Effect of Isothermal treatments parameters on Nanostructured Bainite transformation
2019
Ruiz-Jiménez, Víctor | Jiménez, José Antonio | García Caballero, Francisca | García Mateo, Carlos | Sidenor | European Commission | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
Nanostructured bainitic steels have a microstructure consisting of nanosize baintic ferrite plates interwoven with thin films of carbon enriched retained austenite. Such microstructure can be obtained in specially designed steels inhibiting the precipitation of cementite during isothermal transformation at low temperatures, between 150 - 350ºC, by the addition of a high Si content (1.5 – 2 wt. %). In this work, the evolution of bainitic transformation in two high silicon steels was studied between 300 and 350ºC, by the complementary use of High Resolution Dilatometry, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The influence of different heat treatments parameters, i.e. isothermal temperature and time, on the phase fraction and their chemical compositions, as well as austenite thermal stability has been studied as a function of the transformation degree.
显示更多 [+] 显示较少 [-]The authors gratefully acknowledge the support of Sidenor S.A. for providing the material used in this work. The authors also acknowledge the support by the European Research Fund for Coal and Steel under the contract RFCS-2016-754070 and the supports of the following laboratories at CENIM: X-Ray diffraction, Metallography and Phase Transformations.
显示更多 [+] 显示较少 [-]