Effect of Intercritical Annealing on Retained Austenite and Mechanical Properties of Cold Rolled TRIP Steel with Different Silicon Content

This paper studies the effects of silicon content and intercritical annealing conditions on retained austenite and mechanical properties of the two low-carbon cold-rolled TRIP steels,which containing silicon content 1.5%wt and 1.0%wt respectively.The results show that the volume fractions and carbon concentration of retained austenite,as well as the yield strength and tensile strength of the two steels,increase as intercritical annealing temperature rising.The decrease of silicon content(1.0%) had no influence on the retained austenite volume fractions,but decreasing the carbon concentration in retained austenite and the tensile strength.Both of the two steels can obtain a maximum strength-ductility.