The effect of laser beam wobbling mode in welding process for structural steels

A laser welding process using a 30-kW fiber laser with scanning mode optics is investigated in the paper. Welding is conducted in two ways: constant laser beam trajectory and wobbling trajectory with the use of lower speed and power. The main goal was to investigate the influence of the second wobbl...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2015-12, Vol.81 (9-12), p.1683-1691
Main Authors: Kuryntsev, Sergey V., Gilmutdinov, A. Kh
Format: Article
Language:English
Subjects:
Automobile industry
Bend properties
CAE) and Design
Computed tomography
Computer-Aided Engineering (CAD
Engineering
Fiber lasers
Impact analysis
Impact strength
Impact tests
Industrial and Production Engineering
Laser beam welding
Lasers
Mechanical Engineering
Mechanical properties
Media Management
Microhardness
Notch tests
Original Article
Structural steels
Trajectories
Two dimensional analysis
Visual control
Weld metal
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Summary:A laser welding process using a 30-kW fiber laser with scanning mode optics is investigated in the paper. Welding is conducted in two ways: constant laser beam trajectory and wobbling trajectory with the use of lower speed and power. The main goal was to investigate the influence of the second wobbling laser welding pass on microstructure and mechanical properties of structural steel. The following parameters were monitored: visual control and mechanical properties (microhardness, three-point bend, and Charpy impact V-notch test); metallographic analysis and 2D and 3D computer tomography (CT) were also done. The results show that after the second welding pass, with wobbling trajectory of laser beam, middle and cap parts of the seam have a lower microhardness, in relation to the root part. It can be explained by annealing influence of the second wobbling pass at weld metal.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-7312-y