Interface reaction of high-strength low-alloy steel with Al–43.4Zn–1.6Si (wt.%) metallic coating
Wang-jun Peng1,2,3, Guang-xin Wu1,2,3, Yi Cheng1,2,3, Jie-yu Zhang1,2,3
1 State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China 2 Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200072, China 3 School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
Interface reaction of high-strength low-alloy steel with Al–43.4Zn–1.6Si (wt.%) metallic coating
Wang-jun Peng1,2,3, Guang-xin Wu1,2,3, Yi Cheng1,2,3, Jie-yu Zhang1,2,3
1 State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China 2 Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200072, China 3 School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
摘要 The microstructure, elemental distribution, phase composition, and thickness of intermetallic layers between high-strength low-alloy steel (H420)/mild carbon steel (DC51) and Al–43.4Zn–1.6Si (wt.%) (galvalume, GL) alloy were comparatively investigated. The experimental results reveal that the interfacial reaction layer was composed of Fe2Al5, Fe4Al13, and Al8Fe2Si intermetallic compounds. Moreover, the growth curves of the Fe2Al5 and Fe4Al13 intermetallic layers fit the parabolic law well, and the total thickness of the intermetallic layers of H420 + GL was almost the same as that of DC51 + GL. However, the thickness of the Fe2Al5 layer in H420 + GL was thinner than that in DC51 + GL. In addition, first-principle calculations were performed to explore the effect of Mn on the growth of the Fe2Al5 intermetallic phase, and the results indicate that Mn substitution in Fe2Al5 removes electronic charge from the Al atoms, thus decreasing the thickness of the Fe2Al5 interface layer.
Abstract：The microstructure, elemental distribution, phase composition, and thickness of intermetallic layers between high-strength low-alloy steel (H420)/mild carbon steel (DC51) and Al–43.4Zn–1.6Si (wt.%) (galvalume, GL) alloy were comparatively investigated. The experimental results reveal that the interfacial reaction layer was composed of Fe2Al5, Fe4Al13, and Al8Fe2Si intermetallic compounds. Moreover, the growth curves of the Fe2Al5 and Fe4Al13 intermetallic layers fit the parabolic law well, and the total thickness of the intermetallic layers of H420 + GL was almost the same as that of DC51 + GL. However, the thickness of the Fe2Al5 layer in H420 + GL was thinner than that in DC51 + GL. In addition, first-principle calculations were performed to explore the effect of Mn on the growth of the Fe2Al5 intermetallic phase, and the results indicate that Mn substitution in Fe2Al5 removes electronic charge from the Al atoms, thus decreasing the thickness of the Fe2Al5 interface layer.
Wang-jun Peng,Guang-xin Wu,Yi Cheng, et al. Interface reaction of high-strength low-alloy steel with Al–43.4Zn–1.6Si (wt.%) metallic coating[J]. Journal of Iron and Steel Research International, 2019, 26(12): 1304-1314.
2019, Vol. 26 
