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In this study, a laser heating system was used as a preheating source during the friction stir welding of 3.2mm thick S45C steel plates. The position of the laser focal point exerted a different preheating effect on the microstructure and mechanical properties of the welds. When the laser beam was focused just at the joint line and 10mm ahead of the rotating tool, the maximum welding speed can reach...
Cladding is the process of depositing a superior built-up layer by fusion on a substrate. In blown powder laser cladding process, the powder travels across the laser path, gets heated up by absorbing laser energy, and finally melts on the substrate under the intense laser beam; as the substrate moves away this melt pool solidifies to form a continuous built-up layer. The laser energy is partly absorbed...
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