一种小口径火箭弹弹头超声检测方法

针对小口径镁合金火箭弹弹头的结构和存在缺陷的类型,采用水浸式的超声检测方法,分析了偏心距和水声程对检测灵敏度的影响,推导出了偏心距和水声程的计算方法。通过与X射线对弹头检测结果的对比分析可知,采用中心频率为5 MHz的水浸式聚焦探头,能准确检测出弹头内部存在的夹杂和裂纹缺陷,并对表面的划伤缺陷也有很高的检测灵敏度。通过C扫描方式对缺陷特征的重构,能直观地判定缺陷的位置、形状和大小。为小口径火箭弹弹头的缺陷检测提供了一种有效的检测手段。

A ultrasonic testing method of minor-caliber rocket shell warhead

According to the minor-caliber magnesium alloy rocket shell warhead's structure characteristics and intrinsic flaws,an ultrasonic immersion testing method on it was adopted.In analyzing the linear eccentricity and acoustic water length's influence on the sensitivity,the expressions of correlative parameters were developed.In comparison with the X-ray testing result,the following conclusions were reached: the focus probe with 5 MHz main frequency can detect the inclusion and crackle flaws in the warhead accu...