工艺参数对楔横轧42CrMo/Q235复合材料层合轴厚径比的影响
Influence of process parameters on thickness-radius ratio of cross-wedge rolling of laminated shaft of 42CrMo/Q235 composites

借助ANSYS/LS-DYNA软件，建立楔横轧层合轴有限元模型，根据四因素三水平的正交实验进行部分厚径比轧制实验。通过有限元数值模拟，分析工艺参数成形角、展宽角、断面收缩率和轧制温度对厚径比的影响规律。结果表明：轧制实验结果和有限元模拟的结果相符合，有限元模型可以用来预测厚径比。厚径比随着展宽角的增大先迅速下降，后缓慢下降；随着轧制温度的增大先增加，后缓慢增加；随着断面收缩率的增大先缓慢增加，后趋于平缓；随着成形角的增大变化不明显。对厚径比的影响主次为：展宽角、轧制温度、断面收缩率、成形角。研究结果有助于指导层合轴覆材厚度和基材半径尺寸的调控与设计。 By using ANSYS/LS-DYNA software, the finite element(FE) model of cross-wedge rolling of laminated shafts was established. Some thickness-radius ratio rolling experiments were carried out under the orthogonal experimental designed with four factors and three levels. Through finite element simulation, the effect of process parameters including forming angle, spreading angle, area reduction and rolling temperature on thickness-radius ratio were analyzed. The results show that the rolling experimental results accord with the simulation results, which shows that finite element model can be used to predict thickness-radius ratio. With the increase of spreading angle, the thickness-radius ratio sharply decreases first and then slowly decreases. With the increase of temperature, the thickness-radius ratio strengthens first and then slowly strengthens. With the increase of area reduction, the thickness-radius ratio slowly strengthens first and then changes little. With the increase of forming angle, the thickness-radius ratio change is not obvious. The influencing sequence on the thickness-radius ratio is spreading angle, rolling temperature, area reduction and forming angle in turn. The research results contribute to control and design clad material thickness and matrix material radius size of laminated shaft. 国家自然科学基金（51405248；51475247）；国际科技合作项目（CB11-13）；浙江省新苗计划资助项目（2015R405073）