MoNb-Based Alloying Concepts for Low-Carbon Bainitic Steels
MoNb-Based Alloying Concepts for Low-Carbon Bainitic Steels
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低碳贝氏体钢的铌基合金化概念
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Han. Dong
中科院分区：
文献类型：
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作者：
H. Mohrbacher;Xinjun Sun;Q. Yong;Han. Dong
低碳贝氏体钢为生产具有独特强度和韧性的带材和板材产品提供了一种解决方案。基于MonB的合金化概念对进一步开发和优化此类钢具有巨大的潜力。钼通过抑制先共析铁素体相变，促进针状铁素体和贝氏体相变，从而提高低合金钢的强韧性。一种可选的合金元素是硼。特别关注了Mo与微合金化元素在淬透性、晶粒度控制和析出强化方面的交叉效应。分析了再结晶、显微组织和析出行为等重要冶金效应与力学性能的关系。在这方面，正在讨论带钢和中板轧机的不同加工选择。最后简要介绍了钼在高等级管线钢、高强度工程机械钢、耐火钢和汽车用热轧带钢中的应用实例。
Low-carbon bainitic steels offer a solution to produce strip and plate products with unique properties in terms of strength and toughness. MoNb-based alloying concepts have a great potential to further develop and optimize such steels. Mo can promote the transformation of acicular ferrite and bainite through its retardation effect on the proeutectoid ferrite transformation, and therefore improve the strength and toughness of low alloy steels. An optional alloying element is boron. Special attention is focused on the cross effects of Mo with the microalloying elements with regard to hardenability, grain size control and precipitation strengthening. Important metallurgical effects like recrystallization, microstructure and precipitation behavior are analyzed and related to mechanical properties. Different processing options for strip and plate mills are being discussed in that respect. Finally, some examples of applications of Mo in high grade pipeline steel, high strength engineering machinery steel, fire-resistant steel and hot-rolled strip for automobile are briefly introduced.