OBRABOTKAMETALLOV technology Vol. 26 No. 2 2024 layer penetration depth decreases due to the decrease in the specific laser energy during the cladding process. Increasing the powder consumption and laser spot size decreases the layer penetration depth for a similar reason (Fig. 8, 9). In the specimens at the minimum scanning speed, as well as at high powder consumption, cracks caused by tensile stresses were formed at the interface between the melted material and the substrate (Fig. 10). a b c Fig. 6. Cross sections of tracks produced at a power of 1,250 W, speed 25 mm/s, powder consumption 12 g/min, laser spot size 2.9 mm (a), 4.1 mm (b), 5.6 mm (c) Fig. 8. Dependence of penetration depth on powder consumption at a power of 1.250 W, scanning speed 25 mm/s, laser spot size 2.9 mm Fig. 9. Effect of changing the size of the laser spot on the penetration depth at a power of 1.250 W, speed 25 mm/s, powder flow rate 12 g/min Fig. 7. Change in penetration depth with varying power and build-up speed, laser spot size 2.9 mm, powder consumption 24 g/min
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