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Possibilities with use of electron beam welding of very high strength steel
KTH.
2018 (English)In: Mater. Sci. Forum, Trans Tech Publications Ltd , 2018, p. 443-452Conference paper, Published paper (Refereed)
Abstract [en]

Welding of very high strength steels quenched and tempered steel, Rp0.2 > 700 MPa, put high demands on choice of weld process, consumables and also the heat input used. Such steels commonly have a quite narrow tolerance box for a suitable weld heat input to control the cooling time t 8/5 pertaining to minimize risk for generating weld defects such as undercut, too soft weld heat affected zone, delayed crack risk etc. When welding very high strength steel the cold cracking risk of the weld metal not is negligible due to the high alloy content of such filler wires. Filler metal of equal strength of the parent plate hard to find and under-matching filler wires are commonly used. The interest was directed towards electron beam (EB) welding because of the many new developments in the process recent years. The focus on laser welding technology has in a way moved the research work from (EB) welding. The need of vacuum chambers and restrictions in the manipulation of the EB gun is also factors which give problems in the industrialization of the process. Recent developments in manipulation of EB gun and workpiece generate new possibilities. The Electron Beam Weld process (EBW) has been used to study its possibilities when welding very high strength steel with respect to the cold crack risk of such weldments. The results demonstrate possibilities to achieve strength properties of the weldments of equal properties as has the parent plate, which makes further development/fine-tuning of the EBW-process necessary.

Place, publisher, year, edition, pages
Trans Tech Publications Ltd , 2018. p. 443-452
Keywords [en]
Advance Manufacturing, Electron Beam Welding, Thermec’2018, Very High Strength Steel
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-251778DOI: 10.4028/www.scientific.net/MSF.941.443ISI: 000468152500073Scopus ID: 2-s2.0-85064068846ISBN: 9783035712087 (print)OAI: oai:DiVA.org:kth-251778DiVA, id: diva2:1318612
Conference
9 July 2018 through 13 July 2018
Note

QC 20190528

Available from: 2019-05-28 Created: 2019-05-28 Last updated: 2019-10-24Bibliographically approved

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CiteExportLink to record
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  • apa
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