Technical Information Guide for Narrow-Gap Improved Electroslag Welding:Metallurgical Background for Narrow-Gap Improved Electroslag Welding Procedure

摘要

The document 'Technical Information Guide for Narrow-Gap Improved ElectroslagWelding' is intended for welding and metallurgical engineers involved in fabrication of bridge components using the NGI ESW process. The technical information provided in this document is based on FHWA Report No. FHWA/RD-87/026. This document contains scientific and technical information on the role of welding variables in the NGI ESW process, and relationships between grain structure, microstructure, and properties of the weld and the heat-affected zone, including Charpy V-notch and fracture toughness, and fatigue. This document provides metallurgical background for modifications to standard ESW practice that improve toughness and fatigue performance of electroslag welded joints.