Secondary hardened bainite
Journal
Materials Science and Technology (United Kingdom)
Journal Volume
30
Journal Issue
9
Pages
1014-1023
Date Issued
2014
Author(s)
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.
Type
journal article