Study on Paint Layer Removal from EA4T Steel Axle by Continuous Wave Laser
The experimental study on the fiber laser stripping surface coating of EA4T steel axle was carried out.The mechanism of laser peeling was analyzed.The effects of laser power density,scanning speed,filling spacing and other parameters on the peel quality and efficiency were studied.The results show that laser overscan twice is suitable:for the first overscan,the power density is 2.25×106 W/cm2,the scanning speed is 16 m/s,and the filling spacing is 0.1 mm;for the second overscan,the laser power density is 2.25×106 W/cm2,the scanning speed is 16 m/s,the filling spacing is 0.2 mm,and the efficiency is 0.8 m2/h.After the first laser overscan,there is some paint residue left;and then the second overscan can effectively peel the paint coating.It would result in the EA4T steel surface micro-melting;however,its main mechanical properties are not obviously affected.
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