Preparation of the capillary copper/titanium composite pipe by floating-plug drawing processing and its microstructure and properties
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摘要: 在熱旋制備界面結合質量優異的銅/鈦雙金屬復合管坯的基礎上，對復合管進行了游動芯頭拉拔加工，重點研究了復合管材游動芯頭拉拔加工成形能力以及拉拔加工對復合管材組織性能的影響.研究結果表明，游動芯頭拉拔方式，特別是減壁拉拔，對銅/鈦復合管材結合界面有較大的破壞作用，且難以實現多道次連續拉拔加工，單道次拉拔加工量不宜超過30%；575℃保溫70 min的道次間退火雖然對界面元素擴散情況影響不大，但能緩解加工硬化和殘余應力，使得銅/鈦復合管材的平均剝離強度由變形態的7.8 N·mm-1提高到退火態的17.1 N·mm-1，大幅度提高銅/鈦復合管材的后續拉拔加工性能.通過嚴格控制拉拔減壁量，合理制定了銅/鈦復合管材的拉拔加工工藝，成功制備了結合性能優異的毛細規格銅/鈦復合管材.Abstract: A copper/titanium bimetallic composite pipe with high interfacial bonding quality was manufactured by the high-temperature rotary swaging forming, and then was processed by the floating-plug drawing process. The forming ability of drawing process and the effect of drawing process on the microstructure and properties of the product were mainly investigated. The results show that the floating plug drawing, especially the wall-reduction drawing, has a great destructive effect on the bonding interface of the pipe, which results in that it is difficult to carry out multi-pass continuous drawing, and single pass drawing volume should not reach over 30%. The annealing at 575℃ for 70 min has little effect on the diffusion of interfacial elements, but it can reduce the work hardening and residual stress. This process makes the pipe's average peel strength increase from 7. 8 N·mm-1 (worked state) to 17. 1 N·mm-1 (annealed state), which considerably improves the subsequent drawing performance of the pipe. A reasonable drawing forming process for the copper/titanium composite pipe was made based on the strict control of drawing wall-reduction, and a capillary size pipe with an excellent bonding property was successfully prepared.
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參考文獻
[1] Syrett B, Coit T L. Causes and prevention of power plant condenser tube failures. Mater Perform, 1983, 22(2):44 [2] Yoshitake A, Torigoe T. Centrifugally cast bimetallic pipe for offshore corrosion resistant pipelines//The Fourth International Offshore and Polar Engineering Conference. Osaka, 1994:180 [3] Ma Q L, Xu H, Wang Z W, et al. Failure analysis and critical manufacturing technology research on titanium condensers. Eng Fail Anal, 2005, 12(3):432 [4] Hosseini M, Manesh H D. Bond strength optimization of Ti/Cu/Ti clad composites produced by roll-bonding. Mater Des, 2015, 81:122 [6] Ma G C, Fu H M, Wang Z, et al. Study on fabrication and properties of 304 stainless steel capillary tubes/Zr53. 5Cu26. 5Ni5Al12-Ag3 bulk metallic glass composites. Acta Metall Sin, 2014, 50(9):1087 [7] Zhan M, Wang Y, Yang H, et al. An analytic model for tube bending springback considering different parameter variations of Ti-alloy tubes. J Mater Process Technol, 2016, 236:123 [8] Sponseller D L, Timmons G A, Bakker W T. Development of clad boiler tubes extruded from bimetallic centrifugal castings. J Mater Eng Perform, 1998, 7(2):227 [9] Liu X F, Yang L F, Zhang Y X. Wrinkling identification and wrinkle distribution of a tube in hydroforming with radial crushing. Adv Mater Res, 2011, 291:662 [10] Kustra P, Milenin A, Płonka B, et al. Production process of biocompatible magnesium alloy tubes using extrusion and dieless drawing processes. J Mater Eng Perform, 2016, 25(6):2528 [11] Kahraman N, Gülenç B. Microstructural and mechanical properties of Cu-Ti plates bonded through explosive welding process. J Mater Process Technol, 2005, 169(1):67 -
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