S. Aggoune1, E.H. Amara1, M. Debiane2
FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.1, pp. 61-75, 2013, DOI:10.3970/fdmp.2013.009.061
Abstract The effects of inert assisting gas nature and velocity on laser cut quality are investigated. A pure fusion cutting process just above melting point is considered, where the molten steel velocity is given as a function of the two acting forces represented by the pressure gradient and the frictional forces applied by the laminar gas flow. In the case of nitrogen assisting gas, the stainless steel melt film exhibits a visible separation point. The point where the melt flow is separated out from the solid wall depends strongly on the gas velocity. It is pushed down the cut surface when… More >
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