| 轧制工艺对微合金管线钢组织及M/A岛的影响 |
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| 引用本文： | 杨景红,刘清友,孙冬柏,李向阳.轧制工艺对微合金管线钢组织及M/A岛的影响[J].北京科技大学学报,2009,31(2). |
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| 作者姓名： | 杨景红 刘清友 孙冬柏 李向阳 |
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| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083
2. 钢铁研究总院结构材料研究所,北京,100081 |
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| 基金项目： | 国家科技支撑计划资助项目(No.2006BAE03A15) |
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| 摘 要： | 采用热模拟和显微组织分析方法,研究了冷却速率、变形温度、变形量等轧制工艺参数对一种X70级微合金管线钢组织及马氏体/奥氏体(M/A)小岛的影响.结果表明:增大冷速、降低变形温度均可使组织细化,组织中多边形铁素体减少,针状铁素体增多;同时,在不同的控轧条件下,会形成一定的M/A小岛,变形温度对M/A小岛影响不大,而适当提高冷速和增大变形量将减少小岛相对量,并使其细小而弥散分布于基体;合理控制形变参数及冷速可获得较理想的显微组织与M/A小岛的配合,提高材料性能.
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| 关 键 词： | 管线钢 M/A岛 针状铁素体 热模拟 |
Effect of rolling processing on the microstructure and M/A islands in a X70 grade pipeline steel |
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| YANG Jing-hong,LIU Qing-you,SUN Dong-bai,LI Xiang-yang.Effect of rolling processing on the microstructure and M/A islands in a X70 grade pipeline steel[J].Journal of University of Science and Technology Beijing,2009,31(2). |
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| Authors: | YANG Jing-hong LIU Qing-you SUN Dong-bai LI Xiang-yang |
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| Abstract: | The effects of cooling rate,deformation temperature and reduction on the microstructure and martensite/austenite(M/A)islands in a Nb-V-Ti micro-alloyed steel were studied by Gleeble thermal-mechanical simulation tests and microstructural observations.The results show that an increase in cooling rate and a decrease in deformation temperature can refine the microstructure,reduce polygonal ferrite and enhance acicular ferrite(AF)in the steel.Under different controlled rolling processes,there is a certain amoun... |
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| Keywords: | pipeline steel M/A island acicular ferrite thermal-mechanical simulation test |
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