| Austempering of Hot Rolled SiMn TRIP Steels |
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| 引用本文： | LI Zhuang,WU Di,HU Rong. Austempering of Hot Rolled SiMn TRIP Steels[J]. 钢铁研究学报(英文版), 2006, 13(5): 0-41. DOI: 10.1016/S1006-706X(06)60093-9 |
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| 作者姓名： | LI Zhuang WU Di HU Rong |
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| 作者单位： | [1]State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China [2]Department of Material Engineering, Institute of Aeronautical Engineering, Shenyang 110034, Liaoning, China [3]College of Foreign Languages, Jiangxi Normal University, Nanchang 330027, Jiangxi, China |
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| 摘 要： | The austempering after hot rolling in hot rolled Si Mn TRIP (transformation induced plasticity) steels was investigated. The mechanism of TRIP was discussed through examination of the microstructure and the mechanical properties of this kind of steel. The results showed that the strain induced transformation to martensite of retained austenite occurs in hot rolled Si Mn TRIP steels. The sample exhibited a good combination of ultimate tensile strength and total elongation when it was held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase in isothermal holding time, and a further increase in the holding duration resulted in the decrease of stability. The mechanical properties were optimal when holding for 25 min, and tensile strength and total elongation reached the maximum values (774 MPa and 33%, respectively).
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| 关 键 词： | 等温淬火 热轧 TRIP 机械性能 |
| 收稿时间： | 2006-04-11 |
Austempering of Hot Rolled Si-Mn TRIP Steels |
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| LI Zhuang,WU Di,HU Rong. Austempering of Hot Rolled Si-Mn TRIP Steels[J]. Journal of Iron and Steel Research, 2006, 13(5): 0-41. DOI: 10.1016/S1006-706X(06)60093-9 |
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| Authors: | LI Zhuang WU Di HU Rong |
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| Affiliation: | State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China |
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| Abstract: | The austempering after hot rolling in hot rolled Si-Mn TRIP (transformation-induced plasticity) steels was investigated. The mechanism of TRIP was discussed through examination of the microstructure and the mechanical properties of this kind of steel. The results showed that the strain-induced transformation to martensite of retained austenite occurs in hot rolled Si-Mn TRIP steels. The sample exhibited a good combination of ultimate tensile strength and total elongation when it was held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase in isothermal holding time, and a further increase in the holding duration resulted in the decrease of stability. The mechanical properties were optimal when holding for 25 min, and tensile strength and total elongation reached the maximum values (774 MPa and 33%,respectively). |
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| Keywords: | austempering hot rolling TRIP mechanical property |
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