坦克火炮身管内膛镀铬层损伤分布规律研究  

Distribution law of damage for chrome coating in tank gun barrel

作　　者：宋雯程 杨国来[1] Song Wencheng;Yang Guolai(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2024年第6期679-685,共7页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(52305155);江苏省自然科学基金(BK20230904)。

摘　　要：某坦克火炮身管采用内膛镀铬技术可有效提高身管使用寿命。镀铬层身管和非镀铬层身管内膛损伤规律不一致,该文采用了理论计算和理化特性分析相结合的研究手段,探究了镀铬层身管在多发射击后的损伤退化规律。理论研究发现,身管内膛烧蚀磨损主要集中在坡膛及膛线起始部和最大膛压处,射弹500发时身管坡膛起始部烧蚀磨损量约为0.22 mm。在实际完成射弹700余发后,测试了身管内膛阳线直径变化量,并统计了发数和身管口部内膛直径累计增量的关系,由此判断镀铬层脱落情况。最后,在膛线起始部和最大膛压区选取特征点进行了微观形貌观测,并获得了表面元素质量分数。综合理论计算和理化特性分析表明,膛线起始部和最大膛压区压力和温度环境最为恶劣,镀铬层脱落情况明显,从最大膛压处到炮口处,镀铬层脱落状况逐步减轻。该文研究为揭示身管内膛镀铬层的损伤规律和破坏机理提供了一定技术参考。The use of chrome plating technology on the inner bore of an artillery barrel can effectively improve its service life.The damage patterns of chrome-plated barrels and non-chrome-plated barrels are not consistent.This paper employs a combination of theoretical calculations and physicochemical property analysis to investigate the damage degradation pattern of the chrome layer in chrome-plated barrels after multiple firings.Theoretical studies find that the barrel ablation wear is mainly concentrated on the forced cone and the beginning of the rifling and the maximum pressure zone.The peak ablation wear on the barrel chamber is 0.22 mm for 500 projectiles.Following this,after completing over 700 shots,the change in the diameter of the lands within the barrel is measured,and the relationship between the number of shots and the cumulative increase in the barrel bore diameter at the muzzle is statistically analyzed to judge chrome layer peeling.Finally,at the starting point of the rifling and the maximum pressure zone,characteristic points are selected for microscopic morphology observation,and the mass fraction of surface element is obtained.Comprehensive analysis of theoretical calculations and physicochemical properties indicates that the pressure and temperature conditions are severest at the starting point of the rifling and the maximum pressure zone,leading to evident chrome layer peeling.From the maximum pressure zone to the barrel muzzle,the extent of chrome layer peeling gradually decreases.This study provides a certain technical reference for revealing the damage patterns and failure mechanisms of the chrome layer inside the barrel.

关 键 词：身管内膛 镀铬层损伤 膛线起始部 最大膛压区 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]