摘要 |
A metal-core weld wire usable for gas shielded are welding gapless joints on low carbon and low alloy galvanized and galvanealed steels. The metal-core weld wire includes a low carbon steel sheat 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 percent C, and the core composition includes, by total weight of the metal-core weld wire, between approximately 0.05- 0.20 percent Ti. Between approximately 0.05 - 1.00 percent Nb, Fe powder, and Mn to the extent that the metal-core weld wire includes between approximately 0.1-1.0 percent Si. The core composition is, by total weight of the metal-core weld wire, between approximately 0.001-12.0 percent.The metal-core weld wire provides, at weld rates up to 150 cm(min. Reduced are ionization potential and spatter, and improved are 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. |