Laser cutting method of coated steel sheet, laser cutting processing product, heat cutting processing method, heat cutting processing product, surface treated steel plate, laser cutting method and laser processing head

摘要

As a method of laser cutting a coated steel sheet, it is preferable that when the laser beam LB is irradiated to the upper surface of the coated steel sheet W to perform laser cutting processing of the coated steel sheet, the laser beam LB is melted and / Containing metal layer is flowed to the cut surface of the plated steel sheet W by the assist gas ejected to the laser machining portion of the plated steel sheet and the cut surface is coated with the plating layer containing metal.