Effect of Coiling Procedure on Microstructure and Mechanical Properties of C-Si-Mn Hot-rolled TRIP steel

Abstract

Abstract The effect of coiling procedure on microstructure evolution and mechanical properties were experimentally investigated. The results showed that the strength of experimental steels was increased and the elongation was decreased with temperature below Ms point. Among all the experimental steels, the mechanical properties of steel A and steel C were imperfect. It can be attributed to the high coiling temperature (500 °C) and low coiling temperature (285 °C). The mechanical properties of the experimental steel B were the most balanced and excellent. The yield strength, tensile strength and impact energy of the 1/4-Charpy size specimen were 685 MPa, 1010 MPa and, 16.3 J respectively, which could meet the demand of high strength structural steel in civilian applications the total elongation at -20 °C was 15.3% and TRIP effect caused by RA was obvious.