This paper presents experimental design approach to process parameter optimization for laser welding of martensitic AISI416 and AISI440FSe stainless steels in a constrained overlap configuration. To determine the optimal laser-welding parameters, a set of mathematical models were developed relating welding parameters to each of the selected weld characteristics. Both the statistical and the experimental validations for the models were confirmed. The weld quality criterion considered determining optimal parameters was the maximization of weld penetration depth and resistance length. Laser power and welding speed in the range of 855-930W and 4.50-4.65 m/min respectively with a fiber diameter of 300μm were identified as the optimal set of process parameters. However, reducing the laser power in the range 800-840W and increasing the welding speed in the range 4.75-5.37 m/min caused stronger and better welds.

Optimization of laser beam welding of stainless steels in overlap joint configuration

ROMOLI, LUCA;DINI, GINO
2011-01-01

Abstract

This paper presents experimental design approach to process parameter optimization for laser welding of martensitic AISI416 and AISI440FSe stainless steels in a constrained overlap configuration. To determine the optimal laser-welding parameters, a set of mathematical models were developed relating welding parameters to each of the selected weld characteristics. Both the statistical and the experimental validations for the models were confirmed. The weld quality criterion considered determining optimal parameters was the maximization of weld penetration depth and resistance length. Laser power and welding speed in the range of 855-930W and 4.50-4.65 m/min respectively with a fiber diameter of 300μm were identified as the optimal set of process parameters. However, reducing the laser power in the range 800-840W and increasing the welding speed in the range 4.75-5.37 m/min caused stronger and better welds.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/149311
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