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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:659

Article

Li, Y.¹  Wan, X. L.¹  Lu, W. Y.¹  Shirzadi, A. A.^1,2,3  Isayev, O.¹  Hress, O.¹  Wu, K. M.¹ 

[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Hubei Prov Key Lab Syst Sci Met Proc, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Open Univ, Dept Engn & Innovat, Walton Hall, Milton Keynes MK7 6AA, Bucks, England

[3] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

关键词: Steel;    Deoxidation;    Microstructure;    Mechanical property;    First-principles calculation;   

DOI  :  10.1016/j.msea.2016.02.035

来源: Elsevier

【 摘 要 】

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. (C) 2016 Elsevier B.V. All rights reserved.

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