Laser surface hardening of gray cast irons

Authors

  • A. L. Maco Dpto. de Materiales. E.T.S.I. Industriales. Campus Universitario (Univ. de Oviedo)
  • F. J. Belzunce Dpto. de Materiales. E.T.S.I. Industriales. Campus Universitario (Univ. de Oviedo)

DOI:

https://doi.org/10.3989/revmetalm.1998.v34.i2.674

Keywords:

Laser hardening, Gray cast irons, Surface treatment, Microstructural modification, Surface hardness

Abstract


Three different ferritic-pearlitic gray cast irons have been laser hardened. The influence of laser power density and scanning speed on their microstructural modification, affected depth and surface hardness have been evaluated. It was observed that when the laser energy density surpasses a certain critical value, a surface layer melts and a ledeburitic microstructure of very high hardness is obtained. Below it, a second layer of martensitic microstructure also of high hardness, is produced.

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Published

1998-04-30

How to Cite

Maco, A. L., & Belzunce, F. J. (1998). Laser surface hardening of gray cast irons. Revista De Metalurgia, 34(2), 126–130. https://doi.org/10.3989/revmetalm.1998.v34.i2.674

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