AN EXPERIMENTAL STUDY OF LASER ASSISTED ARC WELDING

Authors
  1. Magee, K.H.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Laser Inst, Edmonton ALTA (CAN)
Abstract
High power lasers can be used to produce high quality, distortion free, single pass welds in thick steel plate. However, lasers with sufficient power to produce deep penetrating welds can be expensive. The capital cost can be reduced by employing laser assisted arc welding; a hybrid process which combines inexpensive arc welding energy with more costly, but highly controllable laser energy. The process parameters for laser assisted gas metal arc welding (LAGMAW) of thick steel plate have been investigated using bead on plate welding trials, and by producing welds in a variety of V-grove configurations. The investigation has resulted in the development of a four pass welding procedure than can successfully weld 25 mm thick steel plate using approximately 5kW of laser power, combined with sufficient GMAW energy to produce a LAGMAW heat input of 1.6 kJ/mm for each pass. The process has been applied to HY80 plate typically used in submarine hull construction. Welds produced in this material contained a predominately martensitic microstructure.
Keywords
LAGMAW;GMAW
Report Number
DREA-CR-93-430 — Contractor Report
Date of publication
31 Mar 1993
Number of Pages
49
DSTKIM No
94-02652
CANDIS No
141193
Format(s):
Hardcopy;Originator's fiche received by DSIS

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