Effect of annealing temperature on microstructure and properties of medium manganese TRIP steel

doi:10.13251/j.issn.0254-6051.2020.07.005

Abstract

Abstract: Effects of different annealing temperatures on the microstructure and properties of hot rolled medium manganese TRIP steel were investigated by means of optical microscope, scanning electron microscope, electronic universal drawing machine, EBSD and XRD analysis. The results show that the hot rolled microstructure of the steel is δ-ferrite strips, martensite and retained austenite. When the annealing temperature increases from 600 ℃ to 900 ℃, the yield strength decreases from 610.3 MPa to 496.7 MPa, and the tensile strength decreases from 757.3 MPa to 630.4 MPa, while at 700 ℃ the maximum elongation (44.9%) can be obtained. On the whole, when the hot rolled tested steel is annealed at 700 ℃, the comprehensive mechanical properties are the best and the strength-elongation product is the highest, which is 33.8 GPa·%.

Key words: medium manganese TRIP steel, hot rolling, annealing, microstructure, mechanical properties

CLC Number:

TG142.1

Zhang Xinyue, Feng Yunli, Cao Kuo. Effect of annealing temperature on microstructure and properties of medium manganese TRIP steel[J]. Heat Treatment of Metals, 2020, 45(7): 23-27.

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