Superior Properties of Ultra-fine-grained Steels

Acta Polytechnica

J. I. Leinonen¹ 

关键词: ultra-fine-grained steel;    super-toughness;    yield strength;    fatigue strength;    TNCP;   

DOI  :  

来源: Czech Technical University in Prague, Faculty of M

【 摘 要 】

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.

【 授权许可】

Unknown