METHOD TO REDUCE SHRINKAGE DRIVEN DISTORTION WHEN WELDING ON PRESSURE PIPING AND VESSEL MATERIALS

摘要

A welding method is disclosed in which a structural weld overlay is re-oriented from a circumferential orientation to an axial orientation during deposition. The axial welding orientation provides a more favorable condition to prevent weld cracking and shrinkage distortion. The axial welding orientation also allows two or more weld machines to be used simultaneously so that two or more welding arcs can simultaneously deposit filler material or the overlay, thereby reducing the time required to complete the structural weld overlay.