Journal of Materials Science

, Volume 25, Issue 12, pp 5070–5076 | Cite as

Effect of carbides on the austenite grain growth characteristics in 1Cr-1C and 6Cr-1Mo-1C steels

  • Amitava Ray
  • Santanu Kr. Ray
  • S. R. Mediratta


The nature of carbidesvis-a-vis austenite grain growth characteristics in a ball-bearing steel (1Cr-1C) and in a wear-resistant steel (6Cr-1Mo-1C) is reported. Quantitative EPMA analysis was used to determine the type of carbides andin situ examination of austenite grain growth was carried out in a hot-stage microscope. The grain size against temperature plots indicated an initial stage of slower “normal” grain growth, followed by the “abnormal” growth, or, grain coarsening beyond a critical soaking temperature. The M3C type of carbides containing a small amount of chromium could inhibit grain coarsening up to 1223 K in 1Cr-1C steel, whereas the alloy carbides of the M7C3 type with a substantial amount (about 35 mass%) of chromium were more effective in restricting grain growth even up to 1273 K in the 6Cr-1Mo-1C steel. In addition, the grain sizes obtained in the latter steel were found to be considerably smaller than those of the former variety at all soaking temperatures investigated.


Polymer Grain Size Carbide Chromium Austenite 
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Copyright information

© Chapman and Hall Ltd. 1990

Authors and Affiliations

  • Amitava Ray
    • 1
  • Santanu Kr. Ray
    • 1
  • S. R. Mediratta
    • 1
  1. 1.Research and Development Centre for Iron and SteelSteel Authority of India LimitedRanchiIndia

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