INVESTIGADORES
LANERI Karina Fabiana
artículos
Título:
Study of the Austempering Transformation Kinetics in Compacted Graphite Cast Irons
Autor/es:
R. GREGORUTTI; K. LANERI; J. DESIMONI; R. MERCADER
Revista:
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Editorial:
SPRINGER
Referencias:
Año: 2004 vol. 35 p. 103 - 110
ISSN:
1073-5623
Resumen:
In this work, the phases involved in the transformation austenite→ferrite+high-carbon austenite in cast irons were assessed by means of Mössbauer spectroscopy and hardness measurements for samples austempered at five different temperatures between 573 and 673 K with two Mn contents. The C content in the high-carbon austenite was found to have a dependence of t 0.40±0.05 on the austempering time t, which evidences that diffusion of carbon has taken place. The kinetic parameter k determined using the Johnson-Mehl-Avrami equation has a maximum of 3.9×10−3 (s−1) at ≈623 K and corroborates that Mn slows the transformation rate.
