Induction Heating in Underwater Wet Welding-Thermal Input, Microstructure and Diffusible Hydrogen Content

• Published in: Materials Vol. 15; no. 4; p. 1417
• Main Authors: Brätz, Oliver, Klett, Jan, Wolf, Thomas, Henkel, Knuth-Michael, Maier, Hans Jürgen, Hassel, Thomas
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 14.02.2022; MDPI
• Subjects: Carbon equivalent; Carrier gases; Diffusion welding; Environmentally assisted cracking; Extraction; fine-grained construction steel; Heat; Heat affected zone; High strength steels; Hydrogen; hydrogen analysis; hyperbaric wet welding; Induction heating; Methods; Microstructure; Post-weld heat treatment; preheating; Simulation; Structural steels; Underwater welding; Water depth; Weld metal; Weldments; Workpieces; hydrogen analysis; underwater technology; induction heating; hyperbaric wet welding; fine-grained construction steel; post-weld heat treatment; preheating

Hydrogen-assisted cracking is a major challenge in underwater wet welding of high-strength steels with a carbon equivalent larger than 0.4 wt%. In dry welding processes, post-weld heat treatment can reduce the hardness in the heat-affected zone while simultaneously lowering the diffusible hydrogen c...