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运用软件Deform-3D数值模拟了钛合金大规格棒材的轧制过程。建立了绝对压下量分别为30、41、50 mm的工艺条件下φ300 mm×2000 mm棒坯三辊斜轧的数值模型,分析了轧制过程中轧件的等效应力、应变的分布及变形规律,并利用点追踪分析了不同压下量轧件横截面上的轧制力、等效应力、应变和损伤的变化规律。模拟结果表明,轧制过程稳定,等效应力、应变分布均匀;轧制力、等效应力-应变和损伤随压下量的变化而变化,心部损伤明显并呈现一定的变化规律。试验验证了模型的合理性和可行性。模拟结果可为后续的工艺参数优化、心部裂纹研究及试验提供参考依据。
The software Deform-3D was used to simulate the rolling process of large-size titanium alloy bar. The numerical model of three-roll skew rolling of φ300 mm × 2000 mm bar under the condition of absolute reduction of 30, 41 and 50 mm was established. The equivalent stress and strain distribution and the distribution of strain during the rolling process were analyzed. The law of deformation was analyzed. The rolling force, equivalent stress, strain and damage on the cross section of different rolling reduction were analyzed by point tracking. The simulation results show that the rolling process is stable and the equivalent stress and strain distribution are uniform. The rolling force, equivalent stress-strain and damage vary with the reduction of pressure, and the damage of the heart is obviously and shows a certain variation. The experiment verifies the rationality and feasibility of the model. The simulation results can provide reference for the subsequent optimization of process parameters, heart crack research and experiment.