Microstructure and hardness evolution during simulated coiling of a direct strip cast low carbon low niobium steel

Thomas Dorin, Peter Hodgson, Nicole Stanford

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


This paper examines the impact of coiling temperature and duration on the phase transformation and precipitation behavior of a low carbon and low niobium direct strip cast steel. Coiling was performed at three carefully chosen temperatures: (1) in the ferrite (600°C), (2) during the austenite decomposition (700°C) and (3) in the austenite (850°C). The coiling conditions were found to strongly affect the final microstructure and hardness response, thus highlighting the necessity to judiciously design the coiling treatment. Optical microscopy, and scanning and transmission electron microscopy were used to characterize the microstructural constituents (polygonal ferrite, bainite and pearlite) and the NbC precipitates. Vickers macrohardness measurements are utilized to quantify the mechanical properties. The differences in hardening kinetics for the three different temperatures are shown to come from a complex combination of strengthening contributions.

Original languageEnglish
Title of host publicationPTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Subtitle of host publicationWhistler, Canada; 28 June 2015 through 3 July 2015
EditorsMatthias Militzer, Gianluigi Botton, Lon-Qing Chen, James Howe, Chadwick Sinclair, Hatem Zurob
Place of PublicationWhistler BC Canada
PublisherThe Minerals, Metals & Materials Society
Number of pages8
ISBN (Electronic)9780692437360
Publication statusPublished - 2015
Externally publishedYes
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2015 - Westin Whistler Resort & Spa, Whistler, Canada
Duration: 28 Jun 20153 Jul 2015


ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2015
Abbreviated titlePTM 2015
Internet address


  • Age-hardening
  • Low alloy steel
  • Precipitation
  • Strip casting

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