Laser burnishing method for surface layer modification

Abstract The results of experiments on the application of a new hybrid method that combines laser melting treatment with burnishing in hot conditions are presented. Both treatments were performed on the laser station in one operation. The experiments were done on carbon steel C45. The process was pe...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture Journal of engineering manufacture, 2008-07, Vol.222 (7), p.817-825
Main Authors: Radziejewska, J, Nowicki, B, Kalita, W
Format: Article
Language:English
Subjects:
Applied sciences
Burnishing
Carbon dioxide
Cracks
Deformation mechanisms
Exact sciences and technology
Experiments
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Grains
Hardening
Industrial metrology. Testing
Laser beam melting
Lasers
Maximum power
Mechanical engineering. Machine design
Metals. Metallurgy
Microhardness
Microstructural analysis
Microstructure
Physics
Process parameters
Production techniques
Solid mechanics
Structural and continuum mechanics
Surface hardening by mechanical treatment
Surface layers
Surface roughness
Surface treatment
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Summary:Abstract The results of experiments on the application of a new hybrid method that combines laser melting treatment with burnishing in hot conditions are presented. Both treatments were performed on the laser station in one operation. The experiments were done on carbon steel C45. The process was performed with a CO2 laser of 2.5 kW maximum power at different parameters. Experiments on the influence of burnishing process parameters on surface layer properties were conducted. The results of measuring the roughness, microstructure, and microhardness of the surface layer after laser hardening and after laser hardening combined with microhammering are presented. The microhammering treatment leads to a decrease in surface roughness of about 40 per cent, compared with laser hardening alone. Neither cracks nor spallings were observed. Microstructural analysis has shown that the burnishing process causes deformation of grains and increased microhardness of the material of the surface zone.
ISSN:0954-4054
2041-2975
DOI:10.1243/09544054JEM1066