| 摘要 |
<p>A cored electrode and short arc welding system and a process for controlling the melting pulse of the system for depositing a special cored electrode so that no shielding gas is needed, are provided to satisfy the requirements for welding API(American Petroleum Institute) Grade X-80 line pipe or higher. A process of welding a workpiece comprises advancing a self-shielding electrode from a welding apparatus toward the workpiece, and performing a short arc welding process to weld the workpiece using the advanced self-shielding electrode, wherein the weld has a yield strength of at least 70 ksi. A welding apparatus comprises a short arc welding system for advancing a self-shielding electrode toward a workpiece to be welded, wherein the weld satisfies the requirements for welding at least API(American Petroleum Institute) Grade X-80 pipe and has a Charpy V-Notch toughness of at least 60J at -20 deg.C.</p> |
