| 低碳中锰热轧TRIP钢退火工艺及组织演变 |
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| 作者姓名： | 李振 赵爱民 唐荻 米振莉 焦殿辉 |
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| 作者单位： | 1. 北京科技大学冶金工程研究院, 北京 100083; |
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| 基金项目： | 教育部博士点基金(博导类)资助项目(20110006110007)国家高技术研究发展计划资助项目(2008AA03Z502) |
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| 摘 要： | 研究了第三代高强度高塑性TRIP钢的退火工艺对性能的影响和组织演变规律.热轧后形成的原始马氏体与临界退火时形成的残余奥氏体使TRIP钢具有良好的强度和塑性.结果表明:实验用钢可获得1000MPa以上的抗拉强度和30%以上的断后延伸率,且强塑积>30 Gpa·%;退火温度和保温时间对钢的力学性能具有显著影响,热轧TRIP钢临界退火温度为630℃,保温时间18 h时,实验用钢能获得最佳的综合力学性能.
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| 关 键 词： | TRIP钢 残余奥氏体 锰 退火 微观组织 |
| 收稿时间： | 2011-01-05 |
Annealing processing parameters and microstructure evolution of hot-rolled low-carbon medium-manganese TRIP steels |
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| Affiliation: | 1. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China;2. Nuclear and Radiation Safety Center, Ministry of Environmental Protection of China, Beijing 100082, China |
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| Abstract: | The effects of annealing processing on the mechanical properties and microstructure evolution of high strength and high ductility TRIP steels were investigated.The hot-rolled-and-annealed TRIP steel has remarkable strength and ductility due to the prior martensitic microstructure obtained in the as-hot-rolled condition and the retained austenite formed during intercritical annealing.The results show that the test steels have a tensile strength of over 1 000 MPa and an elongation of over 30%,and the product of ultimate tensile strength and total elongation exceeds 30 GPa·%.The mechanical properties are significantly influenced by intercritical annealing temperature and soaking time.When the TRIP steel is treated at an intercritical annealing temperature of 630℃ for 18h,the best mechanical properties are obtained. |
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