High strength cored wire weld metal hydrogen content, and weld metal cracking
- Royal Inst. of Tech., Stockholm (Sweden). Dept. of Welding Technology
- Gansu Univ. of Technology, Lanzhou (China). Dept. of Welding
Cored wires for high strength steel were tested for weld metal cracking with the G-BOP (Gap Bead on Plate) test. In all, 29 wires were gathered to yield rather a broad mixture of types and strength levels. Ten rutile, twelve basic flux cored wires, and seven metal cored wires were tested. G-BOP testing was performed at ambient but also at higher temperatures so that the preheating temperature could be evaluated. Gas shielding was used, wire diameter being 1.2 and 1.6 mm. Strength class of the wires varied from AWS E70 up to AWS E110. Altogether some 180 welds were studied for weld cracking, cracked bead area ranging from 2 to 100%. The 10% cracking preheat temperature, i.e., the temperature that might be recommended for practical welding ranged from ambient up to 150 C, at an arc energy of 1 kJ/mm. Distinct correlations were found between hydrogen content, weld metal carbon equivalent, heat input and tendency for cracking. Thus, from a weld metal cracking point of view, preheat and interpass temperatures must be considered important when going to low E{sub w} steels, like spray cooled TMCP steels, QT steels and the like. Hydrogen content varied from 1.45 ml/100 g of as deposited weld metal up to 14.8 ml/100 g, rutile wires yielding the highest hydrogen content. Weld metals within the strength classes AWS E90 to AWS E110 generally have low hydrogen content and basic flux formulation.
- OSTI ID:
- 33188
- Report Number(s):
- CONF-930641-; ISBN 0-7918-0785-1; TRN: IM9518%%9
- Resource Relation:
- Conference: OMAE `93: 12th international conference on offshore mechanics and arctic engineering, Glasgow (United Kingdom), 20-24 Jun 1993; Other Information: PBD: 1993; Related Information: Is Part Of OMAE 1993: Volume 3, Part A -- Materials engineering; Salama, M.M.; Toyoda, Masao; Liu, S.; Dos Santos, J.F.; Kocak, M.; Williams, J. [eds.]; PB: 434 p.
- Country of Publication:
- United States
- Language:
- English
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