基于声学特征分析的镨钕合金无损检测方法研究  

NDT method of praseodymium alloy based on acoustic feature analysis

作　　者：钟睿 曾波华 李嘉豪 曹乐乐 ZHONG Rui;ZENG Bohua;LI Jiahao;CAO Lee(Ganzhou Polytechnic,Ganzhou 341000,China;Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]赣州职业技术学院,江西赣州341000 [2]江西理工大学,江西赣州341000

出　　处：《中国有色冶金》2024年第1期119-126,共8页China Nonferrous Metallurgy

基　　金：江西省重点创新研发平台计划(20181BCD40009);江西省离子型稀土资源绿色开发与高值利用国家重点实验室培育计划(20194AFD44003)。

摘　　要：当前镨钕等稀土合金铸锭成品的质量检测工序均采用人工钻检法和化学分析法,存在着质检周期长、成本高、严重依赖人工经验等缺陷,本文基于声学特征分析的技术,结合传感器、信号处理、经典工程控制等理论,提出了一种无损的物理检测方法。首先对熔盐电解得到镨钕合金进行成分分析,确定其碳含量指标可作为金属质量的分类特征,并且依靠声学信号能判断金属碳含量;其次采集镨钕合金受到外界脉冲激励时的声学信号,通过分析声学信号的时域波形,建立镨钕合金碳含量与其声学信号特征的内在关联模型;最后正交实验结果表明,声学信号的时域特征能较好区别镨钕合金的高低碳差异。The current quality inspection process of finished praseodymium and other rare-earth alloy ingots uses manual drilling method and chemical analysis method, which has defects such as long quality inspection period, high cost and serious reliance on manual experience. This paper proposes a non-destructive physical inspection method based on the technology of acoustic feature analysis, combined with the theory of sensors, signal processing and classical engineering control. Firstly, the smelting process of praseodymium alloy obtained by molten salt electrolysis is analyzed to determine that its carbon content index can be used as a classification characteristic of metal quality, and the acoustic signal can be relied on to determine the metal carbon content. Secondly, the acoustic signal of praseodymium alloy is collected when it is excited by external pulses, and the inner correlation model between the carbon content of praseodymium alloy and its acoustic signal characteristics is established by analyzing the time domain waveform of the acoustic signal. Finally, the results of the orthogonal experiments show that the time domain characteristics of the acoustic signal can better distinguish the difference between high and low carbon of praseodymium alloy.

关 键 词：熔盐电解 质量检测 声学特征 碳含量 镨钕合金 无损检测 

分 类 号：TF111.522[冶金工程—冶金物理化学] TF845