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

Archives of Metallurgy and Materials

B. Grabas¹ 

[1] CENTER FOR LASER TECHNOLOGIES OF METALS, KIELCE UNIVERSITY OF TECHNOLOGY, AL. TYSI?CLECIA PA?STWA POLSKIEGO 7, 25-314 KIELCE, POLAND;

关键词: Key words:: laser melting;    surface roughness;    laser treatment;    vibration;    nucleate boiling;   

DOI  :  10.1515/amm-2015-0005

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

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 Ra parameter, which characterises mean roughness, was measured using a profilometer. Melting metal samples with physically smooth surfaces (Ra = 0.21 µm) resulted in surface structures of varied roughness values, with Ra 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.

【 授权许可】

Unknown