| 不同终轧温度下36Mn2V钢的连续冷却转变规律 |
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| 引用本文： | 卢忠山,王福明,李长荣,程慧静.不同终轧温度下36Mn2V钢的连续冷却转变规律[J].北京科技大学学报,2012(3):283-288. |
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| 作者姓名： | 卢忠山 王福明 李长荣 程慧静 |
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| 作者单位： | 北京科技大学钢铁冶金新技术国家重点实验室;北京科技大学冶金与生态工程学院;北京科技大学材料科学与工程学院 |
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| 摘 要： | 采用Gleeble-1500热模拟机,测定了36Mn2V钢经四种终轧温度变形后的连续冷却膨胀曲线,结合金相-硬度法,获得了该钢种的连续冷却转变曲线.结果表明:随冷却速度的增大,实验钢的γ/α相变开始温度逐渐降低,贝氏体相变开始温度先升高到一个平台,随冷却速度的进一步增加又降低,晶粒细化;随终轧温度的降低,实验钢的动态连续冷却转变曲线整体向左上方移动,网状铁素体和晶内铁素体明显减少,晶粒略有细化;经四种温度终轧后以3℃.s-1的冷速冷却到室温的四个试样中,唯独950℃终轧的试样中未观察到贝氏体.
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| 关 键 词： | 微合金化钢 轧制 冷却 相变 金相 |
Continuous cooling transformation of 36Mn2V steel at different finish rolling temperatures |
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| LU Zhong-shan,WANG Fu-ming,LI Chang-rong,CHENG Hui-jing.Continuous cooling transformation of 36Mn2V steel at different finish rolling temperatures[J].Journal of University of Science and Technology Beijing,2012(3):283-288. |
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| Authors: | LU Zhong-shan WANG Fu-ming LI Chang-rong CHENG Hui-jing |
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| Institution: | 1,2) 1) State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China 2) School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 3) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | The continuous cooling transformation(CCT) curves of 36Mn2V steel were obtained on the basis of the expansion curves of continuous cooling at 4 finish rolling temperatures measured on a Gleeble-1500 thermal simulator in combination with metallographic and hardness methods.The experimental results show that with increasing cooling rate the starting temperature of γ/α transformation gradually lowers,but the starting temperature of bainite transformation increases to a plateau and then decreases,and the grains are refined.With the finishing rolling temperature decreasing,the experimental dynamic CCT curves shift to the left and upper wholly,the ferrite along grain boundaries and intra-granular ferrite decrease,and the grains are slightly refined.No bainite appears in the specimen finally rolled at 950 ℃. |
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| Keywords: | microalloyed steel rolling cooling phase transitions metallography |
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