| 600MPa级钛微合金化高强钢的组织与性能研究 |
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| 引用本文： | 王建锋,李光强,温德智,肖爱达,邓深.600MPa级钛微合金化高强钢的组织与性能研究[J].武汉冶金科技大学学报,2010(6):561-565. |
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| 作者姓名： | 王建锋 李光强 温德智 肖爱达 邓深 |
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| 作者单位： | [1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]涟源钢铁集团有限公司技术中心,湖南娄底417009 [3]柳州钢铁集团公司技术中心,广西柳州545002 |
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| 基金项目： | 湖北省自然科学基金创新群体资助项目（2008CDA010） |
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| 摘 要： | 采用光学显微镜、透射电镜以及能谱分析等对转炉CSP流程600 MPa级钛微合金化高强钢的组织及性能进行研究。结果表明,试验钢具有良好的综合力学性能,其典型组织为多边形铁素体加粒状贝氏体;位错和位错胞的强化作用成为钛微合金钢的主要强化机制之一;钢中M/A岛在增加试验钢强度的同时并未明显降低其韧性和塑性;试验钢中存在TiN、TiC和TiS等析出物,为钢的细晶强化和析出强化提供了保证;试验钢中存在大量纳米级铁碳析出物,其沉淀强化作用不容忽视。
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| 关 键 词： | 钛 微合金钢 析出物 组织 性能 |
Microstructure and properties of 600MPa Ti-microalloyed high strength strip |
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| Authors: | Wang Jianfeng Li Guangqiang Wen Dezhi Xiao Aida Deng Shen |
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| Affiliation: | 1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;2.Technological Center,Lianyuan Iron and Steel Co.,Ltd.,Loudi 417009,China;3.Technological Center,Liuzhou Iron and Steel Group Co.,Ltd.,Liuzhou 545002,China) |
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| Abstract: | The mechanical properties and microstructure of Ti-microalloyed high strength steel were investigated by means of optical electron microscope,energy dispersive X ray detector,and transmission electron microscope.It is found that the microstructures of the target steel are fine grains of polygon ferrite and granular bainite with good mechanical properties.Dislocation and dislocation cell strengthening function become one of the main reinforced mechanisms.The existing M/A island in steel increases its strength while not significantly reducing its toughness and plasticity.TiN,TiC and TiS precipitates provide guarantee for fine grain strengthening and precipitation strengthening.In addition,there are a lot of nanoscale Fe3C precipitates in the steel,whose precipitation strengthening should not be ignored. |
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| Keywords: | Ti microalloyed steel precipitate microstructure property |
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