Bainitic transformation monitoring by a magnetic permeability method

Authors

  • J. L. Páez Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires
  • F. Fuentes Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires
  • R. Yep Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires
  • C. Duro Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires
  • R. Codina Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires
  • O. Alberio Laboratorio de Metalografía y Laboratorio de Aplicaciones Experimentales. Facultad de Ingeniería. Universidad de Buenos Aires

DOI:

https://doi.org/10.3989/revmetalm.1996.v32.i3.913

Keywords:

ADI, Austempering, TTT Diagram, Retained austenite, Bainitic transformation

Abstract


A system was developed which consists of an axial pump to stir the austempering liquid, and an L-C oscillator of a very low and checked amplitude level whose frequency depends on the coil test sample system. The test was performed at a temperature between 180 and 500 °C. Along the time, the austenite transformation of the sample changes the coil inductance, and so the system oscillation frequency. The frequency is measured by a four digits counter that has a time base precision supplied by a piezoelectric quartz crystal. So, the transformation is monitored as it is going on. An interface was constructed in order to make possible data to be downloaded to a computer in order to have an automatic measurement. To contrast the method a SAE 4140 steel was tested and good results were achieved.

Downloads

Download data is not yet available.

Downloads

Published

1996-06-30

How to Cite

Páez, J. L., Fuentes, F., Yep, R., Duro, C., Codina, R., & Alberio, O. (1996). Bainitic transformation monitoring by a magnetic permeability method. Revista De Metalurgia, 32(3), 180–184. https://doi.org/10.3989/revmetalm.1996.v32.i3.913

Issue

Section

NO_SECCION_SI_RESUMEN

Most read articles by the same author(s)