Superior Properties of Ultra-fine-grained Steels

Authors

  • J. I. Leinonen

DOI:

https://doi.org/10.14311/572

Keywords:

ultra-fine-grained steel, super-toughness, yield strength, fatigue strength, TNCP

Abstract

A description of the improved mechanical properties obtained in ultra-fine-grained steels up to now will be presented in this paper, and some potential applications of these new generation steels will be described. In addition, the principle and implementation of a novel hot rolling process developed by the author will be introduced. This novel Thermomechanical Nonrecrystallisation Control Process (TNCP) has been shown to give an ultra-fine ferrite (uff) structure with grain sizes of 2 to 3mm in various test steels, thus resulting in super-toughness. Charpy V impact test results suggest that some of these steels could still be tough at temperatures lower than -100 °C. This novel process, TNCP, is one potential candidate for the commercial production of superior ultra-fine-grained steels in the future.

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Author Biography

J. I. Leinonen

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Published

2004-01-03

How to Cite

Leinonen, J. I. (2004). Superior Properties of Ultra-fine-grained Steels. Acta Polytechnica, 44(3). https://doi.org/10.14311/572

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Section

Articles