A1 Journal article (refereed), original research

Welding of thick austenitic stainless steel using Nd:yttrium-aluminum-garnet laser with filler wire and hybrid process


LUT Authors / Editors

Publication Details
Authors: Jokinen Tommi, Karhu Miikka, Kujanpää Veli
Publisher: Laser Institute of America
Publication year: 2003
Language: English
Related Journal or Series Information: Journal of Laser Applications
Volume number: 15
Issue number: 4
Start page: 220
End page: 224
Number of pages: 5
ISSN: 1042-346X
eISSN: 1938-1387
JUFO-Level of this publication: 0
Open Access: Not an Open Access publication

Abstract

Autogenous laser welding has shown many advantages over traditional welding
methods in numerous applications. However, there could be even more
applications, but due to the power levels of present high power lasers,
depth of penetration is limited. One way to overcome this limitation is
to use multipass laser welding,
in which a narrow gap and a filler wire are applied. By this process
thick sections can be welded with a smaller heat input and therefore
with smaller distortions, and the process seems to be very effective
compared to “traditional” welding
methods. Another way to increase penetration and fill the groove is by
using the so-called hybrid process, in which laser and GMAW are
combined. In this study thick section austenitic stainless steel is
welded using a multipass technique with filler wire, and also by
utilizing a hybrid process. For narrow gap conditions, groove angles of 8°," role="presentation">8°, 10°," role="presentation">10°, and 12°," role="presentation">12°,
are used with a partially grooved V joint. Parameters (e.g, filler wire
feeding, placement of wire, and arc) are varied. Results of the
experiments are presented and phenomena of the process, as well as
reasons for weld defects, are pointed out.


Last updated on 2019-04-12 at 09:36

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