| 590MPa级大梁钢的奥氏体连续冷却转变动力学研究 |
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| 引用本文： | 赵江涛,;刘永前,;刘斌,;周祖安,;刘文艳,;杨海林.590MPa级大梁钢的奥氏体连续冷却转变动力学研究[J].武汉工程职业技术学院学报,2014(3):23-26. |
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| 作者姓名： | 赵江涛 ;刘永前 ;刘斌 ;周祖安 ;刘文艳 ;杨海林 |
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| 作者单位： | [1]武汉钢铁集团公司研究院,湖北武汉430080; [2]武钢热轧总厂,湖北武汉430080 |
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| 摘 要： | 通过Formastor-F全自动相变记录仪上测定了铌钛复合强化型590MPa级大梁钢在不同冷速下的奥氏体转变动力学曲线,并结合金相组织和硬度测试,分析了不同冷却速度对组织转变、晶粒尺寸和硬度的影响规律。在不同的冷却范围内,试验钢分别获得铁素体、珠光体、贝氏体和马氏体。当冷速在0.5℃/s以下时,获得F+P,在1℃/s~10℃/s之间时,获得F+P+B,在15℃/s~50℃/s之间时,获得F+B,在100℃/s时,获得B+M。试验结果为轧钢生产提供了工艺指导依据。
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| 关 键 词： | 奥氏体 CCT 组织转变 大梁钢 |
A Dynamics Analysis of Austenite CCT of 590MPa Beam Steel |
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| Institution: | ZHAO Jiangtao, LIU Yongqian, LIU Bin, ZHOU Zuan, LIU Wenyan, YANG Hailin (1. Research and Development Center of WISCO, Wuhan 430080, Hubei 2. Hot Rolling Mill of General Plant of WISCO, Wuhan 430080, Hubei) |
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| Abstract: | The affecting laws of microstructure transformation ,grain size and hardness at various cool-ing rates were analyzed ,based on Austenite CCT curves of 590MPa beam steel strengthened by micro -al-loy Nb and Ti at different cooling rates determined by the Formastor-F automatic phase transition recorder and metallographic analysis and hardness test .Ferrite ,pearlite ,bainite and martensite appeared on the test steel at different range of cooling rates .F＋ P was obtained when the cooling rate was lower than 0 . 5℃ /s ,F＋P＋B was obtained between 1℃ /s and 10℃/s ,F＋B was obtained between 15℃/s and 50℃/s , B＋M was obtained at 100℃ /s .The results offered technological process reference to rolling production . |
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| Keywords: | austenite CCT microstructure transformation beam steel |
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