• Volume 39 Issue 6
    Jun.  2017
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    ZHANG Sheng-hua, SONG Bo, SONG Ming-ming, GAO Qi-rui. Influence of Ti-rare earth addition on microstructure and toughness of coarse grain heat-affected zone in C-Mn steel[J]. Chinese Journal of Engineering, 2017, 39(6): 846-853. doi: 10.13374/j.issn2095-9389.2017.06.005
    Citation: ZHANG Sheng-hua, SONG Bo, SONG Ming-ming, GAO Qi-rui. Influence of Ti-rare earth addition on microstructure and toughness of coarse grain heat-affected zone in C-Mn steel[J]. Chinese Journal of Engineering, 2017, 39(6): 846-853. doi: 10.13374/j.issn2095-9389.2017.06.005

    Influence of Ti-rare earth addition on microstructure and toughness of coarse grain heat-affected zone in C-Mn steel

    doi: 10.13374/j.issn2095-9389.2017.06.005
    • Received Date: 2016-10-10
    • The influences of rare earth (RE) and Ti-RE complex treatment on the microstructures and toughness in the coarse grain heat-affected zone (CGHAZ) of C-Mn steel were investigated using a Gleeble-1500D thermal simulator with input heat energy of 65 kJ·cm-1. The inclusions and impact fracture morphology were observed and analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX), and the microstructure was characterized using an optical microscope (OM). The results show that the microstructures in the CGHAZs of RE-and Ti-RE-treated samples are mainly grain boundary ferrite (GBF) + polygonal ferrite (PF) + intragranular acicular ferrite (IAF) and grain boundary ferrite + intragranular acicular ferrite, respectively. Inclusions in the RE-treated specimen are La2O2S + Mn-Al-Si-O + MnS, while those in the Ti-RE-treated specimen are La2O2S + TiOx + Mn-Al-Si-O + MnS. The complex inclusions in Ti-RE-treated steel are smaller than those in RE-treated steel, and the size of IAF in Ti-RE-treated steel is smaller. The impact properties of the CGHAZ in Ti-RE-treated C-Mn steel is improved significantly, and the material is tougher than RE-treated steel.

       

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    • [1]
      Capdevila C, García-Mateo C, Chao J, et al. Advanced vanadium alloyed steel for heavy product applications. Mater Sci Technol, 2009, 25(11):1383
      [6]
      Farrar R A, Harrison P L. Acicular ferrite in carbon-manganese weld metals:an overview. J Mater Sci, 1987, 22(11):3812
      [7]
      Mills A R, Thewlis G, Whiteman J A. Nature of inclusions in steel weld metals and their influence on formation of acicular ferrite. Mater Sci Technol, 1987, 3(12):1051
      [8]
      Lee J L, Pan Y T. Effect of sulfur content on the microstructure and toughness of simulated Heat-Affected zone in Ti-Killed steels. Metall Trans A, 1993, 24(6):1399
      [9]
      Suzuki S, Ichimiya K, Akita T. High tensile strength steel plates with excellent HAZ toughness for shipbuilding:JFE EWEL technology for excellent quality in HAZ of high heat input welded joints. JFE Tech Rep, 2005, 5:24
      [10]
      Hu J, Du L X, Wang J J, et al. Effect of welding heat input on microstructures and toughness in simulated CGHAZ of V-N high strength steel. Mater Sci Eng A, 2013, 577:161
      [11]
      Shi M H, Zhang P Y, Wang C, et al. Effect of high heat input on toughness and microstructure of coarse grain heat affected zone in Zr bearing low carbon steel. ISIJ Int, 2014, 54(4):932
      [12]
      Shim J H, Cho Y W, Chung S H, et al. Nucleation of intragranular ferrite at Ti2O3 particle in low carbon steel. Acta Mater, 1999, 47(9):2751
      [13]
      Byun J S, Shim J H, Cho Y W, et al. Non-metallic inclusion and intragranular nucleation of ferrite in Ti-killed C-Mn steel. Acta Mater, 2003, 51(6):1593
      [14]
      Chai F, Su H, Yang C F, et al. Nucleation behavior analysis of intragranular acicular ferrite in a Ti-killed C-Mn steel. J Iron Steel Res Int, 2014, 21(3):369
      [15]
      Song M M, Song B, Hu C L, et al. Formation of acicular ferrite in Mg treated Ti-bearing C-Mn steel. ISIJ Int, 2015, 55(7):1468
      [16]
      Song M M, Song B, Xin W B, et al. Effects of rare earth addition on microstructure of C-Mn steel. Ironmaking Steelmaking, 2015, 42(8):594
      [17]
      Nako H, Okazaki Y, Speer J G. Acicular ferrite formation on Tirare earth metal-Zr complex oxides. ISIJ Int, 2015, 55(1):250
      [18]
      Byun J S, Shim J H, Cho Y W. Influence of Mn on microstructural evolution in Ti-killed C-Mn steel. Scripta Mater, 2003, 48(4):449
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