中南大学学报（自然科学版）2016，Vol.47Issue(12)：3988-3993,6.DOI:10.11817/j.issn.1672-7207.2016.12.004
超快冷对含Nb钢相变行为的影响
Effect of ultra fast cooling on phase transformation behavior for Nb bearing steel
摘要
Abstract
In order to reveal the effect mechanism of ultra fast cooling on phase transformation behavior of Nb bearing steel, phase transformation behavior of Nb bearing steel was investigated under ultra fast cooling added laminar cooling conditions by using MMS−300 thermomechanical simulator. The results show that the experimental steel at 680℃is in ferrite phase zone and the experimental steel at 600℃is in acicular ferrite and bainite phase zone when the cooling rate is higher than 20 ℃/s. When the deformed experimental steel is cooled to ferrite phase zone, ferrite fraction increases with the increase of holding time. Ferrite fraction under ultra fast cooling conditions is higher than that under laminar cooling conditions when the holding time is more than 76.5 s. When the forepart cooling rate reaches 30℃/s, the hard phase microstructure is generated. The microstructure keeps unchanged with the further increase of forepart cooling rate.关键词
超快冷/含Nb钢/相变/冷却速度/显微组织Key words
ultra fast cooling/Nb bearing steel/phase transformation/cooling rate/microstructure分类
矿业与冶金引用本文复制引用
周晓光,徐少华,王福祥,杨浩,王斌,刘振宇,吴迪,王国栋..超快冷对含Nb钢相变行为的影响[J].中南大学学报（自然科学版）,2016,47(12):3988-3993,6.基金项目
国家自然科学基金资助项目(51004037)；辽宁省自然科学基金资助项目(2015020180)；中央高校基本科研业务费专项资金资助项目(N140704002， N130307001)(Project(51004037) supported by the National Natural Science Foundation of China （51004037）
Project(2015020180) supported by the Natural Science Foundation of Liaoning Province, China （2015020180）
Projects(N140704002, N130307001) supported by the Fundamental Research Funds for the Central Universities) （N140704002, N130307001）
