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In this paper, it is introduced the technical index of NK electromagnetic ultrasonic flaw detector in 460 working zone of Steel Tube Co. of Baotou Steel, theoretical explanations of ultrasonic testing and working principles of electronic equipment for flaw detection, emphatically introduced the structure and parameter specification of electromagnetic acoustic transducer (EMAT) probe as well as the principle of waveform emission. The test results of longitudinal, transverse and delamination thickness measurement for steel tube with this equipment are stable through the actual flaw detection applications, which play a positive role in the quality control for steel tube products of the company.

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文章介绍了包钢钢管公司460作业区NK电磁超声探伤设备的技术指标，超声波检测方法理论说明和探伤电子设备工作原理，着重介绍了EMAT探头的结构、参数说明及波形发射的原理。通过实际探伤应用，该设备对钢管的纵向、横向、分层测厚缺陷有较稳定的检测结果，为该公司钢管产品质量把关起到了积极的作用。

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李军（1982-），男，内蒙古包头市人，工程师，现从事探伤设备电气维护工作。

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李军（1982-），男，内蒙古包头市人，工程师，现从事探伤设备电气维护工作。

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