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Proceedings Paper

Hot cracking during laser welding of steel: influence of the welding parameters and prevention of cracks
Author(s): Marcel Schaefer; Steffen Kessler; Philipp Scheible; Nicolai Speker; Thomas Harrer
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Paper Abstract

In continuous wave keyhole-mode laser welding of high strength steel alloys hot cracking can occur. The hot crack susceptibility depends on the mutual interaction of several factors like the welding parameters, the alloy composition and the weld fixturing. In this paper we focus on the influence of the welding parameters and investigate the dependency of the laser power, the welding speed and the laser wavelength on the crack formation. X-ray images are used to visualize the hot crack patterns, which exhibit a pronounced periodicity. To influence the hot crack formation, the incident energy input into the process was adapted. For specific welding parameters, we show exemplarily the prevention of hot cracking by the use of a twin-spot optics.

Paper Details

Date Published: 22 February 2017
PDF: 8 pages
Proc. SPIE 10097, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI, 100970E (22 February 2017); doi: 10.1117/12.2254424
Show Author Affiliations
Marcel Schaefer, TRUMPF GmbH + Co. KG (Germany)
Steffen Kessler, TRUMPF Werkzeugmaschinen GmbH + Co. KG (Germany)
Philipp Scheible, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Nicolai Speker, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Thomas Harrer, TRUMPF Laser- und Systemtechnik GmbH (Germany)


Published in SPIE Proceedings Vol. 10097:
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI
Stefan Kaierle; Stefan W. Heinemann, Editor(s)

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