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首页> 外文期刊>ISIJ international >Effect of Nb on Hot Rolled High Strength Steel Sheets Produced by Thin Slab Casting and Hot Direct Rolling Process
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Effect of Nb on Hot Rolled High Strength Steel Sheets Produced by Thin Slab Casting and Hot Direct Rolling Process

机译：铌对薄板坯连铸和热轧直接生产热轧高强度钢板的影响

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摘要

In order to meet to the demands from automobile industry such as weight reduction and safety improvement, the hot rolled high strength steel sheets have been used mainly for suspension parts. While, the steel production by thin slab casting (TSC) and hot direct rolling (HDR) process has been noticed. In this study, the characteristics of the high strength hot rolled steels produced by TSC-HDR were discussed comparing with the conventional process and concluded as follows; (1) The effect of difference of production route on the relationship between tensile strength and elongation or tensile strength and stretch flangeability was small. (2) Strength obtained by TSC-HDR route was higher than those of conventional production route in Nb bearing steel. This means Nb effectively works as a strengthening element in TSC-HDR route. (3) The addition of Nb and Mn was effective on the improvement of tensile strength and stretch flange-abilty relationship. Especially when the stretch flangeabilty was compared in the same TS level, Nb bearing steels exhibited more than two times of the value of plain C-Mn steel.
机译：为了满足汽车工业的要求，例如减轻重量和提高安全性，热轧高强度钢板主要用于悬架零件。同时，已经注意到通过薄板坯连铸（TSC）和热直接轧制（HDR）工艺进行的钢铁生产。本研究对TSC-HDR生产的高强度热轧钢的特性与常规工艺进行了讨论，得出以下结论： （1）生产路线的不同对拉伸强度与伸长率或拉伸强度与拉伸凸缘性之间关系的影响很小。 （2）TSC-HDR路线获得的强度高于传统的Nb轴承钢生产路线。这意味着Nb有效地充当了TSC-HDR路线中的强化元素。 （3）Nb和Mn的添加对改善拉伸强度和拉伸凸缘-能力关系是有效的。尤其是在相同的TS水平下比较拉伸凸缘性时，Nb轴承钢的表现是普通C-Mn钢的两倍以上。

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