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| 弹簧钢55SiCrA过冷奥氏体动态连续冷却转变 | |
| 引用本文： | 刘虎,孔祥华,孙彦辉,沈朴恒,王德炯,孙华,李翔. 弹簧钢55SiCrA过冷奥氏体动态连续冷却转变[J]. 材料热处理学报, 2011, 32(7) |
| 作者姓名： | 刘虎 孔祥华 孙彦辉 沈朴恒 王德炯 孙华 李翔 |
| 作者单位： | 1. 北京科技大学新材料技术研究院,北京,100083 2. 北京科技大学冶金与生态工程学院,北京,100083 3. 南京联合钢铁有限公司,江苏南京,210035 |
| 摘 要： | 采用热膨胀法结合金相-显微硬度法,在Gleeble-1500热模拟试验机上测定了弹簧钢55SiCrA的相变临界点Ac1、Ac3、Ar1、Ar3和Ms;同时测定了奥氏体在不同冷却速度下连续转变时的膨胀曲线,并绘制了动态连续冷却转变曲线（CCT图）;通过FE-SEM研究了不同的冷却速度对显微组织形貌和珠光体片层间距的影响。结果表明：随着冷速的增加,珠光体片层间距减小,显微硬度值增大;弹簧钢55SiCrA线材控制冷却理想的冷速范围为0.5～1℃/s。 |
| 关 键 词： | 弹簧钢55SiCrA 连续冷却转变 CCT曲线 片层间距 热模拟 |
Dynamic continuous cooling transformation of supercooled austenite in spring steel 55SiCrA |
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| LIU Hu,KONG Xiang-hua,SUN Yan-hui,SHEN Pu-heng,WANG De-jiong,SUN Hua,LI Xiang. Dynamic continuous cooling transformation of supercooled austenite in spring steel 55SiCrA[J]. Transactions of Materials and Heat Treatment, 2011, 32(7) | |
| Authors: | LIU Hu KONG Xiang-hua SUN Yan-hui SHEN Pu-heng WANG De-jiong SUN Hua LI Xiang |
| Affiliation: | LIU Hu1,KONG Xiang-hua1,SUN Yan-hui2,SHEN Pu-heng3,WANG De-jiong3,SUN Hua3,LI Xiang3(1.Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China,2.School of Metallurgical and Ecological Engineering,3.Nanjing Iron and Steel Corporation,Nanjing 210035,China) |
| Abstract: | The critical temperatures,such as Ac1,Ac3,Ar1,Ar3 and Ms of spring steel 55SiCrA were determined by dilatometric change combined with metallographic test and microhardness measurement on a Gleeble-1500 thermal mechanical simulator.By measuring the dilatometric curves of supercooled austenite continuous cooling transformation at different cooling rates,dynamic CCT diagram was obtained.The effects of different cooling rates on microstructure and pearlite lamellar specing were studied by FE-SEM.The results sho... |
| Keywords: | spring steel 55SiCrA continuous cooling transformation CCT curves lamellar spacing thermal mechanical simulation |
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