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Surface remelting of cast iron camshafts by CO2 laser radiation

: Zwick, A.; Gasser, A.; Kreutz, E.W.; Wissenbach, K.

Bergmann, H.W.; Kupfer, R. ; Arbeitsgemeinschaft Wärmebehandlung und Werkstofftechnik e.V. -AWT-:
Laser beam hardening. ECLAT '90. Proceedings
Witzmannsberg: EMS Europ. Media Service, 1990
European Conference on Laser Treatment of Materials (ECLAT) <3, 1990, Erlangen>
Conference Paper
Fraunhofer ILT ()
absorptivity; cast iron camshaft; CO2-laser radiation; energy coupling; form stability; globular/lamellar cast iron; ledeburitic layer; remelting process; wear property

Cast iron cams of assembled camshafts are remolten by CO2 laser radiation to enhance the wear properties by producing a ledeburitic layer. The investigations are performed on four different globular and lamellar cast irons. To improve the process efficiency the application of beam shaping optics and possibilities to increase the absorptivity during the remelting process are studied. The influence of different process parameters concerning beam shaping and energy coupling (different surface preperations, polarized laser radiation) on the processing results (remelting geometry, form stability, structure, processing time) are investigates for the remelting of camshafts.