Abstract
Safety of welded components made from high-strength materials is assured above all by the avoidance of hydrogen-assisted cold cracking which occurs during fabrication and may have effects during service. In this context, continuous advancement of the procedures and standards for hydrogen analysis is required. Exact determination of the weld metal diffusible hydrogen according to ISO DIS 3690 is therefore highly relevant as regards the welding and cooling parameters to be maintained. In the investigations presented in this paper, the influence of the welding process parameters and of the cooling parameters on the diffusible hydrogen content was examined and the procedures and parameters specified in ISO DIS 3690 for the weld specimen preparation were checked. The influence of cooling conditions, arc length and contact tube distance (CTD) on the weld metal hydrogen concentration was studied for a high-strength flux cored wire electrode and a high-strength solid wire electrode. Measurement of the diffusible hydrogen was carried out by means of carrier gas hot extraction using a sensitive and long-term stable thermal conductivity detector (TCD).
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References
Johansson B. and Collin P.: Eurocode for high strength steel and applications in construction. Proceedings “Super-High Strength Steels”: 1st international conference, Rome, Italy, CD-ROM, Associazione Italiana di Metallurgia, 2–4.11, 2005.
Johansson B.: Use and design of high strength steel structures, Revue de Métallurgie, 2003, no. 11, pp. 1115-1123.
DuPlessis J. and Du Toit M.: Reducing Diffusible Hydrogen Contents of Shielded Metal Arc Welds Through Addition of Flux-Oxidizing Ingredients, Journal of Materials Engineering and Performance, 2008, vol. 17, no.
ISODIS 3690, Welding and allied processes — Determination of hydrogen content in arc weld metal, II-E-586-10.
Pitrun M., Nolan D. and Dunne D.: Diffusible hydrogen content in rutile flux-cored arc welds as function 33 of the welding parameters, Welding in the World, 2004, Doc. IIW-1615, vol. 48, no. 1 /2, pp. 2–13.
Nolan D. and Pitrun M.: Diffusible hydrogen testing in Australia, Welding in the World, Doc. IIW-1616, vol. 48, no. 1/2, pp. 14–20, 2004.
Pitrun M.: The effect of welding parameters on levels of diffusible hydrogen in weld metal deposited using gas shielded rutile flux cored wires, PhD thesis, University of Wollongong, 2004.
Kannengiesser Th. and Tiersch N.: Comparative study between hot extraction methods and mercury method — A national round robin test, Welding in the World, Doc. IIW-2136, 2010, vol. 54, no. 5/6, pp. R 108.
Kannengiesser Th. and Tiersch N.: Measurements of diffusible hydrogen contents at elevated temperatures using different hot extraction techniques — An international round robin test. Welding in the World, Doc. IIW-2135, 2004, vol. 54, No. 5/6, pp. R 115.
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Kannengiesser, T., Lausch, T. Diffusible Hydrogen Content Depending on Welding and Cooling Parameters. Weld World 56, 26–33 (2012). https://doi.org/10.1007/BF03321392
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DOI: https://doi.org/10.1007/BF03321392