Advertisement

Journal of Materials Science

, Volume 30, Issue 7, pp 1849–1853 | Cite as

Phase investigation in laser surface alloyed steels with TiC

  • S. Ariely
  • M. Bamberger
  • H. Hügel
  • P. Schaaf
Papers

Abstract

Laser technology enables melting and alloying specimen surfaces without the substrate itself being heated, whereby surfaces with special attributes are obtained with the properties of the substrate remaining unaffected. The surfaces of Armco iron and AISI 1045 steel were laser-alloyed with TiC powder, a CO2 laser of 2.5 kW maximum power being used. Optimal laser and powder-feed parameters were established. Particles of TiC were injected into the molten surface layer, forming a composite material, steel + TiC. The microstructures were investigated metallographically. Some of the particles had partially melted during their passage through the laser beam and had re-solidified, forming small and fine dendrites. Phase identification by X-ray diffraction revealed the presence of α-Fe, martensite, and Fe3C phases, as well as amounts of stochiometric TiC and unknown phases. Identification of phases by TEM and diffraction of electrons revealed the presence of unknown phases, such as tetragonal TiC and (FeTi)C. Mössbauer results show ternary Fe-Ti-C phases, which can be related to the TEM and X-ray diffraction results. A correlation was found between the substrate's composition, microstructures, and the different phases present.

Keywords

Microstructure Martensite Maximum Power Alloy Steel Phase Identification 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    L. Blaes, H.-G. Wagner, U. Gonser, J. Welsch and J. Sutor, Hyperf. Interact. 29 (1986) 1571.CrossRefGoogle Scholar
  2. 2.
    P. Schaaf, L. Blaes, J. Welsch, H. Jacoby, F. Aubertin and U. Gonser, ibid. 58 (1990) 2541.CrossRefGoogle Scholar
  3. 3.
    P. Schaaf, V. Biehl, M. Bamberger, Ph. Bauer and U. Gonser, J. Mater. Sci. 26 (1991) 5019.CrossRefGoogle Scholar
  4. 4.
    P. Schaaf, V. Biehl, M. Bamberger, G. Shafirstien, M. Langohr, F. Maisenhaelder and U. Gonser, in “Proceedings of the 5th Israel Materials Engineering Conference”, edited by M. Bamberger and M. Schorr (Freund Publishing House, London, 1991) pp. 451.Google Scholar
  5. 5.
    W. Kuendig, Nucl. Instrum. Meth. 75 (1969) 336.CrossRefGoogle Scholar
  6. 6.
    Ph. Bauer, O. N. C. Uwakweh and J. M. R. Genin, Hyperf. Interact. 41 (1988) 555.CrossRefGoogle Scholar
  7. 7.
    P. Schaaf, Ph. Bauer and U. Gonser, Z. Metallkde 80 (1989) 77.Google Scholar
  8. 8.
    U. Gonser, P. Schaaf and F. Aubertin, Hyperf. Interact. 66 (1991) 95.CrossRefGoogle Scholar
  9. 9.
    P. Schaaf, S. Wiesen and U. Gonser, Acta Metall. 40 (1992) 373.CrossRefGoogle Scholar
  10. 10.
    F. S. Richardson, “Physical Chemistry of Melts in Metallurgy” (Academic Press, London, 1974).Google Scholar
  11. 11.
    H. Othani, T. Tanaka, M. Hasebe and T. Nishizawa, CALPHAD 12 (1988) 225.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • S. Ariely
    • 1
  • M. Bamberger
    • 1
  • H. Hügel
    • 2
  • P. Schaaf
    • 3
  1. 1.Department of Materials EngineeringTechnion Israel Institute of TechnologyHaifaIsrael
  2. 2.IFSWStuttgart UniversityStuttgartGermany
  3. 3.II. Physikalisches Institut der Universität GöttingenGöttingenGermany

Personalised recommendations