Effect of hot-dip Al on microstructure and mechanical properties of Al-Si/38CrMo composite interface during solid-liquid forming

被引：0
作者：
Mao H.-K. [1 ]
Guo B.-X. [1 ]
Fan Z.-Y. [1 ]
Xu H. [1 ]
Hou F.-M. [1 ]
Cao X. [1 ]
Zhao Q.-S. [2 ]
Hou J.-B. [3 ]
Liu S.-Y. [2 ]
Wang Y. [1 ]
机构：
[1] School of Materials Science and Engineering, North University of China, Taiyuan
[2] Shanxi Zhongbing Foundry Co., Ltd., Datong
[3] Shanxi Diesel Engine Industry Co., Ltd., Datong
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Aluminum; Hot-dip; Interface bonding; Mechanical property; Microstructure; Steel;
D O I：
10.11817/j.ysxb.1004.0609.2020-40109
中图分类号：
学科分类号：
摘要：
38CrMo alloy steel and Al-Si-Cu-Mg high strength casting aluminum alloy were used as raw materials for solid-liquid composite casting. The experiments of hot-dip plating pure Al and Al-Si alloy at 720 ℃ for 5-20 min were carried out, and the steel/aluminum composite with good interface metallurgical bonding was prepared. The effects of hot-dip time and hot-dip composition on the microstructure and mechanical properties of steel/aluminum interface were studied. The results show that the interfacial intermetallic compounds are Fe2Al5 and FeAl3 during hot-dip pure aluminum; and the interfacial intermetallic compounds are Fe2Al5 and Al8Fe2Si during hot-dip Al-Si alloy. The thickness of intermetallic compound layer increases with the increase of hot-dip time. The maximum interfacial microhardness of hot-dip pure aluminum and Al-Si alloy are 535.2 HV and 580.6 HV respectively, and the maximum shear strength are 28.4 MPa and 39.4 MPa, respectively. At the same hot-dip time, the thickness of intermetallic compound layer formed by hot-dip pure Al is larger than that formed by hot-dip Al-Si alloy, mainly because the existence of Si element reduces the diffusion coefficient of Fe and Al atoms, hinders the diffusion between Fe and Al atoms, and inhibits the growth of intermetallic compound layer. © 2022, China Science Publishing & Media Ltd. All right reserved.
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页码：485 / 496
页数：11
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