University of Oulu

Markku Keskitalo, Mikko Hietala, Kari Mäntyjärvi, The Influence of Shielding Gas Configurations on Formability of the Ferritic Stainless Steel Laser Weld, Physics Procedia, Volume 89, 2017, Pages 80-88, ISSN 1875-3892, https://doi.org/10.1016/j.phpro.2017.08.008

The influence of shielding gas configurations on formability of the ferritic stainless steel laser weld

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Author: Keskitalo, Markku1; Hietala, Mikko1; Mäntyjärvi, Kari1
Organizations: 1University of Oulu, Kerttu Saalasti institute, Pajatie 5, 85500 Nivala
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202103248287
Language: English
Published: Elsevier, 2017
Publish Date: 2021-03-24
Description:

Abstract

According to previous studies the careful argon shielding of the weld is very important in order to achieve a ductile and formable laser weld of Ti-stabilized ferritic stainless steel. In practice it is often difficult to use the root gas shielding of the laser weld. The aim of this study was to determine the sufficient practise of gas shielding in order to achieve the ductile laser weld. According to Erichsen formability results the shielding gas nozzle in the post weld side must be used in order to reach the good formability of the laser weld. The single shielding gas pipe before the weld is not a sufficient method for the gas shielding. There is no need to use root gas in order to achieve a ductile weld. The single shielding gas pipe before the weld can cause a uptake blast in the key hole and further oxidize the weld metal.

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Series: Physics procedia
ISSN: 1875-3892
ISSN-E: 1875-3892
ISSN-L: 1875-3892
Volume: 89
Pages: 80 - 88
DOI: 10.1016/j.phpro.2017.08.008
OADOI: https://oadoi.org/10.1016/j.phpro.2017.08.008
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The research was done during the KeKeRa -European regional development fund -project. We would also like to thank the private financiers of the KeKeRa-project.
Copyright information: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
  https://creativecommons.org/licenses/by-nc-nd/4.0/