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Magnetic Flaw Detector
When the workpiece magnetized magnetic detector, if the workpiece surface defects exist, due to defects generated at the reluctance magnetic flux leakage increases, the formation of local magnetic field, magnetic defects will be shown here, the shape and position to determine the presence of defects. Magnetic detector by using the different magnetization current can be divided into: DC magnetization method, half-wave DC magnetization method, and the exchange of magnetization method. According to weight and mobility equipment is divided into fixed, mobile and portable three kinds. According to the preparation of magnetic particle testing used different method can be divided into dry and wet powder method. Magnetic detector can be used to detect ferromagnetic workpiece surface and near surface size is very small, very narrow gap is difficult to see cracks and visual defects in the aerospace, aviation, railways, automobiles, ships, pressure vessels, machinery and other industries to be a wide range of applications
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