| 循环加热.淬火工艺下超细晶奥氏体的晶粒演变特征 |
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| 引用本文： | 姚圣杰,杜林秀,刘相华,王国栋.循环加热.淬火工艺下超细晶奥氏体的晶粒演变特征[J].材料热处理学报,2009,30(5). |
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| 作者姓名： | 姚圣杰 杜林秀 刘相华 王国栋 |
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| 作者单位： | 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 基金项目： | 国家自然科学基金(50527402) |
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| 摘 要： | 分别利用含Nb钢和Nb-V-Ti钢研究了循环加热-淬火工艺下原始组织分别为温轧铁素体/珠光体、温轧回火马氏体以及常规铁素体/贝氏体的热模拟试样在不同循环次数条件下所获得的超细晶奥氏体晶粒的演变特征。研究表明:复合微合金化更有利于该工艺下奥氏体晶粒的超细化,且相比之下以温轧铁素体/珠光体为原始组织更有利于获得超细晶奥氏体,利用这一原始组织在3~4次循环加热-淬火处理后得到奥氏体晶粒尺寸在1~2μm;同样原始组织条件下,单纯添加Nb使得实现最大程度奥氏体晶粒超细化效果所需要的循环加热-淬火次数减少;根据Nb-V-Ti复合微合金钢中析出相粒子的透射及能谱分析发现,V的大量固溶以及Nb的部分溶解很大程度上决定着微合金元素添加对奥氏体晶粒超细化的影响程度。
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| 关 键 词： | 超细晶奥氏体 低碳微合金钢 循环加热-淬火 原始组织 |
Evolution of ultra-fine austenite grains in Nb and Nb-V-Ti microalloyed low carbon steel under cyclic heating-quenching treatment |
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| YAO Sheng-jie,DU Lin-xiu,LIU Xiang-hua,WANG Guo-dong.Evolution of ultra-fine austenite grains in Nb and Nb-V-Ti microalloyed low carbon steel under cyclic heating-quenching treatment[J].Transactions of Materials and Heat Treatment,2009,30(5). |
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| Authors: | YAO Sheng-jie DU Lin-xiu LIU Xiang-hua WANG Guo-dong |
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| Affiliation: | State Key Laboratory of Rolling and Automation;Northeastern University;Shenyang 110004;China |
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| Abstract: | Effects of initial microstructure(warm-rolled ferrite/pearlite,warm-rolled tempered martensite and ferrite/bainite) and cycle times of repetitive heating-quenching treatment on the evolution of ultra-fine austenite grains in Nb and Nb-V-Ti microalloyed steel were investigated.The results indicate that much more significant refinement of austenite grains can be expected in Nb-V-Ti microalloyed steel by cyclic heating-quenching treatment,and the initial microstructure of warmrolled ferrite/pearlite is favoura... |
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| Keywords: | ultra-fine austenite grain low-carbon microalloyed steel repetitive reheating-quenching initial microstructure |
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