Effect of Process Parameters on the Interface Microstructure and Thickness of Silver Cladding Copper Wires Prepared by Core-Cladding Continuous Casting

  • Feng Yi
  • Xuefeng Liu
  • Yue Pan
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


Liquid silver and solid copper with diameter of 8 mm were used as raw materials, and the silver cladding copper (SCC) wires with a diameter of 10 mm were prepared by the self-developed core-cladding continues casting (CCC) method at the silver casting temperature of 1000–1100 °C, casting speed of 30 –90 mm min−1, cooling water temperature of 20 °C and cooling water flow of 300 L h−1. The microstructure and morphology, distribution of chemical components, and phase composition of the interface between Ag and Cu were characterized by optical microscope (OM), field emission scanning electron microscope (FESEM), and energy dispersive spectrometer (EDS). The effect of the silver casting temperature and casting speed on the interface microstructure and thickness of silver cladding copper wires and formation mechanism of the interface were investigated. The results showed that the interface microstructure which from the surface to the Cu core of the silver cladding copper wire was Ag (Cu) solid solution, hypoeutectic, eutectic and Cu (Ag) solid solution when the silver casting temperature was 1050 °C and casting speed was 30–60 mm min−1. And the interface microstructure which from the surface to the Cu core of the silver cladding copper wire was Ag (Cu) solid solution, eutectic and Cu (Ag) solid solution when the casting speed increase to 90 mm min−1 and the silver casting temperature was 1000–1050 °C. The interface microstructure which from the surface to the Cu core of the silver cladding copper wire is all hypereutectic, when the silver casting temperature was 1100 °C, casting speed was 90 mm min−1. With the increase of the casting speed, the thickness of the interface transition layer decreased sharply, the thickness of the hypoeutectic layer and Ag (Cu) solid solution layer decreased, and the eutectic layer thickness increased first and then decreased, but the thickness of Cu (Ag) solid solution remained almost constant. Under the condition of low casting temperature and high casting speed, core-cladding continues casting technology is advantageous to prepare the bimetallic composite material which is prone to eutectic reaction.


Silver cladding copper wire Core-cladding continuous casting Process parameters Interface quality 



This research was financially supported by the National Natural Science Foundation of China (Grant No. 51674027) and the National Key Research and Development Program of China (Grant No. 2016YFB0301301).


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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Beijing Laboratory of Metallic Materials and Processing for Modern TransportationUniversity of Science and Technology BeijingBeijingChina

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