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首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Thermomechanically Hot Rolled High and Ultra High Strength Steel Grades - Processing, Properties and Application
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Thermomechanically Hot Rolled High and Ultra High Strength Steel Grades - Processing, Properties and Application

机译：热机械热轧高强度和超高强度钢等级-加工，性能和应用

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摘要

In all application fields for hot rolled strip products for direct processing, e.g. construction and engineering but also crane and truck industry, there is a strong customers demand for grades with increased strength levels and well balanced formability. At voestalpine Stahl GmbH these requirements were met with the development of the high strength microalloyed steel grade ALFORM700M~® and the ultra high strength steel grade ALFORM900M~® with a minimum yield strength (YS) of 700 MPa and 900 MPa, respectively. In the present paper investigations on the steel grades ALFORM700M~® and ALFORM900M~® are introduced. To explain the evolution of the obtained complex microstructures consisting of bainitic ferrite, bainite and martensite alloy design and industrial production process is discussed on the base of dilatometric experiments and TEM investigations. The formation of precipitates is studied by using a numerical model, chemical methods and mechanical testing after heat treatment. Mechanical and mechanic-technological properties of the two steel grades are compared. Furthermore, some processing aspects as weldability and bending behaviour are highlighted. Finally, some typical applications for this high and ultra high strength steel grades are presented.
机译：在用于直接加工的热轧带材产品的所有应用领域中，例如建筑，工程以及起重机和卡车行业，客户都对具有增加的强度等级和均衡的可成型性的牌号有强烈的需求。在奥钢联Stahl GmbH公司，开发最低强度屈服强度（YS）分别为700 MPa和900 MPa的高强度微合金钢ALFORM700M〜和超高强度钢ALFORM900M®满足了这些要求。在本文中，介绍了对钢种ALFORM700M〜®和ALFORM900M〜®的研究。在膨胀试验和透射电镜研究的基础上，讨论了所获得的由贝氏体铁素体，贝氏体和马氏体合金组成的复杂微结构的演变以及工业生产过程。使用数值模型，化学方法和热处理后的机械测试研究沉淀物的形成。比较了两种钢种的机械和机械技术性能。此外，突出显示了诸如可焊性和弯曲行为的一些处理方面。最后，介绍了这种高强度和超高强度钢种的一些典型应用。

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