The effect of niobium on transformations from austenite to ferrite in low carbon steels

摘要：

Niobium has an important effect on the transformation behaviour,grain size refinement and precipitation strengthening during hot rolling and subsequent cooling in low carbon steels,with even a low content of niobium having a strong effect on the transformation rate from austenite to ferrite.However,the effects of niobium on transformation behaviour have not been fully characterised and understood to date.This paper examines in detail austenite grain growth as a function of austenitisation time in high strength low alloy (HSLA) steels with three different niobium contents, together with the effect of niobium on the isothermal transformation kinetics from austenite to ferrite as a function of temperature.It is shown that austenite has the slowest grain growth rate in the steel with the highest niobium content.When austenite grain sizes are consistent, the steel with the highest niobium content was found to have the slowest transformation rate from austenite to ferrite.

关键词： niobium transformation kinetics austenite grain growth low carbon steels

作者: WANG Li PARKER Sally ROSE Andrew WEST Geoff THOMSON Rachel

作者单位: Department of Materials, Loughborough University, Loughborough,LE11 3TU,UK Steel Metallurgy Department,Tata Steel RD&T, Swinden Technology Centre, Rotherham,S60 3AR,UK

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 285-288

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）