Abstract：Conventional austenitic hotrolled and ferrite hotrolled of ultralow carbon bake hardening steels are completed in the lab. Microstructures observed by optical microscope and mechanical properties which completed on the MTS810 in different process were examined and compared. By contrast, we can conclude that all property parameters are eligible except value. The reason for lower value is considered as solution carbon is more in ferrite hotrolled than conventional austenitic hotrolled. But the concrete season needs further study. However, by proper annealling process hot rolling in ferrite region can product satisfying ULCBH steel.
