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| 20MnSi钢奥氏体连续冷却转变曲线 | |
| 引用本文： | 包卫平,潘儒乾,王瑞芳,任学平.20MnSi钢奥氏体连续冷却转变曲线[J].热加工工艺,2009,38(18). |
| 作者姓名： | 包卫平 潘儒乾 王瑞芳 任学平 |
| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083 2. 福建三钢(集团)有限责任公司,福建,三明,36500 3. 先进钢铁材料技术国家工程中心,北京,100081 |
| 摘 要： | 利用膨胀法结合金相-硬度法,在Gleeble-1500热模拟试验机上测定了20MnSi钢的临界点Ar1、Ar3、Ac1、Ac3及Ms;同时测定了该钢在不同冷却速度下过冷奥氏体连续冷却时的膨胀曲线,获得了该钢的连续冷却转变曲线(动态CCT曲线);研究了20MnSi钢连续冷却过程中奥氏体转变过程及转变产物的组织和性能.大致找出了避免贝氏体和马氏体产生的冷却速度,初步确定了生产20MnSi钢的控冷速度范围,为生产实践和新工艺的制定提供了参考依据. |
| 关 键 词： | 热模拟 膨胀法 连续冷却转变曲线 |
Continuous Cooling Transformation Curve of Overcooling Austenite for 20MnSi Steel |
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| BAO Weiping,PAN Ruqian,WANG Ruifang,REN Xueping.Continuous Cooling Transformation Curve of Overcooling Austenite for 20MnSi Steel[J].Hot Working Technology,2009,38(18). | |
| Authors: | BAO Weiping PAN Ruqian WANG Ruifang REN Xueping |
| Abstract: | Gleeble-1500 thermal-mechanical simulator was utilized to determine the critical points at Ar_1,Ar_3,Ac_1,Ac_3 and Ms for 20MnSi by dilatometric change referring microscopic test and hardness measurement.The continuous cooling transformation curve for 20MnSi steel was obtained by measuring different dilatometric curves of overcooling austenite with different cooling rates.Transformation process of austenite,the microstructure of transmutation product and mechanical properties were investigated.The cooling rates which avoid the transformation of bainite and martensite are found.The proper range of controlling cooling rates for 20MnSi is determined.All those provide reference for productive practice and developing new technology. |
| Keywords: | 20MnSi |
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