Effect of Zr-Ti combined deoxidation on the microstructure and mechanical properties of high-strength low-alloy steels

Li, Y.; Wan, X. L.; Lu, W. Y.; Shirzadi, A. A.; Isayev, O.; Hress, O. and Wu, K. M. (2016). Effect of Zr-Ti combined deoxidation on the microstructure and mechanical properties of high-strength low-alloy steels. Materials Science and Engineering: A, 659 pp. 179–187.

DOI: https://doi.org/10.1016/j.msea.2016.02.035

Abstract

Effect of Zr-Ti combined deoxidation on the microstructures and mechanical properties of high-strength low-alloy steels were investigated by means of microstructure analysis, tensile- and Charpy impact-tests. Experimental results showed the addition of Zr-Ti based deoxidizing agent resulted in the formation of fine Zr-Ti complex oxides. Owing to abundant finely oxides dispersed in the matrix uniformly, the microstructures deoxidized using Zr-Ti was uniform and the strength was enhanced comparing against the steels deoxidized using Al based deoxidizer. The ductility and toughness of the thick steel plates deoxidized using Zr-Ti were also considerably improved, apparently due to the spheroidization and uniform dispersion of MnS.

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