(1. 南京航空航天大学 材料科学与技术学院，南京 210016；
2. 江苏华阳金属管件有限公司，镇江 212400)
摘 要: 为探讨TA1-Al双金属弯头管件的塑性成形规律，采用有限元模拟首先确定双金属复合管推弯成形的界面结合强度临界值，其次研究轴向推制速度、摩擦因数对界面最大剪切应力及复合弯头壁厚分布的影响。模拟结果表明，复合弯头推弯成形的临界结合强度为50 MPa。另外，要制备界面无分层的复合弯头，推制成形速度和摩擦因数应分别小于10 mm/s和0.125。复合弯头在几何尺寸及壁厚分布方面，实验结果与有限元模拟值基本吻合。
关键字: TA1-Al复合管；弯头管件；冷推弯；数值模拟
TA1-Al bimetallic clad tube
（1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China;
2. Jiangsu Huayang Metal Pipes Co., Ltd, Zhenjiang 212400, China）
Abstract:To explore the plastic forming characteristics of TA1-Al bimetallic elbow, the critical bonding strength of the interface for the clad tube in the push-bending process was determined firstly by numerical simulation. Secondly, the effects of axial push velocity and friction coefficient on the maximum value of shear stress and the thickness distribution of the clad elbow were investigated. The simulation results show that the critical interface bond strength needed in the push-bending process is 50 MPa. Furthermore, the push velocity and the friction coefficient should be less than 10 mm/s and 0.125 for producing TA1-Al clad elbows without separation at the interface. The experimental results are approximately accordant with the simulative ones in the geometry size and thickness distribution.
Key words: TA1-Al clad tube; elbows; cold push-bending; numerical simulation
