Laser-assisted magnetorheological polishing of SLM-fabricated 316L stainless steel surface

A laser-assisted magnetorheological polishing device was used, which achieved flat polishing of SLM formed 316 L stainless steel by rotating the polishing head. Through orthogonal experiments, the effects of laser power, nozzle flow rate, polishing time, polishing gap, and spindle speed on polishing performance are comprehensively considered. The surface roughness of the samples before and after the experiment is measured, and signal-to-noise ratio analysis is utilized to determine the impact of independent variables on the polishing effect and to derive the optimal parameter combination. Experimental findings indicate that polishing time significantly influences surface roughness, followed by spindle speed, laser power, nozzle flow rate, and polishing gap; The optimal parameter combination is: polishing time of 40 min, spindle speed of 3600 rpm, laser power of 3 W, nozzle flow rate of 100 mL/min and polishing gap of 2 mm. Under this parameter combination, the sample exhibits the smoothest surface post-experiment.