两种同类型胶片基础特性及检测应用比对

文摘针对如何在液体火箭发动机产品射线检测过程中,根据具体情况选择合适的射线胶片,达到既能保证射线检测图像质量又能提高检测效率减少检测成本的目的,本文通过对进口富士IX100型胶片和国产乐凯牌L7型胶片的特性和质量稳定性进行工艺对比试验。结果表明,L7型胶片本底灰雾度稍大于IX100型胶片,灵敏度逊于IX100型胶片,宽容度高于IX100型;但两者均属于GB/T19348.1—2003规定的T3范畴胶片,综合性能比较接近;L7型胶片适用于发动机上具有变截面的铝铸件、机加余量不大的钢铸件、钛铸件及大部分熔焊缝的射线检测。

Comparison of Basic Characteristics and Testing Application of Two Same Type Films

_{In order to ensure the image quality, improve the efficiency and reduce the cost of detection, it is necessary to select the appropriate radiograph according to the specific situation in the process of liquid rocket engine product ray detection. In this paper, the characteristics and quality stability of imported Fuji IX100 film and domestic Lekai L7 film were compared, the results show that the background haze of L7 film is slightly higher than that of IX100 film ,the sensitivity is lower than that ofIX100 film, and the tolerance is higher than that of IX100 film; However, both of them belong to T3 category film specified in GB/T19348.1-2003, and their comprehensive properties are relatively close; L7 film is suitable for X-ray inspection of aluminum castings with variable cross-section, steel castings with small machining allowance, titanium castings and most of fusion welds on engines.}