Effect of Hot-Dip Zn and Al-Zn Alloys on Microstructure and Properties of Steel/Aluminum Composite Interface

Author of the article:XIA Jianqiang1 , WANG Yu2 , FAN Zongyi2 , XU Hong2

Author's Workplace：1. Anhui Hengli Additive Manufacturing Technology Co., Ltd., Wuhu 241200, China; 2. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China

Key Words：steel/aluminum; solid-liquid composite casting; hot-dip galvanizing; intermetallic compounds; mechanical property

Abstract：The steel matrix was hot dipped in molten pure zinc and Al-Zn alloy for different times, and then aluminum alloy was poured to obtain the steel/aluminum composite casting. The effects of hot dip time and hot dip alloy on the microstructure and mechanical properties of steel/aluminum interface in steel/aluminum composite castings were studied. The results show that Fe2Al5 continuous phase layer and FeAl3 dispersed particle phase layer are formed at the interface between steel and aluminum after hot dip plating of pure zinc and Al-Zn alloy. The thickness of intermetallic compound layer increases with the extension of hot dip time. The maximum interfacial shear strength of steel is 64.6 MPa after hot dip zinc plating. The maximum interfacial shear strength is 83.2 MPa after hot dip Al-Zn alloy.