Among the well-known nickel-based coatings are NiCrBSi Colmonoy coatings, which are used to protect parts against corrosion, wear, and erosion at medium and high temperatures. In this research, Colmonoy 45 and 69 coatings were coated on 304 stainless steel using laser cladding method. The microstructure and compounds formed were studied and analyzed by scanning electron microscopy and EDS microanalysis and the phase investigation of the coatings using X-ray diffraction (XRD) analysis. The wear resistance and tribological performance of these two coatings were investigated by ball on disk wear test with tungsten carbide ball at temperatures of 25, 200 and 400 degrees Celsius. In medium temperature wear tests, a decrease in the average friction coefficient was observed due to the creation of a stable oxide layer. The coefficient of friction of the coated samples was lower than the uncoated sample, which together with the results of the weight reduction and the depth of the wear track shows that the coated samples have better tribological properties. With the help of scanning electron microscopic images, the wear path was investigated and wear mechanisms were determined in each of the samples at the test temperature; The main wear mechanism in the samples is sticky and sheet wear, which was also observed in the 304 stainless steel sample without a scratch wear mechanism coating. Erosion resistance of the coated and substrate samples was also eva‎luated, which showed that the 304 stainless steel sample and Colmonoy 69 follow the behavior of brittle materials and Colmonoy 45 follow the behavior of malleable materials. According to the results of the erosion test, stainless steel samples 304 and Colmonoy 69 had the highest amount of erosion at high angles, and Colmonoy 45 showed a greater weight loss at low angles.

عبدالمجيد اسلامي , فخرالدين اشرفي زاده

مهران نحوي , مريم كرباسي