Abstract: A numerical method is presented for analysing 2-dimensional
quasi-steady state heat transfer in high power density laser
keyhole welding processes. The mathematical model is established
according to the conservation of mass, momentum and energy.
Computation is performed by using the finite controlvolume
method in the curvilinear coordinate system. A position
prediction-correction procedure is employed to identify the
solid-liquid interface location. This method is applied to the
study of a typical keyhole welding process of an AISI 304
stainless steel plate and its feasibility is verified.
Key words: Laser
welding Heat transfer Keyhole Temperature distribution
*
This project
is supported by National Natural Science Foundation of China. Manuscript received on
September 15, 1997; revised manuscript January 5, 1998
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