东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (4): 479-483.DOI: 10.12068/j.issn.1005-3026.2015.04.006

• 材料与冶金 • 上一篇    下一篇

货油舱用耐蚀钢连续冷却的转变规律

于驰1， 高秀华2， 王平1， 牛西茜2   

  1. (1.东北大学 材料电磁过程研究教育部重点实验室， 辽宁 沈阳110819;2.东北大学 轧制技术及连轧自动化国家重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2014-04-23 修回日期:2014-04-23 出版日期:2015-04-15 发布日期:2014-11-07
  • 通讯作者: 于驰
  • 作者简介:于驰(1979－ )，男，辽宁铁岭人，东北大学博士研究生； 高秀华(1966- )，女，河北唐山人，东北大学教授，博士生导师； 王平(1964- )，男，黑龙江哈尔滨人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51174058).

Continuous Cooling Transformation of Corrosion Resistant Steel for Cargo Oil Tank

YU Chi1， GAO Xiu-hua2， WANG Ping1， NIU Xi-xi2   

  1. 1. Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials， Northeastern University， Shenyang 110819， China; 2. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2014-04-23 Revised:2014-04-23 Online:2015-04-15 Published:2014-11-07
  • Contact: YU Chi
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摘要： 在MMS-300热模拟试验机上测得货油舱用耐蚀钢在不同冷速下的连续冷却膨胀曲线，结合金相-硬度法， 研究了该耐蚀钢变形和未变形过冷奥氏体冷却过程中的组织演变，建立了连续冷却转变(CCT)曲线.结果表明，动态CCT曲线较静态CCT曲线明显向左上方移动，提高了奥氏体转变的开始温度；随着冷却速度的增大，显微组织由多边形铁素体、珠光体和少量贝氏体逐渐过渡到针状铁素体、粒状贝氏体，最后为板条贝氏体和马氏体.

关键词: 货油舱用钢, 热模拟, 连续冷却转变曲线, 金相-硬度法, 显微组织

Abstract: The continuous cooling transformation (CCT) curve of cargo oil tank (COT) steel was obtained by using dilatometric method combined with metallographic analysis-hardness measurement， and the austenites before and after the compress deformation were analyzed， which were tested on MMS-300 thermal mechanical simulation under different cooling rates. The results showed that the dynamic CCT curve compared to static CCT curve obviously moves to the left and up direction， and the starting temperature of austenite increases. With increasing the cooling rate， the microstructures gradually change from polygonal ferrite， pearlite and a little bainite to a small amount of acicular ferrite and granular bainite， finally transform into bainite and martensite.

Key words: cargo oil tank (COT) steel, thermal simulation, continuous cooling transformation (CCT) curve, metallographic analysis-hardness measurement, microstructure

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