In this dissertation, the key technologies of dynamic soft reduction for an ultrahigh strength steel (UHSS) have been studied in view of experiment, design, modelling and dynamic control.

本文针对超高强度钢(UHSS)动态轻压下工艺的关键技术，开展实验、设计、建模与控制方面的研究。

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The FEA also indicated that the residual stress only has little effect on the overall buckling resistance of the ultrahigh strength steel columns.

计算结果还表明，残余应力的变化对超高强度钢材焊接工形截面轴心受压柱整体稳定承载力的影响较小。

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The experimental results show that the types of crack initiation at inclusion in ultrahigh strength steel under tensile load depend on the sizes of inclusion and the hole around inclusion.

结果表明，拉伸载荷作用下，航空用超高强度钢中裂纹萌生的方式与夹杂物尺寸及夹杂物周围孔洞的大小有关。

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