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首页> 外文期刊>Journal of Materials Engineering and Performance >Numerical and Experimental Investigation into Hot Forming of Ultra High Strength Steel Sheet
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Numerical and Experimental Investigation into Hot Forming of Ultra High Strength Steel Sheet

机译：超高强度钢板热成型的数值与实验研究

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摘要

Hot forming of ultra high strength steel (UHSS) sheet metal grade 22MnB5 boron for channel components using water cooling is studied on a laboratory scale. After hot forming, the different microstructures such as martensite, bainite, and pearlite in formed component are produced, which are closely related with mechanical properties of formed component. The effect of forming start temperature and the contact state between blank and die on the microstructure evolution is investigated. In addition, the effect of processing parameters, such as forming start temperature and blank holder force (BHF), on the final quality of component, i.e., springback, that happens after hot forming of UHSS is investigated. It can be concluded that the forming start temperature has a significant effect on the final mechanical properties of formed components. The effect of forming start temperature on springback is examined in detail under a wide range of operating conditions. The higher the BHF and the forming start temperature, the lower is the springback after hot forming. Furthermore, thermo-mechanically coupled finite element analysis model encompassing heating of sheet blank, forming and quenching are developed for hot forming process. The stress distributions on sheet blank under different conditions during hot forming are compared to gain a fundamental understanding of the mechanism of springback. Comparisons show that numerical simulation results have good agreement with experimental results.
机译：在实验室规模上研究了用于水通道冷却的用于通道组件的22MnB5级超高强度钢板（UHSS）钣金的热成型。热成型后，在成型部件中产生不同的微观结构，如马氏体，贝氏体和珠光体，这与成型部件的机械性能密切相关。研究了成形起始温度和坯料与模具之间的接触状态对组织演变的影响。另外，研究了诸如UHSS热成型之后发生的成形参数的起始参数和最终的质量，即回弹，对成形参数的影响。可以得出结论，成型开始温度对成型部件的最终机械性能有重大影响。在广泛的工作条件下，详细研究了形成起始温度对回弹的影响。 BHF和成型开始温度越高，热成型后的回弹就越低。此外，还针对热成型工艺开发了热机械耦合的有限元分析模型，其中包括板坯加热，成型和淬火。比较了热成型过程中在不同条件下板材毛坯上的应力分布，从而对回弹的机理有了基本的了解。比较表明，数值模拟结果与实验结果吻合良好。

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