Short-time Heat Bearing Capacity of Thick Gauge Steel/Aluminum/Aluminum Composite Plate Rolled at Different Temperature

LI Junquan; LIU Wenwen; CHEN Ke; SHI Yujie; ZHANG Peng

doi:10.3969/j.issn.1674-6457.2025.07.001

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (7) : 1-8. DOI: 10.3969/j.issn.1674-6457.2025.07.001

Composite Material Rolling Technology and Equipment

Short-time Heat Bearing Capacity of Thick Gauge Steel/Aluminum/Aluminum Composite Plate Rolled at Different Temperature

LI Junquan, LIU Wenwen^*, CHEN Ke, SHI Yujie, ZHANG Peng

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Abstract

The work aims to investigate the effects of short-term thermal load treatment on the distribution of Fe and Al elements and microstructure at the interface of thick steel/aluminum/aluminum alloy clad plates, and reveal the effect of thermal load on the interfacial bonding properties of the clad plates. Firstly, the steel/aluminum/aluminum alloy composite plate with a thickness of 15.32 mm was prepared by the two-pass different temperature rolling composite method. Secondly, the composite plate was subject to short-term thermal load treatment at different temperature by box resistance furnace. Finally, by analyzing the element diffusion, bonding properties and matrix microstructure properties of the composite plate interface, the effect of short-term thermal load temperature parameters on the mechanical properties and microstructure of the thick steel/aluminum/ aluminum alloy composite plate was studied. After the composite plate was subject to thermal loads at different temperature, there was no significant difference in the thickness of the Fe and Al element diffusion layer, which was between 1.5 μm and 1.6 μm, and no continuous intermediate compound layer was formed. With the increase of thermal load temperature, the interfacial shear and pull-out strength of the composite plate gradually decreased from 77 MPa and 153 MPa to 61 MPa and 95 MPa. The fracture position was located in the middle aluminum layer, which was ductile fracture, while the side bending performance was good and no obvious defects appeared. At the same time, the grain size of the steel side and the aluminum side at the interface of the composite plate also gradually increased from 9.56 μm and 4.89 μm to 12.54 μm and 10.39 μm, and the dislocation density at the aluminum side of the composite plate also decreased. In conclusion, when the thick steel/aluminum/aluminum alloy composite plate is subject to short-term thermal load, the grain size of the bonding interface increases with the increase of temperature, and the dislocation density decreases obviously, which leads to the decrease of the interfacial shear and pull-off strength of the composite plate.

Key words

steel/aluminum/aluminum composite plate / short-time high temperature / binding performance / side bending property

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LI Junquan, LIU Wenwen, CHEN Ke, SHI Yujie, ZHANG Peng. Short-time Heat Bearing Capacity of Thick Gauge Steel/Aluminum/Aluminum Composite Plate Rolled at Different Temperature[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 1-8 https://doi.org/10.3969/j.issn.1674-6457.2025.07.001

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Funding

; Fund：The National Natural Science Foundation of China (52005361); Special Funding Project of China Postdoctoral Science Foundation (2023T160474); Central Leading Local Science and Technology Development Fund Project (YDZJSX2022A022, YDZJSX2022A023)