东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (11): 1574-1579.DOI: 10.12068/j.issn.1005-3026.2019.11.010

• 材料与冶金 • 上一篇    下一篇

铜/铝异步轧制复合带的界面反应与强化机制

常东旭， 王平， 赵莹莹   

  1. (东北大学 材料电磁过程研究教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2019-03-15 修回日期:2019-03-15 出版日期:2019-11-15 发布日期:2019-11-05
  • 通讯作者: 常东旭
  • 作者简介:常东旭(1989-)，男，辽宁锦州人，东北大学博士研究生; 王平(1964-)，男，黑龙江哈尔滨人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51690161).

Interfacial Reaction and Strengthening Mechanism of Cu/Al Composite Strip Produced by Asymmetrical Rolling

CHANG Dong-xu， WANG Ping， ZHAO Ying-ying   

  1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2019-03-15 Revised:2019-03-15 Online:2019-11-15 Published:2019-11-05
  • Contact: WANG Ping
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摘要： 采用同步和异步轧制复合工艺制备铜/铝复合带，研究退火过程中的界面反应和异步轧制工艺的强化机制.利用扫描电镜观察界面微观组织和拉伸断口形貌，通过线扫描和电子探针分析界面元素分布，采用XRD进行界面物相分析，通过剥离和拉伸实验研究复合带的力学性能.结果表明，经400℃保温1h后界面形成具有三个亚层的扩散层组织，各亚层内元素含量存在突变;铝剥离表面检测到大量铜元素，化合物相包括CuAl2，Cu9Al4，CuAl和Cu4Al，而铜剥离表面只检测到Cu9Al4和Cu4Al;异步轧制工艺可以提高界面结合强度和复合带的拉伸性能，使界面层在拉伸断裂后破坏程度降低.

关键词: 铜/铝复合带, 异步轧制, 退火, 界面, 金属间化合物

Abstract: The symmetrical and asymmetrical rolling process was used to produce Cu/Al composite strip. Interfacial reaction during annealing and strengthening mechanism after asymmetrical rolling were investigated. The interfacial microstructure and fracture morphology of tensile test were obtained by scanning electrical microscope. The distribution of interfacial elements was analyzed by line scanning and electron microprobe analysis. The interfacial phases were analyzed by XRD. The peeling and tensile tests were carried out to study mechanical properties of the composite strips. The results indicate that the diffusion layer with three sublayers forms after annealed at 400℃ for 1h. There is a sudden change of element content in each sublayer. A large amount of copper and the CuAl2， Cu9Al4， CuAl and Cu4Al phases are detected on the Al peeled surface， while only the Cu9Al4 and Cu4Al phases are detected on the Cu peeled one. Therefore， the asymmetrical rolling bonding can improve the interfacial strength and tensile property of the composite strip and reduce the damage of interfacial interlayer from the failure.

Key words: Cu/Al composite strip, asymmetrical rolling, annealing, interface, intermetallic compound

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