An Evaluation of the use of Laser-Vibration Melting to Increase the Surface Roughness of Metal Objects

W1974386523 · 수집 2026-10-04 18:12:18

T13049 Surface Roughness and Optical Measurements

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Abstract This paper presents preliminary, experimental results of a new, hybrid method of increasing the surface roughness of metal objects. In this new approach, metal objects are melted with a mobile laser beam while they are being rotated. A vibration generator provides circular vibrations with an amplitude of 3 mm, and the vibration plane is perpendicular to the moving laser beam. The melting tests were performed using flat carbon steel samples at a predetermined frequency of circular vibrations. The effects of laser power and laser beam scanning velocity on the melted shapes were studied. All laser melting procedures were performed at a vibration frequency of 105 Hz. The melted samples were subjected to microscopic evaluation and the R a parameter, which characterises mean roughness, was measured using a profilometer. Melting metal samples with physically smooth surfaces (R a = 0.21 µm) resulted in surface structures of varied roughness values, with R a ranging from 5 µm to approximately 58 µm. The studies were undertaken to employ this technology for the purpose of passive heat exchange intensification of heating surfaces in practical applications.

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