Oxidizing Influence over Surface Structures and Properties for A3k Steel Nitrocarburized in Fluidized Bed

  • Nelu CAZACU "Dunarea de Jos" University of Galati, Romania
  • Sorin DOBROVICI "Dunarea de Jos" University of Galati, Romania
  • Adolf BÂCLEA Socomar SRL, Sorento, Italy
  • Victor TĂNĂSESCU S.C. Nalba S.R.L., Galaţi, Romania
  • Nelu PREDA Bristol International, Los Angeles, California, USA

Résumé

Surface duplex thermochemical treatment (oxinitrocarburizing) has principal scope to obtaining superficial mechanical higher properties with increasing corrosion capacity. The paper is based by oxinitrocarburizing experiments made in laboratory conditions over steel samples (low carbon steels, A3k). Active media for treatments was obtaining by ammonia, methane and air. Effective treatment was made in endothermic atmosphere, methane and ammonia that produced smooth fluidization. In a second stage o postoxidation at different time was made. The results of duplex surface treatments were investigated by superficial hardness (HV5) and by metallographic structure.

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Références

[1]. Nitrotec®, patented Surface Engineering Process for the treatment of steels and cast irons.
[2]. Roland A, Oxycad(R) NT en four a tapis. Nitrocarburation, oxydation, trempre, Traitement thermique, no. 346, Avr 2003. p. 37.
[3]. Popescu, N., Vitănescu,C., Tehnologia tratamentelor termice, Editura Tehnică, Bucureşti, 1974.
[4]. Cazacu N, Dobrovici S, Bâclea A, Tănăsescu V, Oxinitrocarburarea otelurilor în strat fluidizat aplicată oţelurilor cu conţinut scăzut de carbon/Fluidized Bed Oxinitrocarburizing Treatment For Low Carbon Steel.
Fascicle_9_2_2006
Publiée
2006-11-15
Comment citer
1.
CAZACU N, DOBROVICI S, BÂCLEA A, TĂNĂSESCU V, PREDA N. Oxidizing Influence over Surface Structures and Properties for A3k Steel Nitrocarburized in Fluidized Bed. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science [Internet]. 15nov.2006 [cité 2mai2025];29(2):7-1. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/3195
Numéro
Vol. 29 No 2 (2006)
Rubrique
Articles

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