(1. 沈阳理工大学 材料科学与工程学院，沈阳 110159；
2. 中国科学院 金属研究所，沈阳 110016)
摘 要: 通过对某公司原有TP2铜管三联拉工艺进行延伸系数和变形量的计算，发现该工序变形量大、对管材质量的影响大，且尚有可优化空间。运用有限元分析软件MSC.Marc对此工艺进行数值模拟研究，得出温度和等效应力随变形率、拉拔道次和拉拔速度变化的规律。对原有拉拔工艺中的变形温度进行实验测量，将实验结果与有限元分析结果进行比较，验证有限元模型与真实工艺的符合程度，为联合拉拔工艺的合理改进提供理论依据，并以此为基础提出优化工艺方案。综合对比分析原有的拉拔工艺和优化的拉拔工艺，发现优化工艺增大了各道次的变形率，使得变形温度有所提高，但等效应力的变化幅度较小，优化工艺方案切实可行。
关键字: 三联拉工艺；温度；等效应力；数值模拟；优化工艺
（1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China;
2. Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:The triple tube drawing process plays a significant role in large deformation and high-quality tube drawing program which can still be optimized when the elongation coefficient and deformation were computed depending on some company’s existing triple TP2 tube drawing process. The relationships among temperature, equivalent stress and deformation rate, drawing passes, drawing velocity were obtained by using the FEM software MSC.Marc. The optimized FEM model can stand for the real process, the deformation temperature of the original process was measured and contrasted with FEM result. The optimized process strategy was putted forward by the support of above mentioned analysis and corresponding theory. The optimized tube drawing process is proved to have a high pass-deformation rate which causes an apparent temperature rising, but exerts a little influence on the equivalent stress. Whatsmore, it is improved that the drawing process project is feasible.
Key words: triple drawing process; temperature; equivalent stress; numerical simulation; optimized process
