Excimer laser surface treatment of a S.G. cast iron : possible application for the running-in part of the automotive motors
In: Excimer Lasers ISBN: 9789048143955; (1994)
Online
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Zugriff:
After the final machining on S.G. cast iron, a thin layer of the matrix material recovers the graphite spherulites. This layer has been selectively removed on the graphite nodules using a KrF excimer laser. The plasma created on the surface generates shock waves, which harden the bulk material on nearly 10 µm and which by reflecting on the spherulites, are pushing away the molten metal forming craters. The molten layer resulting from the treatment has an extremely fine microstructure and is harder than the matrix, with a roughness slightly higher to that of the initial surface. Preliminary wear tests show that the friction coefficient appears to be lower than that of the untreated material, because of the surface properties modifications and because of the opened spherulites which are acting like oil reservoirs. A mathematical modelling is presented in order to calculate the roughness of the treated surfaces. It shows rather good accordance with experimental measurements, taking into account the laser working parameters.
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Excimer laser surface treatment of a S.G. cast iron : possible application for the running-in part of the automotive motors
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Autor/in / Beteiligte Person: | Tissandier, A. ; Hontzopoulos, E. ; Pantelis, D.I. ; Manousaki, A. |
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Quelle: | Excimer Lasers ISBN: 9789048143955; (1994) |
Veröffentlichung: | Springer Netherlands, 1994 |
Medientyp: | unknown |
ISBN: | 978-90-481-4395-5 (print) |
DOI: | 10.1007/978-94-015-8104-2_26 |
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