SURFACE-TREATMENT OF CAST-IRON BY ADDING DIFFERENT ALLOYING ELEMENTS TO FORM A METALLIC-GLASS STRUCTURE LAYER USING AN INDUSTRIAL CARBON-DIOXIDE LASER

This work was conducted to examine the prospect of forming a metallic glass layer on the surface of gray cast iron by adding boron, silicon and cobalt; coupled with the utilization of an industrial carbon dioxi de (CO2) laser. Three different mixing ratios of the aforementioned al loying elements as well as four different groove sizes on the surfaces of the samples were examined. Characteristics of the laser-formed lay ers on the surfaces of the samples were determined by the utilization of X-ray diffraction techniques, mechanical and Rockwell hardness test ing methods, and metallographic examinations. The test results led to the conclusion that the formation of amorphous metal on the surface of gray cast iron is possible and practical when certain percentages of mixing ratios of boron, silicon and cobalt are used and irradiated wit h a 1300 watts industrial CO2 laser.