中文摘要：

为了研究火炮制退机节制环的故障原因和失效机理,基于金属腐蚀磨损理论和微观分析技术,综合运用光学金相显微镜分析、扫描电镜及能谱分析、显微硬度测定、电感耦合等离子体质谱法和火焰原子吸收光谱法等分析测试手段,结合报废节制环和从大修工厂待修火炮上采集的驻退液样本,从微观层面分析了节制环失效机理。研究表明,节制环作为制退机产生后坐阻力的关键部件之一,主要受到冲击磨损、化学腐蚀和气蚀破坏的复合作用而失效。

英文摘要：

The failure mechanism of throttling rings in gun recoil brakes was experimentally researched from the micro level.In the experimental research,the scrapped throttling rings and recoil solutions from a repair facility were chosen as the research objects.The experimental research was carried out on the basis of metal corrosion abrasion theories and microscopic analysis technologies.The microscopic analysis technologies involved a metallurgical microscope,a scanning electron microscopy and an energy dispersive spectrometer,as well as micro-hardness measurement,inductively coupled plasma mass spectrometry and flame atomic absorption spectrometry.The above research shows that as one of vital components in a recoil brake,the failure of the throttling ring results from the combined action of impact wear,chemical corrosion and cavitation damage.