奥氏体钢焊缝无损检测专用超声传感器的研究进展

Research progress of special ultrasonic transducer used in NDT of austenitic steel welds

介绍了窄脉冲探头的主要结构和国内外研制现状。分析了压电晶片在超声探头上的作用机理,综述了压电材料的发展状况,并对国内外普遍选用的压电陶瓷材料的性能加以讨论。重点分析了背衬的作用机理及与压电晶片匹配的技术要求,对比了几种常用的背衬制作工艺的优缺点,指出钨粉是制作探头背衬的优选材料。最后,对国内探头的研制情况进行了总结和展望。

The structure of narrow pulse longitude wave angle probe and its research status at home and broad were introduced.Mechanism of action of piezoelectric wafer in probe was analyzed,and the development statuses of piezoelectricity materials were reviewed,and their capability was discussed.The emphasis of analyses is the mechanism of backing composite and technologic request on the match between backing composite and piezoelectricity wafer.The advantage and limitation in preparing backing composite were discussed,and the W powder is used as the proper material.At last,the conclusion and prospect were proposed.