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一、前言超声、射线和电磁探伤法是当前无损检测技术的三大支柱。超声波探伤法是利用材料和内部缺陷声学性质的差异及其对超声波传播情况的影响来探测材料内部缺陷的。超声波探伤法具有灵敏度高,穿透力强,检验速度快,成本低和对人无害等优点。所以,目前已广泛应用于工农业生产各部门,成为重要的无损检测手段之一。由于目前传统的超声波探伤法误差较大,可靠性差,给客观地制定判废标准带来一定的困难。为了对缺陷的大小、形状、性质等有更确切的了解,实现客观地定量化探
I. Foreword Ultrasound, radiography and electromagnetic flaw detection are the three pillars of the current NDT technology. Ultrasonic testing is the use of materials and internal defects in the acoustic properties of the differences and its impact on the ultrasonic propagation to detect the material defects. Ultrasonic flaw detection method with high sensitivity, penetration, test speed, low cost and harmless to people and so on. Therefore, it has been widely used in various sectors of industrial and agricultural production, becoming one of the important non-destructive testing methods. Due to the current traditional ultrasonic flaw detection error is large, the reliability is poor, to objectively set the standard for sentenced to ruin bring some difficulties. In order to have a better understanding of the size, shape and nature of defects,