| 热变形后冷却速度对铁素体-贝氏体微合金钢组织演变的影响 |
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| 引用本文： | 管丽 刘雅政 周乐育 宋仁伯. 热变形后冷却速度对铁素体-贝氏体微合金钢组织演变的影响[J]. 特殊钢, 2007, 28(3): 35-37 |
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| 作者姓名： | 管丽 刘雅政 周乐育 宋仁伯 |
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| 作者单位： | 北京科技大学材料科学与工程学院 ，北京 100083 |
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| 基金项目： | 中信-CBMM铌钢研究与开发基金资助项目（编号：2006RMJS-D017） |
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| 摘 要： | 开发了0.06C-1.08Si-1.64Mn-0.30Mo-0.039Nb-0.01Ti铁素体-贝氏体微合金化(F+B)钢;用Gleeble.1500热模拟机测定了该实验钢在900℃变形50％后0.5～40℃／s冷却速度下的连续冷却转变曲线(CCT),并分析了形变奥氏体的相变组织。结果表明,该钢的CCT曲线分为多边形铁素体转变区和贝氏体转变区两大部分,中间被奥氏体亚稳区隔开;当冷速≤2℃／s时,钢中出现多边形铁索体,当冷速≥5℃／s时,组织主要为粒状贝氏体和板条贝氏体。
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| 关 键 词： | 铁素体-贝氏体钢 热变形 冷却速度 组织演变 CCT曲线 |
| 收稿时间： | 2006-12-22 |
| 修稿时间： | 2006-12-22 |
Effect of Cooling Rate on Structure Evolution of Hot Deformed Ferrite-Bainite Micro Alloying Steel |
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| Guan Li, Liu Yazheng, Zhou Leyu , Song Renbo. Effect of Cooling Rate on Structure Evolution of Hot Deformed Ferrite-Bainite Micro Alloying Steel[J]. Special Steel, 2007, 28(3): 35-37 |
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| Authors: | Guan Li Liu Yazheng Zhou Leyu Song Renbo |
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| Affiliation: | School of Materials Science and Engineering, University of Science and Technology, Beijing 100083 |
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| Abstract: | Ferrite-bainite(F+B)microalloying steel0.06C-1.08Si- 1.64Mn-0.30Mo-0.039Nb-0.01Ti has been developed; continuous cooling transformation(CCT)diagram of 50% deformed test steel at 900 ℃ and with cooling rate 0.5～40 ℃/s was obtained by Cleeble-1500 thermal simulator,and phase transformation structure of deformed austenite was analyzed. Results showed that the CCT diagram was composed of polygonal ferrite transformation region and bainite transformation region which were divided by metastable austenite region; as cooling rate was≤2 ℃/s,polygonal ferrite occurred in steel and as the cooling rate was ≥5 ℃/s,main structure in steel consisted of granular bainite and lath bainite. |
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| Keywords: | Ferrite-Bainite Steel Hot Deformation Cooling Rate Structure Evolution CCT Diagram |
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