多谢二楼指点。的确是个人理解有偏差。原文是这样的9.3.1Perform the examination from the circumference of rings and hollow forgings that have an axial length greater than 2 in and an OD to ID ratio of less than 2.0 to 1.
9.3.2 use a 1Mhz,45° angle-beam search unit unless thickness,OD/ID ratio, or other geometric configuration results in failure to achive calibration.Other frequencies may be used if desirable for better resolution,penetrability,or detectability of flaws.For angle-beam inspection of hollow forgings up to 2.0-1 ratio,provide the transducer with a wedge or shoe that will result in the beam mode and angle required by the size and shape of the cross section under examination.
翻译过来是这样:从周向对厚度大于2in和外径内径比小于2.0-1的环形和中空锻件检测。
使用一个1Mhz 45°的斜探头,除非是厚度,外径内径比,或者其他几何形状限制导致校准失败。如果要求更好的分辨力,穿透力或者最小可探缺陷,也可以使用其他频率的探头。对于中空锻件外径与内径比达到2.0-1比例的,给探头加装楔块或者探头靴,以便根据截面尺寸和形状得到所需要的波型和角度。
这样说来不用横波斜探头的话,还是需要使用纵波斜探头来检验了。只是这个折射角度需要根据工件的尺寸形状来定了。这样理解对么?
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