Two-dimensional electromagnetic detector and magneticrotation detection method

Abstract

The invention provides a two-dimensional electromagnetic detector for nondestructive detection and evaluation on metal materials and a magneticrotation detection method. The electromagnetic detector comprises a detector body 1, a detection coil 2, a detection coil 3 and a wiring port 4. The invention is characterized in that each group of the detecting coils comprises a pair of field coils and a pair of detecting coils; field current of the coils in each group is reasonably adjusted, which can provide a plane rotating magnetic field with a constant size for the two-dimensional magneticrotationdetection; a homograph similar to a detected workpiece is generated by a result obtained by the magneticrotation detection after treatment; the abnormal material is reflected by obvious evagination or pit of the homograph, which enables the material distribution characteristics of the metal materials to be clear, thus facilitating inspectors to evaluate the quality of the detected workpiece quickly. The invention not only can detect and evaluate components, mechanical property and tissue uniformity, but also can perform early warning on abnormal tissues such as cracking and the like.

Description

technical field [0001] The invention relates to a probe for non-destructive electromagnetic detection and evaluation of metal materials, in particular to an electromagnetic non-destructive detection probe capable of two-dimensional gyromagnetic scanning detection of internal cracks and corner cracks of metal material parts through a gyromagnetic detection method. Background technique [0002] During the heat treatment process of metal materials, due to the inhomogeneity of the material composition, the inhomogeneity of the temperature field and the difference in cooling rate, cracks often occur inside the material, especially at the sharp corners. Internal cracks and corner cracks are often generated due to stress and fatigue. The existence of cracks usually leads to the failure of components, resulting in equipment failure, and may lead to potential safety hazards. In extreme cases, it will cause machine crashes and fatalities, which will bring great losses to the property ...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The object of the present invention is to provide a two-dimensional electromagnetic detection method for problems such as difficulties in detecting internal cracks and corner cracks in metal parts, high requirements on the surface of the workpiece, high requirements on operating skills, unstable detection results, and lack of gyromagnetic characteristics. The probe and the gyromagn

Images