| INTRAGRANULAR FERRITE FORMED IN ASSOCIATION WITH INCLUSIONS IN A VANADIUM MICROALLOYED STEEL |
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| 作者姓名： | K.M.Wu M.Enomoto |
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| 作者单位： | [1]DepartmentofAppliedPhysics,TheHubeiProvinceKeyLaboratoryofRefractionsandCeramies-Ministry-ProvinceJointly-ConstructedCultivationBaseforStateKeyLaboratory,WuhanUniversityofScienceandTechnology,Wuhan430081,China [2]DepartmentofMaterialsScienceandEngineering,IbarakiUniversity,Nakananusawa,Hitachi316-8511,Japan |
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| 摘 要： | lntragranular ferrite was formed at inclusions in a vanadium microalloyed steel with excess amount of sulfur. The chemical composition of inclusions in the steel was analyzed by SEM-EDS. The inclusions were mainly composed of MnS and aluminum oxides. The precipitation of MnS at aluminum oxides might result in Mn depletion, which, in turn, promotes the formation of intragranular ferrite. Optical and SEM observations and threedimensional (3D) reconstruction demonstrated that intragranular ferrite was formed at inclusions. The morphology of intragranular ferrite changed with undercooling. At higher temperatures intragranular ferrite was nearly equiaxed whereas it was plate-like or lath-like at lower temperatures.
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| 关 键 词： | 微合金钢材 非三角铁素体 晶核形成 三维重构 微观结构 |
INTRAGRANULAR FERRITE FORMED IN ASSOCIATION WITH INCLUSIONS IN A VANADIUM MICROALLOYED STEEL |
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| K.M.Wu M.Enomoto.INTRAGRANULAR FERRITE FORMED IN ASSOCIATION WITH INCLUSIONS IN A VANADIUM MICROALLOYED STEEL[J].Acta Metallurgica Sinica(English Letters),2004,17(6):785-789. |
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| Authors: | KMWu MEnomoto |
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| Affiliation: | 1. Department of Applied Physics, The Hubei Province Key Laboratory of Refractions and Ceramies--Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China
2. Department of Materials Science and Engineering, Ibaraki University, Nakananusawa, Hitachi 316-8511, Japan |
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| Abstract: | Intragranular ferrite was formed at inclusions in a vanadium microalloyed steel with excess amount of sulfur. The chemical composition of inclusions in the steel was analyzed by SEM-EDS. The inclusions were mainly composed of MnS and aluminum oxides. The precipitation of MnS at aluminum oxides might result in Mn depletion, which, in turn, pro- motes the formation of intragranular ferrite. Optical and SEM observations and three- dimensional (3D) reconstruction demonstrated that intragranular ferrite was formed at inclusions. The morphology of intragranular ferrite changed with undercooling. At higher temperatures intragranular ferrite was nearly equiaxed whereas it was plate-like or lath-like at lower temperatures. |
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| Keywords: | steels intragranular ferrite nucleation three-dimensional reconstruction |
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