What are the advantages and disadvantages of each detection method of steel surface defects?

The main methods of steel defect detection are: manual detection, magnetic leakage detection, eddy current detection method. The manual detection method is mainly through experienced technicians to identify defects in steel, the detection results are susceptible to subjective factors; magnetic leakage detection method is the measured steel magnetization, steel in the absence of defects, the distribution of magnetic lines of force is uniform, when encountering defects, the path of the magnetic lines of force is defective change, magnetic components can be detected from the surface of the steel leakage of the overflow of the magnetic field, if the defects are too large for the detection of the effect is not ideal; Eddy current detection is due to the AC electromagnetic coil in the steel surface induction formation of eddy currents, when encountering defects, the eddy currents will change, this detection method is affected by the environment. Laser detection method, not subject to the measured rolling material material, temperature, environment and many other aspects of the impact of the defect detection can be better accomplished.

Profile Measuring Instrument is mainly in the non-manual nature of the detection equipment, image processing methods, real-time and time-sharing system combination, classification and identification of several aspects of in-depth research. This is conducive to improving the level of detection, to ensure product quality, so as to improve the market competitiveness of steel.