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METHOD AND DEVICE FOR DETECTING NEAR-SURFACE DEFECTS BY MEANS OF MAGNETIC LEAKAGE FLUX MEASUREMENT
METHOD AND DEVICE FOR DETECTING NEAR-SURFACE DEFECTS BY MEANS OF MAGNETIC LEAKAGE FLUX MEASUREMENT
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机译:用磁漏通量测量方法检测近表面缺陷的方法和装置
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摘要
In a method for detecting near-surface defects in a test sample consisting at least partly of a ferromagnetic material, a test volume of the test sample is magnetized and scanned for the detection of magnetic leakage fields caused by defects. The test volume is magnetized by means of a magnetic constant field and simultaneously by means of a magnetic alternating field superposed on the constant field. Leakage field test devices suitable for carrying out the method are described.
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