(1. 南京航空航天大學 材料科學與技術學院，南京 210016；
2. 江蘇華陽金屬管件有限公司，鎮(zhèn)江 212400)
摘 要: 為探討TA1-Al雙金屬彎頭管件的塑性成形規(guī)律，采用有限元模擬首先確定雙金屬復合管推彎成形的界面結合強度臨界值，其次研究軸向推制速度、摩擦因數(shù)對界面最大剪切應力及復合彎頭壁厚分布的影響。模擬結果表明，復合彎頭推彎成形的臨界結合強度為50 MPa。另外，要制備界面無分層的復合彎頭，推制成形速度和摩擦因數(shù)應分別小于10 mm/s和0.125。復合彎頭在幾何尺寸及壁厚分布方面，實驗結果與有限元模擬值基本吻合。
關鍵字: TA1-Al復合管；彎頭管件；冷推彎；數(shù)值模擬
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
