1前言超声波探伤中，为使声强能有效的透入工件，提高超声探伤的灵敏度余量，保证探头与工件实现接触，耦合剂起着至关重要的作用。多年来，由于机油有良好的透声性，有适当的附着力，并且对工件无腐蚀等优点，故在超声探伤中广泛使用机油作为耦合剂，但机油清洗困难，对后续的 1 Introduction Ultrasonic flaw detection, in order to make the sound intensity can penetrate the workpiece effectively, improve the sensitivity of ultrasonic flaw detection margin to ensure that the probe and the workpiece to achieve contact, the coupling agent plays a vital role. Over the years, due to the oil has a good sound permeability, proper adhesion, and no corrosion on the workpiece, so widely used in ultrasonic flaw detection oil as a coupling agent, but the oil cleaning difficulties, the follow-up