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Development of ultra-fine grained dual phase microalloyed steels through severe cold rolling and intercritical annealing
Published in
Volume: 64
Issue: 1-2
Pages: 89 - 92
A Nb-microalloyed structural steel with ferrite-pearlite microstructure was subjected to cold rolling and intercritical annealing to produce ultra-fine grained dual phase microstructure. Optical and transmission electron microscopy techniques were employed to characterise the microstructure. Initial results showed that the intercritical annealing (at 790°C for 90s) of samples rolled to a true strain of 2.4 resulted in a significant grain refinement from the average initial grain size of 20 μm to 1-2 microns. The microstructure primarily consisted of UFG ferrite matrix with homogeneously distributed islands of plate martensite with volume fraction of 27%. © 2011 Indian Institute of Metals.
About the journal
JournalTransactions of the Indian Institute of Metals
Open AccessNo