1results about How to "Shrink freely" patented technology

The application discloses a preparation method of high-mechanical-property medium-manganese steel and application thereof and belongs to the technical field of medium-manganese steel processing. The method is based on conventional hot rolling, cold rolling and annealing treatment, and utilizes secondary circulating quenching heat treatment technology after cold rolling, and the temperature is first increased to 900-910 DEG C and kept for 30-35 min, then the temperature is increased to 900-910 DEG C and kept for 10-12 min after water quenching, and then the temperature is increased to 670-690 DEG C and kept for 1-1.5 h for annealing, and then air cooling is carried out to the ambient temperature, so that the content and stability of residual austenite in the medium-manganese steel are further improved, the mechanical properties of the medium-manganese steel product are remarkably improved, the tensile strength is 838 MPa, the total elongation is 90.8%, and the product of the strength and the elongation is 76.1 GPa%. The method can be widely applied to technical fields requiring the use of high-mechanical-property medium-manganese steel.