Effect of Matrix Microstructure of Gun Barrel on Its Lifetime

doi:10.3969/j.issn.1000-1093.2019.04.007

Abstract

Abstract: The damage characteristics of two different microstructured gun barrels during shooting are comparatively studied to investigate the mechanism of the effect of matrix microstructure of gun barrel on its damage rate. Its matrix structure is characterized using optical microscrope, scanning electron microscrope, and analyzed using the carbon replica and phase analysis methods. Results show that the damage rate of low-hardness gun barrel is larger than that of high-hardness gun barrel, and the former's lifetime is short. This is because the internal surface of the low-hardness gun barrel is subjected to a relatively larger plastic deformation, and the carbides in the matrix of high-hardness gun barrel show smaller sizes and distribute more homogenously, which inhibites the nucleation and propagation of the cracks. Key

Key words: gunbarrel, damage, gunbarrellifetime, gunbarrelsteel

CLC Number:

TJ203⁺.1

HU Chundong, HE Xing, LU Hengchang, DONG Han, LI Junsong. Effect of Matrix Microstructure of Gun Barrel on Its Lifetime[J]. Acta Armamentarii, 2019, 40(4): 728-736.

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