Study on the surface cracking in hot-rolled plates of Fe-23Mn-2Al-V austenitic steel

The study introduces the chemical composition,mechanical properties,physical properties and production processes of the Fe-23Mn-2Al-V austenitic steel.Investigations were made into the formation of cracks in the hot-rolled Fe-23Mn-2Al-V steel plates,with optical microscopy(OM),scanning electron microscopy(SEM)and energy dispersive spectrum(EDS).The results have shown that intergranular oxidation in the reheating fumace is the main cause of the cracks on the surface of the hot-rolled steel plates.The surface cracking can be largely avoided by controlling the remaining oxygen content in the reheating furnace and improving continuous casting(CC)processes to increase the thickness of fine equiaxed grain layer of the steel slabs.