利用铒K边吸收增强空心叶片残芯X射线检出能力的原理和方法  

Principle and Method of X-Ray Detection Quality for Residual Core in Hollow Turbine Blade Enhanced by Erbium K-Edge Absorption

作　　者：吴汉昌 李玲 曹红 姚刚 贺平逆 WU Han-chang;LI Ling;CAO Hong;YAO Gang;HE Ping-ni(School of Physical Sciences,Guizhou University,Guiyang 550025,Guizhou,China;Guiyang AECC Power Precision Casting Co.,Ltd.,Guiyang 550014,Guizhou,China)

机构地区：[1]贵州大学物理学院,贵州贵阳550025 [2]贵阳航发精密铸造有限公司,贵州贵阳550014

出　　处：《铸造》2025年第2期237-245,共9页Foundry

基　　金：空心涡轮叶片残芯/缺陷的射线标识检出技术研究(GZ-2023-工程技术部-0005);贵州大学引进人才科研基金(贵大人基合字-2020-38)。

摘　　要：针对目前航空制造业对提高空心涡轮叶片残芯X射线检测质量的迫切需求,本文提出,利用示踪元素K边吸收,以增强残芯的X射线检出能力,这一新技术思路。通过模拟计算研究和试验验证,明确以75~90 kVp W靶X射线作为检测光源,Er作为示踪元素,可充分发挥K边吸收作用,显著提高残芯标记检出效果。另外,以ErCl_(3)作为示踪溶液,对具备工程应用价值的浸泡标记法进行了试验研究,同时结合现行脱芯工艺,研究了KOH浸泡对Er渗入的促进机理。研究结果表明,Er在硅基陶瓷中的渗入量随ErCl_(3)溶液浓度、浸泡时间和浸泡温度的增加而增加。KOH预浸泡处理使硅基陶瓷由多晶结构转变为无定形结构,促进了ErCl_(3)的渗入和滞留,使Er在陶瓷中的渗入量显著增加。本文为基于X射线检测的残芯标记法走向工程化应用提供了新的技术思路和数据支撑。In response to the urgent demand of the aviation manufacturing industry to improve the quality of X-ray detection of hollow turbine blade residual cores,this paper proposed a new technology approach to enhance the X-ray detection ability of the residual cores by utilizing the K-edge absorption of tracer elements.Through simulation calculations and experimental validation,it was clarified that using 75-90 kVp W target X-ray as the detection source and Er as the tracer element can fully utilize the K-edge absorption and significantly improved the detection effect of the residual cores.In addition,an experimental study on the immersion tagging method with practical engineering value was conducted using ErCl_(3)as the tracer solution,and the mechanism of KOH immersion promoting Er penetration was studied in combination with the current removal process of residual cores.The results showed that the penetration of Er in silicon-based ceramics increased with the increase of ErCl_(3)solution concentration,immersion time,and immersion temperature.The preimmersion treatment with KOH converted the polycrystalline structure of the silicon-based ceramic into an amorphous structure,which promoted the penetration and retention of ErCl_(3),resulting in a significant increase in the penetration of Er in the ceramic.This paper provided new technical ideas and data support for the engineering application of the residual cores tagging method based on X-ray detection.

关 键 词：涡轮空心叶片 残余型芯 X射线检测 K边吸收 铒标记 

分 类 号：TG115.281[金属学及工艺—物理冶金]