Method of measuring the degree of alloying of a galvanized steel sheet using laser beams

摘要

A method of measuring the degree of alloying of galvanized steel sheet through the use of laser beams includes the steps of directing a laser beam on a standard sample and reflecting and splitting the beam and detecting the intensity of specular reflection I0 ( alpha ) at an angle of reflection ( alpha ) and the intensity of scattering I0 ( beta ) at an angle of reflection ( beta ) to thus obtain the degree of alloying (X0) of the standard sample by the formula: The above steps are repeated to obtain values I1 ( alpha ) and I2 ( beta ) to obtain a comparative degree of alloying (X1) of the standard sample using the above equation form. The arrangement of the laser, mirror and first and second beam splitters are corrected based on a comparison of the X0 and X1 values. The above steps are then repeated by directing the laser onto a galvanized steel sheet to obtain the degree of alloying (X2) of the galvanized steel sheet.