With keyhole laser welding, the material is processed with very high beam intensities. Different to heat conduction welding, here a metal vapor is created additionally to the metal melt that partially displaces the melt, thereby leading to the creation of a vapor capillary (keyhole). This also applies for welding thick steel. The keyhole welding technique is characterized by a high process speed. The heat-affected zone is always limited, hence material distortion is accordingly low. What remains is a narrow, evenly structured welding seam with a depth-gauge that is often bigger than its width.
The advantages of a diode laser using the keyhole welding technique
A big plus of Laserline's diode lasers is the calm molten pool that minimizes the amount of metal splashes on the workpiece and laser optic which leads to smoother and cleaner welding seams. With a protection class of IP54, the lasers guarantee, even without protecting enclosures, process stability in tough application environments. Their high electrical efficiency of up to 50 percent and the robust technology make Laserline’s systems a reliable and very economical tool for keyhole welding. Designed for more than 30,000 operation hours, they are also very durable with low maintenance effort.