.0 % Si. The core composition is, by total weight of the metal-core weld wire, between approximately 0.001 - 12.0 %. The metal-core weld wire provides, at weld rates up to 150 cm/min, reduced arc ionization potential and spatter, and improved arc stability and shielding. The metal-core weld wire produces, at weld rates up to 150 cm/min, weld deposits having reduced blow holes and porosity, no liquid metal embrittlement, and reduced weld pool surface tension resulting in an improved wetting characteristic. |
