NDT超声波探伤仪在高速重轨检测中的应用

介绍了NDT超声波探伤仪的工作原理,阐述了高速重轨在线探伤前的各项准备工作：样轨的制作、探伤仪灵敏度的调整、以及标样的重复性报准试验,并对超声波探伤仪在高速重轨中的应用进行了大量试验,经统计、对比、化验和分析,得出如下结论：超声波探伤仪整体性能稳定、可靠;高速重轨检出率低于其他重轨检出率;检测中尚未发现漏检,但存在部分误检现象;检出伤轨中,绝大部分缺陷集中在轨腰区域,这些缺陷主要是氧化物,硫化物和硅酸盐夹杂。

The Application of NDT Ultrasonic Flaw Detection in the High Speed Rail

This paper introduces the work theory of NDT ultrasonic flaw detection instruments and details all kinds of preparing items： manufacture of sample rail,sensibility adjustment of ultrasonic instruments and exacted repetitive test of standard sample rail.This paper makes a lot of application experiments of NDT in the high speed rail ultrasonic flaw detection.Following conclusions were drawn through stating,contrasting,assaying and analyzing： the whole capability of NDT is stably and credible;and the inspection rate of high speed rail is lower than other rails.Although the phenomenon of undetected fault during inspection is not found,there are still a few miscalculations,many of which are centralized in the middle of checked rail due to oxidation,sulphuration and silication.