非破坏性测试 超声波测试 透过法

[中文适用范围]： 本文件规定了超声波穿透法原理。超声波穿透法可用于：- 不连续性的检测;- 声衰减的确定。工业产品超声波检验所用的一般原则在ISO 16810中给出。用于测试扁平材料，例如板和薄板。此外，它可以用于以下试验，例如:- 形状、尺寸或方向不有利于直接反射的可能不连续性的检测;- 高声衰减材料;- 薄试件。 [外文原描述]： This document specifies the principles of ultrasonic through-transmission techniques. Through-transmission techniques can be used for: — detection of discontinuities; — determination of sound attenuation. The general principles required for the use of ultrasonic testing of industrial products are described in ISO 16810. The through-transmission technique is used for the testing of flat products, e.g. plates and sheets. Further, it can be used for tests, for example: — where the shape, dimensions or orientation of possible discontinuities are unfavourable for direct reflection; — of materials with high sound attenuation; — on thin test objects.