中图分类号:TG249.6；TG292；TB331 文献标志码 A
Effects of Pouring Temperature and Ni Coating on Interfacial Microstructure of Al/Mg Bimetal Prepared by Lost Foam Casting
Zhang Zheng, Jiang Wenming, Li Guangyu, Guan Feng, Zhu Junwen, Yu Yang, Fan Zitian
(State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology)
Abstract:The lost foam casting(LFC) process was used to prepare the solid liquid compound of Al/Mg bimetal with a Ni coating on the surface of A536 aluminium alloy prepared by plasma spraying technology, and the effects of pouring temperature and Ni coating on interfacial microstructure of Al/Mg bimetal were investigated with the help of scanning electron microscopy and energy dispersive spectrometer. The results reveal that the interface layer thickness of the Al/Mg bimetal with Ni coating is less than that of one without a Ni coating under the same conditions, and the compositions of the interface layer of the Al/Mg bimetal with Ni coating are also different from that of one without Ni coating. The pouring temperature also has a prominent influence on the interfacial microstructure and compositions of the Al/Mg bimetal with Ni coating. The thickness of interface layer is increased with the increase of the pouring temperature, and a acceptable interfacial microstructure can be obtained at 730 ℃.
Key Words: Pouring Temperature, Ni Interlayer, Lost Foam Casting, Al/Mg Bimetal, Interfacial Microstructure