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首页> 外文期刊>Metals and Materials International >Microstructural Characterization and Softening Mechanism of Ultra-Low Carbon Steel and the Control Strategy in Compact Strip Production Process
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Microstructural Characterization and Softening Mechanism of Ultra-Low Carbon Steel and the Control Strategy in Compact Strip Production Process

机译：超低碳钢的微观结构特征及软化机理及紧凑型生产工艺控制策略

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摘要

In this paper, the microstructures and properties of hot rolled ultra-low carbon steel sheet produced by different compact strip production (CSP) processes were investigated. The softening mechanism was also discussed and the control strategy was proposed in order to obtain optimum properties. Result showed that the average ferrite grain sizes of austenite rolling sheet and multiphase rolling sheet were 31.0 mu m and 74.6 mu m, respectively. The sheet after austenite rolling had a slightly higher yield and tensile strength while had a 6.3% higher elongation than that of the sheet after multiphase rolling. The higher dislocation in the sheet after multiphase rolling increased the strength while decreased the elongation. The softening mechanism of the sheet after multiphase rolling was the coarsening of ferrite grain. The combined role of {001} and {111} orientation resulted in a slight increase of the r and r value in the sheet after multiphase rolling. It was a wise choice to conduct rolling at the -Ac1 temperature in CSP process to increase the grain size and decrease the dislocation density. Then, the strength of the sheets could be further reduced and the elongation could also be improved.
机译：本文研究了不同小型条带制造（CSP）工艺生产的热轧超低碳钢片的微观结构和性能。还讨论了软化机理，提出了对照策略以获得最佳性能。结果表明，奥氏体轧制板和多相轧制片的平均铁氧体粒径分别为31.0μm和74.6μm。奥氏体轧制后的片材的产率略高，抗拉强度略高，而多相轧制后的伸长率高出6.3％。多相轧制后较高的脱位增加了强度，同时降低了伸长率。多相轧制后板材的软化机理是铁氧体晶粒的粗化。 {001}和{111}方向的组合作用导致纸张在多相轧制后的r和 r值的略微增加。在CSP过程中在-Ac1温度下进行轧制是一种明智的选择，以增加晶粒尺寸并降低位错密度。然后，可以进一步降低片材的强度并且也可以改善伸长率。

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