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为发现薄壁管焊缝内微小缺陷,通常认为:必须采用高灵敏度 X 线检验技术,对所用设备、器材提出了很高要求。我厂在开展φ10×1毫米薄壁管焊缝等 X 线检验时,通过摸索试验,全部利用国产设备和器材,获得了一般国外所提出的高要求规范的灵敏度。本文扼要介绍在提高透照灵敏度时的若干措施,以供有关单位参考。影响透照灵敏度的一些因素射线照相灵敏度是指在射线照相上能发现的最小缺陷尺寸,一般以焊缝厚度的百分此表示。照相灵敏度取决于照相的对比度和清晰度。影响对比度和清晰度的因素很多,探讨这些因素对如何采取措施来提高
In order to find the tiny defects in the thin-walled tube weld, it is generally considered that the high-sensitivity X-ray inspection technology must be adopted and high demands are placed on the equipment and equipment used. I plant in the φ10 × 1 mm thin-walled pipe weld X-ray examination, through groping test, all the use of domestic equipment and equipment, obtained by the general foreign high-demand specifications of the proposed sensitivity. This article briefly introduces some measures to improve the sensitivity of transillumination for the reference of relevant agencies. Some factors that affect transillumination sensitivity Radiographic sensitivity refers to the smallest defect size that can be found on radiographs, expressed as a percentage of the weld seam thickness. Camera sensitivity depends on the contrast and sharpness of the camera. Many factors affect the contrast and clarity of these factors on how to take measures to improve