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首页> 外文期刊>Journal of Korean Institute of Metal and Materials >Effects of microstructures on the stretch-flangeability and tensile properties of hot-rolled high strength steel sheets
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Effects of microstructures on the stretch-flangeability and tensile properties of hot-rolled high strength steel sheets

机译:微观结构对热轧高强度钢板拉伸性凸起和拉伸性能的影响

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摘要

The effects of the microstructures on the stretch-flangeability and tensile properties of Nb or Ti-Nb added hot-rolled high strength steel with tensile strength of 60 and 70kg/mm~2 grades were investigated to improve the stretch-flangeability, through the laboratory simulation and the mill-scaleproduction. The low temperature coiling method developed using3-step controlled cooling pattern after the finish rolling wassuitable for the production of high strength steel with thepolygonal ferrite and bainite phases. The enhanced stretch-flangeability of the ferrite-bainite dual phase steel was due to thefine grain boundary cementites and the decrease of deviation inhardness between the ferrite and the bainite phases, and so thatvoid formation was suppressed relative to the other type of multi-phase steels, ferrite-bainite or ferrite-bainite-martensite steels.
机译:研究了微观结构对Nb或Ti-Nb的拉伸性和拉伸性能的效果,并通过实验室改善了拉伸强度的拉伸强度为60和70kg / mm〜2等级的拉伸强度 仿真和磨削型刮刀。 低温卷绕方法在轧制后使用的3级控制的冷却图案,用于生产高强度钢和贝氏体相的高强度钢。 铁氧体 - 贝氏体双相钢的增强的拉伸凸缘性是由于晶界凝固晶片和铁氧体和贝氏体相之间的偏差脱落的降低,因此相对于其他类型的多相钢抑制了逐个形成 ,铁素体 - 贝氏体或铁氧体 - 贝氏体 - 马氏体钢。

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