Influence of Cooling Rate on the Microstructures and Properties of a Nb-Ti-Mo Steel

Abstract:

A Nb-Ti-Mo high strength steel was selected at two different cooling rates through ultra-fast cooling process, and its microstructures and strengthening mechanisms were analyzed. The results show the size of ferrite was decreased and the amount of bainite and micro-hardness were increased with increasing of cooling rate through thermal simulation. The UFC technology can improve the yield and tensile strength 25MPa and 35MPa, respectively, compared with conventional TMCP. The microstructure of this steel is mainly ferrite and good strength and toughness are caused by the refinement of ferrite and fine precipitates. Ultra-fast cooling technology improves the strength and toughness of this steel effectively.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 14-17
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.14
• Online since: January 2012
• Authors: Hai Long Yi, Yang Xu, Zhen Yu Liu, Guo Dong Wang
• Keywords: Nb-Ti-Mo Steel, Pecipitate, Strengthening, Ultra-Fast Cooling Process

References

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