Authors: Atanu Saha Dipak Kumar Mondal Joydeep Maity
Publish Date: 2010/04/27
Volume: 20, Issue: 1, Pages: 114-119
Abstract
In this work an annealed 06 wt carbon steel was subjected to cyclic heat treatment process that consisted of repeated shortduration 6 min holding at 810 °C above Ac3 temperature followed by cooling in a flowing air medium flow rate 6 m3/h After 8 cycles about 1 h and 20 min the microstructure mostly contains spheroidized cementite and ferrite along with trace amount 3 of pearlite In addition to the diffusion within lamella the disintegration of lamellae through dissolution of cementite at preferred sites of lamellar faults during shortduration holding above Ac3 temperature and the generation of defects lamellar faults during nonequilibrium cooling in a flowing air medium are the main reasons of accelerated spheroidization
Keywords: