Eddy current testing is an alternating magnetic field generated by an alternating current acting on the conductive material to be tested, inducing eddy currents. If there is a defect in the material, it will interfere with the generated eddy currents, i.e. create an interference signal.
By detecting its interference signal with an eddy current flaw detector, the state of the defect can be known. There are many factors that affect the eddy current, that is to say, the eddy current contains abundant signals, and these signals are related to many factors of the material. How to separate the useful signals from the many signals is a difficult problem for the current eddy current researchers. , some progress has been made over the years, and some problems can be solved under certain conditions, but it is far from meeting the requirements of the scene and needs to be vigorously developed.
The remarkable feature of eddy current flaw detection is that it can work on conductive materials, not necessarily ferromagnetic materials, but the effect on ferromagnetic materials is poor. Secondly, the surface finish, flatness, and edge of the workpiece to be tested have a great influence on eddy current testing, so eddy current testing is often used for non-ferromagnetic workpieces such as copper pipes with regular shapes and smooth surfaces. Grade 2 Pure Titanium Bar
没有评论:
发表评论