| 热变形条件下X80管线钢连续冷却相变 |
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| 引用本文： | 刘云飞,彭艳,刘宏民,章健. 热变形条件下X80管线钢连续冷却相变[J]. 材料热处理学报, 2011, 32(5) |
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| 作者姓名： | 刘云飞 彭艳 刘宏民 章健 |
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| 作者单位： | 燕山大学国家冷轧板带装备及工艺工程技术研究中心,亚稳材料制备技术与科学国家重点实验室,河北,秦皇岛,066004 |
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| 基金项目： | 教育部“新世纪优秀人才支持计划”(NCET-09-0117); 国家高技术研究发展(863)计划(2009AA04Z143) |
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| 摘 要： | 利用Gleeble-3500热模拟试验机研究了两种不同Nb含量的X80管线钢变形后连续冷却过程中相变行为,绘制了连续冷却转变曲线(CCT曲线);分析了控轧控冷工艺以及Nb含量对X80管线钢连续冷却相变的影响。结果表明,随着冷却速度的增加,降低了铁素体转变开始温度,组织得到细化,铁素体形貌从多边形逐渐向针状转变;变形量的增加和变形温度的降低,对铁素体相变也有促进作用,并使铁素体晶粒尺寸进一步细化;Nb可推迟铁素体和珠光体转变,并显著降低铁素体开始转变温度,细化了铁素体晶粒尺寸。
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| 关 键 词： | X80管线钢 相变 Nb 连续冷却 CCT曲线 |
Continuous cooling transformation for X80 pipeline steel under hot deformation |
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| LIU Yun-fei,PENG Yan,LIU Hong-min,ZHANG Jian. Continuous cooling transformation for X80 pipeline steel under hot deformation[J]. Transactions of Materials and Heat Treatment, 2011, 32(5) |
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| Authors: | LIU Yun-fei PENG Yan LIU Hong-min ZHANG Jian |
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| Affiliation: | LIU Yun-fei,PENG Yan,LIU Hong-min,ZHANG Jian(National Engineering Research Center for Equipment and Technology of Cold Rolling Strip,State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China) |
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| Abstract: | Continuous cooling transformation behavior of X80 pipeline steel with different content of Nb were simulated on a Gleeble-3500 thermomechanical simulator,and the continuous cooling transformation(CCT) curves were measured.The influence of cooling rate,deformation process and addition of Nb on transformation of X80 pipeline steel were studied.The results show that the ferrite transformation temperature is decreased,the grain size is refined and the polygonal ferrite changes gradually to needle-like with the ... |
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| Keywords: | X80 pipeline steel phase transformation Nb continuous cooling CCT curve |
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