ISSN：1003-8620

CN：42-1243/TF

主管：中信泰富特钢集团股份有限公司

主办：大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (2): 68-70.

• 组织和性能 • 上一篇    

Nb-V-Ti微合金化高强度钢08MnCr连续冷却转变曲线和组织

陈振业，徐 光   

  1. 武汉科技大学钢铁冶金及资源利用教育部重点实验室，武汉 430081
  • 收稿日期:2008-09-16 出版日期:2009-04-01 发布日期:2022-12-05
  • 作者简介:陈振业(1983-)，男，硕士研究生，金属加工过程组织和性能控制研究。
  • 基金资助:
    武汉科技大学博士科研基金资助(010195)

Continuous Cooling Transformation Curves and Structure of Nb-V-Ti Microalloying 08MnCr High Strength Steel

Chen Zhenye , Xu Guang   

  1. Key Lab for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081
  • Received:2008-09-16 Published:2009-04-01 Online:2022-12-05

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摘要： 利用ThermecMaster-Z热模拟实验机测定了一种Nb-V-Ti微合金化高强度钢08MnCr(S2)在910～1 200℃不变形(静态)和变形(动态)奥氏体0.05～30℃/s冷速下连续冷却转变(CCT)曲线,并分析和观察了对应的相变及组织。实验结果表明,提高轧后的冷却速度使Ar3降低,导致钢的晶粒进一步细化;冷却速度大于10℃/s开始出现贝氏体转变。提高加热温度时相变温度降低,变形奥氏体相变温度较不变形奥氏体相变温度高。冷速较低时,铁素体晶粒呈多边形;冷速高时,铁素体晶粒多呈尖角形。

关键词: 控轧控冷, CCT曲线, 组织, 相变

Abstract: Continuous cooling transformation (CCT) curves of non-deformed (static) and deformed (dynamic) austenite of Nb-V-Ti microalloying 08MnCr high strengh steel (S2) at 910~1200 ℃ with cooling rate0.05～30℃/s were measured by using Thermec Master-Z thermal simulator,and corresponding transformation and  structure were analyzed and observed. Test results showed that with increasing cooling rate after rolling,the Ar3 transformation point decreased led to further fine the grain of steel; with cooling rate more than 10 ℃/s,the bainite transformation occurred. With increasing heating temperature the transformation temperature decreased,and the transformation temperature for deformed austenite was higher than that for non-deformed austenite. With lower cooling rate the ferrite grain was polygon,and with higher cooling rate the ferrite grain presented pointed shape.

Key words: Controlled Rolling and Controlled Cooling, CCT Curve, Structure, Phase Transformation

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