Preparation Method and Diffusion Mechanism of Fe-Al Coating on Q235 Low Carbon Steel by Pack Aluminizing

被引：0
|
作者：
Li N. [1 ,2 ]
Chen Y. [2 ]
Chen X. [1 ]
Yin L. [1 ]
Chen G. [2 ]
机构：
[1] School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou
[2] MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing
来源：
Chen, Guang (gchen@njust.edu.cn) | 1600年 / Chinese Journal of Materials Research卷 / 35期
基金：
中国国家自然科学基金;
关键词：
Diffusion coefficient; Fe-Al layer; Metallic materials; Micro-hardness; Pack aluminizing;
D O I：
10.11901/1005.3093.2020.449
中图分类号：
学科分类号：
摘要：
The Fe-Al coating, with compactness, stiffness, and continuity, could be prepared on Q235 low carbon steel by pack aluminizing. The phase structure, morphology, composition, and hardness of the prepared coating were characterized by XRD, SEM, EDS, and micro-hardness tester respectively. Results indicate that the Fe-Al coating is composed of Fe2Al5 and FeAl3 phases, whilst, the coating fabricated at 750℃ is particularly rich in Fe2Al5 phase. With the rising temperature, the thickness of Fe-Al coating increases, whereas the micro-hardness decreases. As a result of aluminizing for different time, the formed coatings are composed of the two phases Fe2Al5 and FeAl3 as well. However, with the increasing aluminizing time, the content of FeAl3 phase decreases, while the micro-hardness of the coating decreases slightly. Finally, a diffusion mechanism related with the formation of Fe-Al coating is proposed based on the comprehensive analysis on the thermodynamics and kinetics of pack aluminizing process. © 2021, Editorial Office of Chinese Journal of Materials Research. All right reserved.
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页码：572 / 582
页数：10
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