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首页> 外文会议>Pacific Rim International Conference on Advanced Materials and Processing; 20071105-09; Jeju Island(KR) >Microstructural Features of a Ultra Low Carbon High Strength Acicular Ferrite Steel Thick Plate
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Microstructural Features of a Ultra Low Carbon High Strength Acicular Ferrite Steel Thick Plate

机译：超低碳高强度针状铁素体钢厚板的显微组织特征

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摘要

A ultra low carbon high strength steel heavy plate (60～80mm thick) was produced with TMCP at Xiangtan Steel. The steel has a good combination of high strength (σ_b～600MPa) and impact toughness (～300J). The microstructural features were analyzed by optical microscopy and scanning electron microscopy (SEM). Results showed that microstructures consisted of a large amount of acicular ferrite and a small amount of polygonal ferrite. A very few amount of retained austenite was also observed in the microstructures. The formation of fine acicular ferrite resulted in the high strength of the steel plate. The good impact toughness of the steel plate is mainly attributed to the formation of acicular ferrite and a very few amount of retained austenite.
机译：湘潭钢铁公司用TMCP生产了一种超低碳高强度钢板厚板（60〜80mm厚）。该钢具有高强度（σ_b〜600MPa）和冲击韧性（〜300J）的良好组合。通过光学显微镜和扫描电子显微镜（SEM）分析了显微结构。结果表明，显微组织由大量的针状铁素体和少量的多边形铁素体组成。在显微组织中也观察到极少量的残余奥氏体。细小的针状铁素体的形成导致钢板的高强度。钢板的良好冲击韧性主要归因于针状铁素体的形成和极少量的残余奥氏体。

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