Abstract
The barrel is the core component of the artillery, and its inner coating is the key material to effectively protect the barrel and improve its service lifetime. Due to its good properties, CrN/Cr composite is a potential alternative to the currently used Cr coating. In this study, finite element simulation has been performed using the software Ansys Workbench to analyze the temperature field and coupled stress field of the Cr coating barrel and the CrN/Cr composite coating barrel, respectively, during the firing. The results showed that compared with Cr coating barrel, the CrN/Cr coating can reduce the temperature and significantly mitigate the stress in the coating/steel matrix interface; thus, it is expected the CrN/Cr coating can better protect the artillery barrel.
Highlights
As the decisive weapon in short-range combat, artillery undertakes a variety of tactical tasks, such as assault, air defense, anti-ship, land strike, and firepower suppression
It is prone to ablation and wear, which affects its maximum range, hitting accuracy, and service lifetime, because it is exposed to extreme conditions for a long time
Cr coating is a common protective layer for the barrel of artillery, but it is hard and brittle, and its performance and processing technology have not been fundamentally improved for decades
Summary
As the decisive weapon in short-range combat, artillery undertakes a variety of tactical tasks, such as assault, air defense, anti-ship, land strike, and firepower suppression. In this study, finite element simulation of the temperature field and thermomechanical coupling effect of the CrN/Cr composite coating barrel is performed, which aims to gain insight into the performance of this coating in extreme environment and provide theoretical guidance for the design of the artillery barrel. During the launching process of the artillery, the inner wall of the barrel will be subject to a transient impact This impact includes the effects of heat and mechanics. In the finite element simulation of the temperature field of the artillery barrel, thermal convection is the most important form of exchange. Thermal convection refers to the exchange of heat between the solid surface and the surrounding fluid due to the temperature difference. Compared with the finite element formula for general elastic problems, the load end in the finite element equation increases the temperature equivalent load P0e
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