Laser-assisted double-wire welding with a nontransferred arc is used for cladding workpieces. The wire material is melted by an arc and dropped onto the substrate, where a laser beam is oscillated by a galvanometer scanner to achieve bonding of the melt with good contact angles that do not result in undercuts. In this study, the galvanometer scanner was replaced by a beam shaping optics generating a line with a width of 1.2 mm and a length of 9.1 mm. Based on Design of Experiments, the laser power was varied in a range from 1500 to 2000 W and the welding speed in a range from 600 to 800 mm/min. Single weld beads of AISI 316L were welded onto a mild steel of AISI 1024 according to a full factorial design at three repetitions per parameter set. The paper examines whether the contact angles of the weld beads produced with the line optics are comparable to those obtained by oscillating the laser beam. In addition, the dilution of the material with the substrate was determined in micrographs. The results show that the bonding to the substrate can be achieved. The parameter window for the laser power with beam shaping line optics is different from that with the oscillated laser beam. The required laser power is 1.5–2 times greater.

1.
A.
Barroi
,
J.
Hermsdorf
,
U.
Prank
, and
S.
Kaierle
, “
A novel approach for high deposition rate cladding with minimal dilution with an arc–laser process combination
,”
Phys. Proc.
41
,
249
254
(
2013
).
2.
A.
Barroi
,
J.
Ameila
,
J.
Hermsdorf
,
S.
Kaierle
, and
V.
Wesling
, “
Influence of the laser and its scan width in the LDNA surfacing process
,”
Phys. Proc.
56
,
204
210
(
2014
).
3.
A.
Barroi
,
F.
Zimmermann
,
J.
Hermsdorf
,
S.
Kaierle
,
V.
Wesling
, and
L.
Overmeyer
, “
Evaluation of the laser assisted double wire with nontransferred arc surfacing process for cladding
,”
J. Laser Appl.
28
,
022306
(
2016
).
4.
T.
Bokelmann
,
M.
Tegtmeier
,
M.
Lammers
,
J.
Hermsdorf
,
S.
Kaierle
,
S.
Emadmostoufi
,
O.
Mokrov
,
R.
Sharma
, and
U.
Reisgen
, “
Influence of the laser beam parameters in the laser assisted double wire welding with nontransferred arc process on the seam geometry of generatively manufactured structures
,”
J. Laser Appl.
33
,
042044
(
2021
).
5.
Laserline GmbH
, see https://www.laserlines.co.uk/wp-content/uploads/2018/12/Laserline_OTZ_Zoom_Optics.pdf for “OTZ Zoom Optics Always the Perfect Spot – Dynamics at the Workpiece” (
2018
).
6.
F.
Klocke
,
M.
Schulz
, and
S.
Gräfe
, “
Optimization of the laser hardening process by adapting the intensity distribution to generate a top-hat temperature distribution using freeform optics
,”
Coatings
7
,
77
(
2017
).
7.
K.
Parker
, see https://www.photonics.com/images/Web/WhitePapers/248/Cladding_with_High_Power_Diode_Lasers.pdf for “Cladding with high power diode lasers” (
2010
).
8.
S.
Brookshier
,
J.
Washko
,
K.
Parker
,
F.
Gaebler
, and
W.
Juchmann
, “
The use of novel, direct diode lasers for large area hard-facing and high deposition rate cladding to enhance surface wear and corrosion resistance
,”
Proc. SPIE
8239
,
82390H
(
2012
).
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