Patent ID: 8535552
Filing Date: 2013-09-17
Classification: B22D,C23F,G01N

Abstract:
1. A method of determining center segregation of a cast slab, the method comprising: providing a slab that includes segregation on a surface thereof, the surface consisting of a central region and a non-central region; applying an etching solution onto the surface of the slab for etching the segregation of the surface; providing powder to the surface of the slab, whereby the powder is received in recesses formed by etching; applying an adhesive sheet over the surface of the slab, whereby at least part of the powder from the recesses is transferred onto the adhesive sheet to form on the adhesive sheet, which represents the segregation of the surface; processing the image to determine the area of segregation in the central region and the area of segregation in the non-central region; and computing a center segregation index using the following formula: wherein X is the area of segregation in the central region, Y is the area of segregation in the non-central region, each of a, b, c and d is a constant greater than 0.