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Product Code: ICA12_1905

The Numerical Simulation of Heat Transfer During a Hybrid Laser-MIG Welding of Duplex Steel
Authors:
Issam Bendaoud, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Simone Mattei, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Eugen Cicala, Mechanical Engineering Faculty, Polytechnic Univ. of Timisoara; Timisoara Romania
Iryna Tomashchuk, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Henri Andrzejewski, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Pierre Sallamand, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Alexandre Mathieu, Laboratoire Interdisciplinaire Carnot de Bourgogne; Le Creusot France
Amelie Fanica, Centre de Recherche des Matériaux du Creusot, Arcelor Mittal France/Industeel; Le Creusot France
Presented at ICALEO 2012

The present study is dedicated to the numerical simulation of an industrial case of hybrid laser-MIG welding of high thickness duplex steel URANUS 52N with Y-shaped gap geometry. To represent the heat supply during the welding, the combination of conic and superficial Goldak and Gauss heat sources is used. Such an approach, which takes in account only conductive heat transfer, allows to find the exact shape of the melted zone and to determine the temperature field outside of the weld without detailed physics description, which is very complex. A numerical model was created in FEM software COMSOL Multiphysics. To optimize the heat sources formulation, the numerical exploratory experimental designs method was used. This method allowed us to study the sensibility of each analytical parameter of the heat sources on the final temperature field and to readjust them properly. The melted zone shapes of standalone laser, MIG and hybrid laser-MIG welds were validated by the comparison with cross-cuts of the welds, CCD camera imaging and thermocouple measurements taken in ten different positions. The model shows less than 9 relative error comparing to the experiment.

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