超声无损检测技术在发动机铸件壁厚检测中的应用探索

Application of ultrasonic nondestructive testing technology in the wall thickness detection of engine castings

基于超声波在特定材料中的传播和反射基础原理,经常被用于检测工件表面与内部缺陷、材料内部组织和特征的表征,以及材料厚度测量。对于铸铁件弧面壁厚的无损检测,需要考虑非均质形态的石墨组织对声波衰减,以及测头形状和方向等因素,通过验证分析,确定出无损检测方法,可将检测误差控制在2%以内。

Based on the basic principle of ultrasonic propagation and reflection in specific materials,it is often used to detect surface and internal defects in workpieces,characterize the internal structure and characteristics of materials,and measure material thickness.For the non-destructive testing of the camber wall thickness of iron castings,it is necessary to consider the acoustic attenuation of the heterogeneous graphite structure,as well as the shape and direction of the probe,and determine the non-destructive testing method through verification analysis,which can control the detection error within 2%.