Photo from wikipedia
ABSTRACT The homogenisation (Stage III) of austenite during non-equilibrium heating of hypereutectoid steels has been characterised for the first time through dilatometric strain measurements and electron microscopic techniques. It has… Click to show full abstract
ABSTRACT The homogenisation (Stage III) of austenite during non-equilibrium heating of hypereutectoid steels has been characterised for the first time through dilatometric strain measurements and electron microscopic techniques. It has been found that the homogenisation temperature (Ach) is significantly higher than the cementite dissolution temperature (Acm). Though there is a complete conversion of low-temperature constituents to austenite above the Acm, a significant segregation of carbon in the austenite is observed below the Ach. Performing heat treatment with an incomplete austenitisation between the Acm and the Ach temperature can affect the subsequent on-cooling phase transformations. It is proposed that the Ach temperature should be used as the full austenitisation temperature in hypereutectoid steels.
Journal Title: Materials Science and Technology
Year Published: 2018
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!