Effect of high temperature deformation on the perlite transformation and pearlite colony size was investigated.The results show that high temperature deformation makes both the nucleation and growth rates of pearlite increase,leading to the increase of phase transformation rate from austenite to pearlite.The deformation on austenite also refines the pearlite colony and makes its distribution evenly.The percentage of transformed pearlite is increased from 11％of the specimen without deformation to 32％and 53％of the specimens with 20％and 40％deformations,respectively,when the pearlite transformation time is 3 s.Pearlite colony size is decreased from 53.2 µm of the undeformed specimen to 37.8 μm and 23.1 μm of the specimens with 20％and 40％deformation,standard deviation is also decreased from 29.9 μm of the undeformed specimen to 11.8 µm and 7.9 μm of the deformed specimens.Higher rolling rate can be applied to the industrial production to decrease the pearlite colony size and its standard deviation of the LX80A high carbon steel wire rod in order to improve its drawability.
high carbon steelhigh temperature deformationpearlite colonynucleation and growth rates
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