Effect of Deformation Temperature on Low∑CSL Grain Boundary Content of 06Cr23Ni13 Stainless Steel

The hot deformation behavior of the 06Cr23Ni13 stainless steel at different deformation temperatures and strain rates of 0.01 s^-1 is studied by Gleeble-3500 instrument, and the effect of deformation temperature on grain boundary content of low coincidence lattice (CSL) is investigated. The results show that the recrystallization degree of the 06Cr23Ni13 stainless steel increases with the increase of deformation temperature. When the deformation temperature is 1 150 ℃, the recrystallization degree of microstructure is the highest, and the austenitic grain is equiaxed. According to the statistics of special grain boundaries of the 06Cr23Ni13 stainless steel under different deformation temperatureby Channel 5 software, the content of the low ∑CSL grain boundaries increases firstly and then decrease with the increase of the dynamic recrystallization degree during the hot deformation process, which reaches its maximum at 1 150 ℃. The low ∑CSL grain boundaries of the 06Cr23Ni13 stainless steel are mainly composed of ∑3, ∑9 and ∑27 grain boundaries.