In this type of laser cutting process, as the power density of the incident laser beam increases, when a certain value is reached, the interior of the EN 10025-2 S355JR steel plate at the point of illumination begins to evaporate and gradually form holes.
Once such holes are in place, large amounts of incoming beam energy can be quickly sucked in. The holes would then be surrounded by a wall of molten metal, and an auxiliary air stream coaxial with the beam would carry away the molten material around the holes.
At the same time, due to the movement of the EN 10025-2 S355JR steel plate, these holes will gradually move horizontally along the cutting direction of the laser cutting at the same time, thus forming a slit. At the same time, the laser beam will continue to shine along the leading edge of the slit, and the molten material will be continuously or pulsating blown away from the slit.
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