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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >The Effect of Chemical Composition on the Hot-Deformation Resistance during Processing of Microalloyed Steels in Thin Slab Casting/Direct Rolling Process
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The Effect of Chemical Composition on the Hot-Deformation Resistance during Processing of Microalloyed Steels in Thin Slab Casting/Direct Rolling Process

机译：薄板坯连铸/直接轧制过程中化学成分对微合金钢加工过程中抗热变形性的影响

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摘要

Most of the high-end steel grades use the benefits of grain refinement in order to raise both strength and toughness as well as keep the carbon content as low as possible, improving weldability. Among the grain refining elements, niobium has shown to be the most effective. Processing data from the HylsaMex thin slab casting/direct rolling (Compact Strip Production, CSP~®) mill were collected and analyzed. Alloying and microalloying elements are known to increase the hot deformation resistance during hot rolling. The selection for low C, Nb-microalloyed high strength grades is because these are the steels of choice for most high-end applications. Different microalloyed steel grades produced by CSP were tested and a MFS equation was proposed for low C steel grades (C～0.060%). The equation takes into account the solid solution hardening of Nb and Mn. In the present work, two innovative points are added: (ⅰ) the derivation of a new Misaka-type equation in stead of the derivation of a multiplying factor to correct the original Misaka equation and (ⅱ) the derivation of a MFS equation using data from CSP~® plant. Results are in good agreement with the expected solid solution hardening effects of Nb and Mn.
机译：大多数高端钢种都利用晶粒细化的优点来提高强度和韧性，并保持碳含量尽可能低，从而提高了可焊性。在晶粒细化元素中，铌已被证明是最有效的。收集并分析了HylsaMex薄板坯连铸/直接轧制（Compact Strip Production，CSP®）轧机的加工数据。已知合金和微合金元素会增加热轧过程中的抗热变形性。选择低碳，Nb微合金高强度等级是因为这些是大多数高端应用的首选钢。测试了CSP生产的不同等级的微合金钢，并针对低碳钢（C〜0.060％）提出了MFS方程。该方程式考虑了Nb和Mn的固溶硬化。在当前工作中，增加了两个创新点：（ⅰ）推导了新的Misaka型方程，而不是推导乘数来校正原始的Misaka方程;以及（ⅱ）使用数据推导了MFS方程来自CSP〜®工厂。结果与预期的固溶硬化Nb和Mn很好地吻合。

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