一、概述:车轴维修时,检查表面的疲劳裂纹的方法到目前为止不外乎:肉眼直观检查法、液体渗透法和电磁探伤法。在铁路系统中应用较广泛的是电磁探伤法。它的独特优点是:设备简单、成本低、操作容易和携带方便;对部件的表面微细裂纹都能准确地检查出来。然而上述这些方法,被检查的部位必须是看得见。因此对检查车轴轮座部位裂纹时,增加了退轮工序。 First, an overview: Axle repair, check the surface of the fatigue crack method so far nothing more than: visual inspection, liquid penetration and electromagnetic detection method. In the railway system is widely used in electromagnetic detection method. Its unique advantages are: simple equipment, low cost, easy operation and easy to carry; fine cracks on the surface of the components can be accurately checked out. However, these methods, the site to be checked must be visible. Therefore, check the wheel seat parts of the crack, an increase of the wheel back process.