枪管基体组织对枪管寿命的影响

doi:10.3969/j.issn.1000-1093.2019.04.007

摘要/Abstract

摘要： 为了探明枪管基体组织对枪管损伤速率影响的机理，对比研究了两种不同基体组织枪管在射击过程中的损伤表现。采用光学显微镜、扫描电子显微镜对枪管基体组织进行表征，通过碳复型、相分析对枪管基体组织进行分析。结果表明，低硬度枪管损伤速率大于高硬度枪管，导致前者寿命较低。出现这一结果的原因是：一方面低硬度枪管内表面发生了较大的塑性变形，导致内径扩大速率增加，寿命缩短；另一方面高硬度基体碳化物分布较为细小、弥散，抑制裂纹形核扩展能力大于低硬度基体。

关键词: 枪管, 损伤, 枪管寿命, 枪管钢

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

中图分类号:

TJ203⁺.1

胡春东，何星，陆恒昌，董瀚，李峻松. 枪管基体组织对枪管寿命的影响[J]. 兵工学报, 2019, 40(4): 728-736.

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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第40卷
第4期2019 年4月兵工学报ACTA
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