Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
OBTAINING NITROGEN MARTENSITE IN INTERSTITIAL FREE STEEL ENRICHED WITH CHROME
Submission Author:
euclides alexandre bernardelli , PR
Co-Authors:
Marcio Mafra, Felipe Augusto de Aguiar Possoli, Sabrina Rodrigues Meira, Paulo César Borges
Presenter: Sabrina Rodrigues Meira
doi://10.26678/ABCM.COBEF2017.COF2017-0885
Abstract
Nitrogen martensite was produced by Solution Heat Treatment after Plasma Nitriding (SHTPN) process in interstitial-free steel samples enriched with chrome and treated. Pure iron samples were also treated for comparison. The SHTPN process consisted of a nitriding at 510°C for 2h, followed by a solution treatment and oil quenching. Three solution treatment temperatures (800, 900 and 1000°C for 15 minutes) were studied. Samples were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Vickers microhardness testing. Results show that chrome presence increases the thickness of the nitrided layer, resulting in thicker and more homogenous layers after the solubilization. In other hand, chrome-rich surfaces have presented increases in porosity. Despite of the better diffusion of the nitrogen, higher solution temperatures promotes the emergence of heterogeneous layer.
Keywords
nitrogen martensite, SHTPN, chrome enrichment, IF Steel, plasma nitriding
