ABSTRACT

Impurity elements of Cu, Ni, Sn and Cr have been added to a model low-carbon strip steel to mimic the levels that could arise due to increased scrap recycling during steel production. The microstructure and tensile properties of the base composition and impurity added compositions after thermomechanical processing, consisting of hot rolling and simulated coil cooling, have been investigated. The addition of impurities results in a lower bainite fraction, a smaller effective grain size and the precipitation of Cu-rich particles. Meanwhile, higher strength and lower ductility are found in the steel with impurities.

中文翻译：

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杂质对低碳钢组织和力学性能的影响

摘要

已将 Cu、Ni、Sn 和 Cr 杂质元素添加到模型低碳带钢中，以模拟由于钢铁生产过程中废料回收增加而可能出现的水平。已经研究了热机械加工（包括热轧和模拟卷材冷却）后的基础组合物和添加杂质的组合物的微观结构和拉伸性能。杂质的加入导致贝氏体分数降低、有效晶粒尺寸变小和富铜颗粒析出。同时，含杂质钢的强度较高，延展性较低。