| EA4T车轴钢热处理冷却转变特性的研究 |
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| 引用本文： | 傅成骏,李芷慧,朱瑾陶,周鹏,朱天正,覃作祥.EA4T车轴钢热处理冷却转变特性的研究[J].机车车辆工艺,2009(3):1-3. |
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| 作者姓名： | 傅成骏 李芷慧 朱瑾陶 周鹏 朱天正 覃作祥 |
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| 作者单位： | 1. 南车株洲电力机车有限公司,湖南,株洲,412001
2. 大连交通大学材料科学与工程学院,辽宁,大连,116028 |
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| 摘 要： | 本文采用金相分析方法，系统地研究了EA4T钢在不同介质连续冷却、等温冷却下的组织转变。在860℃～920℃加热淬火时，随着加热温度降低，淬火所得的显微组织细小，这种工艺更有利于获得合格的晶粒度；该钢具有很强的贝氏体形成能力，即使空冷也能得到贝氏体组织；此钢在520℃以下等温，可抑制先共析铁素体的析出，得到粒状贝氏体组织，随着等温温度的降低，转变速度加快，在450℃下等温300s就可得到完全的贝氏体组织。
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| 关 键 词： | EA4T钢 热处理 冷却转变 车轴 |
Research of the Cooling Transformation Characteristics of EA4T Axle Steel during its Heat Treatment |
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| Fu Cheng-jun,Li Zhi-hui,Zhu Jing-tao,Zhou Peng,Zhu Tian-zheng,Tan Zuo-xiang.Research of the Cooling Transformation Characteristics of EA4T Axle Steel during its Heat Treatment[J].Locomotive & Rolling Stock Technology,2009(3):1-3. |
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| Authors: | Fu Cheng-jun Li Zhi-hui Zhu Jing-tao Zhou Peng Zhu Tian-zheng Tan Zuo-xiang |
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| Institution: | Fu Chengjun, Li Zhihui, Zhu Jingtao, zhou Peng, Zhu Tianzheng, Tan Zuoxiang( 1. CSR Zhuzhou Electric Locomotive Co. , Ltd. , Zhuzhou Hunan 412001 ; 2. School of Material Science and Engineering, Dalian Jiaotong University, Dalian Liaoning 116028) |
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| Abstract: | The structure transformation of EA4T steel under continuous cooling and isothermal cooling in different media is systematically studied with metallographic analysis. The fine microstructure up to quali- fied grain size is obtained with the decrease of heating temperature during the heating quenching process at 860℃ - 920℃. This steel is prone to the formation of bainite structure even under air cooling condition. In the isothermal environment of under 520℃ , the precipitation of pro-eutectoid ferrite can be restrained and a granular bainite microstructure is attained, with the decrease of the isothermal temperature, the transformation speed up, and a complete bainite structure is obtained if the steel is kept at 450℃ for 300s. |
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| Keywords: | EA4T steel heat treatment cooling transformation axle |
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