Effect of cooling rate on oxidation behaviour of microalloyed steel

Authors

Xianglong Yu, University of WollongongFollow
Zhengyi Jiang, University of WollongongFollow
Jingwei Zhao, University of WollongongFollow
Dongbin Wei, University of WollongongFollow
Cunlong Zhou, University of Science and TechnologyFollow

RIS ID

84444

Publication Details

Yu, X., Jiang, Z., Zhao, J., Wei, D. & Zhou, C. (2013). Effect of cooling rate on oxidation behaviour of microalloyed steel. Applied Mechanics and Materials, 395-396 273-278.

Abstract

Oxidation characteristics of a microalloyed low carbon steel were investigated by a hot rolling mill combined with acceleration cooling system over the cooling rate range from 20 to 70°C/s. The effects of cooling rate after hot rolling on microstructure and phase composition of oxide scale were examined. The results showed that the increase of the cooling rate has a significant influence on the decrease of the grain size and surface roughness of oxide scale. A higher cooling rate promotes the formation of retain wustite and primary magnetite precipitation while suppression of eutectoid α-iron precipitates. This provides the possibility to enhance potential contribution of magnetite precipitates with preferable ductility, and hence fabricates a desired oxide-scale structure under continuous post cooling conditions considering a suitable cooling rate.