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Effect of Austenitizing Temperature on Pearlite Transformation of a Medium-Carbon Steel

  • G. H. WuEmail author
  • K. M. Wu
  • O. Isayev
  • O. Hress
  • S. Yershov
  • V. Tsepelev
Article
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Pearlite transformation is a necessary step in the production of ultra-high strength wires and nanostructured bainitic steels. The initial austenite grain size has an important influence on the bainite and pearlite transformation. The effect of austenitizing temperature on the austenite-to-pearlite transformation in a medium-carbon steel was investigated by using a Gleeble 1500 simulator. The initial austenite grains coarsened from 33.7 to 68.5 μm when the austenitizing temperature increased from 850°C to 1100°C. The phase-volume percentage and interlamellar spacing of the pearlitic microstructure decreased from 86.6% to 5.2%, and from 114 nm to 110 nm, respectively, in the same austenitizing temperature range. The starting temperature of the pearlite transformation was inversely proportional to the austenitizing temperature. The pearlite-transformation temperature range (43–48°C) did not change visibly with austenitizing temperature. The Vickers hardness of the transformed microstructure (pearlite + martensite) was proportional to the austenitizing temperature.

Keywords

steel phase transformation pearlite bainite microstructure 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • G. H. Wu
    • 1
    Email author
  • K. M. Wu
    • 1
  • O. Isayev
    • 1
  • O. Hress
    • 1
  • S. Yershov
    • 1
  • V. Tsepelev
    • 2
  1. 1.The State Key Laboratory of Refractories and Metallurgy, International Research Institute for Steel TechnologyWuhan University of Science and TechnologyWuhanChina
  2. 2.Center for Liquid Metal PhysicsUral Federal UniversityYekaterinburgRussia

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