2012•Advanced materials researchOpen access

Effects of Continuous Annealing Process on Microstructures and Properties of C-Mn-Si Bearing Cold-Rolled TRIP Steel

Lihui Wang, Tang Di, Haitao Jiang, Ji Bin Liu, Yu Chen

Abstract

Effects of continuous annealing process on microstructure and properties of Si based cold-rolled TRIP Steel were studied. The results show that the TRIP effect is more obvious on the condition of 800°C with 120s annealing process and 400°C with 520s aging treatment than others progress. The yield strength of the tested steel is 405MPa, tensile strength is 670MPa, elongation is 32% and strain hardening exponent is 0.230. The microstructures are ferrite, bainite and retained austenite and the volume fraction of retained austenite for the tested steel is 9.20%.

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Key concepts: Materials science, Microstructure, Bainite, TRIP steel, Metallurgy, Austenite, Elongation, Annealing (glass)