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首页> 外文会议>New developments on metallurgy and applications of high strength steels >NIOBIUM-BEARING STEEL DEVELOPMENT FOR VALUE-ADDED STRUCTURAL APPLICATIONS
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NIOBIUM-BEARING STEEL DEVELOPMENT FOR VALUE-ADDED STRUCTURAL APPLICATIONS

机译：增值结构应用中的含铌钢开发

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摘要

Value-added applications of niobium (Nb) microalloyed steels continue to be developed to meet the increasing material demands of a variety of structural applications. Niobiumbearing steels provide the end-user with improved toughness, fracture resistance and weldability for beam, bridge, ship, storage tank, container and pressure vessel applications. These applications require steel producers to develop grades that economically meet the end-user demands for better low temperature toughness to resist brittle fracture in building, pressure vessel and ship structures, sustain higher loads per unit area in earthquake and hurricane zone product applications, demonstrate improved fire-resistance in buildings and provide improved weldability. Nb-bearing steel grades are being researched and developed in long products for construction applications requiring improved mechanical properties in reinforcing bars and structural sections for earthquake prone zones. The production of these value-added Nb-bearing steels can be realized through the synergistic development of appropriate steel chemistries along with the proper melting and alloy addition practices, slab and billet reheating furnace practices and specific hot rolling practices to successfully obtain a fine grain, homogeneous microstructure. The economics involved in this integration of steel chemistries and production practices will be discussed.
机译：铌（Nb）微合金钢的增值应用不断得到发展，以满足各种结构应用对材料日益增长的需求。含铌钢为梁，桥梁，船舶，储罐，容器和压力容器应用提供了提高的韧性，抗断裂性和可焊接性的最终用户。这些应用要求钢铁生产商开发出能够满足最终用户需求的钢种，以经济地满足最终用户对更好的低温韧性的要求，以抵抗建筑物，压力容器和船舶结构中的脆性断裂，在地震和飓风带产品应用中承受更高的单位面积载荷，并表现出改进建筑物的耐火性，并提高了可焊性。含Nb的钢种正在研究和开发用于建筑应用的长材，这些产品需要在易震地区的钢筋和结构截面中改善机械性能。这些含铌的高附加值钢的生产可以通过协同开发适当的钢化学方法，适当的熔融和合金添加方法，板坯和方坯再热炉方法以及特定的热轧方法来成功地获得细晶粒，均匀的微观结构。将讨论钢化学与生产实践的整合所涉及的经济学。

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