Study on Recrystallization Rule of Deformed Austenite in Low Carbon Low Alloy Steel
The recrystallization rule of deformed austenite in low carbon low alloy steel containing Mn,Ni,Mo,Nb,Cr,and V was investigated by optical microscope using the stepped specimen.The effects of process parameters,including rolling temperature and reduction,on the recrystallization fraction of deformed austenite were analysed.The figure of deformed austenite recrystallization of tested steel was drawn.The results indicate that the complete recrystallization of tested steel occurs under the conditions of the reduction of 50%and the rolling temperature of 1050 ℃ or the reduction of 70%and the rolling temperature of 1000 ℃.Therefore,the rolling temperature in recrystallization region should be above 1000 ℃,the multi-pass accumulative reduction is more than 60%;while the rolling temperature in non-recrystallization region should be below 950 ℃,the first-pass deformation ranges from 15%to 20%.