Research on the SUS304 hot-rolled austenitic stainless steel strip by TMCP

摘要

To avoid intergranular corrosion and obtain microstructural homogenization,the conventional SUS304 austenitic stainless steel needs to be solution annealed after hot rolling.This study investigates the thermal-mechanical controlled process (TMCP) of SUS304 steel,especially the controlled rolling and online accelerated cooling procedures.The objective of this research is to reduce or even prevent carbide precipitation based on the description of the time-temperature-precipitation (TTP) curve.The dynamic and post-dynamic recrystallization behaviors of this steel ensured the homogenization of grains in this process due to,which was studied by the hot compression tests.The microstructure and the properties of the TMCP-produced SUS304 steel strip were compared with the conventional method of solution annealing.Based on the above results,the newly developed TMCP-produced SUS304 hot-rolled austenitic stainless steel strip has been successfully produced and it can be directly utilized in the cold rolling process without solution annealing.