Abstract
A novel laser cladding method assisted by in situ ultrasonic vibration is proposed in the present study. The laser cladded layer of 3540Fe/CeO2 is prepared on the 42CrMo substrate by the proposed laser cladding method. The effect of ultrasonic vibration applied angle on the microstructure evolution and mechanical properties of laser cladded coating is studied. The experimental results indicate that the application of ultrasonic vibration could improve the quality of the cladded layer. The ultrasonic vibration would refine the microstructure and homogenize the element distribution, which improves the micro-hardness of the cladded layer. The application of ultrasonic vibration is beneficial to decrease the friction coefficient and improve the wear resistant performance. The decreasing of the friction coefficient is the most obvious, when the applied angle of ultrasonic vibration is 45°.
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