Secondary hardened bainite. (1st July 2014)

• Record Type: Journal Article
• Authors: Huang, B. M.; Yang, J. R.; Yen, H. W.; Hsu, C. H.; Huang, C. Y.; Mohrbacher, H.
• Is Part Of: Materials science and technology. Volume 30:Number 9(2014:Sep.)
• Page Start: 1014
• Page End: 1023
• Publication Date: 2014-07-01
• Subjects: Low carbon bainitic ferrite -- Nb–Mo microalloying addition -- Transmission electron microscopy -- Nanometre sized carbide -- Dislocation density -- Microhardness -- Tempering treatment; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284714Y.0000000536
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract: The effect of Mo additions on the development of bainitic ferrite in hot rolled low carbon (0·05 wt-%C) Nb containing steel strips has been studied. The steel strips were fabricated by a combined process of controlled rolling and accelerated cooling. Microstructural characterisation and mechanical testing for the corresponding strips were investigated. The results indicated that a small amount of Mo addition (0·1–0·3 wt-%) causes the production of a high volume fraction of bainite, which undergoes significant secondary hardening after tempering treatment at 600°C for 1 h. It is noticeable that the secondary hardening effect provides an additional way to significantly increase the strength of low carbon Nb–Mo containing bainitic steels.