氢蚀430不锈钢中超声表面波的传播特性  

Propagation Characteristics of Ultrasonic Surface Wave in Hydrogen Attacked 430 Stainless Steel

作　　者：汪洋[1] 鹿业波[1] 潘红良[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《机械工程材料》2009年第2期86-88,91,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50875084)

摘　　要：对超声表面波在电解充氢430不锈钢中的传播特性进行了试验,使用ABWML-4ST-90°表面波探头、PCI卡采集超声波数据,利用公式得到衰减系数,并测定了充氢前后材料的显微硬度。结果表明:随着电解充氢过程的不断进行,超声表面波衰减系数显著增大,波速显著降低,与钢中氢浓度趋近于线性关系;当材料表面的氢浓度达到饱和后,衰减系数和波速也趋于恒定;不锈钢发生氢蚀后显微硬度出现了明显的下降。Propagation characteristics of ultrasonic surface wave on the surface of 430 stainless steel were studied experimentally under the conditoin of electrolytic hydrogen charging. Surface wave transducer ABWML- 4ST-90° and PCI ultrasonic card were used to collect ultrasonic data. Ultrasonic attenuation coefficient was calculated, and the microhardness was tested before and after hydrogen charging. The results showed that the ultrasonic attenuation coefficient increased clearly with the electrolytic hydrogen charging, while the ultrasonic velocity decreased markedly and there was a almost linear relationship between the velocity and hydrogen concentration. The attenuation coefficient and the velocity became almost constant after the material surface was in the stage of hydrogen saturation. The microhardness of the hydrogen attacked material decreased obviously.

关 键 词：430不锈钢 氢蚀 超声表面波 衰减系数 超声波速 

分 类 号：TG142.71[一般工业技术—材料科学与工程]