Abstract Adiabatic blanking of advanced high-strength steels with initial flow stresses above 1300 MPa is investigated. The blanked edge exhibits a unique S-shape. Localisation and properties of shear bands are analysed in shear-compression tests. A shear-compression stress state before separation leads to blanked edges without fracture zone, burr, or roll-over. Numerical modelling predicts the characteristic shape of the blanked edge satisfactorily. Physics-based models reveal that the strain rate sensitivity of the workpiece material is the key parameter affecting the width and the surface hardness of the shear band. Stress triaxiality and strain rate sensitivity determine the minimum size of radii in complex parts blanked without failure.

中文翻译：

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高级高强度钢的绝热下料

摘要 研究了初始流动应力大于 1300 MPa 的高级高强度钢的绝热冲裁。消隐边缘呈现出独特的 S 形。在剪切压缩试验中分析了剪切带的定位和特性。分离前的剪切-压缩应力状态导致没有断裂区、毛刺或翻转的空白边缘。数值建模令人满意地预测了消隐边缘的特征形状。基于物理的模型表明，工件材料的应变率敏感性是影响剪切带宽度和表面硬度的关键参数。应力三轴性和应变率敏感性决定了无故障冲裁的复杂零件的最小半径尺寸。